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 followed by a cold front spread 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 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 33 in the Good category measuring Particulate Matter.

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

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 4,000 FT. FOR THE NORTHERN OREGON CASCADES (NOT INCLUDING THE CASCADES IN LANE COUNTY.)

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

• Mostly cloudy with 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 good (50%) chance of rain Sunday night (under 0.10 in. of rain possible), patchy fog late.
• Mostly cloudy with patchy AM fog, a bit warmer with a slight (20%) chance of rain Monday (Washington’s Birthday, Presidents’ Day), partly cloudy with a slight (20%) chance of rain Monday night, patchy fog late,
• Patchy AM fog, a mix of clouds and sun with a slight (20%) chance of rain Tuesday, then mostly cloudy with a slight (20%) chance of rain and a bit cooler Tuesday night.
• lows 48-50 cooling to 42 Monday night warming to 45 Tuesday night highs 58-62.
• Mostly cloudy and a bit cooler with rain likely (70%) Wednesday, rain at night,
• Cloudy with a good (50%) chance of showers and a bit cooler Thursday, a good (50%) chance of rain Thursday night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain Friday through Saturday.
• high 57-52 warming to 55 Friday and Saturday lows 43-40. (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 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), a (30%) chance of rain with patchy fog late Sunday night,
• Mostly cloudy with areas of AM fog, partly cloudy and a bit warmer Monday afternoon (Washington’s Birthday, Presidents’ Day) through Tuesday, mostly cloudy Tuesday night,
• lows 46-43 warming back to 46 Tuesday night highs 58-64.
• Cloudy and a bit cooler with rain likely (60%) Wednesday and Wednesday night,
• Mostly cloudy with showers likely (60%) and a bit cooler Thursday, cloudy with a (40%) chance of rain at night,
• Rain likely (60%) and a bit warmer Friday, mostly cloudy with a (40%) chance of rain Friday night,
• Then cloudy with a (40%) chance of rain Saturday.
• highs 59-55 warming back to 59 Saturday lows near 43. (seasonal averages high 53 low 37).

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

• Mostly cloudy rain tonight (0.40 in. of rain possible) and Sunday AM, rain likely (70%) and a bit warmer in the afternoon (0.20 in. of rain possible), a slight (20%) chance of rain with patchy fog late,
• Mostly cloudy with a slight (20%) chance of AM fog, partly cloudy and a bit warmer Monday afternoon (Washington’s Birthday, Presidents’ Day), just partly cloudy Monday night and Tuesday, then mostly cloudy Tuesday night.
• lows 50-47 warming back to 50 Tuesday night highs 58-63.
• Mostly cloudy with rain likely (60%) and a bit cooler Wednesday, rain Wednesday night,
• Mostly cloudy and a bit cooler with showers likely (70%) Thursday, cloudy with a good (50%) chance of rain at night,
• Rain likely (70%) and a bit warmer Friday, mostly cloudy with a (40%) chance of rain Friday night,
• Then cloudy with a (40%) chance of rain and a bit warmer Saturday.
• highs 59-55 warming back to 59 Saturday lows near 46. (seasonal averages high 53 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with 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 (0.75 in. of rain possible), evening rain likely (70%), 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, just partly cloudy at night and and Tuesday, then mostly cloudy with a slight (20%) chance of rain Tuesday night.
• snow level 5,000 ft. rising to 6,500 ft. late tonight, 7,500 ft. Sunday, 8,000 ft. Sunday night, 7,500 ft. Monday, free air freezing level 9,000 ft. Monday night and Tuesday, then snow level 7,000 ft. Tuesday night.
• lows 32-39 highs 46-52.
• Cloudy with a good (50%) chance of rain and cooler Wednesday, rain and snow Wednesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Thursday and at night,
• Then mostly cloudy and a bit warmer with a (40%) chance of rain and snow Friday through Saturday.
•  snow level 7,000 ft. Wednesday, 5,500 ft. Wednesday night, 3,500 ft. Thursday and Thursday night, 5,000 ft. Friday, 4,500 Friday night, then 4,000 ft. Saturday.
• highs 45-36 warming to 42 Thursday and Friday lows near 29.

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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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