11/4/2013  Stevens Pass Mountain Weather Forecast

Time: 11:00am

 

A Snapshot: Sunshine today will give way to mixed rain and snow tonight and tomorrow.  Wednesday will be mostly dry with another system arriving on Thursday.

 

Atmospheric Science: A weak warm front approaching the PNW coast will create more precipitation tonight and tomorrow. A high pressure ridge will build tomorrow night for a short lived dry period on Wednesday.  The atmosphere will remain unstable under NW flow through the middle of next week –a typical seasonal pattern.  

 

4-7day Long Range: Another front, producing mixed rain and snow below 4500’ is expected to move through the mountains on Thursday/Friday.  The weekend through the middle of next week looks to be mostly dry for now.

 

24hr Accumulative Precipitation Totals Starting at Noon Today:   Water by 4am = .25 Snow equivalent = 2-4”   Total inches of water by noon tomorrow = .5 Total inches of snow by noon tomorrow = 2-4”,  3-5” upper mountain   Trend and Timing: Snow changing to mixed rain and snow will arrive sometime this evening and continue through tomorrow.  Light passing showers with sun breaks will continue into Wednesday.

24hr Base Area Temperatures (F) Starting at Noon Today:                                        Low: 24     High: 36 Freezing level: 3000’      4500’   Trend and Timing:   Temperatures will rise in the wake of the approaching warm front.  Base area temperature will likely be above freezing through the middle of the week.

24hr Winds Speed (mph)/Direction Starting at Noon Today:   Base: 0-5 SE shifting W Ridge Top:  0-10 S shifting W 10-15,    Trend and Timing: Westerly flow will strengthen tomorrow in the wake of the front.  Expect gusty winds tomorrow afternoon.