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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 a (40%) chance of AM rain and drizzle, showers likely (70%) this afternoon (0.25 in. of rain possible), a slight (20%) chance of isolated evening showers, mostly cloudy with a (30%) chance of rain late tonight (0.10 in. of rain possible), rain (0.50 in. of rain possible) Monday (Memorial Day), showers likely (60%) Monday night (0.10 in. of rain possible) and Tuesday, then mostly cloudy with rain Tuesday night highs 64-60 lows near 49. Mostly cloudy with rain Wednesday, a good (50%) chance of showers at night and Thursday, a slight (20%) chance of showers Thursday night, just partly cloudy Friday and Friday night, then a mix of clouds and sun with a slight (20%) chance of showers 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 AM showers, showers this afternoon (0.10 in. of rain possible), a slight (20%) chance of showers this evening, a (40%) of rain late tonight (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 highs 64-62 lows 53-50. 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 this AM, coastal showers this afternoon while showers likely (60%) inland (0.10 in. of rain possible), a good (50%) chance of evening showers, rain late tonight (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 late Tuesday night highs near 57 lows 52-50. 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 with AM rain, showers this afternoon (0.25 in. of rain possible), a (40%) chance of rain tonight (0.10 in. of rain possible), mostly cloudy Monday (Memorial Day) with rain, showers Monday night, showers likely (60%) Tuesday, then mostly cloudy with rain likely (60%) Tuesday night snow level 6,500 ft. today through Monday night, 6,000 ft. Tuesday, then 6,500 ft. Tuesday night highs near 45 lows near 36. Mostly cloudy with rain Wednesday, 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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