MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Thursday 0600

Current Observations:

24hr Precipitation:  5” of snow fell yesterday with 0 overnight.  

Temperature profile: 23b / 22r

Pass level winds: a little gusty this morning 5-10 W

Barometer: risen to 1018mb’s

Sky: broken clouds to the west with clear conditions developing over the eastern basin

Radar: there are a few spotty snow showers showing up along the low elevations western slopes.   

The Forecast:  Light passing snow showers this morning with dry conditions tonight.   Snow changing to mixed rain arrives tomorrow afternoon with rain changing back to snow sometime Saturday.

Long Range: Things begin to dry out on Sunday as high pressure builds over the region.   

  

The Science: A weak high pressure ridge passing through the region today will produce a peaceful day with light NW winds.  Temperatures will hold steady in the mid to lower 20’s.  A good sliding day.

A likely scenario for tomorrow’s triple point storm will be snow beginning tomorrow afternoon, changing to rain early Saturday morning, and then back to snow by Saturday afternoon.  Freezing levels will bump up to 5500’ early Saturday morning and then fall back through the day.   High pressure building over the PNW waters will bring and end to the action on Sunday/Monday.   

Timing and intensity for all this is still very much in question so confidence is low at the moment.  

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .10 snow: Trace Tomorrow’s 24hr water: .75-1  snow: 4-8 Trend and Timing: Mostly dry through noon tomorrow with snow beginning mid to late afternoon tomorrow.

Temperature: Low: 22    High: 26 Freezing level: +- 2500’ Trend and Timing:    Freezing levels will hold around 2500’ through early tomorrow morning.

Winds Base: 0-5 W Ridge Top: 5-10 NW Trend and Timing: Light NW flow aloft will continue today - winds shift easterly tomorrow.