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Here is my weekly weather quiz question. What is a fire tornado? Please post your answer as a comment by clicking on “no 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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The jet stream shows a trough of low pressure ( “U” shaped area) preparing to swing down bringing winter weather with it. A burst of cold Arctic air will hit behind a cold front that will slide down from the North. All of this could spell “snow storm” for all of the Pacific Northwest between Wednesday night and Friday.

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Advisories: A WINTER STORM WARNING IS IN EFFECT UNTIL 10 PM THURSDAY FOR THE NORTH AND CENTRAL OREGON COAST RANGE, THE NORTH OREGON CASCADE FOOTHILLS AND THE FOOTHILLS OF LANE COUNTY, THE NORTH OREGON CASCADES AND THE CASCADES OF LANE COUNTY. A WINTER STORM WARNING IS IN EFFECT FROM 6 AM WEDNESDAY UNTIL 10 PM THURSDAY FOR THE NORTH OREGON COAST, THE LOWER COLUMBIA-I-5 CORRIDOR, THE GREATER PORTLAND AND VANCOUVER AREAS, AND THE WESTERN COLUMBIA RIVER GORGE. A WINTER STORM WARNING IS IN EFFECT FROM 2 PM WEDNESDAY UNTIL 10 PM THURSDAY FOR THE CENTRAL AND SOUTH WILLAMETTE VALLEY. A WINTER STORM WARNING IS IN EFFECT FROM 2PM WEDNESDAY UNTIL 10 PM THURSDAY FOR THE CENTRAL OREGON COAST. A WINTER STORM WATCH IS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY AFTERNOON FOR THE SOUTH CENTRAL AND SOUTH OREGON COAST, CENTRAL DOUGLAS COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS,  THE SOUTH CENTRAL AND SOUTH OREGON CASCADES AND SISKIYOU MOUNTAINS, JACKSON COUNTY, EASTERN CURRY, AND JOSEPHINE COUNTY, AND THE SOUTH CENTRAL OREGON CASCADES.

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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: Cloudy with showers likely (60%) this evening, rain and snow showers likely (60%) late tonight (snow level 1,000 ft. 2 in. of snow possible), rain and snow Wednesday (snow level 500 ft. in the afternoon, 1-4 in. of snow possible above that level), snow Wednesday night (1-4 in. of snow possible down to the valley floor), AM snow Thursday, afternoon snow showers (1-2 in. of snow possible), a (40%) of snow showers Thursday night and Friday, and partly cloudy with a slight (20%) chance of snow showers Friday night lows 33-13 highs near 38.  Partly cloudy Saturday, mostly cloudy with a slight (20%) chance of rain and snow showers Saturday night, a slight (20%) chance of showers Sunday, then mostly cloudy with a (40%) chance of showers Sunday night through Tuesday highs 42-48 lows 28-35 cooling to 32 Monday night. (seasonal  averages high 52 low 35)

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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with rain and snow showers likely (60%) tonight (snow level 1,500 ft. falling  to 1,000 ft. late, 1 in. of snow possible), rain and snow showers Wednesday (snow level 500 ft. rising 1 in. of snow possible) and snow showers Wednesday night (3 in. of snow possible at lower elevations with 2-4 in. above 1,500 ft.),  Snow showers Thursday, snow showers likely (60%) Thursday night lows 33-24 highs 45-40. Mostly cloudy with a (40%) chance of snow showers Friday,  a (30%) chance snow showers Friday night, just partly cloudy Saturday, mostly cloudy with a slight (20%) chance of snow showers Saturday night through Sunday night, then a (30%) chance of rain and snow Monday through Tuesday highs 40-48 lows 24-35. (seasonal averages high 56 low 37)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with coastal showers likely tonight with evening showers likely (60%) inland and rain and snow showers likely (60%) inland late tonight (snow level 2,000 ft. falling to 1,000 ft. late), coastal showers with rain and snow showers inland Wednesday (snow level 1,000 ft. 1 in. of snow possible), evening coastal showers then snow showers late at night with snow showers inland Wednesday night (snow level 1,000 ft. 1-3 in. of snow possible),  snow showers Thursday, then snow showers likely (60%) Thursday night,  a good (50%) chance of rain and snow showers Friday and a slight (20%) chance of rain and snow showers Friday night lows 35-25 highs 45-40. Partly cloudy Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night through Sunday night, mostly cloudy with a (40%) chance of showers Monday through Tuesday highs 42-46 lows 34-37 (seasonal averages high 55 low 41).

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Forecast for the Cascades of Lane County:  Mostly cloudy with snow tonight (6-12 in. of snow possible),  snow Wednesday (6-12 in. of snow possible), and breezy (wind: SW 15-25 mph), snow (5-10 in. of snow possible) and colder Wednesday night, AM snow Thursday, snow showers Thursday afternoon (3-6 in. of snow possible), snow showers and colder Thursday night (1-4 in. of snow possible), a (30%) chance of snow showers Friday, and partly cloudy with a slight (20%) chance of snow Friday night snow level at the surface tonight through Friday night lows 22-5 highs 24-20-8. Partly cloudy Saturday, mostly cloudy with a slight (20%) chance of snow showers Saturday night and Sunday, then mostly cloudy with a (30%) chance of snow showers Sunday night through Monday night, and (40%) Tuesday free air freezing level at the surface Saturday,  snow level at the surface Saturday night through Tuesday highs 25-26 lows 16-25.

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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.