MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Thursday, February 6, 2020, 1300

Current Observations:

24hr Precipitation:      2.34swe, 14”

Temperature profile:    32 base, 30 ridge

Pass level winds:            light to moderate westerly

Barometer:                  1013mb’s

Sky:                          Obscure and snowing

Radar:        widespread precipitation tracking NE through the region.

The Forecast:  Heavy snow will continue through tomorrow.  There will be a chance of some mixed rain at Pass level this afternoon /evening.

The Science:  Strong unstable westerly flow with convergence zone development will continue to pull in copious amounts of moisture through Saturday morning.  There will be a brief lull between systems tomorrow morning with the next push of heavy snow arriving tomorrow night.  Cooler air arrives tomorrow afternoon with freezing levels finally dropping below 4000’ late tomorrow night.  

Long Range. A drying trend begins on Sunday with next week starting out dry with clear periods.

Confidence:  Good.

Values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water: 1.5-2 snow:  8-11 base, 14-18 upper ridge Tomorrow’s 24hr water: 1   snow: 10-14 Trend and Timing: Heavy snow continues through the night.

Temperature: Low:  30  High:  34 Freezing level: +- 4500’ Trend and Timing:    Freezing levels will peak near 5000’ this afternoon the slowly fall through the day tomorrow.

Winds Base: 5-10 W  gusty Ridge Top: 10-20 W Trend and Timing: Ridge top winds will intensify this afternoon with sustained ridge top winds through the night.