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Check out my newest column for the Eugene Daily News “Some More Things Oregon Doesn’t Have”.
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Here is my new weekly weather quiz question. What is the difference between “Onshore Flow” and “Offshore Flow?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.
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An upper level trough of low pressure (shaded “U”shape) is sliding eastward and will keep the clouds and precipitation with us. High pressure (shaded “Arch” shape) gave us some drying time. The next frontal system is returning the clouds late tonight and rain Wednesday. The jet stream will set up in Zonal Flow which means the moisture feed will be moving pretty much on a straight line from West to East. A surface frontal system (position shown is Friday) will approach the Pacific Northwest in the middle of the week increasing the chance of showers from Wednesday forward.
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Advisories: NONE AT THIS TIME.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Cloudy with rain today (0.25 in. of rain possible), scattered showers tonight (under 0.10 in. of rain possible), a slight (20%) chance of showers Thursday, just partly cloudy with patchy fog Thursday night and Friday AM, mostly cloudy Friday afternoon, then mostly cloudy with rain likely (60%) Friday night highs 60-56 warming to 62 Friday lows 38-34 warming to 42 Friday night. Mostly cloudy with showers likely (60%) Saturday, a good (50%) chance of showers at night, showers likely (60%) Sunday, a good (50%) chance of showers Sunday night, then mostly cloudy with a (40%) chance of showers Monday through Tuesday highs 53-58 lows 37-32 warming to 36 Monday night. (seasonal averages high 60 low 39)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with a good (50%) chance of rain this AM, rain this afternoon (under 0.10 in. of rain possible), mostly cloudy with evening showers, a (30%) chance of showers late tonight (0.15 in. of rain possible), a slight (20%) chance of showers Thursday AM, just partly cloudy Thursday afternoon, mostly clear in the evening, partly cloudy late Thursday night and Friday AM, mostly cloudy in the afternoon, then mostly cloudy with a (40%) chance of rain Friday night highs 62-64 lows 43-38 warming to 32 Friday night. Mostly cloudy with showers likely (60%) Saturday, a (40%) chance of showers Saturday night, showers likely (60%) Sunday, a (40%) chance of showers Sunday night, a (40%) chance of rain and snow showers Monday, mostly cloudy with a (30%) chance of showers at night, then partly cloudy with a (30%) chance of showers Tuesday highs 54-62 lows 42-36. (seasonal averages high 61 low 41)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with a good (50%) chance of AM rain, rain this afternoon (0.20 in. of rain possible), showers likely (60%) in the evening, a (30%) chance of showers late tonight (0.15 in. of rain possible), mostly cloudy with a slight (20%) chance of showers Thursday AM, just partly cloudy Thursday afternoon, mostly clear in the evening, partly cloudy Thursday night, then mostly cloudy Friday, evening rain, then a a good (50%) chance of rain late Friday night highs near 54 lows 44-40 warming to 45 Friday night. Mostly cloudy with showers likely (60%) Saturday, a good (50%) chance of showers Saturday night, showers likely (60%) Sunday, mostly cloudy with a Sunday night through Monday night, then partly cloudy with a (30%) chance of showers Tuesday highs 50-55 lows near 40. (seasonal averages high 55 low 43)
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Forecast for the Cascades of Lane County: Mostly cloudy with rain today (0.50 in. of rain possible), cloudy with evening rain and snow showers likely (6%), a good (50%) chance of scattered rain and snow showers and colder late tonight (0.10 in. of rain possible), mostly cloudy with a (30%) chance of rain and snow showers Thursday AM, a slight (20%) chance of rain and snow showers in the afternoon, just partly cloudy Thursday night, a mix of clouds and sun Friday, then becoming mostly cloudy with rain and snow likely (70%) Friday night snow level above 8,000 ft. falling to 7,500 ft. this afternoon, 6,000 ft. falling to 4,500 ft. tonight, 3,500 ft. Thursday, free air freezing level 6,500 ft. rising to 7,500 ft. Thursday night, 8,000 ft. rising to 9,000 ft. Friday, then snow level 5,500 ft. Friday night highs 48-40 warming to 46 Friday lows near 29. Mostly cloudy with rain and snow showers likely (60%) Saturday, a good (50%) chance of rain and snow showers at night, snow showers likely (70%) Sunday, a good (50%) chance of snow showers Sunday night and Monday, then mostly cloudy with a (40%) chance of rain and snow showers Monday night, then mostly cloudy with a good (50%) chance of rain and snow showers Tuesday snow level 4,000 ft. Saturday, 3,000 ft. Saturday night and Sunday, at the surface Sunday night, 3,000 ft. Monday and Monday night, then 4,000 ft. Tuesday highs 36-32 warming to near 42 Tuesday lows 22-25.
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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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