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.

________________

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.

_______________

Air Quality Index:

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

Oakridge: The Air Quality Index is 10 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).

________________

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.

________________

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

• Mostly cloudy with a slight (20%) chance of showers tonight and Saturday AM, partly cloudy and a bit cooler Saturday, colder Saturday night with patchy fog late.
• Patchy fog Sunday AM, partly cloudy in the afternoon through Monday night.
• lows 50-42 warming to 58 Monday night highs 70-73.
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday afternoon, partly cloudy with a slight (20%) chance of showers Tuesday night through Wednesday evening, mostly cloudy with a slight (20%) chance of showers late at night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Thursday, mostly cloudy with a slight (20%) chance of evening showers, then just partly cloudy late Thursday night and Friday.
• highs 73-70 warming back to 73 Friday lows 47-50. (seasonal averages high 75 low 45)

_____

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.

_____

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.

________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with a slight (20%) chance of showers this evening,  mostly cloudy with patchy fog and a slight (20%) chance of rain and drizzle late tonight,
• Mostly cloudy with patchy fog and a slight chance of rain and drizzle Saturday AM, partly cloudy Saturday afternoon through Sunday morning, sunny in the afternoon,  mostly clear Sunday night,
• Then partly cloudy with a slight (20%) chance of showers Monday and Monday night.
• lows 55-46 warming to 49 Monday night highs 74-76.
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday AM, just partly cloudy in the afternoon and  Tuesday night,
• Partly cloudy with a slight (20%) chance of showers Wednesday and Wednesday night,
• Partly cloudy with a slight (20%) chance of showers Thursday AM, then just partly cloudy Thursday afternoon.
• highs 75-73 warming to 78 Thursday and Friday lows near 50. (seasonal averages high 76 low 49)

________________

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

• Mostly cloudy with a slight (20%) chance of coastal showers this evening and a slight (20%) chance of rain and drizzle late tonight while partly cloudy with a slight (20%) chance evening inland showers and mostly cloudy with patchy fog and a slight (20%) chance of rain and drizzle inland late tonight,
•  Mostly cloudy with patchy fog and a slight (20%) chance of rain and drizzle Saturday AM, partly cloudy in the afternoon through Sunday AM, sunny in the afternoon, mostly clear Sunday night,
• Then partly cloudy with a slight (20%) chance of showers Monday and Monday night.
• lows 52-48 warming to 50 Monday night highs near 64.
• Partly cloudy with a slight (20%) chance of showers Tuesday, just partly cloudy in the evening,  mostly cloudy late at night,
• Mostly cloudy with a slight (20%) chance of showers Wednesday and Wednesday night,
• Partly cloudy with a slight (20%) chance of showers Thursday morning, then just partly cloudy Thursday afternoon through Friday.
• highs 63-67 cooling to 65 Friday lows 50-52. (seasonal averages high 64 low 49).

________________

Forecast for the Cascades in Lane County:

• Partly cloudy this evening, mostly cloudy with a sight (20%) chance of showers late tonight,
• A mix of clouds and sun with a slight (20%) chance of showers Saturday, partly cloudy and colder Saturday night,
• Partly cloudy Sunday AM, mostly sunny in the afternoon, partly cloudy Sunday night,
• Partly cloudy with a slight (20%) chance of showers Monday afternoon, then  just partly cloudy Monday night.
• snow level above 8,000 ft. tonight and Saturday,  11,000 ft. Saturday night, 12,000 ft. Sunday and Sunday night, snow level above 8,000 ft. Monday, then free air freezing level 11,000 ft. Monday night.
• lows 42-37 warming to 40 Monday night highs 60-63.
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday afternoon, partly cloudy with a slight (20%) chance of showers Tuesday night through Thursday, then just partly cloudy Thursday night and Friday.
• snow level above 8,000 ft. Tuesday through Thursday, free air freezing level 11,000 ft. Thursday night, then 12,000 ft. Friday.
• highs 62-58 warming back to 62 Friday lows near 38-42.

_______________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________