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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 is on the way to hit us just in time for today, Memorial Day. 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 isolated evening showers, a (40%) chance of rain late tonight (0.10 in. of rain possible), rain (0.60 in. of rain possible) Monday (Memorial Day), rain Monday night (0.10 in. of rain possible), AM showers likely (60%) Tuesday, a mix of clouds and sun with a good (50%) chance of showers in the afternoon (under 0.10 in. of rain possible), mostly cloudy a good (50%) chance of evening showers, rain late Tuesday night (0.15 in. of rain possible) and Wednesday AM, showers likely (70%) in the afternoon, then mostly cloudy with a good (50%) chance of showers Wednesday night lows near 48 highs 62-64 cooling to near 60 Wednesday. A mix of clouds and sun with a slight (20%) chance of showers Thursday, partly cloudy at night, a mix of clouds and sun Friday, partly cloudy at night, a mix of clouds and sun with a slight (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of evening showers, then partly cloudy Saturday night and Sunday highs 65-75 lows 45-48. (seasonal averages high 69 low 45)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with a slight (20%) chance of showers this evening, rain late tonight (under 0.10 in. of rain possible), rain (0.30 in. of rain possible) Monday (Memorial Day), showers in the evening, a good (50%) chance of showers Monday night (0.10 in. of rain possible), showers likely (60%) Tuesday AM, a good (50%) chance of showers in the afternoon (under 0.10 in. of rain possible), a good (50%) chance of evening rain, rain late Tuesday night (0.10 in. of rain possible), mostly cloudy with rain Wednesday AM, showers likely (70%) in the afternoon, mostly cloudy with a good (50%) chance of showers Wednesday night lows 53-50 highs 64-62. Mostly cloudy with a (40%) chance of showers Thursday, a slight (20%) chance of evening showers, partly cloudy late Thursday night, mostly cloudy Friday, just partly cloudy Friday night, partly cloudy with a slight (20%) chance of showers Saturday and Saturday night, then just partly cloudy Sunday 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 a good (50%) chance of evening showers, rain late tonight (0.15 in. of rain possible), rain (0.50 in. of rain possible) Monday (Memorial Day) and breezy (wind: S 10-20 mph increasing to S 20-30 mph at the shore and S 10-20 mph inland), coastal showers in the evening and a good (50%) chance of showers late at night while evening showers and and showers likely (70%) inland Monday night (0.10 in. of rain possible), mostly cloudy with showers likely (60%) Tuesday AM, a slight (20%) chance of showers Tuesday afternoon (0.10 in. of rain possible), a (40%) chance of rain in the evening, rain late Tuesday night (0.20 in. of rain possible), rain Wednesday AM, showers likely (60%) in the afternoon, then mostly cloudy with a good (50%) chance of showers Wednesday night lows 52-49 highs 55-60 cooling to 55 Wednesday. Mostly cloudy with a (30%) chance of showers Thursday, mostly cloudy in the evening, partly cloudy late Thursday night, mostly cloudy Friday, just partly cloudy Friday night, partly cloudy with a slight (20%) chance of showers Saturday and Saturday night, then just partly cloudy Sunday highs 60-62 lows near 49. (seasonal averages high 60 low 48)
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Forecast for the Cascades of Lane County: Mostly cloudy with a (40%) chance of scattered showers this evening, a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible), mostly cloudy Monday (Memorial Day) with rain (0.50 in. of rain possible), rain (0.25 in. of rain possible) Monday night, AM showers likely (60%) Tuesday, a mix of clouds and sun with a good (50%) chance of afternoon showers, mostly cloudy with rain late at night and Wednesday AM, showers likely (60%) in the afternoon and evening, then cloudy with a good (50%) chance of showers late Wednesday night snow level 6,500 ft. tonight, 7,000 ft. Monday, 6,500 ft. Monday night, 6,000 ft. Tuesday, 6,500 ft. Tuesday night, then 6,000 ft. Wednesday and Wednesday night lows 37-34 highs 48-43. A mix of clouds and sun with a (40%) chance of rain and snow showers Thursday, partly cloudy with a slight (20%) chance of showers Thursday night, just partly cloudy Friday and Friday night, partly cloudy with a slight (20%) chance of showers Saturday through Sunday AM, then just partly cloudy Sunday afternoon snow level 5,000 ft. Thursday, 6,500 ft. at night, free air freezing level 10,000 ft. Friday and Friday night, snow level above 8,000 ft. Saturday through Sunday AM, then free air freezing level 12,000 ft. Sunday afternoon highs 49-60 lows 33-40.
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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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