Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
301 AM EST Tue Jan 22 2019

Valid 12Z Tue Jan 22 2019 - 12Z Thu Jan 24 2019

...A winter storm is expected to impact parts of the central
Plains into the upper Midwest and the Great Lakes through
Wednesday...

...Active weather returns to the Pacific Northwest...

...Very cold conditions across the eastern U.S. will moderate...

A low pressure system continues to consolidate as it exits the
central Rockies into the central Plains this Tuesday morning. 
Parts of the central High Plains has already been impacted by
blizzard or near-blizzard conditions as the storm intensifies. 
This low is forecast to track east-northeast across the central
Plains and into the Great Lakes through Wednesday.  A swath of
snow is expected to the north of the storm track with a foot of
accumulation possible over the Great Lakes.  Some mixed
precipitation can also be expected near the storm track, as well
as parts of interior Northeast on Wednesday.  South of the storm
track, rain is expected to fall ahead of a cold front, especially
over the Southeast later on Wednesday into Thursday morning where
heavy rain along with thunderstorms are possible.

Before the arrival of the aforementioned cold front, very cold air
will dominate much of the Eastern Seaboard.  However, as the cold
high pressure system gives way to the developing low pressure
system coming from the central Plains, temperatures will moderate
to above normal levels on Wednesday under increasing southerly
flow.

Meanwhile, moisture associated with a rather energetic Pacific
cyclone is about to reach the Pacific Northwest.  Rain could
become heavy later today over the coastal sections as well as
across the Olympic peninsula.  The moisture will then continue to
penetrate further inland, reaching the Intermountain region on
Wednesday in the form of snow.  The snow will move into the
northern Rockies Wednesday night and early Thursday just as the
next surge of arctic air from central Canada arrives.
 

Kong


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