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Here is my new weekly weather quiz question. In times of active weather the “Mesonet” comes in handy. What is it? 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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Another upper level high pressure ridge (the shaded “Arch” shape) is moving eastward over us bringing sunshine and drying yet this AM, but this afternoon, Presidents’ Day, we will see the return of the rain as a trough of low pressure (Shaded “U” shape) moves in along the coast.  Another frontal system, in a series of many, will slide toward us Friday increasing the rain chances.

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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: A mix of clouds and sun with a (40%) chance of  rain this afternoon (under 0.10 in. of rain possible), rain tonight (0.10 in. of rain possible), mostly cloudy with AM showers likely (60%), a good (50%) chance of showers Tuesday afternoon (under 0.10 in. of rain possible), just mostly cloudy at night, a slight (20%) chance of showers Wednesday AM, a good (50%) chance of rain in the afternoon, then a good (50%) chance of rain Wednesday night highs 44-47 lows 35-32 warming to 36 Wednesday night. Mostly cloudy with rain likely (60%) Thursday through Saturday, a good (50%) chance of showers Saturday night, then mostly cloudy with a good (50%) chance of rain Sunday highs 47-43 warming to 46 Sunday lows near 36. (seasonal averages high 52 low 35)

Forecast for the Umpqua Basin including Roseburg: Partly cloudy this AM (Presidents’ Day), mostly cloudy with a (30%) chance of rain and snow (under 0.10 in. of rain possible, snow level 3,000 ft.) this afternoon, evening rain, rain and snow late tonight (0.10 in. of rain possible, 1-2 in. of snow possible, snow level 3,000 ft. falling to 2,500 ft.), cloudy with AM rain and snow showers, a good (50%) chance of rain and snow showers Tuesday afternoon (0.10 in. of rain possible, snow level 2,000 ft.), a slight (20%) chance of rain and snow showers at night (snow level 2,000 ft. late), mostly cloudy with a slight (20%) chance of rain and snow showers Wednesday AM, then a (30%) chance of rain and snow in the afternoon and Wednesday night  highs 50-46 warming to 52 Wednesday lows 34-38. Mostly cloudy with rain and snow likely (70%) Thursday, rain and snow showers likely (60%) Thursday night, a good (50%) chance of  rain and snow Friday, rain and snow showers likely (60%) Friday night and Saturday, a good (50%) chance of evening rain and snow showers, then mostly cloudy with a good (50%) chance of rain and snow late Saturday night and Sunday highs 48-50 lows near 37. (seasonal averages high 54 low 37)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this AM (Presidents’ Day), mostly cloudy with a (40%) chance of rain this afternoon (under 0.10 in. of rain possible), rain tonight (0.25 in. of rain possible), cloudy with AM coastal showers and a slight (20%) chance of isolated thunderstorms and a good (50%) chance of afternoon coastal showers and isolated thunderstorms Tuesday, inland AM rain and snow showers with rain showers Tuesday afternoon (0.10 in. of rain possible, snow level 2,000 ft.), a slight (20%) chance of showers Tuesday night (under 0.10 in. of rain possible, snow level 2,000 ft.), mostly cloudy with a slight (20%) chance of showers Wednesday AM, a good (50%) chance of rain in the afternoon, then mostly cloudy with rain likely (60%) Wednesday night highs 45-49 lows 36-39 cooling to 34 Tuesday night and warming to 40 Wednesday night. Mostly cloudy with rain Thursday, showers likely (60%) Thursday night, rain likely (60%) Friday, showers likely (60%) Friday night and Saturday, a good (50%) chance of showers in the evening, then mostly cloudy with a good (50%) chance of rain late Saturday night and Sunday highs 46-49 lows 41-38. (seasonal averages high 53 low 40)

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Forecast for the Cascades of Lane County: Partly cloudy this AM (Presidents’ Day), mostly cloudy with a slight (20%) chance of snow this afternoon, snow tonight (2 in. of snow possible), cloudy with AM snow showers likely (70%) Tuesday, a good (50%) chance snow showers in the afternoon and evening, a slight (20%) chance of snow showers late Tuesday night and Wednesday AM, a mix of clouds and sun with a slight (20%) chance of snow Wednesday afternoon, then mostly cloudy with a good (50%) chance of snow Wednesday night snow level 3,000 ft. today, 2,500 ft. tonight, then at the surface Tuesday through Wednesday night highs 37-30 lows 24-20. Mostly cloudy with snow likely (70%) Thursday, a good (50%) chance of snow at night, snow likely (60%) Friday, rain and snow likely (60%) Friday night, snow likely (60%) Saturday, mostly cloudy with a good (50%) chance of snow showers Saturday night, then cloudy with a good (50%) chance of snow Sunday snow level at the surface Thursday and Thursday night, 2,500 ft. Friday, then at the surface Friday through Sunday highs near 28 lows 20-23.

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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 news on-line at Eugene Daily News.com.

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