November 20, 2012

11/20/2012 Stevens Pass Mountain Weather Forecast

General Discussion: The next front, expected to pass over the mountain in a few hours, will bring light precipitation to the mountains this afternoon. Tomorrow will be cool, windy and snowy.

Long-term: Turkey day will generally dry as a weak upper level ridge passes over the mountains. Another warm front, approaching from the southwest, will bring rising freezing levels and more precipitation to the mountains on Friday/Saturday.

24hr Accumulative Precipitation Totals Starting at Noon Today:
“Water by midnight=.10
“Of additional water by 4am= >.10
“Of additional water by 12pm= .25

24hr (12pm-12pm) Inches of Water = .25 -.5

24hr (12pm-12pm) Inches of Snow = 4-6

Trend and Timing:
Most of the snow will happen after 4am tomorrow morning with just light showers this afternoon and evening. Snow will begin to taper off late tomorrow afternoon.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 28 High: 34
Freezing level: 4500’ 3500’

Trend and Timing:
Freezing levels will slowly diminish through the night. Surface temperature should stay below freezing through early Thursday morning.

24hr Winds Speed (mph)/Direction Starting at Noon Today
Base: 0-10 E shifting W
Ridge Top: 5-10 E shifting W and strengthening

Trend and Timing:
East flow will continue tonight and then shift westerly tomorrow. A high wind event with gust of +20-40mph will be possible as strong westerlies develop during the day tomorrow.









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