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Upper level low pressure (“U” shape offshore) is sliding slowly toward Oregon. Weak high pressure  will give us the clearing Memorial Day that we expected on Sunday. There will still be sun breaks on the rainy days. A new frontal system will push through the Pacific Northwest early in the week (position shown is Wednesday) increasing the precipitation chances once again and the wet weather will continue through most of next week. Still cooler than normal. Summer is getting closer every day, but we haven’t found the formula to turn the weather around to even average temperatures. Then we ask “Where is the sunshine?” It seems to be somewhere else.

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Advisories:  NONE AT THIS TIME.

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Here are your detailed forecasts. **

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy this evening with patchy drizzle continuing until about midnight, slow clearing starting very late tonight, a mix of clouds and sun with a (40%) chance of afternoon showers Monday (Memorial Day),  mostly cloudy with showers Monday night (0.25 in. of rain possible),  mostly cloudy with showers likely (60%) Tuesday and a slight (20%) chance of afternoon thunderstorms, partly cloudy with a (40%) chance of showers Tuesday night (under 0.10 in. of rain possible),  a mix of clouds and sun Wednesday with a good (50%) chance of showers and a slight (20%) chance of afternoon and evening thunderstorms (small hail possible), partly cloudy with a (40%) chance of showers Wednesday night lows 42-45 highs near 60. Partly cloudy with a (40%) chance of showers Thursday through Friday night, a mix of clouds and sun Saturday and Sunday and partly cloudy Saturday night highs 60-65 lows near 46. (seasonal  averages high  69 low 44)

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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with a slight (20%) chance of  showers this evening, a (30%) chance of showers Monday (Memorial Day),  showers likely (60%) Monday night and Tuesday AM (snow level 3,000 ft.), showers likely (60%) with a slight (20%) chance of thunderstorms Tuesday afternoon and evening,  a  good (50%) chance of showers late Tuesday night, mostly cloudy with a (40%) chance of showers Wednesday AM, a good (50%) chance of showers and a slight (20%) chance of thunderstorms Wednesday afternoon and evening, then a (40%) chance of showers late Wednesday night lows 44-47 highs 60-65. Mostly cloudy a (40%) chance of showers Thursday through Friday night, then mostly cloudy with a slight (20%) chance of showers Saturday through Sunday highs 64-74 lows near 48. (seasonal averages high 74 low 48)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy tonight with a slight (20%) chance of inland showers this evening, mostly cloudy with a  slight (20%) chance of showers Monday AM (Memorial Day), showers likely (60%) Monday afternoon and Monday night, coastal showers likely (60%) with a slight (20%) chance of thunderstorms Tuesday AM, showers likely (60%) in the afternoon, AM showers likely (60%) inland with a slight (20%) chance of afternoon thunderstorms, a (40%) chance of coastal showers Tuesday night and evening showers likely (60%) then a good (50%) chance of showers Tuesday night inland, a (40%) chance of AM showers Wednesday, a (40%) chance of showers and a slight (20%) chance of thunderstorms Wednesday night lows 44-48 highs 57-60. Mostly cloudy with a (40%) chance of showers Thursday through Friday night, then mostly cloudy with a slight (20%) chance of showers Saturday through Sunday highs 55-60 lows 47-50. (seasonal averages high 62 low 48).

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Forecast for the Cascades of Lane County: Mostly cloudy with a slight (20%) chance of showers tonight, a slight (20%) chance AM showers, showers becoming likely (60%) in the afternoon (under 0.10 in. of rain possible) Monday (Memorial Day), showers Monday night (0.25 in. of rain possible), showers Tuesday with a slight (20%) chance of  afternoon thunderstorms (1 in. of snow possible, 0.25 in. of rain possible, more in thunderstorms), showers likely Tuesday night (2 in. of snow possible. o.10 in. of rain possible), showers likely (60%) Wednesday with a slight (20%) chance of thunderstorms in the afternoon and evening, then a good (50%) chance of showers Wednesday night snow level 5,500 ft. tonight and Monday, 6,000 ft. Monday night, 5,500 ft. Tuesday, 5,000 ft. Tuesday night, 6,500 ft. Wednesday and Wednesday night lows 30-35 highs 47-40. Partly cloudy with a (40%) chance of showers Thursday, mostly cloudy with a (40%) chance of Thursday night through Friday night, mostly cloudy with a slight (20%) chance of showers Saturday and Saturday night, then  partly cloudy with a slight (20%) chance of showers Sunday snow level 5,000 ft. Thursday, 7,000 ft. Thursday night, 6,500 ft. Friday, then 7,000 ft. Friday night through Sunday highs 46-55 lows 34-37.

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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 EugeneDailyNews.com.

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