Mountain Weather Forecast

Stevens Pass Mountain Weather Forecast

Day and Time: Monday 0800

Current Observations:

24hr Precipitation: .5 (measured at study plot)
24 hr Snow: 6"

Pass temperature: 29

Pass level winds:  5-10 W

Barometer:  1017 and steady 

Sky: overcast

Radar: Light showers in the mountains and over Puget Sound.

The Forecast:   Steady temperatures and light snow showers today. Mostly cloudy with light westerly winds. Heavy snow begins Tuesday morning and continues thru Tuesday night. 

Long Range: After Tuesday's heavy snow event, Wednesday will bring a relative lull with a dirty ridge (a relative high pressure feature with moisture associated with it). Continued NW upper level flow brings another system Thursday, and another for the weekend. Active weather in store for the foreseeable future. 

  

The Science: Last nights cold front delivered nicely, with light orographic snow showers continuing this morning. A strong triple point frontal system is approaching in NW flow aloft. There will be warming midday Tuesday with this feature, with freezing levels coming right up to Pass level. Temperatures will drop when the associated cold front sweeps through. A variety of lifting mechanisms will be in place to produce heavy precipitation. Currently the heaviest snow is timing out to be Tuesday afternoon and evening. 

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .25   snow: 2-4" Tomorrow’s 24hr water: 2+  snow: 18" +/- Trend and Timing:  Light snow showers today and tonight. Heavy snow Tuesday and Tuesday night.

Temperature: Low: 25    High: 31 Freezing level: 3500' Trend and Timing:    Steady temperatures during the day Monday and Monday night.

Winds Base: 5-10 W  Ridge Top: 5-15 SW Trend and Timing: Winds have shifted and will remain from the west/southwest thru Tuesday morning.