Here is my new weekly weather quiz question. What is a “Jet Max?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is sending moisture and smoke northward at us. A frontal system (position shown is Friday) will be bringing more clouds and a continued chance of precipitation for the middle to the end of the workweek.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 33 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 25 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING UNTIL 11 PM TONIGHT FOR THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST, THE WILLAMETTE NATIONAL FOREST, THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE CENTRAL BLUE MOUNTAINS, THE UMPQUA NATIONAL FOREST AND THE SOUTH OREGON CASCADES AND THE UMPQUA NATIONAL FOREST, AND THE SOUTH OREGON CASCADES.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR SEAL ROCK STATE PARK BEACH FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA  – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS  SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy with a slight (20%) chance of isolated evening showers and thunderstorms, a slight (20%) chance of showers late tonight,
• Partly cloudy and cooler Wednesday and Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of afternoon showers, mostly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms in the evening,  a (40%) chance of showers late Thursday night,
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Friday, partly cloudy with a slight (20%) chance of evening showers, then just partly cloudy late Friday night.
• lows 58-54 highs 86-78.
• Partly cloudy Saturday AM, mostly sunny and a bit warmer in the afternoon, Sunday and Monday, mostly clear Saturday night and Sunday night, partly cloudy Monday night,
• Then partly cloudy and warmer Tuesday.
• highs 82-87 lows near 53. (seasonal averages high 83 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with patchy smoke and a slight (20%) chance of thunderstorms this evening, partly cloudy with patchy smoke and a slight (20%) chance of showers late tonight,
• Partly cloudy with patchy smoke Wednesday and a bit cooler with a slight (20%) chance of AM thunderstorms, sunny in the afternoon, mostly clear in the evening, becoming mostly cloudy with more patchy smoke and a slight (20%) chance of showers late Wednesday night,
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, a bit cooler with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon and evening, a slight (20%) chance of showers late Thursday night,
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy in the afternoon, mostly cloudy in the evening, mostly clear at night.
• lows 64-66 highs 85-80.
• Sunny and a bit warmer Saturday, Sunday and Monday, clear each night except partly cloudy late Monday night,
• Partly cloudy Tuesday AM, then sunny and a bit warmer in the afternoon.
• highs 87-92 lows 53-56. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with patchy smoke and a slight (20%) chance of thunderstorms tonight,
• Mostly cloudy Wednesday with patchy smoke and a slight (20%) chance of AM coastal thunderstorms and a slight (20%) chance of afternoon showers while partly cloudy with a slight (20%) chance of AM inland showers and sunny inland Wednesday afternoon, partly cloudy in the evening inland and  mostly cloudy with a slight (20%) chance of showers late Wednesday night while a slight (20%) chance of coastal showers late at night,
• Mostly cloudy with a (30%) chance of showers Thursday, a slight (20%) chance of showers at night,
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy in the afternoon, then mostly clear late Friday night.
• lows near 56 highs 64-66.
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear at night,
• Partly cloudy Monday AM, sunny in the afternoon, mostly clear in the evening, then partly cloudy Monday night and Tuesday.
• highs near 66 lows near 54. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with a (30%) chance of scattered showers and thunderstorms this evening, a slight (20%) chance of showers late tonight,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Wednesday afternoon and evening, just partly cloudy late Wednesday night,
• Partly cloudy and a bit cooler with a good (50%) chance of showers and thunderstorms in the afternoon, mostly cloudy with a good (50%) chance of showers and thunderstorms in the evening, a good (50%) chance of showers and a slight (20%) chance of thunderstorms late Thursday night,
• A mix of clouds and sun and a bit cooler with a (40%) chance of showers and a slight (20%) chance of thunderstorms Friday, just partly cloudy late at night.
• snow level above 8,000 ft. tonight through Thursday night.
• lows 48-44 highs 76-64.
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear both nights.
• Then mostly sunny Monday AM, then partly cloudy in the afternoon through Tuesday.
• snow level above 8,000 ft. Friday, free air freezing level 11,000 ft. Friday night and Saturday, 12,000 ft. Saturday night and Sunday, 13,000 ft. Sunday night, then 12,000 ft. Monday.
• highs 72-75 lows near 48.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my new weekly weather quiz question. What is a “Jet Max?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is sending moisture and smoke northward at us. A frontal system (position shown is Friday) will be bringing more clouds and a continued chance of precipitation for the middle to the end of the workweek.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 16 in the Moderate category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING FROM 5 PM UNTIL 11 PM TODAY FOR THE UMPQUA NATIONAL FOREST, AND THE SOUTH OREGON CASCADES.
• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING UNTIL 11 PM TONIGHT FOR THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST, THE WILLAMETTE NATIONAL FOREST, THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE CENTRAL BLUE MOUNTAINS, THE UMPQUA NATIONAL FOREST AND THE SOUTH OREGON CASCADES.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR SEAL ROCK STATE PARK BEACH FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA  – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS  SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• A mix of clouds and sun today with a slight (20%) chance of AM showers,  partly cloudy with a (30%) chance of isolated evening showers and thunderstorms, a slight (20%) chance of showers late tonight,
• Partly cloudy and cooler Wednesday and Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of afternoon showers and thunderstorms, mostly cloudy with a (40%) chance of showers and thunderstorms in the evening,  a (40%) chance of showers late Thursday night.
• highs 85-78 lows 58-55.
• A mix of clouds and sun with a (40%) chance of showers Friday AM, a slight (20%) chance of afternoon showers, mostly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Friday night and Saturday AM, mostly sunny and a bit warmer in the afternoon and Sunday, mostly clear both nights,
• Mostly sunny Monday AM, then partly cloudy and a bit cooler in the afternoon.
• highs 77-84 lows near 53. (seasonal averages high 84 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of thunderstorms this AM, partly cloudy with patchy smoke and a slight (20%) chance of thunderstorms this afternoon and evening, mostly cloudy with patchy smoke and a slight (20%) chance of showers late tonight,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday afternoon and at night,
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, a bit cooler with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon and evening,  then a (30%) chance of showers late Thursday night.
• highs 85-80 lows 60-58.
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy and a bit warmer in the afternoon and evening, mostly clear at night,
• Then sunny and a bit warmer Saturday, Sunday and Monday, clear each night.
• highs 80-90 cooling to 87 lows near 57. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with patchy smoke and a (30%) chance of isolated showers late this afternoon, patchy smoke and a slight (20%) chance of isolated showers tonight,
• Mostly cloudy patchy smoke and a bit warmer with a slight (20%) chance of showers Wednesday, partly cloudy and a bit warmer with a slight (20%) chance of showers in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
• Mostly cloudy with a (30%) chance of showers Thursday, then a slight (20%) chance of showers at night.
• highs near 66 lows near 58.
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy in the afternoon and evening, mostly clear late Friday night,
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear at night,
• Then just partly cloudy Monday AM and sunny in the afternoon.
• highs 66-70 lows 56-54. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy today with a slight (20%) chance of AM showers, a (30%) chance of scattered showers and thunderstorms this afternoon, partly cloudy with a (30%) chance of scattered showers and thunderstorms this evening, a slight (20%) chance of showers late tonight,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Wednesday afternoon, a slight (20%) chance of evening showers and thunderstorms, just partly cloudy late Wednesday night,
• Partly cloudy Thursday AM, mostly cloudy with a good (50%) chance of showers and thunderstorms in the afternoon, mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms in the evening, a good (50%) chance of showers and a slight (20%) chance of thunderstorms late Thursday night.
• snow level above 8,000 ft. today through Thursday night.
• highs 75-66 lows 50-43.
• A mix of clouds and sun with a (40%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, partly cloudy and a bit cooler in the afternoon and evening, just partly cloudy late at night,
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear both nights.
• Then mostly sunny Monday.
• snow level above 8,000 ft. Friday, free air freezing level 11,000 ft. Friday night and Saturday, 12,000 ft. Saturday night and Sunday, 13,000 ft. Sunday night, then 12,000 ft. Monday.
• highs 65-72 cooling to 68 Monday lows 42-48.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my new weekly weather quiz question. What is a “Jet Max?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving in behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that is leaving us. A frontal system will push in (position shown is Wednesday) bringing more clouds, slightly cooler temperatures and a continued chance of precipitation.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 70 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 63 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING FROM 5 PM UNTIL 11 PM TUESDAY FOR THE UMPQUA NATIONAL FOREST, AND THE SOUTH OREGON CASCADES.
• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING UNTIL 11 PM TUESDAY FOR THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST, THE WILLAMETTE NATIONAL FOREST, THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE CENTRAL BLUE MOUNTAINS.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with a slight (20%) chance of showers and thunderstorms tonight,
• A mix of clouds and sun Tuesday with a slight (20%) chance of AM showers, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late Tuesday night,
• Mostly cloudy Wednesday AM, partly cloudy and cooler in the afternoon and evening, mostly cloudy late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a (40%) chance of afternoon and evening showers and a slight (20%) chance of thunderstorms, mostly cloudy with a (40%) chance of showers and thunderstorms in the evening,  a (40%) chance of showers late Thursday night.
• lows 58-55 highs 84-78.
• A mix of clouds and sun with a (40%) chance of showers Friday, mostly cloudy with a (40%) chance of evening showers, just partly cloudy late Friday night and Saturday AM, mostly sunny and a bit warmer in the afternoon and Sunday, mostly clear both nights,
• Mostly sunny Monday AM, then partly cloudy and a bit cooler in the afternoon.
• highs 77-84 cooling to 82 Monday lows near 53. (seasonal averages high 84 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of evening thunderstorms, mostly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms late tonight,
• Mostly cloudy with patchy smoke and a slight (20%) chance of thunderstorms Tuesday AM, partly cloudy with patchy smoke and a slight (20%) chance of thunderstorms in the afternoon and evening, mostly cloudy with patchy smoke and a slight (20%) chance of showers late Tuesday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday afternoon and at night,
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, a bit cooler with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon and evening,  then a (30%) chance of showers late Thursday night.
• lows 60-58 highs 85-80.
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy and a bit warmer in the afternoon and evening, mostly clear at night,
• Then sunny and a bit warmer Saturday, Sunday and Monday, clear each night.
• highs 80-90 cooling to 87 lows near 57. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with a slight (20%) chance of evening inland thunderstorms, patchy smoke with a slight (20%) chance of showers and thunderstorms late tonight,
• Mostly cloudy with patchy smoke and a (30%) chance of showers and a slight (20%) chance of  inland thunderstorms Tuesday AM and a slight (20%) chance of inland afternoon thunderstorms while patchy smoke and a slight (20%) chance of coastal showers Tuesday, patchy smoke and a slight (20%) chance of showers Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers Wednesday AM, partly cloudy and a bit warmer with a slight (20%) chance of showers in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
• Mostly cloudy with a (30%) chance of showers Thursday, then a slight (20%) chance of showers at night.
• lows near 58 highs near 66.
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy in the afternoon and evening, mostly clear late Friday night,
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear at night,
• Then just partly cloudy Monday.
• highs 66-70 lows 56-54. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Mostly cloudy with a (40%) chance of scattered evening showers and thunderstorms, a slight (20%) chance of isolated showers and thunderstorms late tonight (under 0.10 in of rain possible, more in storms),
• A mix of clouds and sun Tuesday with a slight (20%) chance of AM showers, a (30%) chance of scattered showers and thunderstorms and a bit warmer in the afternoon, mostly cloudy with a (30%) chance of scattered showers and thunderstorms in the evening, partly cloudy with a (30%) chance of isolated showers late Tuesday night,
• A mix of clouds and sun with a slight (20%) chance of showers Wednesday AM, a slight (20%) chance of showers and thunderstorms and a bit cooler in the afternoon, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, just partly cloudy late Wednesday night,
• A mix of clouds and sun and a bit cooler Thursday with showers likely (60%) and a slight (20%) chance of thunderstorms in the afternoon, mostly cloudy and a bit warmer with showers likely (60%) and a slight (20%) chance of thunderstorms in the evening, mostly cloudy with  a good (50%) chance of showers and thunderstorms late Thursday night.
• snow level above 8,000 ft. tonight through Thursday night.
• lows 47-50 cooling to 43 Thursday night highs 75-66.
• Mostly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, partly cloudy and a bit cooler with a slight (20%) chance of showers in the afternoon and evening, just partly cloudy late at night,
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear both nights.
• Mostly sunny Monday AM, then partly cloudy Monday afternoon.
• snow level above 8,000 ft. Friday and Friday night, free air freezing level 12,000 ft. Saturday, 13,000 ft. Saturday night, 14,000 ft. Sunday and Sunday night, then 13,000 ft. Monday.
• highs 65-72 cooling to 68 Monday lows 42-48.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my new weekly weather quiz question. What is a “Jet Max?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving in behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that is leaving us. A frontal system will push in (position shown is Wednesday) bringing more clouds, slightly cooler temperatures and a continued chance of precipitation.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING UNTIL 11 PM TUESDAY FOR THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST, THE WILLAMETTE NATIONAL FOREST, THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE CENTRAL BLUE MOUNTAINS.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy today with a slight (20%) chance of showers and thunderstorms this afternoon, becoming mostly cloudy with a slight (20%) chance of showers and thunderstorms tonight,
• A mix of clouds and sun Tuesday, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms in the evening, a slight (20%) chance of showers late Tuesday night,
• Mostly cloudy Wednesday AM, partly cloudy and cooler in the afternoon and Wednesday night.
• highs 86-82 lows 60-56.
• A mix of clouds and sun and just a bit cooler Thursday with a (40%) chance of afternoon showers and thunderstorms, mostly cloudy with a good (50%) chance of showers and thunderstorms in the evening,  a good (50%) chance of showers and a slight (20%) chance of thunderstorms late Thursday night,
• A mix of clouds and sun with a (40%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, a slight (20%) chance of showers in the afternoon, mostly cloudy with a slight (20%) chance of evening showers, just mostly clear late Friday night,
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear Saturday night.
• highs 78-84 lows 57-52 warming to 84 Saturday night. (seasonal averages high 84 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms this afternoon, mostly cloudy with patchy smoke and a slight (20%) chance of evening thunderstorms, a (30%) chance of scattered thunderstorms late tonight,
• Mostly cloudy with patchy smoke and a (30%) chance of thunderstorms Tuesday AM, partly cloudy with a slight (20%) chance of thunderstorms in the afternoon and evening, mostly cloudy with patchy smoke a slight (20%) chance of showers late Tuesday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday afternoon and at night.
• highs 86 lows near 60.
• Mostly cloudy and cooler with a slight (20%) chance of showers Thursday AM, a bit cooler with a (30%) chance of thunderstorms in the afternoon and evening,  just mostly cloudy late Thursday night.
• Mostly cloudy Friday AM, partly cloudy and a bit warmer in the afternoon and evening, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
• Then sunny and warmer Sunday.
• highs 80-90 lows 58-56. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with a slight (20%) chance of showers this afternoon, a slight (20%) chance of evening inland thunderstorms, patchy smoke with a (30%) chance of showers and a slight (20%) chance of thunderstorms late tonight,
• Mostly cloudy with patchy smoke and a slight (20%) chance of  thunderstorms Tuesday AM while a slight (20%) chance of inland afternoon thunderstorms, mostly cloudy with patchy smoke and a slight (20%) chance of coastal showers at night while a slight (20%) chance of evening inland thunderstorms and a slight (20%) chance of showers late Tuesday night,
• Then mostly cloudy with a slight (20%) chance of showers Wednesday and partly cloudy with a slight (20%) chance of showers Wednesday night.
• highs near 66 lows near 58.
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, a (30%) chance of afternoon thunderstorms, a slight (20%) chance of showers in the evening, just mostly cloudy late Thursday night,
• Partly cloudy Friday and Friday night,
• Then mostly sunny and a bit warmer Saturday and Sunday, mostly clear at night.
• highs 66-70 lows 56-54. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun with a good (50%) chance of scattered showers and thunderstorms this afternoon (0.10 in. of rain possible, more in storms), becoming mostly cloudy with a (40%) chance of scattered evening showers and thunderstorms, a (40%) chance of isolated showers and thunderstorms late tonight (under 0.10 in of rain possible, more in storms),
• A mix of clouds and sun Tuesday with a slight (20%) chance of AM showers, a (30%) chance of scattered showers and thunderstorms and a bit warmer in the afternoon, partly cloudy with a (30%) chance of scattered showers and thunderstorms in the evening, partly cloudy with a (30%) chance of showers late Tuesday night,
• Partly cloudy with a slight (20%) chance of showers Wednesday AM, a slight (20%) chance of showers and thunderstorms and a bit cooler in the afternoon and evening, then just partly cloudy late Wednesday night.
• snow level above 8,000 ft. today through Wednesday night.
• highs near 76 lows near 48.
• A mix of clouds and sun and a bit cooler Thursday with showers likely (60%) and a slight (20%) chance of thunderstorms in the afternoon, mostly cloudy and a bit warmer with showers likely (60%) and a slight (20%) chance of thunderstorms in the afternoon, mostly cloudy with showers likely (60%) and a slight (20%) chance of thunderstorms in the evening, mostly cloudy with  a good (50%) chance of showers and thunderstorms late Thursday night,
• Mostly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, partly cloudy with a slight (20%) chance of showers in the afternoon and evening, just partly cloudy late at night,
• Mostly sunny and warmer Saturday and Sunday, mostly clear Saturday night.
• snow level above 8,000 ft. Thursday through Friday night, free air freezing level 12,000 ft. Saturday, 14,000 ft. Saturday night, then 15,000 ft. Sunday.
• highs 65-72 lows 44-47.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What is the “dew point?”  Here is the correct answer.The Dew Point (Abbrev. DWPT) – A measure of atmospheric moisture. It is the temperature to which air must be cooled in order to reach saturation (assuming air pressure and moisture content are constant). A higher dew point indicates more moisture present in the air. It is sometimes referred to as Dew Point Temperature, and sometimes written as one word (Dewpoint). I’ll have a new weekly weather quiz question for you starting Monday. Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving in behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that is leaving us. A frontal system will push in (position shown is Wednesday) bringing more clouds, slightly cooler temperatures and a continued chance of precipitation.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 19 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 19 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR THUNDERSTORMS PRODUCING ABUNDANT LIGHTNING FROM NOON MONDAY UNTIL 11 PM TUESDAY FOR THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST AND THE WILLAMETTE NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM TUESDAY FOR THUNDERSTORMS WITH ABUNDANT LIGHTNING FOR THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE CENTRAL BLUE MOUNTAINS.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy tonight,
• Partly cloudy Monday with a slight (20%) chance of showers and thunderstorms in the afternoon, becoming mostly cloudy with a (30%) chance showers and thunderstorms at night,
• A mix of clouds and sun Tuesday, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late Tuesday night,
• Mostly cloudy Wednesday AM, partly cloudy in the afternoon and Wednesday night with a slight (20%) chance of evening showers
• lows 57-60 cooling to 54 Wednesday night highs near 85.
• A mix of clouds and sun and just a bit cooler Thursday with a (30%) chance of afternoon showers and thunderstorms, partly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the evening, mostly cloudy with a slight (20%) chance of showers late Thursday night,
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy with a slight (20%) chance of showers Friday afternoon and evening, just partly cloudy late Friday night,
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear Saturday night.
• highs 78-84 lows near 55. (seasonal averages high 84 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy and hazy with more patchy smoke tonight,
• Partly cloudy with AM haze, patchy smoke and a slight (20%) chance of thunderstorms Monday afternoon, mostly cloudy with patchy smoke and a slight (20%) chance of thunderstorms, a (30%) chance of thunderstorms late Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday AM, partly cloudy with a slight (20%) chance of showers thunderstorms in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers late Tuesday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Wednesday and and at night.
• lows near 60 highs 86-88.
• Mostly cloudy and cooler with a (30%) chance of showers and a slight (20%) chance of thunderstorms Thursday and Thursday night.
• Mostly cloudy Friday AM, sunny and a bit warmer in the afternoon, mostly clear at night,
• Mostly sunny Saturday, mostly clear Saturday night,
• Then sunny and warmer Sunday.
• highs 88-78 warming to 86 Friday and Saturday lows 59-57. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Partly cloudy this evening, mostly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of coastal showers Monday afternoon, a slight (20%) chance of evening inland thunderstorms, a (30%) chance of showers and a slight (20%) chance of thunderstorms late Monday night,
• Mostly cloudy with a slight (20%) chance of coastal showers Tuesday while mostly cloudy with a slight (20%) chance of inland AM showers and partly cloudy with a slight (20%) chance of afternoon thunderstorms, mostly cloudy with a slight (20%) chance of coastal showers at night while a slight (20%) chance of evening inland thunderstorms and a slight (20%) chance of showers late Tuesday night,
• Then mostly cloudy with a slight (20%) chance of showers Wednesday and Wednesday night.
• lows near 58 highs near 66.
• Mostly cloudy with a slight (20%) chance of showers Thursday and in the evening, just mostly cloudy late Thursday night and Friday AM, sunny in the afternoon, mostly clear at night,
• Then mostly sunny and a bit warmer Saturday and Sunday, mostly clear at night.
• highs 70-66 warming back to 70 Friday lows near 56. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of showers and thunderstorms this evening, just partly cloudy late tonight and Monday AM, mostly cloudy with a (30%) chance of showers and thunderstorms in the afternoon (under 0.10 in. of rain possible, more in storms), mostly cloudy with a (40%) chance of showers and thunderstorms Monday night (under 0.10 in of rain possible, more in storms),
• A mix of clouds and sun Tuesday with a slight (20%) chance of AM showers, a slight (20%) chance of showers and thunderstorms and a bit warmer in the afternoon, mostly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, partly cloudy with a slight (20%) chance of showers late Tuesday night,
• Partly cloudy with a slight (20%) chance of showers Wednesday AM, a slight (20%) chance of showers and thunderstorms and a bit cooler in the afternoon and evening, then a slight (20%) chance of showers late Wednesday night.
• snow level above 8,000 ft. tonight through Wednesday night.
• lows near 48 highs near 76.
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of AM showers, just a bit warmer with a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a (30%) chance of showers and thunderstorms in the evening,  mostly cloudy with  a slight (20%) chance of showers and thunderstorms late Thursday night,
• Mostly cloudy with a slight (20%) chance of showers and thunderstorms Friday AM, partly cloudy in the afternoon and at night,
• Partly cloudy Saturday AM, mostly sunny and warmer in the afternoon, mostly clear Saturday night,
• Then mostly sunny Sunday.
• snow level above 8,000 ft. Thursday through Friday, free air freezing level 11,000 ft. Friday night, then 13,000 ft. Saturday through Sunday.
• highs 65-72 lows 43-47.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What is the “dew point?”  Here is the correct answer.The Dew Point (Abbrev. DWPT) – A measure of atmospheric moisture. It is the temperature to which air must be cooled in order to reach saturation (assuming air pressure and moisture content are constant). A higher dew point indicates more moisture present in the air. It is sometimes referred to as Dew Point Temperature, and sometimes written as one word (Dewpoint). I’ll have a new weekly weather quiz question for you starting Monday. Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving in behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that is leaving us. A frontal system will push in (position shown is Wednesday) bringing more clouds, slightly cooler temperatures and a continued chance of precipitation.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 5 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FROM 11 AM TODAY UNTIL 11 PM TUESDAY FOR THUNDERSTORMS WITH ABUNDANT LIGHTNING FOR THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, AND THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy this AM, partly cloudy this afternoon and evening, mostly cloudy late tonight,
• A mix of clouds and sun with a slight (20%) chance of showers and thunderstorms Monday afternoon, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late at night,
• A mix of clouds and sun with a slight (20%) chance of showers and a bit warmer Tuesday, partly cloudy with a slight (20%) chance of evening showers, then mostly cloudy with a slight (20%) chance of showers late Tuesday night.
• highs 85-88 lows 58-60 cooling back to 58 Tuesday night.
• Mostly cloudy Wednesday AM, partly cloudy in the afternoon and Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a (30%) chance of afternoon thunderstorms, mostly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the evening, a slight (20%) chance of showers late Thursday night,
• Mostly cloudy with a slight (20%) chance of AM showers, just partly cloudy and a bit warmer Friday and Friday night,
• Then partly cloudy in the AM and mostly sunny and warmer Saturday afternoon.
• highs 84-77 warming to 84 Saturday lows 56-53. (seasonal averages high 84 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with patchy smoke today and a slight (20%) chance of AM showers, partly cloudy and hazy with more patchy smoke this afternoon and  tonight,
• Partly cloudy with patchy smoke and a slight (20%) chance of thunderstorms Monday afternoon, mostly cloudy with patchy smoke and a slight (20%) chance of showers Monday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night.
• highs 86-88 lows near 60.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday and in the evening, then mostly cloudy with a slight (20%) chance of showers late at night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Thursday and in the evening, just partly cloudy late Thursday night and Friday AM, then sunny and a bit warmer Friday afternoon, mostly clear at night,
• Then sunny Saturday.
• highs 88-78 warming to 86 Friday and Saturday lows 59-57. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with a slight (20%) chance of showers this AM, just mostly cloudy this afternoon, partly cloudy this evening, mostly cloudy with a slight (20%) chance of coastal showers late tonight,
• Mostly cloudy with a slight (20%) chance of coastal showers Monday while a slight (20%) chance of inland showers in the afternoon, a slight (20%) chance of showers Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday and at night.
• highs near 66 lows near 58.
• Mostly cloudy with a slight (20%) chance of showers Wednesday through Thursday, partly cloudy with a slight (20%) chance of showers Thursday evening, just partly cloudy late Thursday night and Friday AM, sunny in the afternoon, mostly clear at night,
• Then mostly sunny and a bit warmer Saturday.
• highs 70-66 warming back to 70 Friday lows near 56. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun today with a slight (20%) chance of showers and thunderstorms this afternoon, mostly cloudy with a slight (20%) chance evening showers and thunderstorms, mostly cloudy with a (20%) chance of showers late tonight,
• A mix of clouds and sun and a bit warmer Monday with a (30%) chance of showers and thunderstorms in the afternoon, mostly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, a slight (20%) chance of showers late Monday night and Tuesday AM, a slight (20%) chance of showers and thunderstorms and a bit warmer in the afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, then a slight (20%) chance of showers late Tuesday night.
• snow level above 8,000 ft. today through Tuesday night.
• highs 72-78 lows near 49.
• Partly cloudy with a slight (20%) chance of showers Wednesday AM, a slight (20%) chance of showers and thunderstorms and a bit cooler in the afternoon and evening,  a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of AM showers, just a bit warmer with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, partly cloudy with a (30%) chance of evening showers and a slight (20%) chance of thunderstorms, a slight (20%) chance of showers late Thursday night and Friday AM, partly cloudy and a bit warmer in the afternoon, mostly clear at night,
• Then mostly sunny and warmer Saturday.
• snow level above 8,000 ft. Wednesday through Friday, then free air freezing level above 8,000 ft.
• highs 74-63 warming to 72 Saturday lows near 45.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What is the “dew point?”  Here is the correct answer.The Dew Point (Abbrev. DWPT) – A measure of atmospheric moisture. It is the temperature to which air must be cooled in order to reach saturation (assuming air pressure and moisture content are constant). A higher dew point indicates more moisture present in the air. It is sometimes referred to as Dew Point Temperature, and sometimes written as one word (Dewpoint). I’ll have a new weekly weather quiz question for you starting Monday. Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving in behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that is leaving us. A frontal system will push in between Sunday and Monday (position shown is Monday) bringing more clouds and a continued chance of precipitation.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 16 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 4 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FROM 11 AM SUNDAY UNTIL 11 PM TUESDAY FOR THUNDERSTORMS WITH ABUNDANT LIGHTNING FOR THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, AND THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy tonight and Sunday AM, partly cloudy in the afternoon and evening, mostly cloudy late Sunday night,
• A mix of clouds and sun with a slight (20%) chance of showers Monday afternoon, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late at night,
• A mix of clouds and sun with a slight (20%) chance of showers and a bit warmer Tuesday, partly cloudy with a slight (20%) chance of evening showers, then mostly cloudy with a slight (20%) chance of showers late Tuesday night.
• lows 58-60 cooling back to 58 Tuesday night highs 85-87.
• Partly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday and in the evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a (30%) chance of afternoon showers, partly cloudy with a (30%) chance of evening showers, a slight (20%) chance of showers late Thursday night,
• A slight (20%) chance of AM showers, just partly cloudy and a bit warmer Friday and Friday night,
• Then mostly sunny and warmer Saturday.
• highs 84-77 warming to 84 Saturday lows 56-53. (seasonal averages high 84 low 52)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with areas of smoke this evening, mostly cloudy and hazy with patchy smoke late tonight,
• Mostly cloudy with patchy smoke Sunday and a slight (20%) chance of AM showers, partly cloudy and hazy with more patchy smoke in the afternoon and  Sunday night,
• Partly cloudy with patchy smoke and a slight (20%) chance of thunderstorms Monday afternoon, mostly cloudy with patchy smoke and a slight (20%) chance of showers Monday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night.
• lows near 60 highs 86-88.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday and in the evening, then mostly cloudy with a slight (20%) chance of showers late at night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Thursday and in the evening, just partly cloudy late Thursday night and Friday AM, then sunny and a bit warmer Friday afternoon, mostly clear at night,
• Then sunny Saturday.
• highs 88-78 warming to 86 Friday and Saturday lows 59-57. (seasonal averages high 86 low 56)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with a slight (20%) chance of coastal showers tonight,
• Mostly cloudy with a slight (20%) chance of showers Sunday AM, just mostly cloudy in the afternoon, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of coastal showers late Sunday night,
• Mostly cloudy with a slight (20%) chance of coastal showers Monday while a slight (20%) chance of inland showers in the afternoon, a slight (20%) chance of showers Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday and at night.
• lows 58-56 highs near 66.
• Mostly cloudy with a slight (20%) chance of showers Wednesday through Thursday, partly cloudy with a slight (20%) chance of showers Thursday evening, just partly cloudy late Thursday night and Friday AM, sunny in the afternoon, mostly clear at night,
• Then mostly sunny and a bit warmer Saturday.
• highs 70-66 warming back to 70 Friday lows near 56. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy this evening, mostly cloudy late tonight,
• A mix of clouds and sun Sunday with a slight (20%) chance of showers and thunderstorms in the afternoon, mostly cloudy with a slight (20%) chance evening showers and thunderstorms, mostly cloudy with a (20%) chance of showers late Sunday night,
• A mix of clouds and sun and a bit warmer Monday with a (30%) chance of showers and thunderstorms in the afternoon, mostly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, a slight (20%) chance of showers late Monday night and Tuesday AM, a slight (20%) chance of showers and thunderstorms and a bit warmer in the afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, then a slight (20%) chance of showers late Tuesday night.
• free air freezing level 12,000 ft. tonight, then snow level above 8,000 ft. Sunday through Tuesday night.
• lows 47-49 highs 72-78.
• Partly cloudy with a slight (20%) chance of showers Wednesday AM, a slight (20%) chance of showers and thunderstorms and a bit cooler in the afternoon and evening,  a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of AM showers, just a bit warmer with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, partly cloudy with a (30%) chance of evening showers and a slight (20%) chance of thunderstorms, a slight (20%) chance of showers late Thursday night and Friday AM,  partly cloudy and a bit warmer in the afternoon, mostly clear at night,
• Then mostly sunny and warmer Saturday.
• snow level above 8,000 ft. Wednesday through Friday, then free air freezing level above 8,000 ft.
• highs 74-63 warming to 72 Saturday lows near 45.

_______________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What is the “dew point?”  Here is the correct answer.The Dew Point (Abbrev. DWPT) – A measure of atmospheric moisture. It is the temperature to which air must be cooled in order to reach saturation (assuming air pressure and moisture content are constant). A higher dew point indicates more moisture present in the air. It is sometimes referred to as Dew Point Temperature, and sometimes written as one word (Dewpoint). I’ll have a new weekly weather quiz question for you starting Monday. Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving in behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that is leaving us. A frontal system will push in between Sunday and Monday (position shown is Monday) bringing more clouds and a continued chance of precipitation.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 14 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 14 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

____________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy and cooler today, mostly cloudy tonight and Sunday AM, a mix of clouds and sun and a bit warmer in the afternoon, partly cloudy in the evening, mostly cloudy late Sunday night,
• A mix of clouds and sun and slightly cooler Monday, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, then mostly cloudy with a slight (20%) chance of showers late at night.
• highs 82-85 cooling to 83 Monday night lows near 58.
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Tuesday, a slight (20%) chance of showers Tuesday night,
• A slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer Wednesday with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, partly cloudy with a (30%) chance of evening showers and thunderstorms, mostly cloudy with a (30%) chance of showers late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a (30%) chance of showers, partly cloudy with a (30%) chance of showers evening showers, a slight (20%) chance of showers late at night,
• A slight (20%) chance of AM showers, then just partly cloudy and a bit warmer Friday afternoon.
• highs 84-78 warming to 82 Friday lows 58-55. (seasonal averages high 84 low 52)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with patchy smoke this AM, sunny and a bit cooler with patchy smoke this afternoon and evening, mostly cloudy with patchy smoke and a slight (20%) chance of rain late tonight,
• Mostly cloudy with patchy smoke Sunday and a slight (20%) chance of AM showers Sunday, partly cloudy with more patchy smoke in the evening, mostly cloudy with patchy smoke late Sunday night.
• highs 84-86 lows near 60.
• Partly cloudy with patchy smoke and a slight (20%) chance of showers and Monday, mostly cloudy with patchy smoke and a slight (20%) chance of evening thunderstorms, a slight (20%) chance of showers with more patchy smoke late Monday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of thunderstorms Tuesday and Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers Wednesday through Thursday AM, a (30%) chance of thunderstorms and a bit cooler in the afternoon and evening, just partly cloudy late Thursday night and Friday AM, then mostly sunny and warmer Friday afternoon.
• highs 88-78 warming to 86 Friday lows near 58. (seasonal averages high 86 low 56)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy today, mostly cloudy with a slight (20%) chance of coastal rain tonight while a slight (20%) chance of rain inland late tonight (under 0.10 in. of rain possible),
• Mostly cloudy Sunday, mostly cloudy with a slight (20%) chance of coastal showers late Sunday night,
• Then mostly cloudy with a slight (20%) chance of showers Monday and Monday night.
• highs near 66 lows 58-56.
• Mostly cloudy with a slight (20%) chance of showers Tuesday (a bit warmer) through Wednesday night,
• Mostly cloudy with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Thursday night and Friday AM, then mostly sunny Friday afternoon.
• highs 70-66 warming back to 70 Friday lows near 56. (seasonal averages high 65 low 53)

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Forecast for the Cascades in Lane County:

• Mostly sunny and a bit cooler today, partly cloudy this evening, mostly cloudy late tonight,
• A mix of clouds and sun and a bit cooler Sunday with a slight (20%) chance of showers and thunderstorms and a bit warmer in the afternoon, partly cloudy with a slight (20%) chance evening showers and thunderstorms, mostly cloudy with a (20%) chance of showers late Sunday night,
• A mix of clouds and sun Monday with a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, mostly cloudy with a slight (20%) chance of showers late Monday night.
• free air freezing level 12,000 ft. today and tonight, then snow level above 8,000 ft. Sunday through Monday night.
• highs 72-74 lows near 48.
• Mostly cloudy with a slight (20%) chance of AM showers Tuesday, a bit cooler with a slight (20%) chance of showers and thunderstorms in the afternoon and evening, a slight (20%) chance of showers late Tuesday night,
• A mix of clouds and sun Wednesday with a slight (20%) chance of AM showers, a bit warmer with a (40%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, partly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms in the evening, a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of AM showers, just a bit warmer with a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a (30%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late Thursday night and Friday AM, then partly cloudy and warmer Friday afternoon.
• snow level above 8,000 ft. Tuesday through Friday.
• highs 74-65 warming to 70 Friday lows 48-44 warming back to 48 Thursday night.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

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Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

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Here is my new weekly weather quiz question. What is the “dew point?”  Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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An upper level low pressure trough (Shaded “U” shape with blue arrows) is going to follow closely behind the high pressure ridge (Shaded “Arch” shape with blue arrows) that was over us. A frontal system will move in between Sunday and Monday (position shown is Monday) bringing more clouds and a continued chance of precipitation.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 31 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 32 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Clear this evening, mostly cloudy late tonight and Saturday (cooler), partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late Saturday night and Sunday AM, partly cloudy and a bit cooler with a slight (20%) chance of showers in the afternoon, partly cloudy in the evening, mostly cloudy late Sunday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Monday, partly cloudy with a slight (20%) chance of evening showers, then mostly cloudy with a (30%) chance of evening showers late at night.
• lows near 60 highs 75-80.
• A mix of clouds and sun and a bit cooler Tuesday with a (30%) chance of AM showers, a bit cooler with a slight (20%) chance of afternoon showers, partly cloudy with a slight (20%) chance of showers in the evening, mostly cloudy with a slight (20%) chance of showers late Tuesday night,
• A mix of clouds and sun and a bit warmer Wednesday with a slight (20%) chance of AM showers, a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, mostly cloudy with a (30%) chance of showers late Wednesday night,
• Then a mix of clouds and sun and just a bit cooler Thursday with a (30%) chance of showers, partly cloudy with a (30%) chance of showers at night,
• Then just partly cloudy and a bit warmer Friday.
• highs 75-80 cooling to 76 Thursday warming to near 80 Friday lows near 55. (seasonal averages high 84 low 52)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly clear with patchy smoke this evening, partly cloudy with more patchy smoke late tonight,
• Mostly cloudy with patchy smoke Saturday AM, partly cloudy and a bit cooler with patchy smoke in the afternoon and evening, mostly cloudy with patchy smoke and a slight (20%) chance of showers late Saturday night,
• Mostly cloudy with patchy smoke and a slight (20%) chance of showers Sunday AM, partly cloudy with more patchy smoke and a slight (20%) chance of showers in the evening, mostly cloudy with patchy smoke and a slight (20%) chance of showers late Sunday night.
• highs 85-83 lows near 60.
• Mostly cloudy with patchy smoke and a slight (20%) chance of showers and Monday AM, partly cloudy and a bit cooler with patchy smoke and a slight (20%) chance of showers in the afternoon, mostly cloudy with patchy smoke and a slight (20%) chance of evening thunderstorms, a slight (20%) chance of showers with more patchy smoke late Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday through Thursday, then partly cloudy with a slight (20%) chance of showers Thursday evening, then just partly cloudy late Thursday night and partly cloudy and warmer Friday.
• highs 82-87 lows near 58. (seasonal averages high 86 low 56)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Partly cloudy this evening with a slight (20%) chance of isolated coastal thunderstorms and mostly cloudy late tonight while partly cloudy this evening inland and mostly cloudy late tonight,
• Mostly cloudy Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night (under 0.10 in. of rain possible) and Sunday AM, mostly cloudy in the afternoon, partly cloudy inland in the evening and mostly cloudy with a slight (20%) chance of showers late Sunday night while a slight (20%) chance of coastal showers late Sunday night,
• Then mostly cloudy with a slight (20%) chance of showers Monday and Monday night.
• lows 58-56 highs near 66.
• Mostly cloudy with a slight (20%) chance of showers Tuesday (a bit warmer) through Thursday (a bit cooler) evening, then just partly cloudy late Thursday night and Friday.
• highs 70-66 warming back to 70 Friday lows near 56. (seasonal averages high 65 low 53)

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• Partly cloudy and a bit cooler Saturday and in the evening, mostly cloudy with a slight (20%) chance of showers late at night,
• A mix of clouds and sun and a bit cooler Sunday with a slight (20%) chance of AM showers, a slight (20%) chance of showers and thunderstorms and a bit warmer in the afternoon, partly cloudy with a slight (20%) chance evening showers and thunderstorms, mostly cloudy with a (20%) chance of showers late Sunday night,
• A mix of clouds and sun Monday with a slight (20%) chance of AM showers, a slight (20%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, mostly cloudy with a (30%) chance of showers late Monday night.
• free air freezing level 13,000 ft. tonight, 12,000 ft. Saturday, then snow level above 8,000 ft. tonight through Monday night.
• lows 46-48 highs 73-69.
• A mix of clouds and sun and cooler Tuesday with a (30%) chance of AM showers, a bit cooler with a slight (20%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) chance of showers an thunderstorms in the evening, a slight (20%) chance of showers late Tuesday night,
• A mix of clouds and sun with a 40% chance of showers Wednesday AM, a bit warmer with a (40%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, partly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms in the evening, a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun and just a bit cooler Thursday with a slight (20%) chance of AM showers, just a bit warmer with a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a (30%) chance of evening showers and thunderstorms, just partly cloudy Thursday night and Friday AM, then mostly sunny and warmer Friday.
• snow level above 8,000 ft. Tuesday through Thursday night, then free air freezing level 11,000 ft. Friday.
• highs 62-66 cooling to 64 Thursday warming to 70 Friday lows 44-47.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my new weekly weather quiz question. What is the “dew point?”  Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low pressure trough (Shaded “U” shape with blue arrows) is moving away as short-lived high pressure moves in for a couple of days of warmer weather. A frontal system will move in Sunday cooling us down and possibly bringing some rain.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 70 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A HEALTH ADVISORY HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Clear tonight,
• Mostly sunny and just a bit warmer Friday, partly cloudy at night,
  A mix of clouds and sun and bit a cooler Saturday, mostly cloudy with a good (50%) chance of evening rain, a slight (20%) chance of rain late Saturday night,
• A mix of clouds and sun Sunday with a (30%) chance of AM showers, a slight (20%) chance of afternoon showers, then mostly cloudy with a (30%) chance of showers Sunday night.
• lows 53-58 highs 85-78.
• A mix of clouds and sun with a (30%) chance of showers Monday, becoming mostly cloudy with a (30%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night,
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of evening showers, then just partly cloudy and a bit warmer late Tuesday night through Thursday.
• highs 76-84 lows 56-54. (seasonal averages high 84 low 52)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly clear with patchy smoke tonight,
• Sunny and a bit warmer with patchy smoke Friday, mostly clear in the evening, becoming mostly cloudy with patchy smoke late Friday night and Saturday AM, partly cloudy and a bit cooler in the afternoon, partly cloudy with patchy smoke and a slight (20%) chance of showers in the evening, mostly cloudy with patchy smoke and a slight (20%) chance of showers late Saturday night,
• Mostly cloudy Sunday with patchy smoke, a slight (20%) chance of showers Sunday AM, just mostly cloudy with patchy smoke in the afternoon, more patchy smoke with a slight (20%) chance of showers  Sunday night.
• lows 57-60 highs 88-85.
• Mostly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms Monday AM, patchy smoke a slight (20%) chance of thunderstorms in the afternoon, a slight (20%) chance of showers with more patchy smoke Monday night,
• Partly cloudy with patchy smoke and a slight (20%) chance of AM showers and thunderstorms, a slight (20%) chance of thunderstorms in the afternoon and at night Tuesday through Wednesday,
• Mostly cloudy with patchy smoke in the AM, partly cloudy and warmer with continuing patchy smoke and a slight (20%) chance of thunderstorms Thursday afternoon.
• highs 82-86 lows near 60. (seasonal averages high 86 low 56)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly clear this evening, partly cloudy late tonight and Friday AM, sunny in the afternoon, partly cloudy in the evening with a slight (20%) chance of evening coastal thunderstorms, mostly cloudy late Friday night,
• Mostly cloudy with a slight (20%) chance of coastal showers Saturday AM, just mostly cloudy in the afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers at night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of showers Sunday and Sunday night.
• lows 56-58 highs near 67.
• Mostly cloudy with a slight (20%) chance of showers Monday and in the evening, then just partly cloudy late Monday night through Thursday.
• highs near 66 lows near 56. (seasonal averages high 65 low 53)

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• Mostly sunny Friday, mostly clear at night,
• Partly cloudy and a bit cooler Saturday, a slight (20%) chance of showers in the evening, becoming mostly cloudy with a (40%) chance of rain late Saturday night,
• A mix of clouds and sun and a bit cooler Sunday with a (40%) chance of AM showers, a slight (20%) chance of showers and a bit warmer in the afternoon, a (30%) chance of showers Sunday night.
• free air freezing level 14,000 ft. tonight, 13,000 ft. Friday through Saturday, then snow level above 8,000 ft. Saturday night through Sunday night.
• lows 44-48 highs 74-66.
• A mix of clouds and sun with a (30%) chance of showers Monday AM, a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, mostly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the evening, partly cloudy with a slight (20%) chance of showers late Monday night,
• A mix of clouds and sun Tuesday with a (30%) chance of AM showers, a slight (20%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late Tuesday night and Wednesday AM, a bit warmer with a slight (20%) chance of afternoon and evening showers and thunderstorms, a slight (20%) chance of showers late Wednesday night,
• Partly cloudy with a slight chance of AM showers, then just a bit warmer with a slight (20%) chance of showers and thunderstorms Thursday afternoon.
• snow level above 8,000 ft. Monday through Thursday.
• highs 66-69 lows 48-45.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

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