MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Wednesday 0630

Current Observations:

24hr Precipitation:  0

Temperature profile: 23 base, 17 ridges

Pass level winds: light - ESE

Barometer: 1003mb’s and falling

Sky: OC

Radar: Light snow falling east of Wenatchee.

The Forecast:  Warmer today with light passing snow showers likely.  Snow showers continue tomorrow with a few inches of new snow possible.  

Long Range: The snow diminishes on Friday; the weekend we be partly sunny with temperatures in the 30’s.  

  

The Science: The falling barometer is the clue that things are beginning to change.  The low pressure system that has been parked over Northern California will begin to move north.  Light precipitation and warmer air will spread into the region today with cooler westerly flow developing tonight.   

A cold front will swing through tonight shifting the flow to NW and drop freezing levels a bit.  There isn’t a ton of moisture associated with this system but good orographics may give us a bit of snow to play with tomorrow. 

A high pressure ridge nudges in over the weekend cutting off the moisture and stabilizing the atmosphere.

Forecast confidence: Fair – weak convergence zone targets and timing are in question.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .25  snow: 1-3 Tomorrow’s 24hr water:.25-.5   snow: 3-5 Trend and Timing: Light snow showers will develop today and continue through tomorrow.

Temperature: Low:18   High:30 Freezing level: +- 2500’ – 2000’ Trend and Timing:    Freezing levels will rise above 2000’ today and then fall back to or just below 2000’ tonight.

Winds Base: 0-10 E shifting W Ridge Top: 5-15 W Trend and Timing: Winds will shift westerly this afternoon and become gusty tonight.