MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Tuesday, December 24, 2019, 0730

Current Observations:

24hr Precipitation:      0

Temperature profile:    19 base, 21 ridge

Pass level winds:            light, easterly

Barometer:                  1007mb’s and falling

Sky:                               clear

Radar:      The state is mostly clear and dry this morning.  There is moisture offshore following weak warm front. The front is now over Aberdeen Wa

The Forecast:  Increasing clouds today with light snow flurries expected tonight.  Christmas day will be partly cloudy and dry.

Long Range.  Warming with a chance of snow arrives on Friday and then another possibility for moisture is expected on Sunday.    

  

The Science:  A weak warm front will slowly drift across the southern tier of the Cascades today.  There will have little effect for Stevens Pass other than a few light passing showers tonight.  Pressure gradients will remain weak with mid to upper barometer readings (high pressure).

Some weak systems will try and make their way through over the next 3-5 days. These system are not packing much of a punch so no significant snow events are expected.  There is a warmer air mass associated with this slight pattern change, so we can expect a warmer temperatures heading into the New Year.   

Confidence:  Good short term, fair long term.

Values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water: .10 snow: trace    Tomorrow’s 24hr water: .10  snow: trace Trend and Timing: Light snow showers late tonight into early tomorrow morning.

Temperature: Low: 22   High: 26 Freezing level: 2000’ Trend and Timing:    There is a slight temperature inversion this morning. Freezing levels will remain well below Pass level through tomorrow with warming expected on Friday.

Winds Base: 0-5 ENE Ridge Top:  0-5 W shifting E Trend and Timing: Generally calm winds are expected through tomorrow with very weak pass level east flow.