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The jet stream shows a trough of low pressure ( “U” shaped area) swinging in toward the Pacific Northwest. The low pressure offshore along with a surface frontal system will be giving us at least a chance of showers.  Additional storms will be aiming for us like this frontal system that will roll in Wednesday.

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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 with a good (50%) chance of showers tonight (0.10 in. of rain possible), cloudy with a good (50%) chance of showers Monday AM,  showers likely (60%) Monday afternoon (0.10 in. of rain possible), cloudy with a (40%) chance of showers Monday night (0.10 in. of rain possible), mostly cloudy with a (40%) chance of showers Tuesday (0.10 in. of rain possible), just mostly cloudy Tuesday evening, then partly cloudy with a good (50%) chance of showers Tuesday night lows near 40 highs 50-55. Mostly cloudy with showers likely (60%) Wednesday through Friday night, a good (50%) chance of showers Saturday, then showers likely (60%) Saturday night and Sunday highs 55-48 lows 42-36. (seasonal  averages high 57 low 37)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly cloudy with showers likely (60%) tonight (snow level 3,500 ft. falling to 3,000 ft. late), showers likely (60%) Monday (snow level 3,000 ft. falling to 2,500 ft.), then mostly cloudy with a good (50%) chance of showers Monday night (snow level 2,500 ft.), a (40%) chance of rain Tuesday (snow level 2,500 ft.) and Tuesday night (snow level 3,000 ft. rising to 3,500 ft.) lows near 40 highs 50-54. Mostly cloudy with a good (50%) chance of rain Wednesday, rain Wednesday night, showers Thursday, showers Thursday through Friday night, cloudy with a good (50%) chance of showers Saturday, mostly cloudy with showers likely (60%) Saturday night, then a good (50%) chance of showers Sunday highs 54-57 lows near 40. (seasonal averages high 60 low 39)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with showers likely (60%) tonight, coastal showers Monday and showers likely (60%) inland, a (30%) chance of showers Monday night and Tuesday, then a (40%) chance of showers Tuesday night lows 40-42 highs 48-54. Mostly cloudy with a good (50%) chance of rain Wednesday, rain likely (60%)  Wednesday night, showers Thursday through Friday, showers likely (60%) Friday night, cloudy with  a good (50%) chance of showers Saturday, showers likely (60%) Saturday night, then mostly cloudy with a good (50%) chance of showers Sunday highs 50-55 lows hovering between 42-44. (seasonal averages high 56 low 42).

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Forecast for the Cascades of Lane County:  Mostly cloudy with rain and snow showers likely (60%) tonight (1-3 in. of snow possible) and Monday (2 in. of snow possible), cloudy with snow showers likely (60%) Monday evening, a good (50%) chance of snow showers late at night (1 in. of snow possible), a (40%) chance of snow showers Tuesday, mostly cloudy with a (40%) chance of evening snow showers, then a (30%) chance of snow showers late Tuesday night snow level 4,500 ft. falling to 4,000 ft. tonight, 3,500 ft. falling to 3,000 ft. Monday afternoon, 2,500 ft. Monday night and Tuesday, then 3,000 ft. by Tuesday evening lows near 28 highs 35-39. Mostly cloudy with rain and snow showers likely (60%) Wednesday and Wednesday night, a good (50%) chance of rain and snow showers Thursday and Thursday night, snow showers likely (60%) Friday, rain and snow showers likely (60%) Friday night, a good (50%) chance of rain and snow showers Saturday and Saturday night, then rain and snow showers likely (60%) Sunday snow level 2,500 ft. rising to 3,500 ft. Wednesday, 4,500 ft. Wednesday night and Thursday, 4,000 ft. Thursday night, 3,000 ft. Friday, 3,500 ft. Friday night, 4,000 ft. Saturday, 4,500 ft. Saturday night, and 4,000 ft. Sunday highs 42-37 lows 32-26.

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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.