Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
231 PM EST Sat Jan 18 2020

Valid 00Z Sun Jan 19 2020 - 00Z Tue Jan 21 2020

...Winter storm to persist another day followed by very cold weather from
the Plains to the East Coast...

The ongoing winter storm across the Great Lakes and the Eastern U.S. is
expected to persist through Sunday across New England as a second low
develops near the coast Saturday night.  A broken band of showers and a
few thunderstorms are expected from the central Gulf Coast to the
Carolinas ahead of the cold front, and a cold rain across much of the
Mid-Atlantic region and some freezing rain across portions of Maryland,
West Virginia, and Pennsylvania.  Farther to the north across the Great
Lakes and much of New York and northern New England, the depth of cold air
will be sufficient to support mainly snow, including some lake enhanced
snow.  Snowfall totals on the order of 6 to 12 inches are likely from
northern New York to central Maine.  The blizzard conditions across the
Dakotas and Minnesota are expected to abate overnight as high pressure
continues building southward across that region.

An arctic airmass will be settling southward in the wake of the winter
storm across much of the central and northern Plains, with temperatures as
much as 20 degrees below average for Sunday and into Monday.  Although
this airmass will modify some before reaching the East Coast to begin the
work week, readings will still be below average by 5 to 15 degrees in most
cases. 

Dry conditions can be expected from California to the Ohio Valley over the
next couple of days with no significant storm system expected after the
current storm departs the East Coast, other than onshore flow and showers
for western Washington and Oregon.

Hamrick

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