MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Wednesday 10:00am

Current Observations:

24hr Precipitation: Lightly snowing with 9” of snow,  density =12%

Temperature profile: 31base/

Pass level winds: W 5-10mph

Barometer: 1021mb’s rising

Sky: Lifting clouds with breaks beginning

Radar: Dissipating precipitation and cloud layers

The Forecast: There will be little additional snow accumulation expected for the rest of the day.  Tomorrow a strong warm front will bring a short period of moderate rain below 5000’.   Friday will be mostly dry with partial clearing.   

Long Range: Cooler with light snow showers are expected on Saturday with another system (snow) developing for Sunday.   

  

The Science:  A strong tightly packed, fast moving low pressure system will track up the PNW coast tomorrow.  This will bring a spike in freezing levels and a short lived dose of rain.   The good news is that this is fast moving with a cold front hot heals.  Cooler upper air, accompanied by a ridge of high pressure will produce a dry day on Friday. We might even get a glimpse of the sun.   

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .25 snow: 1-3 Tomorrow’s 24hr water: .75  snow: 0-4 Trend and Timing: Light snow showers persist today.  Mixed rain and snow event arrives after 7am tomorrow morning.

Temperature: Low: 28    High:32 Freezing level: 3500’ -5500’ Trend and Timing:    Freezing level will rise above 40009’ overnight and peak around 5500’ tomorrow afternoon.

Winds Base:  5-10 W shifting E Ridge Top: 5-15 W shifting SSE Trend and Timing: Westerly wind will taper off today and shift ESE overnight.