MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Friday, February 7, 2020, 1130

Current Observations:

24hr Precipitation:        2.37swe, 16” of snow

Temperature profile:     33base,  33ridge

Pass level winds:             Light westerlies

Barometer:                    1013mb’s and holding

Sky:                              overcast lightly raining

Radar:       Scattered rain showers along the western slopes of the mountains

The Forecast:  Increasing mixed rain and snow this afternoon turning to snow with falling temperatures overnight.   Snow ends tomorrow afternoon with Sunday trending dry with sun breaks.

The Science:  A low pressure cell, with and embedded cold front will bring the next push of moisture to Stevens Pass tonight.   Cooler NW flow will fill in behind the front for falling freezing levels.  Moderate to heavy snow can be expected through the night with the precipitation quickly ending mid-day tomorrow.  

A legit high pressure ridge develops over the PNW starting tomorrow afternoon. This will produce mostly dry and clear weather for the region. 

Long Range. Dry, cool and clear weather develops tomorrow and last into early next week.   

Confidence:  

Values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water: .75-1 snow: 10-14     Tomorrow’s 24hr water: .25-.5   snow: 2-4 Trend and Timing: Snow ramps up after 4pm today.  Heaviest period will be between midnight and 7am.   Snow quickly tapers off tomorrow morning.

Temperature: Low: 26   High: 34 Freezing level: 4500’ – 2500’ Trend and Timing:    Freezing levels will begin to fall after 4pm today with cooler temperature settling in tomorrow.

Winds Base: 5-10 W Ridge Top:  10-20 W  Trend and Timing: Winds will pick up this evening with the passing of the front.  Winds should diminish and shift NW tomorrow.