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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 pushed 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 UNTIL 4 AM FRIDAY FOR THE SOUTH CENTRAL OREGON CASCADES. A WINTER WEATHER ADVISORY IS IN EFFECT 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 a good (50%) chance of scattered showers tonight with patchy fog late (0.10 in. of rain possible), patchy AM fog, a good (50%) chance of showers with a slight (20%) chance of thunderstorms in the afternoon (under 0.10 in. of rain possible, more in thunderstorms), mostly cloudy with a (30%) chance of isolated showers in the evening, partly cloudy with a slight (20%) chance of isolated showers Friday night (under 0.10 in. of rain possible), patchy fog with a mix of clouds and sun with a slight (20%) chance of showers Saturday AM, partly cloudy late in the afternoon and Saturday night, mostly cloudy Sunday (Veterans Day), then rain likely (70%) Sunday night lows 36-32 warming to 37 Sunday night highs 48-53. Mostly cloudy with rain Monday (Federal Holiday), mostly cloudy with rain likely (60%) Monday night, mostly cloudy with showers likely (60%) Tuesday, a (40%) chance of showers Tuesday night, a mix of clouds and sun with a (30%) chance of showers Wednesday, then partly cloudy with slight (20%) chance of showers Wednesday night and Thursday highs 52-49 lows 40-35. (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 tonight (snow level 2,500 ft. falling to 2,000 ft., 0.15 in. of rain possible, 1 in. of snow possible), a good (50%) chance of rain and snow showers and isolated thunderstorms in the AM, rain and snow showers likely (70%) with a slight (20%) chance of isolated thunderstorms Friday afternoon (snow level 2,000 ft. rising to 2,500 ft.), a (40%) chance of rain and snow showers Friday night (snow level 2,500 ft. falling to 2,000 ft. late), mostly cloudy Saturday, partly cloudy Saturday night, mostly cloudy Sunday (Veterans Day), then rain likely (60%) Sunday night lows 38-32 warming to 40 Sunday night highs near 48. Mostly cloudy with rain Monday (Federal Holiday), rain likely (70%) Monday night, showers likely (70%) Tuesday, mostly cloudy with a good (50%) chance of showers Tuesday night and Wednesday, then partly cloudy with a slight (20%) chance of showers Wednesday night and Thursday highs 54-50 lows 44-40. (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 tonight (0.15 in. of rain possible), mostly cloudy with showers likely (60%) and a slight (20%) chance of isolated coastal thunderstorms Friday AM, showers with a slight (20%) chance of isolated thunderstorms in the afternoon while showers likely (60%) with a slight (20%) chance of isolated thunderstorms inland (under 0.10 in. of rain possible), mostly cloudy with a (40%) chance of showers Friday night (under 0.10 in. of rain possible), just mostly cloudy Saturday, partly cloudy Saturday night (under 0.10 in. of rain possible), cloudy Sunday (Veterans Day), then mostly cloudy with rain likely (70%) Sunday night lows 39-46 highs 48-53. Mostly cloudy with rain Monday (Federal Holiday) and Monday night, showers likely (60%) Tuesday, a good (50%) chance of showers Tuesday night and Wednesday, then partly cloudy with a slight (20%) chance of showers Wednesday night and Thursday highs 56-52 lows 46-43. (seasonal averages high 57 low 44)
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Forecast for the Cascades of Lane County: Mostly cloudy with rain or snow showers this evening, snow showers likely (60%) late tonight (0.10 in. of rain possible, 1-3 in. of snow possible), snow showers likely (60%) Friday (1 in. of snow possible), mostly cloudy with a (40%) chance of scattered snow showers Friday night, a mix of clouds and sun with a slight (20%) chance of snow showers Saturday, just partly cloudy Saturday night snow level at the surface tonight through Saturday, then free air freezing level at the surface Saturday night, a mix of clouds and sun Sunday (Veterans Day), then rain and snow likely (60%) Sunday night lows 20-25 highs 29-37. Mostly cloudy with rain and snow Monday (Federal Holiday), rain and snow likely (60%) Monday night, rain and snow showers likely (60%) Tuesday, a good (50%) chance of rain and snow showers Tuesday night, a (40%) chance of rain and snow showers Wednesday, partly cloudy with a slight (20%) chance of rain and snow showers Wednesday night, then a mix of clouds and sun with a slight (20%) chance of rain and snow showers Thursday free air freezing level at the surface Sunday, snow level 3,000 ft. Sunday night, 4,500 ft. Monday and Monday night, 4,000 ft. Tuesday and Tuesday night, 4,500 ft. Wednesday, 5,000 ft. Wednesday night, then 4,500 ft. Thursday highs 37-42 lows 25-28.
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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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Get your local Eugene-Springfield news on-line at Eugene Daily News.com
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