MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Friday, November 22, 2019, 1000 Current Observations: 24hr Precipitation:      0 Temperature profile:    30 base,   34 ridge Pass level winds:            light westerly  Barometer:                 1019mbs and rising       Sky:                             clear Radar:              high clouds moving in with dry conditions state wide The Forecast: Temperatures will be few degrees warmer today with high clouds moving.  Heavy rain and high winds are expected tomorrow night with snow showers on Sunday. Long Range:  Lowering freezing levels and moderate snow showers will become the weather pattern through the middle of next week.  Wednesday and Thanksgiving Day will be dry with more active weather setting up for the weekend.    The Science:  A strong frontal system will slide down the BC coast over the next 24 hrs.  The precipitation is expected to start tomorrow afternoon and intensify overnight. Models show strong 5000’ winds accompanying this system.  Freezing level remain at or above 5000’ until the cold front passes sometime early Sunday morning.  Once the cold front passes, the moisture will switch to intermittent snow showers with falling temperatures.   Models are waffling on their interpretation of the Monday /Tuesdays storms.  So confidence in low on its outcome.   For now, snow showers with low freezing levels will be the pattern through the middle of next week. Based on the uncertainty of next week’s storm track -snow totals from 4am Sunday through Tuesday 4pm could range between 6” and 15”.   Confidence will hopefully improve through the weekend.   Confidence:  Good short-term, poor long range. Values from 4am today through 4am tomorrow. Precipitation: Today 24hr water: 0 snow: 0 Tomorrow’s 24hr water: .75-1  snow: 1-2 Trend and Timing: Dry through noon tomorrow with heavy rain expected tomorrow night. Temperature: Low: 30   High:0 38 Freezing level:  4000’ – 5500’ Trend and Timing:    Freezing levels will rise above 5000’ tonight.  Freezing levels drop below 4000’ early Sunday morning.   Winds Base: 0-5 W Ridge Top: 5-10 W strengthening Trend and Timing: Winds will be light today.  A high wind advisory goes into effect tomorrow with afternoon with 40+ ridge top winds possible.