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Here is my new weekly weather quiz question for this week. The Willamette Valley can see some pretty hot temperatures during the summer months, but the diurnal variation of temperatures is what makes it not as uncomfortable as it can get elsewhere. Explain what “diurnal” means and why does it make us more comfortable? 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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Advisories: A WINTER STORM WARNING IS IN EFFECT UNTIL 3 AM TODAY FOR THE NORTH AND CENTRAL OREGON COAST AND UNTIL 11 AM FORTHE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF OREGON. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM TODAY FOR THE NORTH OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY. A WINTER STORM WARNING IS IN EFFECT UNTIL 1 PM THIS AFTERNOON ABOVE 2,000 FT. FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND THE EASTERN DOUGLAS COUNTY FOOTHILLS. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM TODAY FOR THE NORTH OREGON CASCADES AND THE CASCADES IN LANE COUNTY. A HIGH WIND WARNING IS IN EFFECT UNTIL 2 AM TODAY FOR THE SOUTH CENTRAL AND SOUTH OREGON COAST. A HIGH SURF WARNING IS IN EFFECT UNTIL 11 AM TODAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY. A WIND ADVISORY IS IN EFFECT UNTIL 2 AM TODAY FOR JACKSON COUNTY AND UNTIL 8 AM TODAY FOR THE KLAMATH BASIN. A WINTER STORM WARNING IS IN EFFECT UNTIL 1 PM TODAY ABOVE 2,000 FT. CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 PM TODAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL AND SOUTH OREGON CASCADES, AND THE SISKIYOUS MOUNTAINS, THE KLAMATH BASIN. A HIGH WIND WARNING IS IN EFFECT UNTIL 11 AM TODAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY. A WIND ADVISORY IS IN EFFECT UNTIL 2 AM TODAY FOR JACKSON COUNTY AND UNTIL 8 AM TODAY FOR THE KLAMATH BASIN.
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A high pressure ridge (“Arch” shape on the yellow line) has moved eastward away from Oregon as the next trough of low pressure trough (“U” shape on the jet stream) approaches returning the clouds. A frontal system is pushing through Oregon continuing the wet weather and bringing some swift winds. Yet another frontal system (position shown for Wednesday) with others following behind it will continue the threat of rain 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: Mostly cloudy with AM rain and snow showers, showers likely (60%) this afternoon (snow level 1,000 ft., 1 in. of snow possible above 500 ft., 0.25 in. of rain possible), cloudy with a good (50%) chance of showers tonight (under 0.10 in. of rain possible), rain likely (60%) Wednesday (0.10 in. of rain possible), rain Wednesday night (0.15 in. of rain possible), rain Thursday, then rain likely (60%) Thursday night highs 45-55 lows 34-42. Mostly cloudy with showers likely (60%) Friday through Sunday night, then a good (50%) chance of showers (snow level 1,000 ft.) Monday highs near 49 lows 36-33. (seasonal averages high 56 low 37)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with AM rain and snow showers today, rain and snow showers likely (60%) this afternoon (snow level 900 ft., 1-2 in. of snow above 1,500 ft and 1 in. of snow possible at lower elevations, 0.10 in. of rain possible), a (40%) chance of rain and snow showers tonight (snow level 2,000 ft, under 0.10 in. of rain possible), partly cloudy with a (40%) chance of rain and snow Wednesday AM, rain likely (60%) in the afternoon (snow level 2,000 ft. rising to 3,000 ft. in the afternoon), mostly cloudy with rain Wednesday night through Thursday night highs 48-54 lows 38-43 cooling to near 40 Thursday night. Mostly cloudy with rain Thursday and Thursday night, showers Friday, rain and snow showers Friday night, rain and snow showers likely (60%) Saturday through Sunday, then mostly cloudy with a good (50%) chance of rain and snow showers Sunday night, then a (40%) chance of rain and snow showers Monday highs 53-46 lows 38-32. (seasonal averages high 58 low 39)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with coastal showers this AM with showers likely (60%) this afternoon (0.20 in. of rain possible), AM rain and snow showers inland, rain and snow showers likely (60%) in the afternoon inland (snow level 900 ft., in the afternoon, 1 in. of snow possible, under 0.10 in. of rain possible), a good (50%) chance of evening coastal showers with showers likely (60%) tonight and a (40%) chance of inland showers (snow level 2,000 ft., under 0.10 in. of rain possible), coastal showers likely (60%) Wednesday AM with rain in the afternoon, a good (50%) chance of inland morning rain with rain likely (60%) in the afternoon (0.10 in. of rain possible), rain Wednesday night, then mostly cloudy with rain and breezy Thursday and Thursday night highs 47-53 lows 39-45 cooling to 42 Thursday night. Mostly cloudy with showers Friday and Friday night, showers likely (60%) Saturday through Sunday night, then mostly cloudy with a good (50%) chance of rain and snow showers Monday highs 50-45 lows 40-34. (seasonal averages high 54 low 41).
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Forecast for the Cascades of Lane County: Mostly cloudy with snow showers (4-9 in. of snow possible) today, cloudy with a good (50%) chance of snow showers tonight, rain and snow likely (60%) Wednesday (1 in. of snow possible), rain or snow Wednesday night, AM rain Thursday, rain or snow and breezy in the afternoon, then rain or snow Thursday night snow level at the surface today, 2,5,00 ft. tonight, 3,500 ft. Wednesday, 5,000 ft. Wednesday night, 6,500 ft. Thursday, then 5,500 ft Thursday night highs 24-20 lows 22-28. Mostly cloudy with showers Friday, snow showers likely (60%) Friday night through Sunday night, then mostly cloudy with a good (50%) chance of snow showers Monday snow level 3,500 ft. Friday, 2,500 ft. Friday night, then at the surface Saturday through Monday highs 34-30 lows 27-20.
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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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