Here is my new weekly weather quiz question. What is “a Depression?” 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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A large upper level low (Shaded U shape with blue arrows) is keeping our weather static with morning and late night fog that could be quite dense. By Saturday another frontal system approaches the Pacific Northwest. Even more frontal systems line up offshore early next week. Local skiers continue to rejoice. The mountains have a lot of new snow and Willamette Pass, Hoodoo and Mt. Ashland are all open. Check their websites for updates.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 53 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 36 in the Good category measuring Particulate Matter.

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

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Advisories:

• A DENSE FOG ADVISORY IS IN EFFECT UNTIL 6 AM SATURDAY FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.

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

• Mostly cloudy with areas of dense fog, partly cloudy and a bit warmer this afternoon, mostly cloudy with patchy fog and a good (50%) chance of rain and a slight (20%) chance of freezing rain late tonight (0.10 in. of rain possible),
• Cloudy with AM rain and a slight (20%) chance of freezing rain, a good (50%) chance of rain and warmer in the afternoon (0.15 in. of rain possible) and evening, mostly cloudy with a slight (20%) chance of showers late Saturday night (under 0.10 in. of rain possible),
• Mostly cloudy with areas of fog Sunday AM, partly cloudy and a bit cooler Sunday afternoon and evening, then mostly cloudy with patchy fog and freezing fog late Sunday night.
• highs near 45 lows 36-32.
• Mostly cloudy with patchy AM fog and freezing fog Monday with a slight (20%) chance of rain and snow, a bit cooler with a slight (20%) chance of rain in the afternoon, a (30%) chance of rain Monday night,
• A mix of clouds and sun with a slight (20%) chance of rain and a bit warmer Tuesday, mostly cloudy with a (30%) chance of rain Tuesday night,
• Cloudy and a bit warmer with a (40%) chance of rain Wednesday, a (30%) chance of rain Wednesday night,
• Then mostly cloudy with a slight (20%) chance of rain Thursday.
• highs 43-49 cooling to 46 Thursday lows near 34-38. (seasonal averages high 46 low 34)

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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 areas of fog and a slight (20%) chance of showers this AM (under 0.10 in. of rain possible, snow level 3,000 ft.), just mostly cloudy this afternoon, mostly cloudy with a slight (20%) chance of evening rain (snow level 3,500 ft.), rain likely (60%) late tonight (0.15 in. of rain possible, snow level 3,500 ft. late at night),
• AM rain Saturday, with rain likely (60%) in the afternoon (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers Saturday night (under 0.10 in. of rain possible),
• Partly cloudy with patchy AM and late night fog Sunday and Sunday night.
• highs near 50 lows near 38.
• Partly cloudy with patchy fog and a (30%) chance of rain Monday, mostly cloudy with a (40%) chance of showers Monday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit warmer Tuesday, a slight (20%) chance of rain at night,
• A bit cooler with a (40%) chance of rain Wednesday, then a slight (20%) chance of rain Wednesday night and Thursday.
• highs 48-52 cooling to 47 Wednesday warming to 49 Thursday lows 38-36. (seasonal averages high 49 low 36)

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

• Mostly cloudy with patchy AM fog and a slight (20%) chance of showers, just partly cloudy this afternoon (under 0.10 in. of rain possible), a good (50%) chance of evening rain, rain late tonight (0.20 in. of rain possible),
• Mostly cloudy and a bit cooler with AM rain, rain likely (60%) Saturday afternoon, a (30%) chance of evening showers (under 0.10 in. of rain possible), just mostly cloudy late Saturday night,
• Then partly cloudy Sunday and Sunday night with patchy AM and late night fog
• highs near 54 lows 42-40 warming to 43 Sunday night.
• Mostly cloudy and a bit cooler with patchy fog and a (40%) chance of rain Monday, a (40%) chance of showers Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday, then mostly cloudy with a (40%) chance of rain Tuesday night through Thursday.
• highs 50-53 lows 43-40. (seasonal averages high 51 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of isolated rain and snow showers this AM, partly cloudy this afternoon and in the evening, becoming mostly cloudy with a good (50%) chance of snow late tonight,
• Mostly cloudy with AM snow, rain and snow likely (70%) Saturday afternoon, a (40%) chance of rain and snow in the evening, a slight (20%) chance of rain and snow showers late at night,
• Then partly cloudy and a bit warmer Sunday and Sunday night.
• snow level 3,500 ft. today, 2,500 ft. tonight and Saturday, 3,000 ft. Saturday night, free air freezing level 4,500 ft. Sunday, then 5,000 ft. Sunday night.
• highs near 33 lows 25-23.
• A mix of clouds and sun with a slight (20%) chance of rain and snow Monday, mostly cloudy with a (30%) chance of rain and snow Monday night,
• Clouds and sun with a slight (20%) chance of rain and snow Tuesday, mostly cloudy with a (30%) chance of rain and snow Tuesday night,
• Mostly cloudy with a (40%) chance of rain and snow Wednesday and at night,
• Then a mix of clouds and sun with a slight (20%) chance of snow Thursday.
• snow level 4,500 ft. Monday, 5,000 ft Monday night, 4,500 ft. Tuesday and  Tuesday night, 4,000 ft. Wednesday, 3,000 ft. Wednesday night, then 2,500 ft. Thursday.
• highs 33-35 cooling back to 33 Thursday lows near 26.

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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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