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Advisories: A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 8 AM SUNDAY FOR THE SOUTH CENTRAL OREGON COAST. A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON SUNDAY FOR THE CENTRAL AND SOUTH WILLAMETTE VALLEY. A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 8 AM MONDAY FOR THE SOUTH CENTRAL OREGON COAST. AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 6 PM NEXT MONDAY FOR THE ENTIRE I-5 CORRIDOR FROM PORTLAND SOUTH THROUGH EUGENE, AND FOR THE WESTERN COLUMBIA GORGE. AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM NEXT WEDNESDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
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A high pressure ridge (“Arch” shape on the jet stream) is planted offshore and the airflow will keep us in the sunshine, as long as the fog clears. So, for the better part of the next week we’ll see sunshine after the late night and early AM fog and freezing fog clear out. That also means that our air quality is suffering with the sinking air of high pressure holding on to the pollutants at the surface.
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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 this evening, mostly cloudy with patchy evening fog and freezing fog increasing late night and early Sunday AM (under 0.25 mile visibility possible), a mix of clouds and sun in the afternoon with lingering afternoon fog, partly cloudy in the evening, mostly cloudy with areas of fog increasing late Sunday night and Monday AM, mostly sunny in the afternoon, partly cloudy in the evening, cloudy with increasing areas of fog, late Monday night and Tuesday AM, partly cloudy in the afternoon, mostly cloudy with patchy evening fog, then increasing areas of fog late Tuesday night lows near 28 highs near 40-42. AM clouds and patchy fog Wednesday, partly cloudy in the afternoon and evening with lingering fog, mostly cloudy with areas of fog late Wednesday night and Thursday AM, partly cloudy in the afternoon and evening, mostly cloudy Thursday night, a mix of clouds and sun Friday, partly cloudy Friday night, then a mix of clouds and sun with a slight (20%) chance of showers Saturday afternoon highs 45 lows near 32. (seasonal averages high 47 low 35)
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Forecast for the Umpqua Basin including Roseburg: Clear this evening, mostly cloudy with patchy fog and freezing fog late at night and early in the AM, partly cloudy Sunday afternoon, clear in the evening with patchy fog, areas of fog and freezing fog Sunday night and Monday AM, partly cloudy Monday afternoon, clear in the evening mostly cloudy with patchy fog and freezing fog late Monday night and Tuesday AM, mostly sunny in the afternoon, patchy evening fog, mostly clear with areas of freezing fog late Tuesday night lows 30-32 highs near 46. Patchy AM fog, sunny Wednesday afternoon, mostly clear Wednesday night, patchy fog and partly cloudy Thursday, mostly clear Thursday night, mostly sunny Friday, mostly clear Friday night, then partly cloudy Saturday highs 48-42 lows 33-29 warming to 32 Saturday. (seasonal averages high 49 low 38)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Clear with areas of patchy fog late tonight, areas of frost and patchy fog Sunday AM with freezing fog inland, sunny Sunday afternoon, clear with patchy fog and areas of freezing fog again Sunday night and Monday AM, sunny in the afternoon, clear with patchy coastal fog Monday night, AM freezing fog, sunny Tuesday afternoon, mostly clear with patchy evening fog, then areas of freezing fog late Tuesday night lows 32-37 highs 49-52. Patchy AM fog, sunny Wednesday afternoon, partly cloudy Wednesday night, patchy AM fog, partly cloudy Thursday afternoon and Thursday night, sunny Friday, partly cloudy Friday night, then mostly cloudy Saturday highs near 50 lows 38-32. (seasonal averages high 52 low 40).
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Forecast for the Cascades of Lane County: Clear tonight, sunny Sunday and Monday, clear Sunday night, mostly clear Monday night, mostly sunny Tuesday, then mostly clear Tuesday night free air freezing level 8,000 ft. falling to 7,500 ft. tonight, 7,000 ft. Sunday, 6,500 ft. Sunday night, 7,500 ft. Monday, 7,000 ft. Monday night and Tuesday, then 8,000 ft. Tuesday night lows 24-29 highs 38-43 cooling to 39 Tuesday night. Mostly sunny Wednesday and Thursday with mostly clear nights, partly cloudy Friday and Friday night, then a mix of clouds and sun with a slight (20%) chance of rain and snow showers Saturday free air freezing level 8,000 ft. Wednesday, 7,000 ft. Wednesday night, 6,500 ft. Thursday, 7,000 ft. Thursday night and Friday, 7,500 ft. Friday night, then snow level 5,500 ft. Saturday highs 44-32 warming to 38 by Saturday lows near 25.
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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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Get your local Eugene-Springfield news on-line at Eugene Daily News.com.
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