Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
306 AM EST Sun Jan 23 2022

Valid 12Z Sun Jan 23 2022 - 12Z Tue Jan 25 2022

...Periods of light to moderate snow across the northern tier states...

...Low pressure system to bring rain showers and thunderstorms to the Gulf
Coast beginning Monday...

...Moderating temperatures across much of the southern and eastern U.S.
but mild afternoons over the northern/central Plains will be followed by
arctic air intrusion Monday into Tuesday....

An arctic air mass that has settled across the southern and eastern U.S.
will bring another day of colder than normal temperatures before a
moderating trend sets in on Monday.  Meanwhile, a series of shortwaves
diving across western Canada will round a broad trough stationed over
eastern Canada.  This pattern will result in a couple of fast-moving low
pressure waves to track across the northern tier states during the next
couple of days, bringing periods of snow through the region followed by
intrusion of arctic air from Canada.  The first clipper will bring a swath
of 3-6 inches of snow today just south of Lake Erie with light amounts
farther east.  The second clipper will deliver a quick round of mainly
light snow across the northern Plains to the upper Midwest and into the
Great Lakes on Monday, before reaching New England by Tuesday morning. 
Lake effect enhancement should result in somewhat higher amounts downwind
of the lake waters from both systems.

Meanwhile, a closed upper-level low is currently bringing areas of light
precipitation over Arizona into New Mexico.  This system is forecast to
track eastward toward southern Texas the next couple of days and will
trigger the formation of a surface low system just off the Texas coast
Monday night.  This system will then tap into Gulf moisture and trigger a
round of showers and some thunderstorms along western to central Gulf
coast late Monday into Tuesday morning.  The heaviest rainfall is forecast
to stay just off the coast.

Elsewhere, the northern/central Plains will warm up considerably today as
the second clipper system tracks into the northern Plains by tonight.  The
arctic front in the wake of the second clipper will plunge into the Plains
with much colder temperatures surging south Monday night together with a
round of snow spreading from northern to central Rockies as well as the
nearby High Plains.

Kong


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