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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 HIGH WIND WARNING IS IN EFFECT UNTIL 7 PM THIS EVENING FOR THE NORTH AND CENTRAL OREGON COAST. A HIGH SURF ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE NORTH AND CENTRAL OREGON COAST. A WINTER STORM WARNING IS IN EFFECT UNTIL 3 AM TUESDAY FOR THE COAST RANGE OF NORTHWEST OREGON. A WIND ADVISORY IS IN EFFECT UNTIL 7 PM THIS EVENING FOR THE NORTH WILLAMETTE VALLEY, AND UNTIL 5 PM THIS AFTERNOON THE ENTIRE I-5 CORRIDOR FROM PORTLAND SOUTH THROUGH EUGENE AND SPRINGFIELD. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 6 PM TODAY THROUGH 6 PM TUESDAY FOR THE NORTH OREGON CASCADE FOOTHILLS, AND FROM 9 PM THIS EVENING UNTIL NOON TUESDAY FOR THE CASCADE FOOTHILLS IN LANE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM TUESDAY FOR THE NORTH OREGON CASCADES AND FROM 1 AM UNTIL NOON TUESDAY FOR THE CASCADES IN LANE COUNTY. A HIGH WIND WARNING IS IN EFFECT UNTIL 2 AM TUESDAY FOR THE SOUTH CENTRAL AND SOUTH OREGON COAST. A HIGH SURF WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE SOUTH CENTRAL AND SOUTH OREGON COAST AND UNTIL 11 AM TUESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY. A WIND ADVISORY IS IN EFFECT UNTIL 7 PM THIS EVENING FOR CENTRAL DOUGLAS COUNTY AND UNTIL 2 AM TUESDAY FOR JACKSON COUNTY AND UNTIL 8 AM TUESDAY FOR THE KLAMATH BASIN. A WINTER STORM WARNING IS IN EFFECT FROM 9 PM TONIGHT UNTIL 1 PM TUESDAY ABOVE 2,000 FT. CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 11 PM TONIGHT UNTIL 1 PM TUESDAY 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 TUESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY. A WIND ADVISORY IS IN EFFECT UNTIL 2 AM TUESDAY FOR JACKSON COUNTY AND UNTIL 8 AM TUESDAY 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 rain (0.25 in. of rain possible) and windy (wind: S 25-35 mph gusts to 50 mph) today, rain, heavy at times, (1.00 in. of rain possible) tonight, showers Tuesday (snow level 1,000 ft., 0.25 in. of rain possible), cloudy with a good (50%) chance of showers Tuesday night (under 0.10 in. of rain possible), rain likely (60%) Wednesday (under 0.10 in. of rain possible), then rain Wednesday night highs 50-45 warming to 53 Wednesday lows 35-42. Mostly cloudy with rain Thursday, rain likely (60%) Thursday night, then mostly cloudy with showers likely (60%) Friday through Sunday highs 51-46 warming to 52 Sunday lows 42-36. (seasonal averages high 56 low 37)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with AM rain and snow (snow level 2,000 ft. rising to 3,500 ft., under 0.10 in. of rain possible) likely (60%) today and windy (wind: S 20-30 mph gusts to 50 mph late AM and afternoon), evening rain, rain and snow (snow level 2,000 ft. late at night, 1 in. of snow possible, 0.65 in. of rain possible) late tonight and breezy (wind: S 15-25 mph gusts 40 mph, shifting SW 10-15 mph late tonight), AM rain and snow Tuesday (0.15 in. of rain possible), rain and snow likely (60%) in the afternoon (snow level 1,000 ft. rising to 1,500 ft., 1-2 in. of snow possible) rain and snow showers likely (60%) Tuesday night (snow level 2,000 ft, 0.10 in. of rain possible), then mostly cloudy with showers likely (60%) Wednesday AM, rain likely (60%) in the afternoon (snow level 3,500 ft.), then rain Wednesday night lows 36-40 cooling to 36 Wednesday night highs 52-48 warming to near 53 Wednesday. Mostly cloudy with rain Thursday and Thursday night, showers Friday, rain and snow showers Friday night, then rain and snow showers likely (60%) Saturday through Sunday highs 53-46 lows 42-35. (seasonal averages high 57 low 39)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain (early AM snow level 2,000 ft., 0.50 in. of rain possible) today and very windy (wind: S 35-50 mph at the shore and S 25-35 mph inland), rain (snow level 2,000 ft., 2.00 in. of rain possible), heavy at times, tonight and windy (wind S 20-30 mph gusts to 50 mph switching SW 10-20 mph late), coastal rain Tuesday AM, showers likely (60%) in the afternoon (0.20 in. of rain possible), AM rain and snow inland Tuesday, rain and snow showers likely (60%) in the afternoon inland (snow level 1,000 ft. rising to 1,500 ft. in the afternoon, 0.20 in. of rain possible), showers likely (60%), Tuesday night (snow level 2,000 ft., under 0.10 in. of rain possible), showers likely (60%) Wednesday AM, rain in the afternoon (0.10 in. of rain possible), then mostly cloudy with rain Wednesday night highs 50-47 warming to 53 Wednesday lows 39-45. Mostly cloudy with rain Thursday and Thursday night, showers Friday and Friday night, showers likely (60%) Saturday and Saturday night, then mostly cloudy with rain and snow showers likely (60%) Sunday highs 52-45 lows 42-35. (seasonal averages high 54 low 41).
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Forecast for the Cascades of Lane County: Mostly cloudy with snow likely (60%) this AM, rain and snow (1 in. of snow possible, 0.10 in. of rain possible) likely (60%) this afternoon and windy (wind: S 20-30 mph gusts to 65 mph), rain and snow (5-9 in. of snow possible) tonight and windy (wind: S 20-30 mph gusts to 60 mph decreasing to 45 mph late), mostly cloudy with snow showers (4-8 in. of snow possible) Tuesday, rain and snow showers likely (60%) Tuesday night, rain and snow likely (60%) Wednesday, then rain Wednesday night snow level 2,500 ft. rising to 4,000 ft. today, 3,000 ft. tonight, at the surface Tuesday, 3,000 ft. Tuesday night, 4,000 ft. Wednesday, then 5,500 ft. Wednesday night highs 37-30 warming to near 40 Wednesday lows 25-30. Mostly cloudy with rain and snow Thursday and breezy, rain Thursday night, rain and snow showers likely (60%) Friday, then snow showers likely (60%) Friday night through Sunday snow level 5,000 ft. Thursday, 6,000 ft. Thursday night, 4,000 ft. Friday, 2,500 ft. Friday night, at the surface Saturday, 2,500 ft. Saturday night then at the surface Sunday highs 39-32 lows 27-24.
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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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