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A trough of low pressure is south of us (the shaded “U” ) and it has kept us cooler than normal and a bit wet. The high pressure ridge north of it ( “arch” shape in blue arrows) and a surface high are weakening. Another upper level low will approach us bringing back the chance of rain as a weak disturbance ( just off the California coast) slides into California today. The upper level low pressure trough and a new frontal system early in the week will bring back the cooler than normal and and damp weather for off and on unsettled conditions next week.
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Advisories: NONE AT THIS TIME
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The Pollen Count Forecast for the Eugene-Springfield area : Trees HIGH, Grass and Weeds ABSENT. From Allergy and Asthma Research Group.
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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 morning and mostly cloudy, some sun peeks, with a slight (20%) chance of showers this afternoon and mostly cloudy with a slight (20%) chance of showers this evening and showers likely (60%) at night high 63 low 42. Mostly cloudy with showers likely (60%) and cooler Monday, a (40%) chance Monday evening and a slight (20%) chance of showers Monday night, and mostly cloudy with a slight (20%) chance of showers and warmer Tuesday highs 57-63 low 36. Partly cloudy Tuesday night then a mix of clouds and sun and warmer Wednesday low 40 high near 70. Partly cloudy Wednesday night, a mix of clouds and sun Thursday, partly cloudy Thursday night, and a mix of clouds and sun Friday lows 42-44 highs 72-64. Partly cloudy just a slight (20%) chance of showers Friday night and a mix of clouds and sun and warmer Saturday low 43 high 65.
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with isolated showers this morning then scattered showers this afternoon and evening with showers likely (60%) late at night high 65 low near 42. Mostly cloudy with rain Monday and a (40%) chance of showers Monday night snow level 3,500 ft. high 56 low 44. Mostly cloudy with slight (20%) chance of showers Tuesday, mostly cloudy Tuesday night then partly cloudy and warmer Wednesday highs 64-72 low 45. Just mostly cloudy Wednesday night through Friday lows 44-47 highs 72-67. Mostly cloudy with a slight (20%) chance of showers Friday night then mostly cloudy and warmer Saturday low 47 high 75.
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy today with isolated showers through this evening and showers likely (60%) at night high 60 low 43 . Mostly cloudy with rain Monday and a (40%) chance of showers Monday night high 56 low 45. Mostly cloudy and warmer Tuesday and Tuesday night and partly cloudy Wednesday highs 55-60 lows 45-47. Mostly cloudy Wednesday night through Friday lows 45-49 highs 55-60. Mostly cloudy with a slight (20%) chance of showers Friday night and mostly cloudy Saturday low 47 high 63.
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Forecast for the Cascades of Lane County: More clouds with a slight (20%) chance of showers this morning mainly south toward Willamette Pass, then a slight (20%) chance of showers and a slight (20%) chance of thunderstorms this afternoon, snow level 5,500 ft. and evening then rain and snow showers likely by late tonight and colder snow level 4,500 ft. falling to 3,500 ft. tonight lows near 30 high 50. Mostly cloudy with rain and snow showers likely (60%) Monday and a (40%) chance of rain and snow showers Monday night and a slight (20%) chance Tuesday snow level 3,000 ft. Monday, 3,500 ft. Monday night and 4,000 ft. rising to 5,500 ft. Tuesday afternoon highs 40-50 low 24. Partly cloudy with a slight (20%) chance of showers Tuesday night, then a mix of clouds and sun Wednesday, and partly cloudy Wednesday night snow level 5,500 ft. Tuesday night, and a free air freezing level rising to 9,000 ft. Wednesday and Wednesday night lows near 30 highs 52-62 . Partly cloudy with a slight (20%) chance of showers Thursday through Saturday snow level 8,000 ft. highs 55-59 lows 30-33.
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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.