Here is my weekly weather quiz question for the last time. What is an “Observation Well?” Here is the correct answer. An Observation Well, in hydrologic terms, is a non-pumping well used for observing the elevation of the water table or piezometric surface. I’ll have a new weekly weather quiz question for you starting Monday. 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 (Shaded area with blue arrows) will be sending more moisture into the Pacific Northwest for a while. A warm front (shown offshore in red)  will be spreading more moisture our way today.  The parade of storms continues Tuesday as a frontal system approaches. More frontal systems gather offshore Wednesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 13 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 15 in the Good category measuring Particulate Matter.

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

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Advisories: None At This Time.

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

• Mostly cloudy with a good (50%) chance of rain and a bit cooler this afternoon (0.10 in. of rain possible), rain tonight (0.50 in. of rain possible) and Sunday (under 0.25 in. of rain possible and a bit warmer), mostly cloudy with a slight (20%) chance of rain Sunday night (under 0.10 in. of rain possible) patchy fog late.
• Patchy AM fog and a slight (20%) chance of rain, otherwise a mix of clouds and sun and a bit warmer Monday (Washington’s Birthday, Presidents’ Day), partly cloudy in the evening, then mostly cloudy with a slight (20%) chance of rain late Monday night.
• highs 54-60 lows 48-45.
• A mix of clouds and sun with a slight (20%) chance of rain Tuesday, mostly cloudy with a slight (20%) chance of rain and a bit cooler Tuesday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Wednesday, rain at night,
• Cloudy with a showers likely (60%) and a bit cooler Thursday, then mostly cloudy with a (40%) chance of rain Thursday night and Friday.
• high 60-53 warming to 55 Friday lows 46-42. (seasonal averages high 51 low 35).

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Home Wood Heating Advisory:

Eugene-Springfield: YELLOW – Caution is Advised.

Oakridge: YELLOW – Caution is Advised.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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Forecast for Roseburg:

• Mostly cloudy with a slight (20%) chance of rain and a bit cooler this afternoon, rain tonight (0.20 in. of rain possible) and Sunday AM, rain likely (60%) and a bit warmer in the afternoon (0.20 in. of rain possible), mostly cloudy with a slight (20%) chance of evening rain, patchy fog late Sunday night,
• Mostly cloudy with patchy AM fog, partly cloudy and a bit warmer Monday afternoon (Washington’s Birthday, Presidents’ Day), then partly cloudy at night.
• highs 57-63 lows 47-43.
• Partly cloudy Tuesday, mostly cloudy Tuesday night,
• Cloudy and a bit cooler with a good (50%) chance of rain Wednesday, rain likely (60%) Wednesday night,
• Cloudy with a (40%) chance of rain and a bit cooler Thursday and Thursday night,
• Then mostly cloudy and a bit warmer with a (40%) chance of rain Friday.
• highs 64-53 warming to 60 Friday lows 46-40. (seasonal averages high 53 low 37).

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy today with a slight (20%) chance of afternoon rain (under 0.10 in. of rain possible), rain tonight (0.30 in. of rain possible) and Sunday AM, rain likely (70%) and a bit warmer in the afternoon (0.25 in. of rain possible), mostly cloudy with a slight (20%) chance of inland evening rain and partly cloudy late at night while a slight (20%) chance of coastal rain Sunday night with patchy fog late,
• Mostly cloudy with patchy AM fog partly cloudy and a bit warmer Monday afternoon (Washington’s Birthday, Presidents’ Day), then partly cloudy Monday night.
• highs 55-65 lows 50-48.
• Partly cloudy Tuesday, mostly cloudy with a slight (20%) chance of rain Tuesday night,
• Mostly cloudy with rain likely (60%) and a bit cooler Wednesday and Wednesday night,
• Cloudy with a good (50%) chance of rain Thursday through Friday (a bit warmer).
• highs 62-55 warming to 58 Friday lows 50-46. (seasonal averages high 53 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of rain and snow and a bit cooler this afternoon, rain and snow this evening, rain late tonight (1.00 in. of rain possible, 2 in. of snow possible),
• Mostly cloudy and a bit warmer with rain Sunday (0.50 in. of rain possible), cloudy with a good (50%) chance of rain Sunday night,
• A mix of clouds and sun and a bit warmer Monday (Washington’s Birthday, Presidents’ Day) with a slight (20%) chance of rain, then just partly cloudy at night.
• snow level 4,000 ft. late today, 5,000 ft. rising to 6,500 ft. late tonight, 7,500 ft. Sunday, 8,000 ft. Sunday night and Monday, then free air freezing level 9,000 ft. Monday night,
• highs 40-50 lows 33-37.
• A mix of clouds and sun Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night,
• Cloudy with a good (50%) chance of rain and cooler Wednesday, rain and snow Wednesday night,
• Rain and snow likely (70%) and a bit cooler Thursday, a good (50%) chance of rain and snow at night,
• Then mostly cloudy and a bit warmer with a (30%) chance of rain and snow Friday.
•  snow level 7,000 ft. Tuesday through Wednesday, 5,500 ft. Wednesday night, 3,500 ft. Thursday and Thursday night, then 5,000 ft. Friday.
• highs 50-39 warming to 43 Friday lows 39-30.

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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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