Stevens Pass Mountain Weather Forecast

Friday, December 27, 2019, 0730

Current Observations

24hr Precipitation:        .05 SWE,  2’”

Temperature profile:      23 base,  23 ridge

Pass level winds:              Lights, westerly

Barometer:                    1013mb’s and holding

Sky:                            OC and snowing

Radar:           Convergence snow showers in the I-90 corridor and Hwy 2 with scattered showers to the west.

The Forecast:  Snow this morning shifting to intermittent showers tonight.  Mostly dry with a few left over flurries tomorrow.   A repeat performance with another few inches of snow will be possible on Sunday.  

Long Range. Next week starts out warm and dry with more active weather heading into the New Year.   

  

The Science:   Westerly flow with a weak convergence zone effect has kick-in this morning with light snow falling.   A high pressure ridge will drift into place overnight producing a mostly dry day with patchy clouds tomorrow.

A low pressure system with an embedded warm front will bring another round of moisture on Sunday with rising freezing levels.  Next week will start out dry with temperatures above freezing. 

 Models diverge with their take on what may or may not happen next week – but, safe to say that we will be in active weather pattern with systems passing through every over other day or so.  Temperatures are on the uncomfortably warm side of things so we will have to see how the freezing levels play out through the week.      

Confidence:  Good to fair

Values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water: lt. 25  snow: 1-3    Tomorrow’s 24hr water: .10   snow: trace Trend and Timing: Snow shifts to shower this afternoon and tapers off overnight.

Temperature: Low: 23    High:  26 Freezing level: 1500’-3000’ Trend and Timing:    Gradual warming will occur over the next 24-36hrs.

Winds Base: 0-10 W Ridge Top: 5-10 W     Trend and Timing: Winds will be light and westerly today. Surface flow shifts back to easterly tomorrow morning.