MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: 0730 Monday

The Snapshot:  Mixed snow and rain is expected today.  A drying trend begins tomorrow with clear and dry weather finishing out the week.

 

Current Observations:

Precipitation:  Mixed rain and snow falling  

Pass temperature: 35

Winds: 5-10 W

Barometer: 1013mb’s and holding

Sky: Dark and overcast

Radar: Snow (4500’) and rain falling along the west slopes.

The Forecast:  Mixed snow and rain will begin to diminish tomorrow with a drying trend setting in on Wednesday.  Freezing levels will settle around 4500’ today and slowly rise as the week progresses.  

Long Range: Wednesday through Friday will be mostly dry with daytime temperatures in the mid to upper 30’s.  A prolonged dry period lasting through the weekend is likely.

  

The Science:  Unstable NW flow streaming into the PNW is the driver for this steady stream of moisture.  A weak low pressure system, working its way down from the interior north, is the mechanism for the cooler air to mixing in.   

The high pressure ridge moving up the western coast will begin to dry up and stabilize the atmosphere tomorrow.  Models have the barometric pressure rising to1031mb’s by Thursday morning with freezing levels pushing above 5000’.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .75  snow: 2-5 Tomorrow’s 24hr water: .25  snow: 1-2 Trend and Timing: Mixed rain and snow will continue through the night and begin to taper off tomorrow.

Temperature: Low:30     High: 36 Freezing level: +- 4500’ Trend and Timing:    Freezing levels will hover around 4500’ for the next 24-36hrs.

Winds Base: 5-10 W Ridge Top: 5-10 WNW Trend and Timing: The winds will be generally light and out of the west.