_______________
Check out my new Eugene Daily News column Weather or Not: TBA ASAP.
________________
Here is my new weekly weather quiz question. Please define the term “backdoor cold front.” 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.
________________
Upper level high pressure (Shaded “Arch” shape with blue arrows) cleared us out for a while returning the sunshine. An upper level low (Shaded “U” shape) is taking over pushing a frontal system at the Pacific Northwest bringing rain and dropping temperatures drastically by Tuesday.
________________
Advisories: None at this time.
________________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Increasing clouds to partly cloudy this evening, mostly cloudy with rain likely (70%) by late tonight (0.10 in. of rain possible), mostly cloudy with AM rain, showers and a lot cooler with some small hail possible Tuesday afternoon (0.25 in. of rain possible), showers with small hail possible Tuesday night (0.10 in. of rain possible), and again Wednesday (0.35 in. of rain possible), mostly cloudy with showers with small hail possible in the evening, then showers likely (70%) Wednesday night through Thursday night lows 45-42 warming to 45 Friday night highs 54-50 warming to 56 Friday. Mostly cloudy with showers likely (60%) Friday, a (40%) chance of showers Friday night, a mix of clouds and sun with a slight (20%) chance of showers Saturday, Sunday, and Monday (Memorial Day) while mostly cloudy with a slight (20%) chance of showers each night highs 65-70 lows near 45. (seasonal averages high 68 low 44)
________________
Forecast for the Umpqua Basin including Roseburg: Mostly clear this evening, increasing clouds to mostly cloudy with a good (50%) chance of rain late tonight, AM rain, showers and cooler Tuesday afternoon and evening (0.20 in. of rain possible), rain and snow showers late at night (snow level 3,000 ft. falling to 2,500 ft. late at night, 0.15 in. of rain possible), rain and snow showers Wednesday AM, showers in the afternoon (snow level 2,500 ft. rising to 3,500 ft. in the afternoon, 0.30 in. of rain possible), cloudy with a good (50%) chance of evening showers, then showers likely (70%) Wednesday night (snow level 3,500 ft.) through Thursday night lows 50-40 warming to 46 Thursday night highs 56-60. Mostly cloudy with showers likely (60%) and warmer Friday, partly cloudy with a (30%) chance of showers Friday night, partly cloudy with a slight (20%) chance of showers Saturday and Saturday night, mostly cloudy with a slight (20%) chance of showers Sunday and Monday (Memorial Day), partly cloudy at night highs 66-73 cooling to near 70 Monday lows 46-50 cooling to 45 Sunday night. (seasonal averages high 71 low 48)
_________________
Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear this evening inland with increasing clouds to mostly cloudy and a good (50%) chance of rain late tonight while partly cloudy in the evening and mostly cloudy with coastal rain likely (60%) late tonight (under 0.10 in. of rain possible), AM rain Tuesday, showers in the afternoon and evening (0.45 in. of rain possible), showers and a slight (20%) chance thunderstorms with small hail possible late Tuesday night and Wednesday AM, showers in the afternoon, coastal showers at night while showers likely (60%) Wednesday night inland, then mostly cloudy with showers likely (60%) Thursday and Thursday night lows 50-44 warming to 47 Thursday night highs 55-50 warming to 55 Thursday. Mostly cloudy with showers likely (60%) Friday, a (40%) chance of showers at night, partly cloudy with a slight (20%) chance of showers Saturday and Saturday night, mostly cloudy with a slight (20%) chance of showers Sunday and Monday (Memorial Day) while partly cloudy with a slight (20%) chance of showers at night highs 58-62 lows near 48. (seasonal averages high 59 low 48)
________________
Forecast for the Cascades of Lane County: Increasing clouds to partly cloudy this evening, mostly cloudy with a (40%) chance of rain late tonight (0.10 in. of rain possible), mostly cloudy with AM rain, showers and much cooler Tuesday afternoon with small hail possible (0.50 in. of rain possible), showers and colder Tuesday night with showers and small hail possible (0.25 in. of rain possible), mostly cloudy with showers Wednesday and in the evening, a good (50%) chance of rain and snow showers Wednesday night, then rain and snow showers likely (60%) Thursday and Thursday night snow level above 8,000 ft. tonight, 7,500 ft. falling to 5,500 ft. Tuesday afternoon, 4,000 ft. falling to 3,000 ft. late at night and Wednesday, 4,000 ft. Wednesday night and Thursday, then 5,000 ft. Thursday night lows 38-26 warming to near 32 Friday night highs 44-35 warming to 40 Friday. Mostly cloudy with rain and snow showers likely (60%) Friday, a (40%) chance of rain and snow showers Friday night, a mix of clouds and sun with a (30%) chance of showers Saturday, Sunday, and Monday (Memorial Day) while mostly cloudy with a slight (20%) chance of showers each night snow level 4,500 ft. Friday, 5,500 ft. Friday night, 6,000 ft. Saturday, 8,000 ft. at night, 7,000 ft. Sunday, 8,000 ft. at night, then 7,000 ft. Monday highs 45-55 lows 34-38.
________________
**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.
________________
Get your local Eugene-Springfield news on-line at Eugene Daily News.com.
________________