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Advisories: NONE AT THIS TIME.
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An upper level trough of low pressure (“U” shape) has moved through the Pacific Northwest and will be followed by an even stronger low that will slide along the coast. That will keep us alternating between periods of clouds and cooler temperatures, and even some light rain or drizzle, then back to some more sunshine and warming temperatures. A frontal system approaches the coast today that will bring a chance of showers tonight through Saturday evening with clearing and warming behind it for the rest of the weekend into next week when there will be another cool down.
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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: Partly cloudy today and this evening, mostly cloudy with a (40%) chance of showers late tonight (under 0.10 in. of rain possible), mostly cloudy Saturday with a good (50%) chance of showers Saturday (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy late Saturday night through Sunday evening, then mostly cloudy Sunday night highs 79-70 warming to 75 Sunday lows 54-50. A mix of clouds and sun Monday, then partly cloudy Monday night through Thursday highs 78-72 warming back to 78 by Thursday lows near 50. (seasonal averages high 82 low 51)
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The Pollen forecast for the Eugene/Springfield Area is for trees and weeds to be low, and Grass to be moderste. (Provided by Allergy and Asthma Research Group)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy this AM, mostly sunny this afternoon, partly cloudy this evening, mostly cloudy with a slight (20%) chance of showers tonight, a (30%) chance of showers Saturday, a slight (20%) chance of evening showers, just mostly cloudy late Saturday night through Sunday night highs 80-74 warming back up to near 80 Sunday lows 59-52. Mostly cloudy with a slight (20%) chance of showers Monday and Monday night, mostly cloudy Tuesday AM, partly cloudy with a slight (20%) chance of showers Tuesday afternoon, partly cloudy with a slight (20%) chance of showers and drizzle Tuesday night and Wednesday, mostly clear in the evening, then partly cloudy with a slight (20%) chance of showers late Wednesday night through Thursday AM, then just partly cloudy Thursday afternoon highs near 80 lows near 54. (seasonal averages high 86 low 55)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy this AM, partly cloudy this afternoon, mostly cloudy with a good (50%) chance of showers tonight, a (30%) chance of showers Saturday, a slight (20%) chance of showers in the evening, mostly cloudy with patchy fog late Saturday night and Sunday AM, just mostly cloudy Sunday afternoon, then mostly cloudy with a slight (20%) chance of showers Sunday night highs near 65 lows 56-50. Mostly cloudy with a slight (20%) chance of showers Monday through Tuesday, mostly cloudy with a slight (20%) chance of showers and drizzle Tuesday night and Wednesday, a slight (20%) chance of showers Wednesday night and Thursday AM, then partly cloudy Thursday afternoon highs 63-66 lows 50-53. (seasonal averages high 67 low 53).
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Forecast for the Cascades of Lane County: Partly cloudy today and this evening, mostly cloudy with a (30%) chance of showers late tonight and Saturday AM, partly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms Saturday afternoon and evening (0.10 in. of rain possible, more in thunderstorms), a slight (20%) chance of showers late Saturday night and Sunday AM, a mix of clouds and sun with a slight (20%) chance of afternoon thunderstorms, then partly cloudy Sunday night free air freezing level 10,000 ft. today, snow level above 8,000 ft. tonight through Sunday, then a free air freezing level of 11,000 ft. Sunday night highs 70-57 warming to 65 Sunday lows near 42. A mix of clouds and sun Monday, then just partly cloudy Monday night through Thursday snow level above 8,000 ft. Monday, free air freezing level 11,000 ft. rising to 13,000 ft. and holding Monday night through Thursday highs 68-57 warming to near 70 Thursday lows near 42.
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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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