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Here is my weekly weather quiz question. On Groundhog Day a famous groundhog in Pennsylvania predicts the length of the rest of the winter. The Europeans brought this tradition with them when they came to “The Americas.” What was the animal they used in their native land that they didn’t find here? Please post your answer as a comment after the forecasts. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. Good luck.
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A trough of low pressure (See “U” shape offshore) has been keeping us in a cool moist airflow for quite some time. It is moving across Oregon with a high pressure ridge behind it. The ridge will bring sunshine to usher in Autumn. The Autumnal Equinox occurs tomorrow, Wednesday, at 8:09 PM PDT beginning the Fall season and the full Harvest moon reveals itself early Thursday morning. Another upper level low will move down from along British Columbia sending surface wave into the Pacific Northwest. A frontal system will push through the state over the weekend enhancing the wet Autumn weather.
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Advisories: NONE AT THIS TIME.
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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: AM fog or low clouds, then a mix of clouds and sun today and Wednesday, partly cloudy with patchy fog late tonight, and mostly cloudy with patchy fog late Wednesday night and Thursday AM, a mix of clouds and sun in the AM then mostly cloudy with a slight (20%) chance of rain Thursday afternoon and evening, then partly cloudy late Thursday night highs 68-72 lows 46-48. A mix of clouds and sun and a bit warmer Friday and Saturday, partly cloudy Friday night and Saturday evening, then mostly cloudy with a slight (20%) chance of rain late Saturday night and Sunday AM, and a (40%) chance of showers Sunday through Monday AM, then a (40%) chance of rain in the afternoon highs 75-78 (74 Sunday) lows 52-54. (seasonal averages high 75 low 46)
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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with areas of fog this AM, then mostly cloudy this afternoon, partly cloudy with areas of fog late tonight and Wednesday AM, partly cloudy with a slight (20%) chance of rain late Wednesday night and Thursday AM, mostly cloudy in the afternoon, and partly cloudy Thursday night highs 67-73 lows 47-50. Partly cloudy and warmer Friday through Saturday, mostly cloudy with a (30%) chance of showers Saturday night, and mostly cloudy with a (30%-40%) chance of showers Sunday through Monday highs 80-77 warming to 83 Monday lows 52-55. (seasonal averages high 80 low 49)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: AM fog, then mostly cloudy this afternoon, mostly cloudy with areas of patchy fog tonight and Wednesday AM, then partly cloudy with a slight (20%) chance of rain late Wednesday night highs 63-65 lows 50-46. Mostly cloudy with a (30%) chance of rain Thursday AM, warmer in the afternoon with a slight (20%) chance of showers, mostly cloudy in the evening, then partly cloudy Thursday night highs 65 lows 49. Partly cloudy Friday through Saturday AM, mostly cloudy Saturday afternoon, a (40%) chance of showers Saturday night, then a (20%) chance of showers Sunday through Monday highs 64-70 lows 53-56. (seasonal averages high 67 lows 50).
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Forecast for the Cascades of Lane County: A mix of clouds and sun today, partly cloudy tonight, a mix of clouds and sun and warmer Wednesday, partly cloudy Wednesday night, mostly cloudy Thursday with a slight (20%) chance of rain in the afternoon to the North, a slight (20%) chance of rain late in the evening, and partly cloudy Thursday night, free air freezing level 11,000 ft. today, 10,000 ft. tonight, 9,000 ft. Wednesday, 11,000 ft. Wednesday night, snow level above 8,000 ft. Thursday and Thursday night highs 56-58 lows 40-37. A mix of clouds and sun Friday , mostly clear Friday night, mostly cloudy Saturday with a slight (20%) chance of afternoon rain, partly cloudy with a slight (20%) chance of showers evening showers, then mostly cloudy with a (30%) chance of rain late Saturday night and Sunday AM, then mostly cloudy with a (30%) chance of showers Sunday afternoon through Monday AM, then a (30%) chance of rain Monday afternoon free air freezing level 9,000 ft. Friday, 10,000 ft. Friday night, snow level above 8,000 ft. Saturday through Monday highs in the mid 60s lows 42-46.
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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.