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Here is my new weekly weather quiz question. In times of active weather the “Mesonet” comes in handy. What is it? 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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An Upper Level Low Pressure Trough
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An upper level low pressure trough moving away.
An upper level low pressure trough (Shaded “U” shape) has pushed through the Pacific Northwest and is now centered over the Southwest and still moving. A frontal system (now in the Southwest) pushed southward through Oregon. The leading edge of a high pressure ridge (Shaded “Arch” shape) is sending colder air down from Canada which is driving snow levels down. Another frontal system will slide toward us Friday (position shown is Sunday ) increasing the rain chances. See the pattern here of frontal systems (this one shown on Tuesday) that will march through the Pacific Northwest.
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Advisories: A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF OREGON, THE NORTH OREGON CASCADE FOOTHILLS, AND THE CASCADE FOOTHILLS IN LANE COUNTY. A WINTER STORM WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH LATE FRIDAY NIGHT FOR THE NORTH OREGON CASCADES, AND THE CASCADES OF LANE COUNTY.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy with rain today (0.10 in. of rain possible) and tonight (0.10 in. of rain possible), rain (0.15 in. of rain possible) Friday (0.20 in. of rain possible) and breezy (wind: S 5-10 mph increasing to S 20-25 mph) and in the evening, showers late Friday night (0.35 in. of rain possible), mostly cloudy with rain and snow showers Saturday AM, showers in the afternoon (snow level 1,000 ft.), then a (40%) chance of rain Saturday night highs 47-49 cooling to 46 Saturday lows near 36. Mostly cloudy with a good (50%) chance of showers Sunday, rain likely (60%) Sunday night and Monday, a good (50%) chance of showers Monday night, cloudy with good (50%) chance of rain Tuesday, then mostly cloudy with a good (50%) chance of rain Tuesday night and Wednesday highs 48-44 warming to near 50 Wednesday lows near 36. (seasonal averages high 52 low 35)
Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with AM rain and snow likely (70%), rain and snow this afternoon (under 0.10 in. of rain possible, 1 in. of snow possible, snow level 2,000 ft. rising to 2,500 ft.), rain and snow likely (70%) in the evening, rain likely (70%) late tonight (under 0.10 in. of rain possible) and Friday AM (AM snow level 3,000 ft.), rain in the afternoon (0.10 in. of rain possible) and evening and breezy (wind: S 5-10 mph increasing to S 15-25 mph gusts to 40 mph late AM and afternoon), evening rain, rain and snow late Friday night (0.30 in. of rain possible, snow level 2,000 ft.), AM rain and snow, rain and snow showers Saturday afternoon (snow level 1,500 ft.), then mostly cloudy with a (40%) chance of rain and snow showers Saturday night lows 37-40 cooling to 33 Saturday night highs 50-46. Mostly cloudy with a (30%) chance of rain and snow showers Sunday AM, a (40%) chance of afternoon showers, rain likely (60%) Sunday night and Monday AM, rain and snow likely (60%) in the afternoon, a good (50%) chance of rain and snow showers Monday night, a (40%) chance of rain and snow showers Tuesday AM, then a good (50%) chance of rain and snow Tuesday afternoon through Wednesday highs 54-48 warming to 52 Tuesday and Wednesday lows near 37. (seasonal averages high 55 low 38)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain this AM, coastal rain this afternoon while inland showers likely (70%) this afternoon (0.10 in. of rain possible, AM snow level 2,000 ft.), coastal evening rain with rain likely (70%) late while showers likely (60%) inland tonight (0.10 in. of rain possible), rain Friday (0.30 in. of rain possible) and windy (wind: S 10-20 mph increasing to S 25-35 mph late morning and afternoon at the shore and SW 15-25 mph inland), rain Friday night (0.50 in. of rain possible, snow level 2,000 ft. late), AM coastal rain with afternoon showers Saturday while AM rain and snow inland and rain and snow showers in the afternoon, a good (50%) chance of evening rain or snow showers, then mostly cloudy with a good (50%) chance of showers Saturday night highs 47-50 cooling to 45 Saturday lows 39-42 cooling to 35 Saturday night. Mostly cloudy with a good (50%) chance of showers Sunday, rain likely (60%) Sunday night and Monday, a good (50%) chance of showers Monday night and Tuesday AM, then mostly cloudy with a good (50%) chance of rain Tuesday afternoon through Wednesday highs 50-46 warming to 52 Wednesday lows 38-42. (seasonal averages high 53 low 40)
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Forecast for the Cascades of Lane County: Mostly cloudy with snow today (0.25 in. of rain possible, 2 in. of snow possible), snow tonight (0.25 in. of rain possible, 1-3 in. of snow possible), AM snow, rain and snow Friday afternoon (0.75 in. of rain possible, 3-7 in. of snow possible), rain and snow (possibly heavy at times) in the evening, snow showers late Friday night and breezy (wind: W 15-25 mph gusts to 45 mph shifting to W 10-20 mph gusts to 35 mph late), snow showers Saturday, then mostly cloudy with a (40%) chance of snow showers Saturday night snow level 2,500 ft. today and tonight, 2,500 ft. rising to 4,500 ft. Friday afternoon, 4,000 ft. Friday evening, then at the surface late Friday night through Saturday night highs 32-36 cooling to 28 Saturday lows 24-18. Mostly cloudy with a good (50%) chance of snow Sunday, a good (50%) chance of rain and snow Sunday night, rain and snow likely (70%) Monday, a good (50%) chance of snow showers Monday night, a (40%) chance of snow Tuesday, rain and snow likely (60%) at night, then mostly cloudy with a good (50%) chance of rain and snow Wednesday snow level at the surface Sunday, 3,500 ft. Sunday night, 3,000 ft. Monday, at the surface Monday night and Tuesday, then 3,000 ft. Tuesday night and Wednesday highs 25-32 cooling to 25 Monday and warming back to 32 Tuesday lows 23-20 warming to 25 Tuesday night.
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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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