December 2, 2019

MOUNTAIN WEATHER FORECAST


Stevens Pass Mountain Weather Forecast
Date: Monday, December 2, 2019


Current Observations:
24hr Precipitation:     .12 SWE / 3” snow     
Temperature profile:  31 base / 33 mid mtn
Pass level winds:   Light W                 
Barometer:  1015 mb and steady                               
Sky:     Overcast                     
Radar:  Spotty light showers west of the crest


The Forecast: Cloudy with light rain ending midday today, dry and mild Tuesday with rain beginning late afternoon.

  
The Science: Weak NW flow aloft is driving warmer air and light rain showers across Washington. A transitory short wave ridge will cross the area Monday afternoon and Tuesday for mild weather and potentially some clearing. Zonal flow to our north Tuesday night brings the next weather system to our area, but freezing levels continue to look above pass level. Moderate precip, likely rain, will fall Tuesday night and Wednesday with light snow possible at the tail end of the event on Wednesday.

Long Range:  Thursday looks mostly dry, a low pressure system is slated to approach our region on Friday and Saturday with more favorable freezing levels, stay tuned for details.


Confidence: Good thru Tuesday night, poor for Wednesday forward.

Values from 4am today through 4am tomorrow.
Precipitation:
Today 24hr
water: LT .10 snow: 0”

Tomorrow’s 24hr
water: .5”  snow: 0”

Trend and Timing:
Light precip ending Monday morning, dry thru Tuesday afternoon.

Temperature:
Low: 31   High: 34
Freezing level: 5000’

Trend and Timing:   
Slight warming during the day.  
 
Winds
Base: W 5-10
Ridge Top: W 5-15

Trend and Timing:
Steady light to moderate west winds.

Dan

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0800 Start for Sunday 2/1/26, no ABS