MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time:  Thursday 0700

Current Observations:

24hr Precipitation: 0

Temperature profile: 10base, 9 ridges

Pass level winds: light and easterly

Barometer: holding @ 1020mbs

Sky: mostly clear  

Radar: Dry with some moisture popping up offshore.

The Forecast: High clouds will move into day with light snow expected tomorrow.

Long Range: Light to moderate snow showers, gusty easterly winds and cool temperatures can be expected through the weekend.

  

The Science:  A complexed and somewhat unusual weather pattern will move through the PNW over the next few days.  A low pressure system developing over the Canadian Rockies will begin to track South West.  This will draw moisture off of the pacific waters and bring cold arctic air along for the ride. As this system slowly slides south, it will spin bands of light to moderate snow showers through the region.  Freezing levels will remain at or even below sea-level with lowland snow likely. 

In the long term, the upper level flow will be northerly with a cold and relatively dry air mass in tow.  Therefore, next week’s outlook will be mostly dry and cold.  The atmosphere will remain unstable through this period so clouds and occasional light snow showers will be possible.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: <.10  snow: Trace Tomorrow’s 24hr water: .25-.5  snow: 3-6 Trend and Timing: Light snow begins tomorrow morning with light to moderate showers moving through Friday night into Saturday.

Temperature: Low: 10  High: 22 Freezing level: 0- 500’ Trend and Timing:    Freezing levels will remain +- 500’ through the weekend.

Winds Base: 0-5 E Ridge Top: 0-10 E Trend and Timing: Light east flow will continue through the day.