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. The Perseid Meteor Shower tonight and Thursday night. It is caused by debris from the comet Swift-Tuttle. For best viewing get away from the city lights and hope for mostly clear skies after Midnight and before Sunrise.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 35 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 33 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).

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Advisories:

• 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:

• Mostly sunny this afternoon, partly cloudy tonight,
• Partly cloudy and just a bit cooler Thursday, partly cloudy with a good (50%) chance of showers in the evening, mostly cloudy with a good (50%) chance of showers late Thursday night and Friday, then just partly cloudy Friday night.
• highs 84-78 lows 58-54.
• Mostly sunny and a bit warmer Sunday, Monday and Tuesday, mostly clear nights.
• highs 82-86 lows near 53. (seasonal averages high 83 low 52)

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Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with patchy smoke today and a bit cooler with a slight (20%) chance of AM thunderstorms, sunny this afternoon, mostly clear in the evening, becoming partly cloudy with more patchy smoke and a slight (20%) chance of showers late tonight,
• Partly cloudy with patchy smoke and a slight (20%) chance of  thunderstorms Thursday afternoon, a (30%) chance of showers late Thursday night,
• Mostly cloudy with a (30%) chance of showers Friday AM, partly cloudy with a (30%) chance of showers in the afternoon, mostly clear at night.
• highs 85-80 lows 65-54.
• 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 85 low 56)

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

• Mostly cloudy today with patchy smoke and a slight (20%) chance of AM thunderstorms, partly cloudy this evening, mostly cloudy with a slight (20%) chance of patchy drizzle late tonight,
• 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.
• highs 64-66 lows near 56.
• 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 slight (20%) chance of showers and thunderstorms and a bit cooler this afternoon and evening, just partly cloudy late tonight,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Thursday afternoon, a (40%) chance of showers and a slight (20%) chance of thunderstorms in the evening, a (30%) chance of thunderstorms late Thursday night,
• A mix of clouds and sun and a bit cooler with a (30%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, a slight (20%) chance of showers and thunderstorms in the afternoon, becoming mostly clear late at night.
• snow level above 8,000 ft. today through Friday, then free air freezing level 11,000 ft. Friday night.
• highs 82-64 lows 48-44.
• Mostly sunny and a bit warmer Saturday, Sunday, Monday and Tuesday, mostly clear each night.
• free air freezing level 11,000 ft. Saturday, 13,000 ft. Saturday night through Monday night, then 14,000 ft. Tuesday.
• 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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