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It’s Monday. Here is my weekly weather quiz question. What is “orographic lifting.” 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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Another upper level trough of low pressure has moved eastward over us. A new frontal system along with a new trough of low pressure will bring more wet weather for Christmas Day. Sorry, no white Christmas for the valleys only the mountains and foothills. Yet another weak frontal system will approach the Pacific Northwest Friday and try to produce more showers.
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Advisories: A WINTER WEATHER ADVISORY IS IN EFFECT FROM 2 AM UNTIL 10 AM TUESDAY FOR THE COAST RANGE OF NORTHWEST OREGON. A WINTER STORM WARNING IS IN EFFECT FROM 4 AM TUESDAY UNTIL 4 AM WEDNESDAY FOR THE NORTH OREGON CASCADES FOOTHILLS, NORTH OREGON CASCADES, THE CASCADES OF LANE COUNTY, THE UPPER HOOD RIVER VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE SOUTH CENTRAL AND SOUTH OREGON CASCADES, THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY. A HIGH WIND WARNING IS IN EFFECT FROM 4 AM UNTIL 1 PM TUESDAY FOR THE SOUTH CENTRAL AND SOUTH OREGON COAST. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 7AM UNTIL 10 PM TUESDAY FOR THE KLAMATH BASIN.
A FLOOD WARNING CONTINUES FOR THE COQUILLE RIVER AT COQUILLE. MINOR FLOODING IS OCCURRING AS WAS EXPECTED. FOR MORE DETAILS GO TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE AT PORTLAND FLOOD WARNING PAGE.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy with rain late tonight (0.25 in. of rain possible), rain (0.50 in. of rain possible) Tuesday (Christmas Day) and Tuesday night (0.50 in. of rain possible), mostly cloudy with showers Wednesday, showers likely (60%) Wednesday night, a mix of clouds and sun with a (30%) chance of showers Thursday, then mostly cloudy with a slight (20%) chance of showers Thursday night lows 37-40 cooling to 33 Thursday night highs 46-42. Mostly cloudy Friday and Friday night, a mix of clouds and sun Saturday and Sunday with mostly cloudy skies Saturday night, Sunday night and Monday highs 42-44 lows near 34. (seasonal averages high 45 low 33)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with rain and snow late tonight (under 0.10 in. of rain possible, 1-2 in. of snow possible, snow level 2,000 ft.), AM rain and snow (0.35 in. of rain possible, 1 in. of snow possible, AM snow level 2,500 ft.) Tuesday (Christmas Day), evening rain, showers late (0.20 in. of rain possible, snow level 2,000 ft. late) Tuesday night, rain and snow showers Wednesday (0.20 in. of rain possible, snow level 2,500 ft.), rain and snow showers in the evening (snow level 2,500 ft.), rain and snow showers likely (70%) Wednesday night (0.10 in. of rain possible, snow level 3,000 ft. falling to 2,000 ft. late), mostly cloudy with a (40%) chance of rain and snow showers Thursday, then just mostly cloudy Thursday night lows 37-39 cooling to 33 Thursday night highs near 46-43. Mostly cloudy Friday through Saturday, mostly cloudy with a slight (20%) chance of rain and snow showers Saturday night, then just mostly cloudy Sunday through Monday highs 43-46 lows near 32. (seasonal averages high 47 low 36)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with a slight (20%) chance of evening rain, rain (0.20 in. of rain possible) late tonight and windy (wind: S 10-20 mph increasing to SE 25-35 mph late at the shore and SE 10-20 mph inland), mostly cloudy with rain (0.70 in. of rain possible) Tuesday (Christmas Day) and windy (wind: S 25-40 mph decreasing to S 15-25 mph at the shore and S 15-25 mph inland in the afternoon), evening rain, showers (0.45 in. of rain possible) late Tuesday night, showers Wednesday (0.40 in. of rain possible) and in the evening, mostly cloudy with showers likely (70%) late Wednesday night (0.20 in. of rain possible), mostly cloudy with a (30%) chance of showers Thursday, then just mostly cloudy Thursday night lows 39-42 cooling to 36 Thursday night highs 50-47. Mostly cloudy with a slight (20%) chance of showers Friday through Saturday night, then mostly cloudy Sunday, and mostly cloudy with a slight (20%) chance of showers Sunday night and Monday highs 48-52 lows near 35. (seasonal averages high 51 low 40)
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Forecast for the Cascades of Lane County: Mostly cloudy with snow late tonight (0.10 in. of rain possible, 2 in. of snow possible), mostly cloudy with rain and snow (0.75 in. of rain possible, 6-10 in. of snow possible) Tuesday (Christmas Day), rain and snow Tuesday night (0.50 in. of rain possible, 2-5 in. of snow possible), mostly cloudy with rain and snow showers Wednesday (0.30 in. of rain possible), snow showers likely (70%) Wednesday night (0.15 in. of rain possible), a (30%) chance snow showers Thursday, then mostly cloudy with a slight (20%) chance of snow showers Thursday night snow level at the surface tonight, 2,500 ft. rising to 3,500 ft. Tuesday, 4,000 ft. Tuesday night, 3,000 ft. Wednesday, 2,500 ft. Wednesday night, then at the surface Thursday and Thursday night lows 24-27 cooling to near 20 Thursday night highs 33-28. Mostly cloudy with a slight (20%) chance of snow showers Friday, mostly cloudy Friday night, a mix of clouds and sun Saturday, mostly cloudy with a slight (20%) chance of snow showers Saturday night, a mix of clouds and sun Sunday, then mostly cloudy Sunday night and Monday snow level at the surface Friday night, free air freezing level at the surface Friday night and Saturday, back to snow level at the surface Saturday night, 3,500 ft. Sunday, 4,500 ft. Sunday night, then 4,000 ft. Monday highs near 32 lows near 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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