December 14, 2019

MOUNTAIN WEATHER FORECAST


Stevens Pass Mountain Weather Forecast
Date: Saturday, December 14, 2019


Current Observations:
24hr Precipitation: .25” SWE / 3” snow           
Temperature profile: 28 base / 24 upper mtn   
Pass level winds: Light, westerly                      
Barometer:  1011 steady                                  
Sky: Mostly Cloudy                 
Radar: Spotty showers throughout western Washington


The Forecast: Mostly cloudy, cool, light snow flurries.

Long Range: Next week starts out cool and dry, with the possibility of active weather returning for the second half.  
  
The Science: Continued NW upper level flow on the downstream side of a ridge in the Pacific will bring light, spotty snow showers and partly-mostly cloudy skies on Saturday with cooling temperatures. As the ridge nudges in on Sunday it will cut off what little moisture we’re still getting and allow a cool, continental airmass to move further south. This will bring further cooling, clearing skies, and very light snow to the mountains.

Confidence: Good.

Values from 4am today through 4am tomorrow.
Precipitation:
Today 24hr water: .10”   Snow: 1-2”

Tomorrow’s 24hr water:  < .10”   Snow: trace

Trend and Timing:
Light snow showers Saturday, a few flurries possible Sunday morning.

Temperature:
Low:  22   High: 28
Freezing level: 2000’

Trend and Timing:   
Cooling throughout the day and overnight.
 
Winds
Base: W 0-5
Ridge Top: W 5-15

Trend and Timing:
Light winds all day.

Dan

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0800 Start Mon Feb 2nd, no ABS