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Look for my latest Eugene Daily News column A Bolt From Out Of The Blue.

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Here is my new weekly weather quiz question. Please define the term “acid rain.” 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 high pressure ridge (shaded “Arch” shape) that has been dominating our weather pattern will move away from us slowly. Here’s the cold front that was a lot weaker than I expected so the rain chance for the Sunday pretty much dissolved. An upper level low (Shaded “U” shape) has moved up to the Oregon coast shifting the airflow from the southwest increasing our chances for rain today. Another cold front should be approaching the Oregon coast by Wednesday.

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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 AM rain likely (70%), showers and cooler this afternoon (0.25 in. of rain possible), a (40%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible), a mix of clouds and sun Tuesday, partly cloudy at night, a mix of clouds and sun with a slight (20%) chance of showers Wednesday, mostly cloudy with a sight (20%) chance of showers in the evening, then a (40%) chance of showers at night highs 65-70 lows 45-42 warming to 47 Wednesday night. Mostly cloudy with a good (50%) chance of showers Thursday, a (40%) chance of showers at night and Friday, mostly cloudy in the evening, partly cloudy with a slight (20%) chance of showers late at night, a mix of clouds and sun with a slight (20%) chance of rain Saturday, then mostly cloudy with a slight (20%) chance of showers Saturday night and Sunday highs 65-68 lows 47-42 warming to 46 Saturday night. (seasonal averages high 67 low 43)

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Forecast for the Umpqua Basin including Roseburg: Cloudy with rain likely (70%) this AM, a good (50%) chance of rain this afternoon (0.15 in. of rain possible), a (30%) chance of  showers tonight (under 0.10 in. of rain possible), mostly cloudy Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy Tuesday night, a slight (20%) chance of showers Wednesday, then mostly cloudy with a  (30%) chance of showers Wednesday night highs 67-72 lows 44-50. Mostly cloudy with a (30%) chance of showers Thursday through Friday, then mostly cloudy with a slight (20%) chance of showers Friday night through Sunday highs 67-72 lows 52-45 warming to 50 Sunday. (seasonal averages high 70 low 47)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with rain likely (60%) in the AM, a (40%) chance of rain this afternoon (0.15 in. of rain possible), a (30%) chance of showers tonight with patchy fog late (under 0.10 in. of rain possible), mostly cloudy with patchy fog Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy at night, a slight (20%) chance of showers Wednesday, then mostly cloudy with a (30%) chance of showers Wednesday night highs 58-62 lows 46-52. Mostly cloudy with a good (50%) chance of showers Thursday through Friday, then mostly cloudy with a slight (20%) chance of showers Friday night through Sunday highs 60-57 lows 52-46 warming to near 50 Sunday. (seasonal averages high 59 low 47)

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Forecast for the Cascades of Lane County: Cloudy with a (40%) chance of rain this AM, showers likely (70%) this afternoon (0.25 in. of rain possible), a good (50%) chance of showers and cooler tonight, a mix of clouds and sun Tuesday, partly cloudy Tuesday night, partly cloudy with a slight (20%) chance of showers Wednesday afternoon, mostly cloudy with a slight (20%) chance of evening showers, then a good (50%) chance of showers late Wednesday night snow level above 8,000 ft. today, 5,500 ft. tonight, free air freezing level 6,500 ft. Tuesday, 8,000 ft. Tuesday night, snow level 8,000 ft. Wednesday, then 7,500 ft. Wednesday night highs 54-58 lows 33-38. Mostly cloudy with a good (50%) chance of rain Thursday, a good (50%) chance of showers Thursday night and Friday, mostly cloudy with a slight (20%) chance of showers Friday night, a mix of clouds and sun with a (30%) chance of showers Saturday, mostly cloudy with a slight (20%) chance of showers at night, the a mix of clouds and sun with a slight (20%) chance of showers Sunday free snow level 7,500 ft. Thursday, 8,000 ft. Thursday night, 7,000 ft. Friday through Saturday, 8,000 ft. at night, then 7,000 ft. Sunday highs 52-54 lows near 37.

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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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