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An upper level low is still spinning around offshore (see the blue arrows moving in a counterclockwise direction), but it is moving slowly to the North. High pressure takes over for today for a nice day then low pressure will be bringing with it a chance for some precipitation. A new frontal system will move in Monday bringing the rain and as you can see by Tuesday it will be past us.
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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: AM clouds with a mix of clouds and sun today then partly cloudy this evening and mostly cloudy late tonight high 70 low 45. Rain likely (60%) and cooler Monday and Monday night then showers likely (60%) Tuesday highs 65-55 low 39. Mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday low 36 high 54. Just a slight (20%) chance of showers Wednesday night then a (30%) chance of showers Thursday through Saturday highs 63-59 lows 37-40.
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Forecast for the Umpqua Basin including Roseburg: Partly cloudy today after some patchy AM fog and warm high 74. Mostly cloudy tonight, then rain a (40%) chance of showers Monday morning and rain and cooler Monday and Monday night with a slight (20%) chance of a thunderstorm in the late afternoon and early evening lows 47-43 high 67. AM rain then showers likely (60%) Tuesday and a (40%) chance of showers Tuesday night and Wednesday highs 54-58 low 36. Just a slight (20%) chance of showers Wednesday night and Thursday low 37 high 62. Mostly cloudy with a (30%) chance of showers Thursday night and a slight (20%) chance Friday low 39 highs 66 . Mostly cloudy with a slight (20%) chance of showers Friday night and a (40%) chance of showers Saturday low 40 high 67.
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Forecast for the South Oregon Coast including Coos Bay and North Bend: AM fog and mostly cloudy this morning then partly cloudy today high 63. Mostly cloudy with a (30%) chance of rain late tonight low 45. Mostly cloudy and cooler with showers likely (60%) Monday morning then rain in the afternoon and Monday night high 57 low 44. Mostly cloudy with a good (50%) chance of showers Tuesday, (40%) Tuesday night and (30%) Wednesday highs 55-57 low 40. Just a slight slight (20%) chance of showers Wednesday night and Thursday low 37 high 56. Mostly cloudy with a(30%) chance of showers Thursday night and Friday and a (40%) chance Saturday lows near 36-40 highs 55-58.
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Forecast for the Cascades of Lane County: Mostly cloudy today and warmer free air freezing level 9,000′ in the afternoon then partly cloudy in the evening and mostly cloudy late at night free air freezing level 9,000′ high near 63 low 38. Rain likely (60%) and cooler Monday with a slight (20%) chance of a thunderstorm then rain Monday night snow level 7,000′ falling to 5,000′ at night high 54 low 28. Mostly cloudy rain and snow showers likely (60%) Tuesday and a (40%) chance Tuesday night snow level 4,500′ falling to 4,000′ high 39 low 23. Mostly cloudy with a (40%-30%) chance of rain and snow showers Wednesday through Saturday snow level 4,500′ falling to 4,000′ Saturday highs 43-56 cooling to 48-45 Friday and Saturday lows 24-29.
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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.