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.

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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.

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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).

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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.

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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)

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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)

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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)

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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.

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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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