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Here is my weekly weather quiz question. How do scientists forecast volcanic eruptions? 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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Short-lived high pressure (shaded “Arch” shaped area offshore) brought out the sunshine Sunday warming us up more than I expected, Monday was pretty nice too but cooler, and should hold off more wet weather until tonight. A cold front moved into Oregon bringing the temperatures down and the next one (connected to it) is right behind and moves in as we speak. A trough of low pressure (Shaded “U” shaped area with blue arrows in the Gulf of Alaska) will move in behind the ridge sending waves of moisture at us. A frontal system (position shown is Thursday) will push into Oregon Wednesday with more behind it bringing increasing waves 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: Cloudy with patchy fog this AM, a mix of clouds and sun this afternoon, mostly cloudy with a (30%) chance of rain in the evening, a good (50%) chance of showers late tonight (under 0.10 in. of rain possible), mostly cloudy with a (30%) chance of showers Wednesday (under 0.10 in. of rain possible) and Wednesday night (under 0.10 in. of rain possible) a good (50%) chance of showers Thursday AM, then showers likely (60%) afternoon (0.20 in. of rain possible) and Thursday night highs 63-50 lows 45-36 warming to near 40 Thursday night. Mostly 0.20 in. of rain possible) cloudy with a good (50%) chance of showers Friday, a slight (20%) chance of showers Friday night, a mix of clouds and sun with a slight (20%) chance of showers Saturday, partly cloudy Saturday night, rain likely (60%) Sunday (Veterans Day), rain likely (60%) Sunday night and Monday (Federal Holiday) highs 48-52 lows 37-42. (seasonal averages high 55 low 39)
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Forecast for the Umpqua Basin including Roseburg: Sunny after patchy fog this AM, sunny this afternoon, becoming mostly cloudy with a slight (20%) chance of rain in the evening, a (30%) chance of showers tonight, a (30%), showers and cooler Wednesday, mostly cloudy and colder with a good (50%) chance of showers in the evening, rain (under 0.10 in. of rain possible) and colder with a slight (20%) chance of thunderstorms Wednesday night, showers with a slight (20%) chance of thunderstorms in the AM, rain and snow showers Thursday (, 0.25 in. of rain possible, snow level 2,500 ft.), rain and snow showers in the evening, then rain and snow showers late Thursday night highs 66-46 lows 47-36. Cloudy with a good (50%) chance of rain and snow showers Friday, mostly cloudy with a slight (20%) chance of rain and snow showers Friday night and Saturday, just mostly cloudy Saturday night, mostly cloudy with a (40%) chance of rain and snow Sunday (Veterans Day), rain likely (60%) Sunday night, then mostly cloudy with a good (50%) chance of showers Monday (Federal Holiday) highs 49-55 cooling to 52 Monday lows 36-40. (seasonal averages high 57 low 42)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with patchy fog this AM, mostly cloudy this afternoon at the shore while AM clouds then sunny in the afternoon inland, mostly cloudy with a slight (20%) chance of rain in the evening, mostly cloudy with a (40%) chance of showers late tonight, mostly cloudy with a (40%) chance of showers Wednesday (0.15 in. of rain possible), cloudy with a good (50%) chance of evening showers, rain Wednesday night (0.15 in. of rain possible) with a slight (20%) chance of coastal thunderstorms, rain with a slight (20%) chance of isolated thunderstorms Thursday (0.25 in. of rain possible), then showers Thursday night highs 65-47 lows 50-42 warming to 45 Thursday night. Mostly cloudy with showers likely (70%) Friday, a (30%) chance of showers Friday night, partly cloudy with a slight (20%) chance of showers Saturday, just mostly cloudy Saturday night, mostly cloudy with a good (50%) chance of rain Sunday (Veterans Day), rain likely (70%) Sunday night, then mostly cloudy with showers likely (60%) Monday (Federal Holiday) highs 50-55 lows 43-40. (seasonal averages high 57 low 44)
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Forecast for the Cascades of Lane County: Mostly sunny today, mostly cloudy with a (40%) chance of rain this evening, a (40%) chance of showers and colder late at night (0.10 in. of rain possible), a (40%) chance of AM showers, a (30%) chance of rain and snow showers and cooler Wednesday afternoon, mostly cloudy with a good (50%) chance of rain and snow showers Wednesday night, rain and snow showers likely (60%) Thursday, then rain and snow showers Thursday night free air freezing level 13,000 ft. falling to 12,000 ft. this afternoon, snow level above 8,000 ft. tonight, 6,500 ft. falling to 5,000 ft. Wednesday afternoon, 4,500 ft. Wednesday night, then 3,000 ft. Thursday and Thursday night highs 63-30 lows 34-24. Mostly cloudy with a good (50%) chance of snow showers Friday, a (40%) chance of snow showers at night, a mix of clouds and sun with a slight (20%) chance of snow showers Saturday, just mostly cloudy Saturday night, mostly cloudy with a good (50%) chance of snow Sunday (Veterans Day), rain and snow likely (60%) at night, then rain and snow likely (60%) Monday (Federal Holiday) snow level at the surface Friday through Saturday free air freezing level at the surface Saturday night, snow level at the surface Sunday, 4,000 ft. Sunday night, then 5,000 ft. Monday highs 30-37 lows 23-28.
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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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