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Here again is my new weekly weather quiz question. One of the most important discoveries in modern Meteorology occurred during World War II. In 1944 our bombers taking part in the first raid on Japan had many of the planes run out of fuel much sooner than expected and many of them had to ditch in the ocean. What caused them to use up so much more fuel and later became one of the major tools in weather forecasting? Please post your answer as a comment after the forecasts on this page. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. Good luck.
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The upper air flow is pushing lots of moisture our way to set us up for some more potentially heavy rain. A cold front has been moving through the Pacific Northwest increasing the rain again as the warm front did on Saturday. There is another one approaching from the west. More frontal systems (shown Thursday) will be hitting Oregon continuing this week with a much cooler air mass expected. This would be good news for the ski resorts because the milder and rainy weather we have been having will be replaced with colder temperatures, falling snow levels, and new serious mountain snow accumulations.
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Advisories: A WINTER STORM WARNING IS IN EFFECT THROUGH MIDNIGHT TONIGHT FOR THE NORTH OREGON CASCADES AND THE CASCADES OF LANE COUNTY. A WINTER STORM WARNING IS IN EFFECT THROUGH 4 PM TODAY ABOVE 4,000 FT. FOR THE SOUTH CENTRAL AND SOUTH OREGON CASCADES AND THE SISKIYOU MOUNTAINS. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL MIDNIGHT TONIGHT ABOVE 1,500 FT. FOR THE NORTHERN AND CENTRAL COAST RANGE OF OREGON. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL MIDNIGHT TONIGHT ABOVE 1,500 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE FOOTHILLS IN LANE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM TODAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY. A HIGH WIND WARNING IS IN EFFECT UNTIL 4 PM TODAY FOR CENTRAL AND EASTERN LAKE COUNTY. A WIND ADVISORY IS IN EFFECT UNTIL 4 PM TODAY FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY.
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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 then showers and cooler this afternoon (0.50 in. of rain possible), showers likely (60%) tonight (0.10 in. of rain possible) and Wednesday (0.10 in. of rain possible), then mostly cloudy with a good (50%) chance of showers Wednesday night (0.10 in. of snow possible) highs 46-42 lows 38-33. Mostly cloudy with a good (50%) chance of showers Thursday, rain likely (60%) Thursday night, and then rain likely (60%-70%) Friday through Monday highs 45 lows 33-38. (seasonal averages highs 46 low 33)
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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with AM rain and isolated thunderstorms, then rain and snow showers this afternoon (snow level 3,000 ft. falling to 2,500 ft. in the afternoon), evening rain and snow showers, then rain and snow showers likely (60%) late tonight (snow level 2,500 ft. with 1 in. of snow possible), cloudy with a good (50%) chance of rain and snow showers Wednesday, a (30%) chance of rain and snow showers Wednesday night (snow level 2,500 ft. falling to 2,000 ft. late at night) and Thursday AM, a (40%) chance of afternoon showers (snow level 2,500 ft. rising to 3,500 ft.), then cloudy with rain and snow in the evening, and rain and snow likely (60%) Thursday night lows 38-34 highs 50-42. Mostly cloudy with rain and snow likely (60%) Friday, rain Friday night and Saturday, rain and snow Saturday night, then rain and snow likely (60%) Sunday through Monday highs between 44 and 47 lows near 38. (seasonal averages high 49 low 35)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with showers and isolated thunderstorms this AM and in the afternoon and breezy (winds: SW 15-25 mph), evening showers and possible thunderstorms, coastal showers likely (60%) late at night, a good (50%) chance of showers inland late, showers likely (60%) Wednesday, a good (50%) chance of showers Wednesday night and Thursday, and rain likely (60%) Thursday night highs 50-46 lows hovering between 45 and 49. Mostly cloudy with rain Friday through Monday highs 45-50 lows near 40. (seasonal averages high 53 lows 39).
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Forecast for the Cascades of Lane County: Mostly cloudy with rain and snow showers and breezy (SW 15-25 mph gusts to 40 mph) today (9-16 in. of snow possible), snow showers tonight (4-8 in. of snow possible), mostly cloudy with snow showers likely (60%) Wednesday (2-6 in. of snow possible), a good (50%) chance of snow showers Wednesday night and Thursday, and snow likely (60%) Thursday night snow level 3,000 ft. falling to 2,500 ft. this afternoon, 3,000 ft. Thursday night highs 35-27 lows 25-20. Mostly cloudy with a good (50%) chance of snow Thursday, snow likely (60%) Friday, snow Friday night, rain or snow Saturday, snow Saturday night, then snow likely (60%) Sunday through Monday snow level at the surface except 3,000 ft. Saturday highs 28-32 lows between 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.