January 12, 2017

MOUNTAIN WEATHER FORECAST

Time and Day: 0630 Thursday

The Snapshot:  Dry, but warmer conditions will prevail through Saturday with light snow on Sunday.  

The Science:  High pressure over the inland NW will dominate the weather pattern into the weekend.  This morning’s low temperatures should be the lowest of the week with freezing levels notching up over the next 24hrs.  The flow turns westerly tomorrow as the high pressure slowly weakens and drifts east.   Most of the approaching moisture will remain north of Stevens Pass through early Sunday morning. 

The Long Range: This cold weather pattern that we have enjoyed for the last few weeks will come to an end this weekend.  A warm moist air mass being pushed by a SW jet stream will begin to affect the region over the weekend.

The possibility of rain will be in the discussion for Monday as a strong warm front with freezing levels rising above 4500’ takes shape.  It’s a bit early to have confidence in the timing and details, so stay tuned as things develop.  In the meantime, enjoy the beautiful clear weather.  Did you see the moonlight last night? Amazing.    


Precipitation Ending at 4am:

Today 24hr water =  0 Snow = 0

Tomorrow’s 24hr water =  0 snow = 0

Trend and Timing:
Dry through early Sunday morning.


24hr temperature ending at 4 am tomorrow: 
Low:  14   High: 20
Freezing level: 500’- 1500’

Trend and Timing:   
Surface temperatures will remain in the teens through the night with freezing levels rising tomorrow.

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

Trend and Timing:
 East flow will shift westerly overnight. 




jM

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