Here is my new weekly weather quiz question. What is “coalescence?” 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 upper level airflow is sending cooler air our way and continuing our rain chances. A frontal system will move in Wednesday then part of it will bend back to the northeast and move over us again.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 18 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 20 in the Good category measuring Particulate Matter.

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

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Advisories:

• A HIGH WIND WARNING IS IN EFFECT FROM 10 AM UNTIL 7 PM TUESDAY FOR THE NORTH OREGON COAST AND THE COAST RANGE OF NORTHWEST OREGON.
• 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.

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

• Mostly cloudy with rain and a bit cooler this afternoon (0.25 in. of rain possible) and a bit breezy (Wind: S 15-20 mph gusts to 30 mph this afternoon), rain tonight (0.25 in. of rain possible)
• Rain Tuesday (0.25 in. of rain possible) and Tuesday night (0.25 in. of rain possible),
• Cloudy and a bit cooler with a good (50%) chance of showers Wednesday, then rain likely (70%) Wednesday night.
• highs 50-60 cooling to 54 Wednesday lows 48-46.
• Mostly cloudy with rain and a bit cooler Thursday, a (40%) chance of rain at night,
• A mix of clouds and sun and cooler with a (40%) chance of showers Friday, partly cloudy with a (40%) chance of showers Friday night,
• Then a mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Saturday and Sunday, partly cloudy with a slight (20%) chance of showers Saturday night.
• highs 55-48 lows 37-40 cooling back to 37 Saturday night. (seasonal averages high 52 low 38)

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Your Saturday College Football Forecast:

Ducks vs USC at Autzen Stadium – Kickoff 12:30 PM PST: A mix of clouds and sun with a slight chance of showers, 44 warming to 48 by the end of the game.

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Beavers vs Washington at Reser Stadium – Kickoff 3:00 PM PST: Partly cloudy with a slight chance of showers, 48 cooling as the game progresses.

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Forecast for Roseburg:

• Cloudy and cooler with a good (50%) chance of rain this afternoon (0.10 in. of rain possible) and tonight (0.15 in. of rain possible),
• Cloudy with rain likely (70%) and a bit warmer Tuesday (0.10 in. of rain possible), rain Tuesday night (0.25 in. of rain possible),
• Mostly cloudy with a (40%) chance of showers Wednesday, a good (50%) chance of evening rain, then rain likely (70%) late at night.
• highs 57-53 lows 48-45.
• Mostly cloudy with a good (50%) chance of rain and a bit cooler Thursday and Thursday night,
• Mostly cloudy with a (40%) chance of showers and a bit cooler Friday and at night,
• Patchy AM fog, partly cloudy with a slight (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
• Then patchy AM fog and partly cloudy with a (30%) chance of showers Sunday.
• highs 54-48 lows 42-37. (seasonal averages high 53 low 40)

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

• Mostly cloudy with coastal rain this afternoon while a good (50%) chance of early afternoon inland rain and cloudy with afternoon rain (0.15 in. of rain possible) likely (70%), evening coastal rain while evening inland rain likely (70%), a good (50%) chance of rain late tonight (0.25 in. of rain possible) and breezy (Wind: SW 15-25 mph decreasing to SW 10-15 mph late at night).
• Mostly cloudy with rain likely (70%) Tuesday (0.15 in. of rain possible) and evening, coastal showers likely (70%) late at night while inland showers (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of rain scattered showers Wednesday and in the evening, rain likely (70%) late Wednesday night.
• highs 58-55 lows 50-48.
• Mostly cloudy and a bit cooler with a good (50%) chance of rain Thursday and Thursday night,
• A (30%) chance of showers and a bit warmer Friday and Friday night,
• Patchy AM fog, mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday, a slight (20%) chance of rain at night,
• Patchy AM fog, then mostly cloudy with a (30%) chance of showers Sunday.
• highs 57-52 lows 45-43. (seasonal averages high 55 low 43).

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Forecast for the Cascades in Lane County:

• Cloudy with rain and snow and a bit warmer this afternoon and evening (0.25 in. of rain possible, 2 in. of snow possible), rain tonight and breezy (Wind: SW 15-25 mph gusts to 40 mph) late tonight (0.50 in. of rain possible, 2 in. of snow possible),
• Mostly cloudy and warmer with rain Tuesday (0.50 in. of rain possible) and  showers and breezy Tuesday night (Wind: SW 20-30 mph gusts to 50 mph),
• Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Wednesday afternoon, then rain or snow late at night.
• snow level 3,500 ft. this afternoon, 7,000 ft. late tonight and Tuesday, 7,000 ft. falling to 6,500 ft. Tuesday night, 5,000 ft. Wednesday, then 6,000 ft. Wednesday night.
• highs 34-42 cooling to 37 Wednesday lows 33-30 warming back to 33 Wednesday night.
• Rain and a bit warmer Thursday, mostly cloudy with a good (50%) chance of rain at night,
• Then a mix of clouds and sun with a (40%) chance of showers Friday, partly cloudy with a (40%) chance of showers Friday night,
• Then a mix of clouds and sun with a (30%) chance of showers Saturday (warmer) and Sunday (cooler), partly cloudy with a slight (20%) chance of showers Saturday night.
• snow level 6,500 ft. Thursday and Thursday night, 5,500 ft. Friday and Friday night, 5,000 ft. Saturday, then 6,000 ft. Saturday night and Sunday.
• highs near 40 lows 26-32 cooling to 28 Saturday night.

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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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