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 29 in the Good category measuring Ozone.

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

Cottage Grove: The Air Quality Index is 34 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,
• Mostly cloudy with a (30%) chance of AM rain, a slight (20%) chance of showers and cooler Friday afternoon and evening (under 0.10 in. of rain possible), just partly cloudy late Friday night,
• Partly cloudy and a bit cooler Saturday through Sunday AM, mostly sunny in the afternoon, then partly cloudy Sunday night.
• lows 52-44 highs 76-72.
• Partly cloudy Monday, mostly cloudy in the evening, 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, mostly cloudy with a slight (20%) chance of showers Monday night, partly cloudy with a slight (20%) chance of showers Tuesday night through Wednesday night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Thursday.
• highs near 70 lows near 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 a slight chance of showers tapering off late in the evening then just mostly cloudy near 70 cooling through the low 60s by the end of the game, wind: N 5-10 mph.

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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, wind: N 5-10 mph.

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Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with  slight (20%) chance of rain late tonight,
• Mostly cloudy with a slight (20%) chance of AM rain, partly cloudy and cooler with a slight (20%) chance of showers Friday afternoon,  partly cloudy Friday night,
• Mostly cloudy Saturday, partly cloudy Saturday through Sunday evening, then mostly cloudy with a slight (20%) chance of showers late Sunday night.
• lows 53-48 highs 80-74.
• Mostly cloudy with a (30%) chance of showers Monday through Tuesday, partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday night and Wednesday, then partly cloudy with a slight (20%) chance of showersWednesday night and Thursday.
• highs 74-77 lows 52-48. (seasonal averages high 76 low 50)

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

• Mostly cloudy with a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of rain Friday AM, a slight (20%) chance of showers in the afternoon, partly cloudy with a slight (20%) chance of evening coastal showers (under 0.10 in. of rain possible), just mostly cloudy late Friday night,
• Mostly cloudy Saturday AM, partly cloudy in the afternoon and Saturday night,
• Mostly cloudy Sunday AM, partly cloudy in the afternoon and evening, then mostly cloudy with a (30%) chance of showers late Sunday night.
• lows 54-50 highs near 65.
• Mostly cloudy with a (30%) chance of showers Monday and Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday through Wednesday night,
• Then partly cloudy with a slight (20%) chance of showers Thursday.
• highs 64-66 lows 52-50 warming back to 52 Wednesday night. (seasonal averages high 64 low 49).

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight through Sunday AM, mostly sunny in the afternoon, then partly cloudy Sunday night.
• free air freezing level 13,000 ft. tonight, 12,000 ft. Friday and Friday night, 11,000 ft. Saturday and Saturday night, 12,000 ft. Sunday, then 11,000 ft. Sunday night.
• lows 43-36 highs 64-60 warming to near 62 Sunday.
• Partly cloudy Monday, mostly cloudy in the evening, 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 showers Tuesday night through Wednesday night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Thursday.
• free air freezing level 11,000 ft. Monday, snow level above 8,000 ft. Monday through Thursday.
• highs 60-58 lows near near 38.

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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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