MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Tuesday, 4:00 pm

The Snapshot: Mixed snow and rain tonight with temperatures falling into the lower 30’s.   Less than an inch of snow is expected below mid-mountain with an inch or two possible on the upper ridge.  Things quickly dry out tomorrow for a couple of dry and partly cloudy days planned.  Another, more potent, system moves in on Friday with the weekend trending dry.  

The Science: A low-pressure system with an embedded cold front will swing through the region this evening. There are some tightly pack bands of precipitation coming along for the ride which has been the source of these off and on showers all day.  This is a quick moving frontal system with pressure gradients weakening overnight.  A flattening upper ridge begins the drying phase tomorrow. 

The Forecast:  The precipitation will be a moderate intermittent showery pattern through midnight and then begin to taper off as morning approaches.  Freezing levels will dip to 4000’ tonight with temperatures quickly recovering into the mid 40’s as tomorrow matures.     

The Long Range:  Another frontal system arrives on Friday with moderate to heavy rain and freezing levels in the 5500-6500’ range.   There is a fairly large high pressure system stationed offshore that, if it decides to drift east, will bring another prolonged period of dry weather starting this weekend.    

 Daily values from 4am today through 4am tomorrow.

Precipitation: Today 24hr water: .25”   snow:.5” Tomorrow’s 24hr water: .10  snow: 0 Trend and Timing: Mixed snow and rain through the night with moisture tapering off tomorrow morning.

Temperature: Low: 30    High: 45 Freezing level: 4000’ – 5000’ Trend and Timing:    The temperature will fall tonight and then recover back into the mid to upper 40’s tomorrow.

Winds Base: 5-10 W Ridge Top: 10-20 W Trend and Timing: Some gusty westerly wind will accompany the front tonight.  Ridgetop winds could see gust +20 for a few hours tonight. Winds will diminish and shift easterly tomorrow.