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Here is your College Football forecast for Saturday

Looks like wet and cold for the Beavers home game Saturday vs. USC : Kickoff at 5 PM Cloudy 43 degrees and cooling with showers. Be prepared to bundle up and keep dry. The Ducks have a bye week.

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Here again is my new weather quiz question for this week. On average there are about 50,000 of these per day over the world and 10 million of them in a year. What kind of weather event am I describing? 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 airflow is bringing much colder air toward us both aloft and at the surface.  Another trough of low pressure will slide in along the coast sending more storms our way and dropping snow levels in the mountains. A complex frontal system will be moving into Oregon from British Columbia through Washington bringing with it cold air that will drop snow levels well below the passes. An arctic air mass will be pushed South by a strong jet stream (see airflow graphic above) and will move down behind that cold front between Monday and Tuesday giving us the possibility of some snowflakes even reaching the Valley floor.

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Advisories: A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL MIDNIGHT TONIGHT FOR THE NORTH AND CENTRAL OREGON COAST RANGE, FOR THE NORTHERN CASCADE FOOTHILLS AND THE FOOTHILLS OF LANE COUNTY, AND THE NORTHERN CASCADES INCLUDING THE CASCADES OF LANE COUNTY. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM SATURDAY FOR CENTRAL AND EASTERN 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 showers likely (60%) tonight (0.25 in. of rain possible) and  Saturday (0.25 in. of rain possible), mostly cloudy with a good (50%) chance of showers  Saturday night (0.10 in. of rain possible) and Sunday (under 0.10 in. of rain possible),  showers likely (60%) Sunday evening, a good (50%) chance of showers late Sunday night ( snow level 1,000 ft. no accumulation expected) (0.10 in. of rain possible), mostly cloudy with a (40%) chance of rain and snow showers Monday, a (40%) chance of snow showers Monday night, a mix of clouds and sun Tuesday, then partly cloudy with a slight (20%) chance of rain and snow showers Tuesday night lows 35-26 highs 42-34. A mix of clouds and sun Wednesday and Thursday (Thanksgiving Day), partly cloudy at night, then mostly cloudy with a slight (20%) chance of showers Friday  highs 38-42 lows 29-34. (seasonal averages highs 50 low 37)

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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with rain and snow showers this evening, rain and snow late tonight (snow level 2,000 ft.) (2-3  in. of snow possible), rain and snow Saturday and Saturday evening (snow level 1,500 ft. rising to 2,000 ft. in the afternoon) (1-2 in. of snow possible), rain and snow likely (60%) late Saturday night (snow level 2,000 ft. falling to 1,500 ft. late at night) (1-2 in. of snow possible), mostly cloudy Sunday with rain and snow showers likely (60%) (snow level 1,500 ft. rising to 2,000 ft. in the afternoon) rain and snow showers Sunday night and Monday (snow level 1,500 ft. Sunday night), mostly cloudy with a (40%) chance of rain and snow showers Monday night lows 36-33 highs 42-38. Patchy AM fog Tuesday then just mostly cloudy in the afternoon, mostly cloudy with a slight (20%) chance of showers Tuesday evening with patchy fog late at night and Wednesday AM, partly cloudy in the afternoon and evening, then mostly cloudy at night with patchy fog, patchy AM fog and late night fog Thursday (Thanksgiving Day) and Thursday night, and patchy AM fog Friday then mostly cloudy with a slight (20%) chance of showers Friday afternoon highs 38-43 lows 32-36. (seasonal averages high 54 low 39)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with coastal showers and isolated thunderstorms this evening and rain late tonight,  inland showers this evening, then rain and snow late tonight (snow level 2,000 ft. no accumulation expected), AM coastal rain Saturday, AM rain and snow inland, then rain and isolated thunderstorms Saturday afternoon (snow level 1,500 ft. rising to 2,000 ft in the afternoon no accumulation expected), evening coastal rain and isolated thunderstorms and rain likely (60%) late Saturday night, evening rain and snow inland then rain and snow likely (60%) late at night ( snow level 2,000 ft. lowering to 1,500 ft. late at night no accumulation expected), mostly cloudy Sunday with a good (50%) chance of coastal showers then showers Sunday afternoon, a good (50%) chance of AM rain and snow showers inland then rain and snow showers likely (60%) in the afternoon, (snow level 2,000 ft.), coastal showers Sunday night, evening showers then rain and snow showers late Sunday night inland (snow level 2,000 ft.),  rain and snow showers Monday AM, showers in the afternoon, a good (50%) chance of evening showers, then a (40%) chance of rain and snow showers late Monday night lows 39-35 highs 44-46. Patchy fog Tuesday AM, mostly cloudy Tuesday afternoon, a slight (20%) chance of showers Tuesday night with patchy fog late, then just mostly cloudy with AM and late night fog and some lingering fog,  then partly cloudy Wednesday through Thursday night (Thanksgiving Day) with early AM and late night fog and some lingering fog, patchy AM fog, then mostly cloudy with a slight (20%) chance of showers Friday highs 44-52 lows near 33. (seasonal averages high 56 lows 42).

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Forecast for the Cascades of Lane County:  Cloudy with snow showers this evening and snow showers likely (60%) late tonight (2-5 in. of snow possible) through Monday (3-6 in. of snow possible Saturday, 2-5 in. each Saturday night and Sunday, 3-7 in. Sunday night),  mostly cloudy with a good (50%) chance of snow showers Monday night,  a mix of clouds and sun Tuesday, mostly cloudy with a slight (20%) chance of snow showers Tuesday night snow level at the surface through Monday night, free air freezing level at the surface Tuesday, snow level at the surface Tuesday night lows 24-18 highs 29-23. Partly cloudy with a slight (20%) chance of snow showers Wednesday, partly cloudy Wednesday night, a mix of clouds and sun Thursday (Thanksgiving Day), partly cloudy Thursday night, and mostly cloudy with a slight (20%) chance of snow showers Friday snow level at the surface Wednesday, free air freezing level 3,000 ft. Wednesday night through Thursday night, and a snow level 2,500 ft. Friday highs 25-30 lows 15-24.

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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.