Fall-Like Arctic Front to Grip much of North America: Snow Forecast for Montana, Wyoming, Utah and Colorado
August 18, 2021 Cap Allon
An unusually cold storm system will move into the Pacific Northwest this week, driving temperatures down some 6C-16C below the seasonal average, and bringing a substantial dusting of summer snow to the mountains.
The latest GFS runs (below) show a mass of Arctic air sinking down from Alaska and Canada, starting today.
Aug 18:
GFS 2m Temperature Anomalies (C) Aug 18 [tropicaltidbits.com].
That mass of “blue” and “purple” will intensify and expand southward and eastward into Thursday:
https://electroverse.net/fall-like-arctic-front-to-grip-much-of-north-america/
