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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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A high pressure (shaded “Arch” shaped area) is slowly moving away from us while a trough of low pressure (Shaded “U” shaped area with blue arrows off Vancouver Island) has moved in behind the ridge sending waves of moisture at us. A disturbance is pushing through Oregon today. A frontal system slid through Oregon Wednesday ushering in colder air that dropped our temperatures from well above normal to below normal. Another frontal system, in a series of them, will push into Oregon next Monday with increasing the rain chances again.
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Advisories: A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 1 PM TODAY UNTIL 4 AM FRIDAY FOR THE SOUTH CENTRAL OREGON CASCADES. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 1 PM TODAY UNTIL 10 AM FRIDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL, AND EASTERN LAKE COUNTY LAKE COUNTY.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy with patchy fog this AM, showers likely (60%) today (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of scattered showers tonight (under 0.10 in. of rain possible), a good (50%) chance of showers Friday with a slight (20%) chance of thunderstorms in the afternoon (under 0.10 in. of rain possible), mostly cloudy with a (30%) chance of scattered showers in the evening, partly cloudy with a slight (20%) chance of scattered showers Friday night, a mix of clouds and sun with a slight (20%) chance of showers Saturday AM, then partly cloudy in the afternoon and Saturday night highs 49-46 lows 36-33. Mostly cloudy Sunday (Veterans Day), rain likely (60%) Sunday night, rain Monday (Federal Holiday), mostly cloudy with showers likely (60%) Monday night, mostly cloudy with a good (50%) chance of showers Tuesday, a (40%) chance of showers Tuesday night, then mostly cloudy with a (30%) chance of showers Wednesday highs 48-52 lows 37-42 cooling to 38 Tuesday night. (seasonal averages high 55 low 39)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with rain and snow showers and a slight (20%) chance of isolated thunderstorms this afternoon and evening (snow level 2,500 ft, 1 in. of snow possible), rain and snow showers with a slight (20%) chance of isolated thunderstorms late tonight (snow level 2,000 ft., 0.15 in. of rain possible, 1 in. of snow possible), rain and snow showers likely (60%) with a slight (20%) chance of isolated thunderstorms Friday a (40%) chance of rain and snow showers Friday night (snow level 2,500 ft. falling to 2,000 ft. late), mostly cloudy Saturday AM, partly cloudy in the afternoon and Saturday night highs near 47 lows 38-30. Mostly cloudy Sunday (Veterans Day), rain likely (60%) Sunday night, rain Monday (Federal Holiday), showers likely (70%) Monday night and Tuesday, mostly cloudy with a good (50%) chance of showers Tuesday night, then partly cloudy with a (30%) chance of showers Wednesday highs 49-55 lows 41-46 cooling to near 40 Tuesday night. (seasonal averages high 56 low 41)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with showers and a slight (20%) chance of isolated thunderstorms today (0.30 in. of rain possible) and tonight (0.15 in. of rain possible), showers likely (60%) with a slight (20%) chance of isolated coastal thunderstorms Friday AM, showers with a slight (20%) chance of isolated thunderstorms in the afternoon while showers with a slight (20%) chance of isolated thunderstorms inland, mostly cloudy with a (40%) chance of showers Friday night, just mostly cloudy Saturday, then partly cloudy Saturday night highs near 50 lows near 39. Mostly cloudy Sunday (Veterans Day), rain likely (70%) Sunday night, mostly cloudy with rain Monday (Federal Holiday), showers Monday night, showers likely (60%) Tuesday, a good (50%) chance of showers Tuesday night, then mostly cloudy with a slight (20%) chance of showers Wednesday highs 53-56 lows 46-50 cooling to near 45 Tuesday night. (seasonal averages high 57 low 44)
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Forecast for the Cascades of Lane County: A mix of clouds and sun with a (40%) chance of rain and snow showers this AM, rain and snow showers this afternoon (0.10 in. of rain possible, 2 in. of snow possible), snow showers increasing tonight (0.10 in. of rain possible, 1-3 in. of snow possible), snow showers likely (60%) Friday, mostly cloudy with a (30%) chance of scattered snow showers Friday night, a mix of clouds and sun with a slight (20%) chance of snow showers Saturday, then just mostly cloudy Saturday evening and partly cloudy at night snow level 3,000 ft. today, at the surface tonight through Saturday, then free air freezing level at the surface Saturday night highs 35-30 warming to 33 Saturday lows near 20. Mostly cloudy Sunday (Veterans Day), rain and snow likely (60%) Sunday night, rain and snow Monday (Federal Holiday), rain and snow showers likely (60%) Monday night, a good (50%) chance of rain and snow showers Tuesday, a (40%) chance of rain and snow showers Tuesday night, then mostly cloudy with a (30%) chance of rain and snow showers Wednesday snow level at the surface Saturday, free air freezing level at the surface Saturday night and Sunday, 3,500 ft. Sunday night, 4,500 ft. Monday, 5,000 ft. Monday night, 4,500 ft. Tuesday, 4,000 ft. Tuesday night, then 4,500 ft. Wednesday highs 37-42 lows 27-24.
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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.
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Get your local Eugene-Springfield news on-line at Eugene Daily News.com
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