Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
319 PM EST Fri Jan 14 2022

Valid 00Z Sat Jan 15 2022 - 00Z Mon Jan 17 2022

...Snow will dive southward from the northern Plains/Midwest into the
Mid-Mississippi Valley into Saturday as a low pressure system
intensifies...

...Snow and mixed precipitation will overspread the Tennessee Valley and
up the Appalachians Saturday night into Sunday as the low pressure system
tracks up the East Coast...

...Freezing rain/sleet likely along the Piedmont section of Georgia and
the Carolinas Saturday night, spreading up the I-95 corridor on Sunday...

The stage is set for a low pressure system to consolidate and intensify as
it moves across the Deep South into the Southeast during the weekend. 
Arctic air settling into the Plains and the Ohio Valley will interact with
the low pressure system to push an area of moderate to locally heavy snow
down the mid-section of the country through tonight.  As the arctic air
works farther south, rain that initially falls in areas farther south is
forecast to change over to a period of freezing rain and/or sleet before
changing over to snow.  This change over from rain to snow is expected to
impact areas as far south as Arkansas and Tennessee Saturday to Saturday
night.  The rain will then expand across the Deep South as the low
pressure system begins to intensify and track eastward across the region. 
Farther east over the Piedmont section of Georgia and the Carolinas, it
appears that a significant icing event is in store beginning Saturday
night before spreading up the I-95 corridor during the day on Sunday as
the low pressure system tracks up the East Coast.  Meanwhile, arctic air
farther inland will support widespread snow and areas of mixed
precipitation from the Tennessee Valley/upper Ohio Valley to much of the
Appalachians on Sunday.  The combination of snow and ice will likely cause
hazardous driving conditions on roads.  Closer to the coast, rain could
become heavy on Sunday along with gusty winds and a chance of
thunderstorms as the low center is forecast to track through the Southeast.

Meanwhile, a rapidly deepening area of low pressure system well off the
East Coast will drag arctic air from eastern Canada into the Northeast,
bringing frigid conditions, strong gusty winds and dangerous wind chill
temperatures through tonight and into Saturday.  Some light snow will
brush Cape Cod and Downeast Maine into tonight before a high pressure
system pushes the snow out to sea and brings calmer winds into much of the
Northeast by Saturday night.

Elsewhere, an upper-level low off the southern California coast will aid
in producing light rain over parts of southern California on Saturday.

Kong


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