Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
257 AM EST Sat Feb 19 2022

Valid 12Z Sat Feb 19 2022 - 12Z Mon Feb 21 2022

...Strong winds and snow squalls over parts of the Northeast on Saturday...

...Heavy snow for the Cascades Saturday into Monday...

...Temperatures will be 10 to 20 degrees below average over the Northern
Tier States by Monday morning...

A front extending from the Lower Great Lakes/Northeast southwestward to
the Middle Mississippi Valley will move eastward off the East Coast by
Saturday evening. The system will produce light to moderate snow to the
Northeast and light snow over the Central Appalachians. The powerful
Arctic cold front will race across the Northeast Saturday, exiting the New
England Coast Saturday evening. Along and behind the front, narrow bands
of snow squalls will move rapidly from northwest to southeast. These bands
will be accompanied by heavy snowfall rates of 1"/hr or more, gusty winds
which may exceed 50 mph and extremely limited visibility. The brief heavy
snow and wind combination will likely create dangerous travel conditions
as the front moves through. Temperatures will drop quickly behind the
front leading to a rapid refreeze of wet roadways. In addition, lake
effect snow will develop downwind from Lakes Superior and Michigan, ending
by Saturday late afternoon.

Meanwhile, a fast-moving area of low pressure over Western Canada will
move into the Northern Plains overnight Saturday. The system will move
into the Upper Great Lakes by Sunday morning, moving northeastward into
Eastern Canada by Monday. As a result, light snow will develop along the
U. S./Canadian border from the Northern Rockies to the Upper Great Lakes
early Sunday morning to Sunday afternoon. Very cold high pressure will
build in over the Rockies to the Great Lakes. The associated upslope flow
will aid in producing moderate snow over the Northern Rockies from Sunday
afternoon into Monday morning. The cold high pressure will bring
Temperatures 10 to 20 degrees below average over the Northern Tier States
by Monday morning.

Additionally, a weak front will move into the Pacific Northwest on
Saturday evening into Sunday morning. The system will produce coastal rain
and higher elevation snow from late Saturday afternoon into Sunday.
Onshore flow will keep the coastal rain and higher elevation snow
continuing into Monday. The heavy snow will be a multiple-day event for
the Cascades.

Ziegenfelder

Graphics are available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php