Here is my weekly weather quiz question for the last time. What is a “Back-building thunderstorm?”  Here is the correct answer. A Back-building Thunderstorm is a  thunderstorm in which new development takes place on the upwind side (usually the west or southwest side), such that the storm seems to remain stationary or propagate in a backward direction. 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 (Shaded “U” shape with blue arrows) that has been controlling our weather is being replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again. The low is moving eastward as the high pressure takes over for the most of long Labor Day Holiday Weekend. Weather will be good, but chilly for the Duck game this evening. There’s just a slight chance of rain for Sunday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 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 24 in the Good category measuring Ozone.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 tonight,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain Sunday, partly cloudy at night and Monday AM, mostly sunny and a bit warmer Monday (Labor Day), mostly clear Monday night,
• Partly cloudy and warmer Tuesday, then mostly clear at night.
• lows 46-52 highs 72-82.
• Mostly sunny and warmer Wednesday, Thursday and Friday, mostly clear each night,
• Then sunny and warmer Saturday.
• highs 82-89 lows 50-53. (seasonal averages high 80 low 49)

_____

Your College Football Weather Forecast:

Today- Ducks vs Eastern Washington – Autzen Stadium- Kickoff: 5 pm (PDT)

Forecast: Temperature near 70 and falling, mostly sunny late this afternoon then mostly clear this evening and at night, wind: W 5 mph. Remember, after the sun goes down it will get chilly. Dress appropriately.

________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly clear tonight,
• Sunny with a slight (20%) chance of showers Sunday AM, partly cloudy in the  afternoon, mostly clear in the evening, partly cloudy at night and Monday AM (Labor Day), sunny and a bit warmer in the afternoon, clear Monday night,
• Mostly sunny and a bit warmer Tuesday, then mostly clear at night.
• lows 52-55 cooling back to 52 Tuesday night highs 77-84.
• Mostly sunny and a bit warmer Wednesday, clear at night,
• Then sunny and warmer Thursday, Friday and Saturday, clear Thursday night and Friday night.
• highs 86-90 lows 52-55. (seasonal averages high 82 low 53)

________________

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

• Mostly clear tonight,
• Partly cloudy with a slight (20%) chance of inland AM showers, a slight (20%) chance of coastal showers Sunday, partly cloudy in the evening, mostly cloudy late at night,
• Mostly cloudy in the AM, sunny and a bit cooler Monday afternoon (Labor Day), mostly clear in the evening, partly cloudy at night,
• Mostly sunny and a bit warmer Tuesday, then mostly clear at night.
• lows 52-54 cooling back to 52 Tuesday night highs 67- 65 warming back to 67 Tuesday.
• Mostly sunny and a bit warmer Wednesday and Thursday, mostly clear each night,
• Then sunny and a bit cooler Friday and Saturday, clear at night.
• highs 69-64 lows 50-52. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• Partly cloudy tonight through Monday AM (Labor Day), mostly sunny and warmer in the afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Tuesday, then mostly clear at night.
• free air freezing level 9,000 ft. tonight, 10,000 ft. Sunday, 11,000 ft. Sunday night and Monday, 13,000 ft. Monday night and Tuesday, then 14,000 ft. Tuesday night.
• lows 36-43 highs 60-72.
• Mostly sunny Wednesday, mostly clear at night,
• Then sunny and warmer Thursday, Friday and Saturday, clear each night.
• free air freezing level 14,000 ft.Wednesday through Thursday, then 15,000 ft. Thursday night through Saturday.
• highs 70-82 lows 46-50.

_______________

**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 a “Back-building thunderstorm?”  Here is the correct answer. A Back-building Thunderstorm is a  thunderstorm in which new development takes place on the upwind side (usually the west or southwest side), such that the storm seems to remain stationary or propagate in a backward direction. 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 (Shaded “U” shape with blue arrows) that has been controlling our weather is being replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again. The low is moving eastward as the high pressure takes over for the long Labor Day Holiday Weekend. Weather will be good, but chilly for the Duck game this evening.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

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

Cottage Grove: The Air Quality Index is 23 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 with patchy fog this AM, mostly sunny and warmer this afternoon, mostly clear tonight,
• A mix of clouds and sun Sunday, partly cloudy at night,
• Mostly sunny and a bit warmer Monday (Labor Day), then partly cloudy Monday night.
• highs 73-76 lows 46-50.
• Partly cloudy Tuesday AM, mostly sunny and a bit warmer in the afternoon, mostly clear at night,
• Then mostly sunny Wednesday, Thursday and Friday, mostly clear each night.
• highs 82-84 lows near 52. (seasonal averages high 80 low 49)

_____

Your College Football Weather Forecast:

Today- Ducks vs Eastern Washington – Autzen Stadium- Kickoff: 5 pm (PDT)

Forecast: Temperature near 70 and falling, mostly sunny late in the afternoon then mostly clear in the evening and at night, wind: W 5-10 mph shifting NW 5-10 mph at night. Remember, after the sun goes down it will get chilly. Dress appropriately.

________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy and warmer this afternoon, mostly clear tonight,
• Partly cloudy and warmer Sunday and in the evening, clear at night,
• Sunny and a bit warmer Monday (Labor Day), then clear Monday night.
• highs 73-82 lows 48-53 cooling to 50 Monday night.
• Mostly sunny and a bit warmer Tuesday, mostly clear at night,
• Sunny and a bit warmer Wednesday and Thursday, clear at night,
• Then sunny and a bit warmer Friday.
• highs 85-90 lows near 54. (seasonal averages high 82 low 53)

________________

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

• Partly cloudy this AM, sunny this afternoon, mostly clear this evening, partly cloudy tonight through Sunday night,
• Sunny Monday (Labor Day), then clear at night.
• highs near 67 lows near 52.
• Mostly sunny Tuesday and Wednesday, mostly clear at night,
• Sunny and a bit warmer Thursday, mostly clear at night,
• Then mostly sunny Friday.
• highs near 68 lows 53-55. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun today with a slight (20%) chance of AM showers, partly cloudy tonight,
• Mostly sunny Sunday AM, party cloudy in the afternoon and Sunday night,
• Mostly sunny and warmer Monday (Labor Day), then mostly clear at night.
• snow level 5,500 ft. today, free air freezing level 9,000 ft. tonight, 10,000 ft. Sunday, 11,000 ft. Sunday night, 9,000 ft. Monday, then 12,000 ft. Monday night.
• highs 58-65 lows 37-42.
• Mostly sunny and a bit warmer Tuesday, Wednesday and Thursday, mostly clear each night,
• Then sunny Friday.
• free air freezing level 12,000 ft. Tuesday, 13,000 ft. Tuesday night and Wednesday, 12,000 ft. Wednesday night, then 13,000 ft. Thursday through Friday.
• highs 70-74 cooling to 72 Friday lows 45-48 cooling back to 45 Thursday night.

_______________

**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. What is a “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) that has been controlling our weather is being replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again. The low is moving southward through Oregon bringing the chance of showers and thunderstorms yet this evening then the high pressure takes over for the long Labor Day Holiday Weekend. Weather will be good, but chilly for the Duck game Saturday evening.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 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 24 in the Good category measuring Ozone.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 with a (40%) chance of showers and a slight (20%) chance of thunderstorms this evening, a (30%) chance of showers through late evening, partly cloudy with patchy fog late tonight and Saturday AM, mostly sunny and warmer in the afternoon, mostly clear Saturday night,
• A mix of clouds and sun Sunday, partly cloudy at night,
• Mostly sunny and a bit warmer Monday (Labor Day), then partly cloudy Monday night.
• lows 45-50 highs 73-76.
• Partly cloudy Tuesday AM, mostly sunny and a bit warmer in the afternoon, mostly clear at night,
• Then mostly sunny Wednesday, Thursday and Friday, mostly clear each night.
• highs 82-84 lows near 52. (seasonal averages high 80 low 49)

_____

Your College Football Weather Forecast:

Saturday- Ducks vs Eastern Washington – Autzen Stadium- Kickoff: 5 pm (PDT)

Forecast: Temperature near 70 and falling, mostly sunny late in the afternoon then mostly clear in the evening and at night, wind: W 5-10 mph shifting NW 5-10 mph at night. Remember, after the sun goes down it will get chilly. Dress appropriately.

________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of thunderstorms this evening, mostly cloudy with a slight (20%) chance of isolated showers late tonight,
• Partly cloudy and warmer Saturday afternoon, mostly clear Saturday night,
• Partly cloudy and warmer Sunday and in the evening, clear at night,
• Sunny and a bit warmer Monday (Labor Day), then clear Monday night.
• lows 47-53 cooling to 50 Monday night highs 73-82.
• Mostly sunny and a bit warmer Tuesday, mostly clear at night,
• Sunny and a bit warmer Wednesday and Thursday, clear at night,
• Then sunny and a bit warmer Friday.
• highs 85-90 lows near 54. (seasonal averages high 82 low 53)

________________

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

• Partly cloudy tonight with a slight (20%) chance of inland evening showers,
• Partly cloudy Saturday AM, sunny in the afternoon, mostly clear in the evening, partly cloudy Saturday night through Sunday night,
• Sunny Monday (Labor Day), then clear at night.
• lows near 52 highs near 67.
• Mostly sunny Tuesday and Wednesday, mostly clear at night,
• Sunny and a bit warmer Thursday, mostly clear at night,
• Then mostly sunny Friday.
• highs near 68 lows 53-55. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• Mostly cloudy with showers likely (70%) and a slight (20%) chance of thunderstorms this evening, partly cloudy with a good (50%) chance of showers late tonight,
• A mix of clouds and sun Saturday with a slight (20%) chance of AM showers, partly cloudy Saturday night,
• Mostly sunny Sunday AM, party cloudy in the afternoon and Sunday night,
• Mostly sunny and warmer Monday (Labor Day), then mostly clear at night.
• snow level 6,000 ft. tonight, 5,500 ft. Saturday, free air freezing level 9,000 ft. Saturday night, 10,000 ft. Sunday, 11,000 ft. Sunday night, 9,000 ft. Monday, then 12,000 ft. Monday night.
• lows 37-42 highs 58-65.
• Mostly sunny and a bit warmer Tuesday, Wednesday and Thursday, mostly clear each night,
• Then sunny Friday.
• free air freezing level 12,000 ft. Tuesday, 13,000 ft. Tuesday night and Wednesday, 12,000 ft. Wednesday night, then 13,000 ft. Thursday through Friday.
• highs 70-74 cooling to 72 Friday lows 45-48 cooling back to 45 Thursday night.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) that has been controlling our weather will be replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again, but not quite yet. The low will move southward through Oregon bring the chance of showers and thunderstorms today, then the high pressure takes over for most of the long Labor Day Holiday Weekend with the exception of Sunday. Weather will be good, but chilly for the Duck game Saturday evening. There is a slight chance of a shower or thunderstorm, though, for the Beaver game this evening.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 26 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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:

• A mix of clouds and sun today with a slight (20%) chance of AM showers, a (40%) chance of showers and a slight (20%) chance of thunderstorms this afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms this evening, partly cloudy late tonight and Saturday AM, mostly sunny and warmer in the afternoon, partly cloudy Saturday night,
• A mix of clouds and sun with a slight (20%) chance of showers Sunday afternoon, mostly cloudy in the evening, then partly cloudy late Sunday night.
• highs 70-75 lows 45-50.
• Partly cloudy in the AM, mostly sunny and a bit warmer Monday afternoon (Labor Day), partly cloudy Monday night through Wednesday AM, mostly sunny in the afternoon, mostly clear at night,
• Mostly sunny Thursday AM, then partly cloudy and a bit cooler in the afternoon.
• highs 77-83 lows 48-53. (seasonal averages high 80 low 49)

_____

Your College Football Weather Forecast:

Friday – Beavers vs Weber State – Reser Stadium- Kickoff: 5 pm (PDT)

Forecast: Temperature near 70 and falling, A mix of clouds and sun, slight chance of afternoon and evening showers and thunderstorms, then just partly cloudy, wind: N 5-10 mph. Remember, after the sun goes down it will get chilly. Dress appropriately.

_____

Saturday- Ducks vs Eastern Washington – Autzen Stadium- Kickoff: 5 pm (PDT)

Forecast: Temperature near 70 and falling, mostly sunny late in the afternoon then partly cloudy in the evening and at night, wind: W 5-10 mph. Remember, after the sun goes down it will get chilly. Dress appropriately.

________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of showers this AM, a (30%) chance of showers and a slight (20%) chance of afternoon thunderstorms, partly cloudy with a slight (20%) chance of showers and thunderstorms this evening, mostly cloudy with a slight (20%) chance of showers late tonight,
• Partly cloudy and warmer Saturday afternoon, mostly clear Saturday night,
• Partly cloudy and  warmer Sunday, then partly cloudy at night.
• highs 70-78 lows 48-54.
• Partly cloudy in the AM, sunny Monday afternoon (Labor Day), clear Monday night,
• Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear at night,
• Then sunny and a bit warmer Thursday.
• highs 82-87 cooling to 85 Thursday lows 50-53. (seasonal averages high 82 low 54)

________________

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

• Mostly cloudy with a slight (20%) chance of showers this AM, partly cloudy with a slight (20%) chance of showers and isolated thunderstorms this afternoon, partly cloudy in the evening with a slight (20%) chance of showers, just partly cloudy late tonight and Saturday, mostly clear in the evening, then partly cloudy Saturday night through Sunday night.
• highs 64-66 lows 52-54.
• Partly cloudy in the AM, sunny Monday afternoon (Labor Day), clear at night,
• Mostly sunny Tuesday and Wednesday, mostly clear at night,
• Then sunny and a bit warmer Thursday.
• highs 65-70 lows 54-56. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun today with a slight (20%) chance of AM showers, showers and a slight (20%) chance of thunderstorms this afternoon (0.25 in. of rain possible, more in storms), mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms in the evening, partly cloudy with a good (50%) chance of showers late tonight,
• Then partly cloudy and with a slight (20%) chance of showers and warmer Saturday, partly cloudy Saturday night through Sunday night.
• snow level 6,500 ft. today and tonight, 5,500 ft. Saturday, free air freezing level 9,000 ft. Saturday night, 10,000 ft. Sunday, then 11,000 ft. Sunday night.
• highs 52-64 lows 37-40.
• Partly cloudy in the AM, mostly sunny and warmer Monday afternoon (Labor Day), mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, Wednesday and Thursday, mostly clear each night.
• free air freezing level 9,000 ft. Monday, 12,000 ft. Monday night, then 13,000 ft. Tuesday through Thursday.
• highs 64-70 lows 43-48.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) that has been controlling our weather will be replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again, but not quite yet. The low will move southward through Oregon bring the slight chance of showers and thunderstorms Friday, then the high pressure takes over for the long Labor Day Holiday Weekend. Weather will be good, but chilly for the Duck game Saturday evening. There is a slight chance of a shower or thunderstorm though for the Beaver game Friday evening.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 26 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 25 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 tonight,
• A mix of clouds and sun Friday 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, partly cloudy late Friday night and Saturday AM, mostly sunny and warmer in the afternoon, partly cloudy Saturday night,
• A mix of clouds and sun with a slight (20%) chance of showers Sunday afternoon, mostly cloudy in the evening, then partly cloudy late Sunday night.
• lows 46-50 highs 70-75.
• Partly cloudy in the AM, mostly sunny and a bit warmer Monday afternoon (Labor Day), partly cloudy Monday night through Wednesday AM, mostly sunny in the afternoon, mostly clear at night,
• Mostly sunny Thursday AM, then partly cloudy and a bit cooler in the afternoon.
• highs 77-83 cooling to 82 Thursday lows 48-53. (seasonal averages high 80 low 49)

________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly clear this evening, partly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of showers Friday AM, a (30%) chance of showers and a slight (20%) chance of afternoon thunderstorms,  partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, mostly cloudy with a slight (20%) chance of showers late Friday night,
• Partly cloudy in the AM, sunny and warmer Saturday afternoon, mostly clear Saturday night,
• Partly cloudy and  warmer Sunday, then mostly clear at night.
• lows 48-54 highs 70-80.
• Mostly sunny Monday (Labor Day), mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear at night,
• Then sunny and a bit warmer Thursday.
• highs 82-88 lows 52-57. (seasonal averages high 82 low 54)

________________

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

• Mostly clear this evening, mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy with a slight (20%) chance of showers Friday afternoon, partly cloudy in the evening with a slight (20%) chance of showers, just partly cloudy late Friday night and Saturday AM, sunny in the afternoon, mostly clear in the evening, then partly cloudy Saturday night through Sunday night.
• lows 52-54 highs 64-66.
• Partly cloudy in the AM, sunny Monday afternoon (Labor Day), clear at night,
• Sunny Tuesday, mostly clear at night,
• Mostly sunny Wednesday, clear Wednesday night,
• Then sunny and a bit warmer Thursday.
• highs 65-70 lows 54-56. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• A mix of clouds and sun Friday with a slight (20%) chance of AM showers, showers and a slight (20%) chance of thunderstorms Friday afternoon (0.25 in. of rain possible, more in storms), mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of showers and thunderstorms in the evening, partly cloudy with a good (50%) chance of showers late Friday night,
  Then partly cloudy and warmer Saturday through Sunday night.
• free air freezing level 8,000 ft. tonight, snow level 6,500 ft. Friday and Friday night, free air freezing level 7,500 ft. Saturday, 9,000 ft. Saturday night, 10,000 ft. Sunday, then 11,000 ft. Sunday night.
• lows 34-40 highs 52-64.
• Partly cloudy in the AM, mostly sunny and warmer Monday afternoon (Labor Day), mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, Wednesday and Thursday, partly cloudy Tuesday night, mostly clear Wednesday night.
• free air freezing level 9,000 ft. Monday, 10,000 ft. Monday night, 11,000 ft. Tuesday and Tuesday night, then 12,000 ft. Wednesday through Thursday.
• highs 66-70 lows 43-49.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) that has been controlling our weather will be replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again, but not quite yet. The low will move southward through Oregon bring the slight chance of showers and thunderstorms Friday, then the high pressure takes over.

________________

Air Quality Index:

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

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 today and tonight,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers and thunderstorms Friday afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, partly cloudy Friday night and Saturday AM, mostly sunny in the afternoon, then partly cloudy Saturday night.
• highs 72-70 warming to 75 Saturday lows 45-48.
• Partly cloudy Sunday and Sunday night,
• Partly cloudy in the AM, mostly sunny and a bit warmer Monday afternoon (Labor Day), partly cloudy Monday night through Wednesday AM, then mostly sunny in the afternoon.
• highs 76-80 lows 48-50. (seasonal averages high 80 low 49)

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy today, mostly clear this evening, mostly cloudy late tonight,
• Mostly cloudy Friday AM, partly cloudy with a (30%) chance of showers and a slight (20%) chance of afternoon and evening thunderstorms, just partly cloudy Friday night and Saturday (warmer), then mostly clear Saturday night.
• highs 72-76 lows 48-50 cooling back to 48 Saturday.
• Mostly sunny and  warmer Sunday and Monday (Labor Day), mostly clear both nights, then mostly sunny and a bit warmer Tuesday and Wednesday and mostly clear at night.
• highs 80-85 lows 56-52. (seasonal averages high 82 low 54)

________________

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

• Partly cloudy today through this evening, mostly cloudy late tonight,
• Mostly cloudy Friday AM, partly cloudy and warmer in the afternoon and evening with a slight (20%) chance of inland showers, just partly cloudy at night and Saturday, then mostly clear Saturday night.
• highs 57-67 lows 52-54 cooling back to 52 Saturday night.
• Mostly sunny and a bit warmer Sunday and Monday (Labor Day), mostly clear both nights,
• Then partly cloudy Tuesday through Wednesday.
• highs near 65 lows 56-53. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• Mostly sunny this afternoon, partly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of AM showers, a good (50%) chance of showers and a slight (20%) chance of thunderstorms Friday afternoon and evening, partly cloudy with a slight (20%) chance of showers late Friday night,
• Mostly cloudy with a slight (20%) chance of showers Saturday AM, just partly cloudy and a bit warmer Saturday afternoon, mostly clear Saturday night.
• free air freezing level 7,000 ft. rising to 7,500 ft. this afternoon, 8,000 ft. tonight, snow level 6,500 ft. Friday through Saturday afternoon, then free air freezing level 9,000 ft. Saturday night.
• highs 55-53 warming to 58 Saturday lows 34-40.
• Mostly sunny Sunday AM, partly cloudy in the afternoon and at night,
• Mostly sunny Monday (Labor Day), partly cloudy Monday night and Tuesday AM, mostly sunny in the afternoon, partly cloudy at night and Wednesday AM, then mostly sunny Wednesday afternoon.
• free air freezing level 10,000 ft. Sunday, 11,000 ft. Sunday night through Monday night, 12,000 ft. Tuesday and Tuesday night, then 12,000 ft. Wednesday.
• highs 63-66 cooling to 63 Wednesday lows 42-45 cooling back to 42 Tuesday night.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) that has been controlling our weather will be replaced by high pressure (Shaded “Arch” shape with blue arrows) and that means the rain goes away again.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 30 in the Good category measuring Ozone.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 with a slight (20%) chance of evening showers, just partly cloudy late tonight through Thursday night,
• A mix of clouds and sun and a bit cooler Friday, partly cloudy Friday night and Saturday AM, mostly sunny in the afternoon, then partly cloudy Saturday night.
• lows 47-45 warming to 48 Saturday night highs 72-70 warming to 77 Saturday.
• Partly cloudy Sunday and Sunday night,
• Mostly sunny and a bit warmer Monday (Labor Day), then partly cloudy Monday night through Wednesday.
• highs 76-80 lows 48-50. (seasonal averages high 80 low 50)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of showers this evening, partly cloudy late tonight and Thursday, mostly clear in the evening, mostly cloudy at night,
• Mostly cloudy Friday AM, partly cloudy with a slight (20%) chance of afternoon and evening thunderstorms, just partly cloudy Friday night and Saturday (warmer), then mostly clear Saturday night.
• lows 50-48 warming back to 50 Friday night, cooling to 48 Saturday highs 72-76.
• Mostly sunny and  warmer Sunday and Monday (Labor Day), mostly clear both nights, then mostly sunny and a bit warmer Tuesday and Wednesday and mostly clear at night.
• highs 80-85 lows 56-52. (seasonal averages high 82 low 54)

________________

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

• Partly cloudy tonight through Thursday evening, mostly cloudy Thursday night,
• Mostly cloudy Friday AM, partly cloudy and warmer in the afternoon and evening with a slight (20%) chance of showers, just partly cloudy at night and Saturday, then mostly clear Saturday night.
• lows 52-54 cooling back to 52 Saturday night highs 57-67.
• Mostly sunny and a bit warmer Sunday and Monday (Labor Day), mostly clear both nights,
• Then partly cloudy Tuesday through Wednesday.
• highs near 65 lows 56-53. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of showers this evening, partly cloudy late tonight and Thursday AM, mostly sunny in the afternoon, partly cloudy Thursday night,
• Mostly cloudy with a slight (20%) chance of AM showers, a good (50%) chance of showers and a slight (20%) chance of thunderstorms Friday afternoon and evening, partly cloudy with a slight (20%) chance of showers late Friday night,
• Mostly cloudy with a slight (20%) chance of showers Saturday AM, just partly cloudy and a bit warmer Saturday afternoon, mostly clear Saturday night.
• snow level above 7,500 ft. this evening, free air freezing level 7,000 ft. rising to 7,500 ft. Thursday afternoon, 8,000 ft. Thursday night, snow level 6,500 ft. Friday through Saturday afternoon, then free air freezing level 9,000 ft. Saturday night.
• lows 36-34 warming to 40 Saturday highs 55-53 warming to 60 Saturday.
• Mostly sunny Sunday AM, partly cloudy in the afternoon and at night,
• Mostly sunny Monday (Labor Day), party cloudy in the afternoon, partly cloudy Monday night and Tuesday AM, mostly sunny in the afternoon, partly cloudy at night and Wednesday AM, then mostly sunny Wednesday afternoon.
• snow level 7,000 ft. Saturday, free air freezing level 9,000 ft. Saturday night, 10,000 ft. Sunday, 11,000 ft. Sunday night through Monday night, 12,000 ft. Tuesday, 11,000 ft. Tuesday night, then 12,000 ft. Wednesday.
• highs 63-66 cooling to 63 Wednesday lows 42-45 cooling back to 42 Tuesday night.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) continues to control our weather and has sent a frontal system into Oregon that will keep our temperatures cooler than normal and keep the chance for rain with us.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

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

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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:

• A mix of clouds and sun with a good (50%) chance of showers today (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, just partly cloudy and cooler late tonight,
• Partly cloudy Thursday and Thursday night,
• Partly cloudy with a slight (20%) chance of showers Friday afternoon and evening, then just partly cloudy at night.
• highs 72-70 lows 48-45.
• Partly cloudy Saturday AM, mostly sunny in the afternoon, then partly cloudy Saturday night through Monday (Labor Day) continuing through Tuesday.
• highs 74-79 cooling to 50 lows 47-50. (seasonal averages high 80 low 50)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a (30%) chance of showers today (under 0.10 in. of rain possible), partly cloudy this evening, mostly clear late tonight,
• Partly cloudy Thursday AM, sunny in the afternoon, mostly clear in the evening, partly cloudy at night,
• Mostly cloudy Friday AM, partly cloudy with a slight (20%) chance of isolated afternoon and evening thunderstorms, just partly cloudy Friday night.
• highs near 72 lows 50-48.
• Then mostly sunny and  warmer Saturday, Sunday and Monday (Labor Day), mostly clear Saturday night and Sunday night, then partly cloudy Monday night and a bit cooler Tuesday.
• highs 78-84 cooling to near 80 Tuesday lows 52-55. (seasonal averages high 82 low 54)

________________

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

• Mostly cloudy and a bit cooler with a (30%) chance of showers today (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of coastal showers tonight,
• Mostly cloudy with a slight (20%) chance of AM coastal rain Thursday, sunny in the afternoon, mostly clear in the evening, partly cloudy with a slight (20%) chance of showers late Thursday night,
• Mostly cloudy with a slight (20%) chance of coastal rain in the AM, partly cloudy Friday afternoon, and at night.
• highs near 65 lows 52-50.
• Sunny and a bit warmer Saturday, mostly clear in the evening, partly cloudy at night,
• Mostly sunny and a bit warmer Sunday and Monday (Labor Day), mostly clear Sunday night, then partly cloudy Monday night and Tuesday.
• highs 66-68 lows 52-55. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers today (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy and cooler late tonight,
• Mostly sunny Thursday and Thursday night,
• A slight (20%) chance of AM showers, a mix of clouds and sun Friday with a (40%) chance of showers and a slight (20%) chance of thunderstorms and a bit warmer in the afternoon, mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, then partly cloudy with a slight (20%) chance of showers late Friday night.
• snow level above 8,000 ft. falling to 7,500 ft. this afternoon, 7,000 ft. this evening, 6,500 ft. rising to 7,000 ft. Thursday afternoon, then 6,500 ft. Thursday night, 6,500 ft. Friday, then 7,000 ft. Friday night.
• highs 55-57 lows 35-38.
• Partly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer Saturday through Sunday AM, sunny in the afternoon, partly cloudy at night,
• Partly cloudy Monday AM (Labor Day), mostly sunny in the afternoon, then partly cloudy Monday night and a bit cooler Tuesday.
• snow level 7,000 ft. Saturday, free air freezing level 9,000 ft. Saturday night, 10,000 ft. Sunday, 11,000 ft. Sunday night and Monday, 12,000 ft. Monday night, then 11,000 ft. Tuesday.
• highs 57-66 cooling to 62 Tuesday lows 40-44.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) continues to control our weather and has sent a frontal system into Oregon that will keep our temperatures cooler than normal and keep the chance for rain with us.

________________

Air Quality Index:

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

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

Cottage Grove: The Air Quality Index is 29 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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 with a slight (20%) chance of showers this evening, a good (50%) chance of showers late tonight (0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Wednesday (under 0.10 in. of rain possible), partly cloudy and cooler Wednesday night,
• Partly cloudy with a slight (20%) chance of showers Thursday afternoon, just partly cloudy Thursday night and Friday, a slight (20%) chance of showers and thunderstorms Friday evening, then just partly cloudy at night.
• lows 55-45 highs 72-70.
• Partly cloudy Saturday AM, sunny in the afternoon, then partly cloudy Saturday night through Monday (Labor Day) continuing through Tuesday.
• highs 74-79 cooling to 50 lows 47-50. (seasonal averages high 80 low 50)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy this evening, mostly cloudy with a good (50%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of showers Wednesday (under 0.10 in. of rain possible), partly cloudy in the evening, mostly clear late Wednesday night,
• Mostly cloudy Thursday AM, sunny in the afternoon, mostly clear in the evening, partly cloudy with a slight (20%) chance of showers late at night,
• Mostly cloudy Friday AM, partly cloudy with a slight (20%) chance of afternoon thunderstorms, a slight (20%) chance of evening showers, just partly cloudy Friday night.
• lows 57-48 highs near 72.
• Then mostly sunny and  warmer Saturday, Sunday and Monday (Labor Day), mostly clear Saturday night and Sunday night, then partly cloudy Monday night and a bit cooler Tuesday.
• highs 78-84 cooling to near 80 Tuesday lows 52-55. (seasonal averages high 82 low 54)

________________

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

• Mostly cloudy with a slight (20%) chance of coastal showers tonight while a good (50%) chance of inland showers late (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of showers Wednesday (under 0.10 in. of rain possible), mostly clear in the evening, partly cloudy late Wednesday night,
• Mostly cloudy with a slight (20%) chance of AM coastal rain Thursday, sunny in the afternoon, mostly clear in the evening, partly cloudy with a slight (20%) chance of showers late Thursday night,
• Mostly cloudy in the AM, partly cloudy Friday afternoon, partly cloudy with a slight (20%) chance of evening showers,  just partly cloudy at night.
• lows 55-49 highs near 65.
• Sunny and a bit warmer Saturday, mostly clear in the evening, partly cloudy at night,
• Mostly sunny and a bit warmer Sunday and Monday (Labor Day), mostly clear Sunday night, partly cloudy Monday night and Tuesday.
• highs 66-68 lows 52-54. (seasonal averages high 66 low 52).

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a good (50%) chance of showers late tonight (0.10 in. of rain possible),
• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers Wednesday (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy and cooler late Wednesday night,
• Mostly sunny and a bit cooler Thursday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Thursday night,
• A mix of clouds and sun Friday with a (40%) chance of showers and a slight (20%) chance of thunderstorms and a bit warmer in the afternoon, partly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, then just partly cloudy late Friday night.
• snow level above 8,000 ft. tonight, 8,000 ft. falling to 7,500 ft. Wednesday afternoon, 6,000 ft. Wednesday night, 6,500 ft. rising to 7,000 ft. Thursday afternoon, then 6,500 ft. Thursday night, 6,000 ft. Friday, then 6,500 ft. Friday night.
• lows 44-35 warming to 38 Friday night highs 55-57.
• Partly cloudy and a bit warmer Saturday through Monday AM (Labor Day), mostly sunny in the afternoon, then partly cloudy Monday night and a bit cooler Tuesday.
• free air freezing level 8,000 ft. Saturday, 9,000 ft. Saturday night, 11,000 ft. Sunday through Monday, 12,000 ft. Monday night, then 11,000 ft. Tuesday.
• highs 57-66 cooling to 62 Tuesday lows 40-44.

_______________

**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 “Back-building thunderstorm?” 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 (Shaded “U” shape with blue arrows) continues to control our weather and will send a frontal system at us today that will keep our temperatures cooler than normal and keep the chance for rain with us.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

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

Cottage Grove: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• AN AIR QUALITY ALERT HAS BEEN ISSUED UNTIL FURTHER NOTICE FOR CROOK, DESCHUTES, GILLIAM, GRANT, JEFFERSON, MONROE, SHERMAN, UMATILLA, UNION, WILLOWA, WASCO, WHEELER, BENTON AND COLUMBIA COUNTIES IN OREGON.
• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY 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.
• A HEALTH ADVISORY CONTINUES 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:

• Thickening clouds and cooler this afternoon with a slight (20%) chance of showers this evening  (under 0.10 in. of rain possible), mostly cloudy with a good (50%) chance of showers late tonight (under 0.10 in. of rain possible),
• A mix of clouds and sun Wednesday with a good (50%) chance of showers (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, just partly cloudy and cooler late Wednesday night,
• A mix of clouds and sun with a slight (20%) chance of showers Thursday, then partly cloudy Thursday night.
• highs 75-70 lows 54-47.
• A mix of clouds and sun with a (30%) chance of showers and a slight (20%) chance of thunderstorms Friday afternoon, partly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms in the evening, just partly cloudy late Friday night through Sunday night,
• Mostly sunny Monday AM (Labor Day), then partly cloudy and a bit warmer in the afternoon.
• highs 72-80 lows near 48. (seasonal averages high 81 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy today, mostly cloudy with a slight (20%) chance of evening rain, a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of showers Wednesday (under 0.10 in. of rain possible), partly cloudy in the evening, mostly clear late Wednesday night,
• A slight (20%) chance of AM rain, partly cloudy Thursday afternoon, mostly clear in the evening, then partly cloudy late Thursday night.
• highs 79-72 lows 58-46.
• Partly cloudy Friday and Friday night,
• Then mostly sunny and  warmer Saturday, Sunday and Monday (Labor Day), mostly clear each night.
• highs 73-84 lows 49-53. (seasonal averages high 82 low 54)

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

• Mostly cloudy a bit cooler today,  a slight (20%) chance of evening rain, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of showers Wednesday (under 0.10 in. of rain possible), mostly clear in the evening, partly cloudy late Wednesday night,
• Mostly cloudy Thursday AM with a slight (20%) chance of rain, partly cloudy in the afternoon, partly cloudy with a slight (20%) chance of rain late Thursday night.
• highs 69-64 lows 55-50.
• Mostly cloudy with a slight (20%) chance of AM rain, partly cloudy Friday afternoon and at night,
• Mostly sunny and a bit warmer Saturday, mostly lear at night,
• Mostly sunny and a bit warmer Sunday and Monday (Labor Day), mostly clear Sunday night.
• highs 64-68 lows near 52. (seasonal averages high 66 low 52).

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Forecast for the Cascades in Lane County:

• Partly cloudy today, partly cloudy with a slight (20%) chance of evening showers, a good (50%) chance of showers late tonight (0.10 in. of rain possible),
• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers Wednesday (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy and colder late Wednesday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Thursday afternoon and evening, just partly cloudy late Thursday night.
• free air freezing level 13,000 ft. today, snow level above 8,000 ft. tonight,  7,500 ft. Wednesday, 6,500 ft. Wednesday night, 6,000 ft. Thursday, then 7,000 ft. Thursday night.
• highs 63-55 lows 44-36.
• A mix of clouds and sun with a slight (20%) chance of AM showers, a (40%) chance of showers and a slight (20%) chance of thunderstorms and a bit warmer Friday afternoon, mostly cloudy with a good (50%) chance of evening showers and thunderstorms, just partly cloudy late Friday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Saturday afternoon and evening, then partly cloudy and warmer Saturday night through Monday (Labor Day).
• snow level 6,500 ft. Friday and Friday night, 7,000 ft. Saturday, above 8,000 ft. Saturday night, free air freezing level 9,000 ft. Sunday, then 11,000 ft. Sunday night and Monday.
• highs 55-66 lows 38-40.

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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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