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Cold Storm Arriving Thursday - Snow Levels Down to 2,700 Ft.


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By: National Weather Service Sacramento CA

November 6, 2012 - A cold weather system from the Gulf of Alaska will move over Northern California on Thursday and Friday bringing much colder temperatures, some light valley rain and mountain snow. Although this is a weak storm, a significant drop in maximum temperatures will occur from one day to the next. The three main concerns: 15-20 degree drop in maximum temperatures from Wednesday to Thursday. 2-3" of snow down to 2700 - 3000 feet. 6-7" of snow at the Sierra mountain passes. Mountain pass winds will exceed 50mph.

TIMING

· Beginning Thursday early morning

· Most intense Thursday and Thursday evening with another wave of snow Friday during the day

· Ending Friday with lingering mountain snow showers into Saturday

LOCATIONS AND CONDITIONS

· Valley max temps in the 50s, foothills max temps in 30s.

· Valley Rain Insignificant ( < 0.1")

· Snow levels 2700-3000'

· Storm Total Snow:

2-3" snow at 3,000'
4-8" snow at mountain pass level
11" snow higher Sierra

· Mountain Pass winds > 50 MPH

IMPACTS

· Large drop in valley high temperatures

· First low elevation snow of the season

· Hazardous driving through mountains due to snow

· Strong High Sierra winds and localized blowing snow with reduced visibility

CONFIDENCE

· Moderate to high with this storm

 

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