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Sorry, but no winner this week. There were some chuckles out there about this one, but nobody answered it. Here is my weekly weather quiz question for the last time. Please define the term “backdoor cold front.” Here is the correct answer. A Back Door Cold Front is defined as a cold front moving south or southwest along the Atlantic seaboard and Great Lakes; these are especially common during the spring months. Here in the Pacific Northwest it is a cold front that drops down at us from the northeast or north, usually in the winter, spreading much colder air down at us from that unusual angle. 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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An upper level low (Shaded “U” shape, more like a donut), called a closed low because it is cut off from the upper air circulation, has taken over bringing rain and dropping temperatures drastically. This unsettled weather will continue for the rest of the week as the low rotates away from us. It looks like there will be rain for the rest of the weekend and the Memorial Day Holiday itself with temperatures below seasonal normal, so plan accordingly. It will feel the coldest near or on the water, sorry about that. A frontal system will be approaching the West Coast Wednesday. An upper level trough of low pressure (Shaded “U” shape dropping down through Southern California) will keep us in clouds with a chance of precipitation for the next 7 days.
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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 rain tonight (0.50 in. of rain possible), AM rain, showers likely (70%) Sunday (0.25 in. of rain possible), mostly cloudy with a (30%) chance of rain Sunday night (0.10 in. of rain possible), rain (0.50 in. of rain possible) Monday (Memorial Day), rain likely (60%) Monday night (0.10 in. of rain possible), showers likely (70%) Tuesday, then mostly cloudy with rain likely (60%) Tuesday night lows 52-48 highs near 62. AM rain likely (60%) Wednesday, showers in the afternoon, mostly cloudy with a good (50%) chance of showers at night and Thursday, a slight (20%) chance of showers Thursday night, then just partly cloudy Friday through Saturday highs 63-73 lows near 46. (seasonal averages high 69 low 45)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with showers tonight (0.30 in. of rain possible) and Sunday AM, showers Sunday afternoon (0.10 in. of rain possible), a slight (20%) chance of showers Sunday evening, a (40%) of rain late Sunday night (under 0.10 in. of rain possible), rain (0.25 in. of rain possible) Monday (Memorial Day), showers likely (70%) Monday night (0.10 in. of rain possible) and Tuesday AM, a good (50%) chance of showers in the afternoon, a good (50%) chance of evening rain, then mostly cloudy with rain likely (70%) Tuesday night lows 53-50 highs 64-62. Mostly cloudy with rain Wednesday AM, showers in the afternoon, mostly cloudy with a good (50%) chance of showers Wednesday night and Thursday, partly cloudy with a slight (20%) chance of showers Thursday night, mostly cloudy with a slight (20%) chance of showers Friday, then just partly cloudy Friday night and Saturday highs 62-72 lows near 48. (seasonal averages high 72 low 49)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with showers tonight, (0.45 in. of rain possible), showers Sunday AM, coastal showers in the afternoon while showers likely (60%) inland (0.10 in. of rain possible), a good (50%) chance of evening showers, rain late Sunday night (0.15 in. of rain possible), rain (0.40 in. of rain possible) Monday (Memorial Day), then showers likely (70%) Monday night (0.10 in. of rain possible)and Tuesday AM, a good (50 %) chance of showers Tuesday afternoon, a (40%) chance of rain in the evening, then rain likely (60%) late Tuesday night lows 52-50 highs near 57. Mostly cloudy with rain Wednesday AM, showers in the afternoon, mostly cloudy with a good (50%) chance of showers Wednesday night and Thursday, a slight (20%) chance of showers Thursday night and Friday, then just partly cloudy Friday night and Saturday highs 67-62 lows near 49. (seasonal averages high 60 low 48)
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Forecast for the Cascades of Lane County: Mostly cloudy rain increasing tonight (0.50 in. of rain possible), AM rain, showers Sunday afternoon (0.25 in. of rain possible), a (40%) chance of rain Sunday night (0.10 in. of rain possible), mostly cloudy Monday (Memorial Day) with rain and breezy (wind: S 15-25 mph), rain again Monday night, showers likely (60%) Tuesday, then mostly cloudy with rain likely Tuesday night snow level 7,500 ft. tonight, 6,500 ft. Sunday through Monday night, 6,000 ft. Tuesday, then 6,500 ft. Tuesday night lows near 36 highs near 45. Mostly cloudy with rain Wednesday AM, showers in the afternoon, cloudy with a good (50%) chance of showers at night, mostly cloudy with a good (50%) chance of rain and snow showers Thursday, mostly cloudy with a slight (20%) chance of showers Thursday night, a mix of clouds and sun with a slight (20%) of showers Friday, then just partly cloudy Friday night and Saturday snow level 6,000 ft. Wednesday, 5,500 ft. at night, 5,000 ft. Thursday, 6,000 ft. at night, 7,500 ft. Friday, then free air freezing level 9,000 ft. Friday night and Saturday highs 46-60 lows 33-38.
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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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