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Upper level low pressure (“U” shape offshore) is sliding to the South and will move Eastward changing our airflow from Westerly to Easterly sending warmer dry air at us from the East and Southeast. A frontal system has moved through Northern California, but not as far to the South as I expected. Thats why the clouds moved Saturday afternoon and they capped off the high temperature for the Eugene-Springfield area to slightly lower levels than predicted, but still much warmer than normal. Next week we will return to well below normal temperatures and precipitation. One frontal system will move in Tuesday cooling temperatures and bringing showers, then yet another frontal system slides in Friday.
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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: A mix of clouds and sun today with a slight (20%) chance of thunderstorms this afternoon and evening, becoming mostly cloudy late tonight with a slight (20%) chance of showers, mostly cloudy and cooler Monday with a (30%) chance of showers (under 0.10 in. of rain possible) , a slight (20%) chance of showers Monday night, a mix of clouds and sun and even cooler Tuesday with a slight (20%) chance of showers, then mostly cloudy with a slight (20%) chance of showers Tuesday night highs 75-62 lows 50-43. A mix of clouds and sun with a slight (20%) chance of showers Wednesday, mostly cloudy Wednesday night, a mix of clouds and sun Thursday, partly cloudy in the evening, mostly cloudy Thursday night, back to a mix of clouds and sun Friday and Saturday, with partly cloudy skies Friday evening, then mostly cloudy late Friday night highs 65-77 cooling to 65 Saturday lows 42-46. (seasonal averages high 71 low 45)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with a slight (20%) chance of showers this AM, a good (50%) chance of showers and a slight (20%) chance of thunderstorms this afternoon and evening, a slight (20%) chance of showers late tonight and Monday, a slight (20%) chance of showers and cooler Monday night, mostly cloudy Tuesday AM, partly cloudy Tuesday afternoon with a slight (20%) chance of showers, partly cloudy in the evening, then mostly cloudy Tuesday night highs 75-69 lows 55-47. Mostly cloudy with a slight (20%) chance of showers Wednesday, just mostly cloudy Wednesday night and Thursday, then partly cloudy Thursday night through Friday evening, , mostly cloudy Friday night and Saturday with a slight (20%) chance of showers Saturday highs 67-74 cooling to 69 Saturday lows near 48. (seasonal averages high 75 low 49)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with a slight (20%) chance of AM showers inland, a (30%) chance of showers this afternoon, mostly cloudy tonight with a slight (20%) chance of inland showers and a slight (20%) chance of coastal showers late at night, mostly cloudy in the AM partly cloudy in the afternoon with a slight (20%) chance of showers Monday and Monday night, mostly cloudy AM, partly cloudy with a slight (20%) chance of showers Tuesday afternoon, partly cloudy Tuesday evening, mostly cloudy Tuesday night highs 62-55 lows 52-45. Mostly cloudy with a slight (20%) chance of showers Wednesday, just mostly cloudy Wednesday night and Thursday, then partly cloudy Thursday evening, then mostly cloudy Thursday night and Friday, mostly cloudy with a slight (20%) chance of showers Friday night and Saturday highs near 60 lows near 46. (seasonal averages high 63 low 49).
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Forecast for the Cascades of Lane County: Mostly cloudy with a slight (20%) chance of a shower this AM, thunderstorms likely (60%) today and this evening (0.10 in. of rain possible, more in thunderstorms), a (40%) chance of showers late tonight (0.25 in. of rain possible, more in thunderstorms), mostly cloudy with a good (50%) chance of showers and cooler Monday (0.25 in. of rain possible), a (40%) chance of showers Monday night (under 0.10 in. of rain possible), then mostly cloudy with a slight (20%) chance of showers Tuesday night snow level above 8,000 ft. today through Monday, 8,000 ft. Monday night and Tuesday, then 6,500 ft. Tuesday night highs 60-49 lows 40-33. A mix of clouds and sun with a slight (20%) chance of showers Wednesday, a slight (20%) chance of showers Wednesday through Friday, mostly cloudy with a slight (20%) chance of showers each night, partly cloudy Friday evening, mostly cloudy Friday night, then a mix of clouds and sun Saturday with just a slight (20%) chance of showers snow level 6,500 ft. Wednesday, 7,000 ft. Wednesday night and Thursday, 8,000 ft. Thursday night and Friday, 7,000 ft. Friday night, then above 8,000 ft. Saturday highs 49-58 falling to 54 Saturday lows 32-35.
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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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