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No winner this week. Here is my weekly weather quiz question for the last time. What is an “Omega High?” Here is the correct answer. An “Omega High” is a warm high aloft which has become displaced and is on the polarward side of the jet stream. It frequently occurs in the late winter and early spring in the Northern Hemisphere. The name comes from its resemblance to the Greek letter, Omega, when analyzed on upper air charts. It is an example of a blocking high. It prevents storms rom moving in under the umbrella of the high. I’ll have a new weekly weather quiz question for you staring Monday. 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 high pressure ridge (Shaded “Arch” shape) kept the rain away has moved to the east. An upper level trough of low pressure (Shaded “U” shape) is bringing back the rainy weather as it replaces the ridge. What looks to be a strong frontal system will approach the Pacific Northwest late Monday and move through Tuesday continuing the chance of rain.
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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: Mostly cloudy with rain this evening, showers late tonight (0.10 in. of rain possible) and patchy fog, patchy AM fog Sunday, a mix of clouds and sun in the afternoon, partly cloudy with patchy fog late Sunday night and Monday AM, mostly sunny in the afternoon, becoming mostly cloudy with a slight (20%) chance of evening rain, a (30%) chance of rain late Monday night, mostly cloudy with rain Tuesday, then showers Tuesday night lows 38-34 warming to 38 Monday night cooling 35 Tuesday night highs 50-54 cooling to 48 Tuesday. Mostly cloudy with showers Wednesday, showers likely (60%) at night, a good (50%) chance of showers Thursday, a (30%) chance of showers Friday, partly cloudy Friday night, then partly cloudy with a slight (20%) chance of rain Saturday highs 48-55 lows near 37. (seasonal averages high 54 low 36)
Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with evening rain, showers likely (70%) late tonight (under 0.10 in. of rain possible, snow level 3,000 ft. late at night), mostly cloudy with a slight (20%) chance of AM rain and snow showers Sunday (snow level 2,000 ft.), partly cloudy in the afternoon, mostly clear with patchy fog late Sunday night and Monday AM, partly cloudy Monday afternoon, mostly cloudy with a (40%) chance of at night (under 0.10 in. of rain possible), rain Tuesday and in the evening, then showers late Tuesday night lows 40-32 warming to 39 Tuesday night highs 53-57 cooling to 53 Tuesday. Mostly cloudy with rain and snow showers Wednesday, rain and snow showers likely (70%) at night, a good (50%) chance of rain and snow showers Thursday, mostly cloudy with a (30%) chance of showers Thursday night, then partly cloudy Friday through Saturday highs 52-57 lows 38-35. (seasonal averages high 56 low 38)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with evening rain, showers likely (70%) late tonight (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of AM showers, partly cloudy in the afternoon, mostly clear in the evening, partly cloudy with patchy fog late Sunday night and Monday AM, partly cloudy Monday afternoon, mostly cloudy with evening coastal and rain likely (70%) late at night while a good (50%) chance of inland evening rain and rain likely (70%) late Monday night, rain Tuesday, then mostly cloudy with showers Tuesday night lows 38-33 warming to 42 Monday night and cooling to 38 Tuesday night highs 50-54 cooling to 48 Tuesday. Mostly cloudy with showers Wednesday, showers likely (70%) Wednesday night and Thursday, mostly cloudy with a good (50%) chance of showers Thursday night, partly cloudy with a slight (20%) chance of showers Friday, just partly cloudy at night, then mostly cloudy with a slight (20%) chance of rain Saturday highs 48-54 lows near 39. (seasonal averages high 54 low 41)
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Forecast for the Cascades of Lane County: Mostly cloudy with rain and snow this evening, rain and snow showers and colder late tonight (0.25 in. of rain possible, 2 in. of snow possible), a mix of clouds and sun with a slight (20%) chance of AM snow showers and colder Sunday afternoon, clear at night, mostly sunny and just a bit warmer Monday, mostly cloudy with a good (50%) chance of rain and snow late Monday night, rain and snow Tuesday, then rain and snow showers Tuesday night snow level 5,000 ft. falling to 3,000 ft. late tonight, free air freezing level at the surface Sunday, 4,000 ft. falling to the surface late Sunday night, 6,500 ft. falling to 5,000 ft. Monday afternoon, snow level 5,000 ft. Monday night, 4,000 ft. Tuesday, then 3,500 ft. Tuesday night lows 24-28 cooling to 24 Tuesday night highs 36-44 cooling to 35 Tuesday. Mostly cloudy with rain and snow showers Wednesday, rain and snow showers likely (60%) Wednesday night, a good (50%) chance of snow showers Thursday, a good (50%) chance of rain and snow showers Thursday night, a mix of clouds and sun with a slight (20%) chance of rain and snow showers Friday, just partly cloudy Friday night, then a mix of clouds and sun Saturday snow level 3,000 ft. Wednesday and Wednesday night, 2,500 ft. Thursday, 3,000 ft. Thursday night and Friday, free air freezing level 5,500 ft. Friday night, then 5,000 ft. Saturday highs 35-42 lows 22-26.
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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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