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An upper level trough of low pressure (Shaded “U” area with blue arrows) is following the one that has been over us keeping Oregon  under a wet and colder than normal weather pattern.  A frontal system well offshore is poised to move in and bring back the rainy weather. A warm front will move in first. Another frontal system looks like it will give us more serious rain for early next week.

Advisories: NONE AT THIS TIME.

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The Updated Pollen Count Forecast for the Eugene-Springfield area : Trees and Grass MODERATE, weeds Absent.

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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 slight (20%) chance of showers this evening, mostly cloudy Monday and Monday and Monday night with a slight (20%) chance of evening, then a good (50%) chance of rain late at night lows 42-46 high 65. Mostly cloudy Tuesday with a (40%) chance of AM rain and afternoon rain likely (60%) and a bit cooler then showers likely (60%) at night high 60 low 45. Mostly cloudy with showers likely (60%) Wednesday and a slight (20%) chance of afternoon and evening thunderstorms then a good (50%) chance of showers Wednesday night high 60 low 42. Mostly cloudy Thursday through Friday with a good (50%) chance of showers Thursday and a (40%) chance Thursday night and Friday highs 60-57  low 42. Mostly cloudy Friday evening then partly cloudy with a (30%) chance of showers Friday night and Saturday low 43 high 65. Partly cloudy with a slight (20%) chance of showers Saturday night then a mix of clouds and sun and a bit warmer Sunday low 45 high 68 .

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Forecast for the Umpqua Basin including Roseburg:  Mostly cloudy tonight low 42. A slight (20%) chance of showers Monday AM with a slight (20%) chance of showers and a slight (20%) chance of afternoon rain and a (40%) chance of rain Monday night low 46 high 63. Mostly cloudy with rain likely (60%) Tuesday morning, then rain in the afternoon  and evening and showers likely late Tuesday night high 62 low 45. Mostly cloudy with showers likely (60%) Wednesday and Wednesday evening then a good (50%) chance of showers and warmer through Friday highs 60-67 lows 45-42. Mostly cloudy with a (40%) chance of showers Friday night and Saturday, then just a slight (20%) chance of showers Saturday night and Sunday  lows 46-42 (warmer) highs 72-75.

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Mostly cloudy tonight and Monday with a slight (20%) chance of rain Monday and a good (50%) chance of rain at night lows 43-47 high 60. Mostly cloudy with rain likely (60%) Tuesday morning and rain in the afternoon, then evening rain with a good (50%) chance of coastal showers late at night and showers likely (60%) late Tuesday night inland  high 56 low 47. Showers likely (60%) Wednesday and Wednesday night, then cloudy with a (50%) chance of showers Thursday through Friday highs 53-58 lows 49-44. Mostly cloudy with a good (50%) chance of showers Friday night and Saturday  and a slight (20%) chance of showers Saturday night and Sunday lows near 45 highs 63-65 .

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Forecast for the Cascades of Lane County: Mostly cloudy with a (40%) chance of  showers this evening and a slight (20%) chance of showers late at night snow level 4,000 ft. falling to 3,500 ft. at night low near 30. Mostly cloudy Monday AM then a mix of clouds and sun in the afternoon, mostly cloudy Monday night with a slight (20%) chance of rain late  free air freezing level 5,000 ft. rising to 6,000 ft. in the afternoon and a snow level of  5,500 ft. at night high 50 low 34. Mostly cloudy with a good (50%) chance of AM rain Tuesday then likely (60%) in the afternoon, Tuesday night and Wednesday morning and afternoon snow level 6,000 ft. falling to 5,500 ft. at night and 5,000 ft. Wednesday highs 52-47 low 34. Mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of evening thunderstorms and  a (60%) of showers Wednesday night snow level 5,000 ft. low 30. Mostly cloudy with rain and snow showers likely (60%) and cooler Thursday and a good (50%) chance of showers Thursday night snow level 5,000 ft. high 44 low 29. A good (50%) chance of rain and snow showers Friday through Saturday snow level 5,000 ft. falling to 4,500 ft. Friday night highs 44 to near 50 low 29. Mostly cloudy with a slight (20%) chance of showers Saturday night then mostly cloudy Sunday AM and a mix of clouds and sun and warmer with a slight (20%) chance of showers snow level 5,000 ft. low 34 high 57 .

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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.