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The weak, flat high pressure ridge that brought the sunshine to the Valley early today is being replaced by low pressure (the “U” shaped dip in the jet stream over the Pacific Ocean). There will be some sunshine early in the week, Monday and Tuesday, but by Tuesday night and Wednesday a new frontal system will be moving through. If that’s not enough for you another frontal system will be approaching from the northwest by sometime Thursday .
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Advisories: NONE AT THIS TIME.
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The Updated Pollen Count Forecast for the Eugene-Springfield area : Trees LOW, Grass MODERATE, and weeds ABSENT. Data 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 with a (40%) chance of rain this evening and developing tonight low 53. Mostly cloudy with rain Sunday morning then a good (50%) chance of showers and a bit cooler in the afternoon, a slight (20%) chance of showers Sunday evening and partly cloudy late at night high 66 low 46. AM clouds then a mix of clouds and sun and warmer Monday, partly cloudy Monday night, and a mix of clouds and sun and even warmer Tuesday, partly cloudy in the evening, then mostly cloudy in with a slight (20%) chance of rain Tuesday night highs near 73-77 lows 49-52. Mostly cloudy with a (30%) chance of showers and cooler Wednesday through Thursday highs 65-67 low 48. Mostly cloudy with just a slight (20%) chance of showers Thursday night through Friday night lows 48-50 high 69. Mostly cloudy Saturday AM then a mix of clouds and sun and warmer with just a slight (20%) chance of showers high 72.
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Forecast for the Umpqua Basin including Roseburg: Cloudy with a good (50%) chance of rain this evening and rain at night and Sunday morning, then showers likely (60%) with a chance of afternoon and evening showers lows 57-53 high 72. Mostly cloudy Monday AM, partly cloudy in the afternoon, mostly cloudy in the evening and back to partly cloudy at night high 74 low 48. Mostly cloudy with a slight (20%) chance of rain and Tuesday afternoon and a (30%) chance of rain at night highs 75 low 54. Mostly cloudy with a (40%) chance of showers and cooler Wednesday, a slight (20%) chance Wednesday night and a (30%) chance of showers and even cooler Thursday highs 65-62 low 45. Mostly cloudy with a slight (20%) chance of showers Thursday night through Friday night and just mostly cloudy and a bit warmer Saturday lows 44-48 highs 66-72.
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with rain likely (60%) this evening at the shore and a (40%) chance of rain inland, then rain late at night low 52. Cloudy Sunday with AM rain and afternoon showers likely (60%), then mostly cloudy with a slight (20%) chance of evening showers at the shore and a (30%) chance of showers inland high 59 low 50. Just partly cloudy Monday through Tuesday morning then mostly cloudy with a slight (20%) chance of rain in the afternoon and a (40%) chance of rain Tuesday night highs 61-63 lows 50-53. Mostly cloudy with a (40%) chance of showers Wednesday, a slight (20%) chance Wednesday night, with a (40%) chance of showers and a bit cooler Thursday highs 60-54 low 44. A slight (20%) chance of showers Thursday night through Friday night and just mostly cloudy Saturday Friday low 47 high 62.
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Forecast for the Cascades of Lane County: Mostly cloudy with a (40%) chance of evening rain, then rain tonight snow level 8,000 ft. low 40. Mostly cloudy and breezy Sunday with morning rain and afternoon and evening showers and a slight (20%) chance of afternoon and evening thunderstorms, then a slight (20%) chance of showers late at night snow level above 8,000 ft. high 56 low 36. A mix of clouds and sun and warmer Monday with a slight (20%) chance of morning showers, just partly cloudy Monday night, and a mix of clouds and sun and even warmer Tuesday with a slight (20%) chance of afternoon showers snow level above 8,000 ft. Monday, free air freezing level 10,000 ft. Monday night and a snow level above 8,000 ft. Tuesday night highs 65-67 lows 40-44. Mostly cloudy with a slight (20%) chance of rain Tuesday night and a (40%) chance of rain and cooler Wednesday snow level 8,000 ft. falling to 7,000 ft. Wednesday low 42 high 58. Mostly cloudy with a (20%) chance of showers Wednesday night through Friday snow level 6,500 ft. Wednesday night falling to 5,500 ft. Thursday and Thursday night, and 6,000 ft. Friday lows 39-42 highs 50-56. Mostly cloudy with a slight (20%) chance of showers Friday night and AM clouds Saturday then a mix of clouds and sun in the afternoon with a slight (20%) chance of showers low 42 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.