Here is my weekly weather quiz question. What is an “Observation Well?”  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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An upper level ridge of high pressure (Shaded “Arch” shape with blue arrows) took over to keep the rain away from us, but that will soon change.  Some fairly weak storms will add clouds and showers to the mix. A new frontal system is poised to move in which will bring the chance of rain back. Here is another frontal system shown moving toward Oregon Friday morning which means more showery weather. Sunday will see yet another frontal system setting up to move into the Pacific Northwest.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 73 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 155 in the Unhealthy category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 47 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 patchy fog this AM, mostly cloudy with possible sun breaks this afternoon, mostly cloudy with a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of afternoon rain Thursday (under 0.10 in. of rain possible), cloudy with a good (50%) chance of rain late at night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with rain Friday, then showers likely (70%) Friday night.
• highs 60-55 lows 46-42.
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Saturday, rain likely (70%) Saturday night,
• Mostly cloudy and a bit cooler with rain Sunday, cloudy with a good (50%) chance of rain Sunday night,
• Mostly cloudy and warmer with a (30%) chance of rain Monday (Washington’s Birthday, Presidents’ Day) and Monday night,
• Then mostly cloudy and cooler with a (30%) chance of showers Tuesday.
• high 55-52 warming to 58 Monday cooling to 54 Tuesday lows near 43. (seasonal averages high 50 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 patchy AM fog and a slight (20%) chance of rain, just mostly cloudy this afternoon, a slight (20%) chance of rain late  tonight,
• Cloudy with a slight (20%) chance of rain Thursday AM, just cloudy and a bit warmer in the afternoon, mostly cloudy with a slight (20%) chance of rain Thursday night,
• Mostly cloudy and a bit cooler with rain Friday, then showers likely (70%) Friday night.
• highs 62-57 lows 48-42.
• Mostly cloudy with a (30%) chance of rain and a bit cooler Saturday through Sunday AM, rain likely (70%) Sunday afternoon, cloudy with a slight (20%) chance of rain Sunday night,
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Monday (Washington’s Birthday, Presidents’ Day), just mostly cloudy at night,
• Then mostly cloudy with a slight (20%) chance of rain Tuesday.
• highs 56-62 cooling to near 60 Tuesday lows near 45. (seasonal averages high 53 low 37).

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

• Cloudy with a slight (20%) chance of rain at the shore today while a slight (20%) chance of AM inland  rain and drizzle, just cloudy this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of coastal rain tonight while a slight (20%) chance of inland rain late tonight (under 0.10 in. of rain possible),
• Cloudy and a bit warmer with a (30%) chance of rain Thursday, a good (50%) chance of rain at night,
• Mostly cloudy and a bit cooler with rain Friday, then showers likely (70%) and cooler Friday night.
• highs 65-58 lows 52-46.
• Mostly cloudy with a (30%) chance of rain Saturday and at night,
• A good (50%) chance of rain Sunday AM, rain likely (70%) and a bit warmer in the afternoon, cloudy with a (30%) chance of rain Sunday night,
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Monday (Washington’s Birthday, Presidents’ Day), just mostly cloudy at night,
• Then mostly cloudy and a bit cooler with a (30%) chance of rain Tuesday.
• highs 56-65 cooling to 60 Tuesday lows near 50. (seasonal averages high 52 low 40).

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Forecast for the Cascades in Lane County:

• Partly cloudy today with increasing clouds late, a slight (20%) chance of rain this evening, mostly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Thursday afternoon,  a slight (20%) chance of rain at night,
• Cloudy and cooler with rain Friday, then showers Friday night.
• free air freezing level 10,000 ft. today, snow level 8,000 ft. tonight, 9,000 ft. Thursday, snow level 8,000 ft. Thursday night and Friday, then 7,000 ft. falling to 4,500 ft. late Friday night.
• highs 49-53 cooling to 43 Friday lows 37-30.
• Mostly cloudy with a good (50%) chance of rain and snow showers and a bit cooler Saturday, rain likely (70%)  at night,
• Mostly cloudy and a bit warmer with rain Sunday, cloudy with a good (50%) chance of rain Sunday night,
• A slight (20%) chance of rain and a bit warmer Monday (Washington’s Birthday, Presidents’ Day) and at night,
• Then a partly cloudy and a bit cooler with a (30%) chance of rain Tuesday.
• snow level 4,000 ft. Saturday, 5,000 ft. Saturday night, 6,500 ft. Sunday, 7,500 ft. Sunday night, 8,000 ft. Monday and Monday night, then 7,000 ft. Tuesday.
• highs 39-47 cooling to 44 Tuesday lows 30-36.

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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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