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 moving through the Pacific Northwest, but it’s not producing much precipitation.  There will be a break then a chance of showers again Tuesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 32 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 23 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).

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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:

• A mix of clouds and sun with a slight (20%) chance of showers and cooler this afternoon and evening (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers late tonight and Saturday AM, partly cloudy and a bit cooler Saturday through Sunday AM, mostly sunny in the afternoon, then partly cloudy Sunday night.
• highs 76-72 lows 50-40.
• 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.
• highs near 72 lows near 48. (seasonal averages high 75 low 45)

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Your College Football Forecasts:

Today:

Beavers vs Stanford at Reser Stadium -Kickoff 7 PM PDT: Mostly cloudy with a slight chance of showers tapering off late this evening then just mostly cloudy near 70 cooling through the low 60s by the end of the game, wind: NW 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 10-15 mph.

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy and cooler with a slight (20%) chance of isolated showers this afternoon,  partly cloudy tonight,
• Mostly cloudy Saturday, partly cloudy Saturday through Sunday evening, then mostly cloudy with a slight (20%) chance of showers late Sunday night.
• highs 80-74 lows 52-48.
• 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 49)

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

• Mostly cloudy with a slight (20%) chance of isolated showers this afternoon, just mostly cloudy late tonight and Saturday AM, partly cloudy in the afternoon and Saturday night,
• Partly cloudy Sunday, then partly cloudy with a (30%) chance of showers late Sunday night.
• highs 66-64 lows 52-50.
• Partly 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 today through Sunday AM, mostly sunny in the afternoon, then partly cloudy Sunday night.
• free air freezing level 13,000 ft. today, 12,000 ft. tonight, 11,000 ft. Saturday and Saturday night, then 12,000 ft. Sunday and Sunday night.
• highs 66-60 warming to near 62 Sunday lows 42-36.
• Partly cloudy with a slight (20%) chance of showers Monday afternoon and 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.
• 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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