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Here 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 front is 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 FROM 8 PM THIS EVENING THROUGH MIDNIGHT TUESDAY NIGHT FOR THE NORTH OREGON CASCADES AND THE CASCADES OF LANE COUNTY. A WINTER STORM WARNING IS IN EFFECT FROM 10 PM TONIGHT THROUGH 4 PM TUESDAY ABOVE 4,000 FT. FOR THE SOUTH CENTRAL AND SOUTH OREGON CASCADES AND THE SISKIYOU MOUNTAINS. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM TUESDAY UNTIL MIDNIGHT TUESDAY NIGHT ABOVE 1,500 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE FOOTHILLS IN LANE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM TO 4 PM TUESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY. A HIGH WIND WARNING IS IN EFFECT FROM 1 AM TO 4 PM TUESDAY FOR CENTRAL AND EASTERN LAKE COUNTY. A WIND ADVISORY IS IN EFFECT FROM 1 AM UNTIL 4 PM TUESDAY 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 rain tonight (o.50 in. of rain possible), AM rain then showers and cooler Tuesday afternoon (0.50 in. of rain possible), showers likely (60%) Tuesday night (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) lows 43-32 highs 45-42. 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: Cloudy with rain tonight, AM showers Tuesday, then afternoon rain and snow showers and possible thunderstorms (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 Tuesday night (snow level 2,500 ft. falling to 2,000 ft. late at night with 1 in. of snow possible), mostly cloudy with rain and snow showers likely (60%) Wednesday AM, rain and snow showers in the afternoon (snow level 2,000 ft. rising to 2,500 ft.), and cloudy with a (40%) chance of rain and snow showers Wednesday night (snow level 2,500 ft. falling to 2,000 ft. late at night) lows 45-32 highs 50-40. Mostly cloudy with a good (50%) chance of rain and snow Thursday AM, a (40%) chance of afternoon showers, cloudy with a good (50%) chance of evening rain and snow, then rain and snow likely (60%) Thursday night lows 46-33 highs 50-40. 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 43 and 50 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 rain tonight and windy (wind: SW 20-30 mph), showers Tuesday AM, showers and isolated thunderstorms in the afternoon and breezy (winds: SW 15-25 mph gusts to 45 mph early AM), evening showers, showers likely (60%) late at night (snow level 2,000 ft. late), coastal showers Wednesday, AM showers likely inland (AM snow level 2,000 ft.), then showers Wednesday afternoon, cloudy with a good (50%) chance of showers Wednesday night, a good (50%) chance of showers Thursday, and rain likely (60%) Thursday night lows 46-38 highs- 50-45. 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 and breezy (wind: S 5-15 mph gusts to 30 mph increasing to SW 15-25 mph gusts to 40 mph late tonight (6-12 in. of snow possible), snow and rain and breezy (SW 15-25 mph gusts to 40 mph) Tuesday (4-8 in. of snow possible), snow showers Tuesday night (4-8 in. of snow possible), mostly cloudy with snow showers Wednesday (1-4 in. of snow possible), a good (50%) chance of snow showers Wednesday night and Thursday, and snow likely (60%) Thursday night snow level 5,500 ft. tonight falling to 4,000 ft. late tonight, 3,000 ft. Tuesday, 2,500 ft. Wednesday afternoon and Thursday lows 29-20 then rising to near 25 Thursday highs 31-25-30. Mostly cloudy with a good (50%) chance of snow Thursday, snow likely (60%-70%) Thursday night through Sunday snow level at the surface except 3,000 ft. Saturday highs near 30 lows between 25 and 28.
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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.