MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Monday, 11/11/2019  -  0800

Current Observations:

24hr Precipitation:                0                                 

Temperature profile:            31base, 29ridge                      

Pass level winds:                    Light easterly 

Barometer:                             1026mb’s and holding                       

Sky:                                         high cirrus clouds                  

Radar:  Offshore flow with light rain falling in the Strait of Juan De Fuca.

The Forecast: Dry today with increasing clouds, light rain tomorrow.

Long Range:  Wednesday and Thursday will be mostly dry with some light rain showers possible.  The weather pattern turns wet and more progressive on Friday.  

  

The Science:  The weakening high pressure ridge stationed over the PNW will struggle to hold off the approaching moisture.  A weakening cold front will sag south over the next 24hrs bringing light rain to the Pass and a dusting of snow for the alpine.  Winds will be finicky as pressure gradients tighten along the crest.  Freezing levels will be generally above Pass level through the weekend- so no significant snow accumulation expected below 5000’.   

The good news is that the pattern is changing to a more progressive W/ NW flow pattern over the next 7-10 days.   Time will tell on what that will bring.  

Confidence: High for short term, moderate for long range.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 0 snow: 0 Tomorrow’s 24hr water: .25  snow:  Trace on the upper ridge. Trend and Timing: Rain arrives after 4am tomorrow with light rain expected through the day.

Temperature: Low: 32   High: 42 Freezing level: 5000’ – 6500’ Trend and Timing:     Freezing level will stabilize around 5500’ for the next few days.

Winds Base: 5-10 E Ridge Top: 5-10 E Trend and Timing: The east flow today shift westerly tomorrow.