MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Friday, February 21, 2020, 0830

Current Observations:

24hr Precipitation:              0

Temperature profile:          23 base,   30 ridge

Pass level winds:                 light SW

Barometer:                         1019mb’s and falling

Sky:                    clear to the east with high clouds moving in from the west

Radar:                no radar echo’s throughout the region

The Forecast:  Warm today with increasing clouds.  Light mixed rain and snow arrives tomorrow morning with moderate snow expected on Sunday.

The Science: Warm SW flow has kicked in this morning. This will push freezing level up to +-5000’.  Day time temperature could reach into the 40’s with the aid of the sun today.  The high cirrus clouds developing are the indicator of the approaching system getting ready to make its move.  Very light precipitation begins tomorrow with light passing showers and patchy sunbreaks expected. 

 A strong cold front swings in Sunday morning with moderate to heavy snow and falling temperatures likely through the day.  Early snow calculation’s show 10-12” by Monday morning.

 

Long Range:  A drying trend begins early next week as another ridge of high pressure builds over the region.   

Forecast confidence: Good.

Values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water:  0 snow: 0 Tomorrow’s 24hr water: .25  snow:  trace Trend and Timing: Dry today with light moisture arriving after 4am tomorrow.

Temperature: Low:  23   High: 40 Freezing level:  4500’ Trend and Timing:    Freezing levels will bump up to +4500’ today and hover at that elevation through tomorrow.

Winds Base: 0-5 W Ridge Top: 5-10 W Trend and Timing: Light westerly flow through the night with ridge top winds increasing tomorrow afternoon.