MOUNTAIN WEATHER FORECAST

Time and Day: 0730 Sunday

 

The Snapshot: 1" of snow overnight. Moderate to heavy snow starting today and continuing through Tuesday morning. High pressure building for mid-week.

The Science: A strong cold front associated with a deep low pressure system off the coast will cross Stevens Pass today. Cool and moist WNW upper level flow will maintain good orographic snow showers following the front. Convergence effects may be a factor with this event. The exact track of the low pressure center will determine wind speeds this afternoon, but the general setup will be unaffected and heavy snow is expected. Moderate snow will continue Monday through Tuesday morning.

The Long Range: Snow showers should end Tuesday, with cool temperatures. High pressure and warming should begin mid-week.  

Precipitation Ending at 4am: Today 24hr water = .75 Snow = 8-10"   Tomorrow’s 24hr water = .5 snow = 4-6"   Trend and Timing: Moderate to heavy snow beginning this afternoon, with a burst of convergence showers early Monday morning. Snow showers continuing during the day Monday and ending Tuesday morning.

24hr temperature ending at 4 am tomorrow: Low: 24 High: 30 Freezing level: 3000' lowering to 2000'   Trend and Timing: Temperatures will cool further behind the front this afternoon, remaining well below pass level through Tuesday.

24hr Winds (mph) ending at 4 am tomorrow: Base:  5-15 E shifting W 10-20 Ridge Top: SE 15-20 shifting W 20-30    Trend and Timing: East winds will strengthen ahead of the cold front, shifting to strong and gusty west winds this evening and tomorrow morning.   253 Dan