MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time:  Tuesday 0700

Current Observations:

24hr Precipitation:  0

Temperature profile: 18 base, 11 ridge

Pass level winds: light with moderate gusts and out of the ENE

Barometer: 1016mb’s and falling

Sky: clear  

Radar: dry and clear

The Forecast:  One more clear day with high clouds moving in tonight.  Light snow showers with warmer temperatures can be expected tomorrow.

Long Range: Snow showers will continue into Friday with the weekend trending dry and warm.   

  

The Science:  Today will be the final day of the cold, dry offshore flow that has dominated the weather as of late.  Tomorrow, bands of moisture associated with a weak low pressure system will bring a few days of intermittent snow showers.

The general pattern is under a slow change with warm air advection beginning creep in and a shift to NW flow expected by the weekend. The first high pressure ridge that we have seen is some time, will likely set up a split flow pattern on Saturday.  This will cut off the moisture and bring clear and warmer weather to the mountains.   Freezing levels and daytime temperatures will return to seasonal averages (+30s).

Forecast confidence:  Confidence is good for today and fair for the precipitation timing and amounts tomorrow.  

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 0  snow: 0 Tomorrow’s 24hr water: .25   snow: 1-3 Trend and Timing: Light snow shows up after 4am tomorrow with periods of snow expected to fall through the day.

Temperature: Low:18   High: 26 Freezing level: +2500’ Trend and Timing:    Freezing levels are on the rise.

Winds Base: 0-10 E gusty Ridge Top: 5-15 E gusty Trend and Timing: Winds will remain gusty through morning and then begin to diminish tonight.