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Here again is my new weekly weather quiz question. One of the most important discoveries in modern Meteorology occurred during World War II. In 1944 our bombers taking part in the first raid on Japan had many of the planes run out of fuel much sooner than expected and many of them had to ditch in the ocean. What caused them to use up so much more fuel and later became one of the major tools in weather forecasting? Please post your answer as a comment after the forecasts on this page. 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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The upper air flow (yellow jet stream and dark colors for winds) shows a small high pressure ridge (“arch” shape in the yellow line) will give us a short period of drier weather f or Thursday. A trough of low pressure (“U” shape offshore) will quickly move behind the ridge pushing lots of moisture our way to set us up for some more wet weather. More frontal systems (position shown Friday) will be hitting Oregon the end of the week into the weekend with a cooler air mass expected. This is news for the ski resorts because the milder and rainy weather we have been having will be replaced with colder temperatures, falling snow levels, and new serious mountain snow accumulations.
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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: Mostly cloudy with a (30%) chance of showers tonight (under 0.10 in. of rain possible) then patchy fog late, AM clouds and patchy fog, a mix of clouds and sun Thursday afternoon, partly cloudy in the evening, a slight (20%) chance of rain Thursday night, mostly cloudy with a good (50%) chance of rain Friday, rain Friday night through Saturday night lows 31-38 highs hovering from 45-48. Mostly cloudy with rain likely (60%) Sunday through Tuesday night, and showers likely (60%) Wednesday highs 44-48 lows near 38. (seasonal averages highs 45 low 33)
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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with a slight (20%) chance of showers this evening, areas of fog late tonight and Thursday AM with a slight (20%) chance of showers, then mostly cloudy Thursday afternoon, a slight (20%) chance of rain Thursday night (snow level 3,000 ft. falling to 2,500 ft. late at night), a slight (20%) chance of AM rain Friday, rain Friday night (snow level 3,000 ft. rising to 3,500 ft.), rain Saturday and Saturday night lows 35-47 highs near 48. Mostly cloudy with rain Sunday, rain and snow likely (60%) Sunday night, rain Monday through Tuesday night, then showers likely (60%) Wednesday highs near 46 lows 37-40. (seasonal averages high 49 low 35)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with a (30%) chance of showers at the shore tonight and a slight (20%) chance of showers inland this evening, areas of patchy fog late tonight and Thursday AM, mostly cloudy with a slight (20%) chance of showers Thursday afternoon, a (40%) chance of rain Thursday night, cloudy with a (50%) chance rain Friday AM, afternoon coastal rain and inland afternoon rain likely (60%), rain Friday night, then rain and breezy Saturday and Saturday night lows near 42 highs 47-53. Mostly cloudy with rain and breezy Sunday, rain likely (60%-70%) Sunday night, rain Monday through Tuesday night, then showers likely (60%) Wednesday highs 45-48 lows 40-43. (seasonal averages high 53 lows 39).
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Forecast for the Cascades of Lane County: Mostly cloudy with a (30%) chance of snow showers tonight, a mix of clouds and sun Thursday, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of snow, mainly to the North, Thursday night, mostly cloudy with a slight (20%) chance of snow Friday AM, a good (50%) chance of rain and snow in the afternoon, then snow Friday night (2-5 in. of snow possible) through Saturday night snow level 3,500 ft. rising to 4,000 ft. Thursday afternoon, 4,500 ft. falling to 3,500 ft. late Thursday night into Friday afternoon, and 2,500 ft. Saturday lows 22-27 highs holding near 32. Mostly cloudy with snow likely (60%) Sunday through Tuesday night, and snow showers likely Wednesday snow level at the surface except 3,000 ft. Sunday and Monday night highs 30-33 lows between 28-24.
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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.