Here is my new weekly weather quiz question. What is “Deep Percolation Loss?”  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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The Jet Stream is swinging the air in from the west. A frontal system is poised offshore and will be moving in.  Another in a series of frontal systems will move in by the end of the week.

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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 28 in the Good category measuring Ozone.

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

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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.

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

• Partly cloudy tonight through Thursday evening, mostly cloudy with a slight (20%) chance of rain late Thursday night,
• Cloudy with a good (50%) chance of AM rain, a good (50%) chance of showers and cooler Friday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers in the evening, partly cloudy late Friday night (under 0.10 in. of rain possible),
• A mix of clouds and sun and a bit cooler Saturday, then partly cloudy at night.
• lows 47-50 cooling to 45 Saturday night highs 80-70.
• Partly cloudy with a slight (20%) chance of showers Sunday afternoon and   Sunday night,
• A mix of clouds and sun  and a bit cooler with a slight (20%) chance of showers Monday and Tuesday (cooler), mostly cloudy with a slight (20%) chance of showers Monday night,
• Partly cloudy with a slight (20%) chance of showers Tuesday night Wednesday morning, then just partly cloudy Wednesday afternoon.
• highs 72-67 warming to back to 72 Tuesday and Wednesday lows 46-48. (seasonal averages high 75 low 46)

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Your College Football Forecasts:

Friday:

Beavers vs Stanford at Reser Stadium -Kickoff 7 PM PDT: Mostly cloudy with the chance of showers tapering off to a slight chance in the evening 66 cooling through the low 60s by the end of the game.

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Saturday:

Ducks vs Utah at Autzen Stadium – Kickoff 5:30 PM PDT: Partly cloudy 68 and cooling through the 60s as the game progresses.

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Saturday:

Ducks vs Utah at Autzen Stadium – Kickoff 5:30 PM PDT: Partly cloudy 70 and cooling through the 60s as the game progresses.

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Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy this evening, mostly clear tonight,
• Partly cloudy Thursday and in the evening, mostly cloudy with  slight (20%) chance of rain late Thursday night, a slight (20%) chance of showers and cooler Friday afternoon and evening, just mostly cloudy late Friday night,
• Mostly cloudy with a slight (20%) chance of rain Saturday AM, mostly cloudy and cooler in the afternoon, then partly cloudy Saturday night.
• lows 50-53 cooling to 46 Saturday night highs 83-74 Friday
• Partly cloudy with a slight (20%) chance of showers Sunday afternoon and evening, mostly cloudy with a (30%) chance of showers Sunday night through Tuesday, partly cloudy with and a bit warmer with a slight (20%) chance of showers Tuesday night and Wednesday.
• highs 74-70 warming back to 74 Wednesday lows 46-50. (seasonal averages high 77 low 50)

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

• Partly cloudy tonight and Thursday, mostly cloudy with a slight (20%) chance of rain Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of rain Friday AM, mostly cloudy with a slight (20%) chance of showers in the afternoon and evening (under 0.10 in. of rain possible), just mostly cloudy Friday night,
• Then partly cloudy Saturday and Saturday night.
• lows 52-55 highs near 65.
• Partly cloudy with a slight (20%) chance of showers and a bit cooler Sunday afternoon and evening, mostly cloudy with a (30%) chance of showers Sunday night through Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday AM, then partly cloudy with a slight (20%) chance of showers in the afternoon through Wednesday.
• highs 64-66 lows 48-52. (seasonal averages high 64 low 49).

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight through Thursday night,
• Mostly cloudy with a slight (20%) chance of AM rain, a slight (20%) chance of showers and cooler in the afternoon and evening, partly cloudy late Friday night,
• A mix of clouds and sun with a slight (20%) chance of showers and cooler Saturday afternoon, then just partly cloudy Saturday night.
• free air freezing level 13,000 ft. tonight through Thursday night, then snow level above 8,000 ft. Thursday night through Saturday, then 7,000 ft Saturday night.
• lows 40-43 cooling to 36 Saturday night highs 65-58 warming to near 60 Saturday.
• Partly cloudy with a slight (20%) chance of showers Sunday afternoon and at night,
• A mix of clouds and sun with a (30%) chance of showers Monday and Tuesday, mostly cloudy Monday evening, partly cloudy with a (30%) chance of showers both nights,
• Partly cloudy with a slight (20%) chance of showers Wednesday AM, then just partly cloudy Wednesday afternoon.
• snow level above 7,500 ft. Sunday, then above 8,000 ft. Sunday night through Wednesday.
• highs 57-54 warming to near 60 Tuesday lows near near 35.

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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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