April 12, 2017

MOUNTAIN WEATHER FORECAST

Time and Day:  0800 Wednesday

The Snapshot:   This wet weather with periods of rain and snow will extend into the upcoming weekend.  There is a good chance of some snow accumulation early tomorrow morning.     

The Science:  A complex low-pressure system centered off the PNW coast will produce a mixed bag of snow and rain for the next few days.  A cold front associated with a deep trough could produce a period of heavy snow early tomorrow morning.   Cooler air aloft appears to fill in behind this feature allowing freezing levels to drop below 4000’ tomorrow and Friday.    

The Long Range:  Active weather continues through Saturday.  At the moment, Sunday is trending dry with temperatures returning to seasonal norms.

24hr Precipitation ending at 4am:
Today 24hr water = .5-.75  snow = 3-6
Tomorrow’s 24hr water =.25-.5  snow = 2-4

Trend and Timing:
Rain today shifting to snow tonight.   A burst of heavy snow will be possible between midnight and 7 am tomorrow morning. 


24hr temperature ending at 4 am: 
Low:  26   High: 38
Freezing level: 6000’ – 3000’

Trend and Timing:   
Temperatures will be mostly above freezing through the day.    Freezing levels quickly fall early tomorrow morning and should remain below 4000’ through the day.

 
24hr Winds (mph) ending at 4 am:
Base: 0-5 E shifting W
Ridge Top: 5-10 E shifting W

Trend and Timing:
The current east flow will shift westerly tonight with the passing of the cold front.



jM

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