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Sorry, but no winner again this week.
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Here is my weekly weather quiz question for the last time. What is the difference between a warm front and a cold front? Here is the answer. A warm front is defined as the transition zone where a warm air mass is replacing a cold air mass. Warm fronts generally move from southwest to northeast and the air behind a warm front is warmer and more moist than the air ahead of it. When a warm front passes through, the air becomes noticeably warmer and more humid than it was before. A cold front is defined as the transition zone where a cold air mass is replacing a warmer air mass. Cold fronts generally move from northwest to southeast. The air behind a cold front is noticeably colder and drier than the air ahead of it. When a cold front passes through, temperatures can drop more than 15 degrees within the first hour. I’ll have a new weekly weather quiz question for you next monday. 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.
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Advisories: A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL MIDNIGHT TONIGHT ABOVE 2,000 FT. FOR THE COAST RANGE OF NORTHWEST OREGON. A WINTER WEATHER ADVISORY IS IN EFFECT ABOVE 2,000 FT. UNTIL MIDNIGHT TONIGHT FOR THE NORTH OREGON CASCADE FOOTHILLS. A WINTER WEATHER ADVISORY IS IN EFFECT FOR THE NORTH OREGON CASCADES, NOT INCLUDING THE CASCADES OF LANE COUNTY. A HIGH SURF WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE NORTH OREGON COAST AND A HIGH SURF ADVISORY IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE CENTRAL OREGON COAST. A HIGH SURF ADVISORY IS IN EFFECT UNTIL 9 AM SUNDAY FOR THE SOUTH CENTRAL AND SOUTH OREGON COAST.
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A high pressure ridge (“Arch” shape on yellow line) pulled away from us and a trough of low pressure (“U” shape on the yellow line) has taken over returning the wet weather pattern. A frontal system moved through scattering light rain and drizzle over the Pacific Northwest. There will be even more frontal systems (position shown is Tuesday) that will keep the showers around into next week.
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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: Cloudy with showers with possible hail this AM, showers with a slight (20%) chance of thunderstorms and possible small hail this afternoon (0.25 in. of rain possible, more in storms), showers tonight (0.15 in. of rain possible), mostly cloudy with a good (50%) chance of showers Sunday AM, a mix of clouds and sun in the afternoon (under 0.10 in. of rain possible), mostly cloudy with a good (50%) chance of rain Sunday night, rain likely (60%) Monday (Presidents’ Day), then cloudy with a good (50%) chance of rain Monday night highs 46-50 lows 32-38. Cloudy with a good (50%) chance of rain Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night and Wednesday, a (40%) chance of showers Wednesday night and Thursday, a slight (20%) chance of rain Thursday night, then mostly cloudy with a (30%) chance of rain Friday highs 52-55 cooling to near 50 Friday lows 42-37. (seasonal averages high 52 low 35)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with rain and snow showers with a slight (20%) chance of thunderstorms with possible small hail today (snow level 2,000 ft., 1 in. of snow possible, 0.15 in. of rain possible), rain and snow showers likely (60%) this evening, a good (50%) chance of rain and snow showers late at night (snow level 2,000 ft. falling to 1,500 ft. late, 0.10 in. of rain possible), mostly cloudy with a (30%) chance of showers Sunday AM, mostly cloudy Sunday afternoon, a good (50%) chance of rain Sunday night (snow level 3,500 ft.), mostly cloudy with rain Monday (Presidents’ Day), rain in the evening, then a (40%) chance of showers Monday night highs 49-45 warming to 54 Monday lows 35-43. Mostly cloudy with a (40%) chance of showers Tuesday, a slight (20%) chance of showers Tuesday night and Wednesday, a (30%) chance of showers Wednesday night and Thursday, then mostly cloudy with a slight (20%) chance of showers Thursday night and Friday highs 59-54 lows 44-36. (seasonal averages high 54 low 37)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with coastal showers and a slight (20%) chance of thunderstorms today and AM showers with a slight (20%) chance of thunderstorms inland then showers and snow showers with a slight (20%) chance of thunderstorms in the afternoon (snow level 2,000 ft., 0.25 in. of rain possible, small hail possible), scattered coastal showers tonight and scattered evening showers inland then a (40%) chance of rain and snow showers inland late tonight (0.10 in. of rain possible), mostly cloudy with a (30%) chance of coastal showers Sunday AM, mostly cloudy in the afternoon, a (40%) chance of evening coastal rain with rain likely (60%) late Sunday night and a (40%) chance of inland rain Sunday night, rain Monday (Presidents’ Day), then mostly cloudy with a good (50%) chance of showers Monday night highs 48-54 lows 38-45. Mostly cloudy with a good (50%) chance of showers Tuesday, a (40%) chance of showers Tuesday night, a (30%) chance of showers Wednesday, a (40%) chance of showers Wednesday night and Thursday, then mostly cloudy with a slight (20%) chance of showers Thursday night and Friday highs 53-50 lows 45-40. (seasonal averages high 53 low 40).
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Forecast for the Cascades of Lane County: Mostly cloudy with snow showers and colder today (2-5 in. of snow possible), snow showers (1-4 in. of snow possible) tonight, a good (50%) chance of snow showers Sunday AM, a mix of clouds and sun with a slight (20%) chance of snow showers in the afternoon, a good (50%) chance of rain and snow in the evening, rain and snow likely late Sunday night, rain and snow Monday (Presidents’ Day), then a good (50%) chance of rain and snow Monday night snow level at the surface today through Sunday, 2,500 ft. Sunday night, 3,500 ft. Monday, then 4,500 ft. Monday night highs 28-36 lows 18-26. Mostly cloudy with a good (50%) chance of rain Tuesday, a (30%) chance of rain Tuesday night, a slight (20%) chance of rain Wednesday, a (30%) chance of showers Wednesday night, mostly cloudy with a (40%) chance of rain and snow showers Thursday, a (40%) chance of rain Thursday night, then mostly cloudy with a slight (20%) of rain and snow Friday snow level 6,000 ft. Tuesday, 6,500 ft. Tuesday night and Wednesday, 5,500 ft. Wednesday night and Thursday, 6,000 ft. Thursday night, then 5,000 ft. Friday highs near 40 lows 30-27.
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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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