March 12, 2020

MOUNTAIN WEATHER FORECAST



Stevens Pass Mountain Weather Forecast
Thursday, March 12, 2020, 1000

Current Observations:
24hr Precipitation:        0
Temperature profile:     24 base,  20 ridge
Pass level winds:            light westerly
Barometer:                      1021mb’ and holding
Sky:                                  overcast
Radar:   There are no precipitation echo’s on this morning’s regional radar

The Forecast:  Today will be dry with sun breaks.  Light snow arrives mid-day tomorrow with seasonally cold temperatures.  
   
The Science:  The clouds will begin to increase today in response to the low pressure systems developing off shore.  Unfortunately, these systems will only produce a few inches of snow for Stevens Pass.  The weather topic of the weekend will be the temperatures.  As these systems slide south of the region, they will pull in cold arctic air from the interior north east.  Early morning temperatures could drop into the low teens Saturday and Sunday.  Warmer air filters in early next week with continued dry conditions for the PNW.  

Long Range:  The weekend will be mostly dry with increasing sunshine and temperatures in the teens.

Forecast confidence: Good.

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:
Dry today with light snow developing mid-day tomorrow.


Temperature:
Low: 18  High: 26
Freezing level: 3000’- 1500’

Trend and Timing:   
Freezing levels will peak around 3000’ this afternoon and then fall through the night.

 
Winds
Base: 0-5 west shifting E
Ridge Top: 0-`0 W shifting E

Trend and Timing:
East flow will develop tonight and strengthen tomorrow.


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0800 Thurs March 28th, No ABS