Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
257 PM EST Sat Jan 08 2022

Valid 00Z Sun Jan 09 2022 - 00Z Tue Jan 11 2022

...Rain/freezing rain for parts of the Ohio Valley/Great Lakes and the
Northeast/Mid-Atlantic...

...Heavy lake effect snow for areas downwind from Lake Ontario from Monday
evening to Tuesday...

...There is a Marginal Risk of excessive rainfall over parts of the Lower
Mississippi Valley, Tennessee Valley, and Southern Ohio Valley...

A front extending from the Upper Great Lakes to the Central Plain will
move off the East Coast and the Gulf Coast by Monday.  A plume of moisture
from the Western Gulf of Mexico will stream northward to the Great Lakes.
The system will produce light snow over parts of the Upper Mississippi
Valley/Upper Great Lakes that will move into the Northeast by Sunday
afternoon before ending on Monday morning. Along the rain/snow line, areas
of rain/freezing rain will develop over parts of Ohio Valley/Great Lakes
overnight Saturday. On Sunday morning, the rain/freezing rain will move to
the northern Mid-Atlantic/Northeast ending on Sunday evening. Residents in
the regions mentioned above are urged to double-check road conditions and
the current forecast before traveling, as ice-covered roads require longer
stopping distances.

Meanwhile, south of the rain/snow line, rain and thunderstorms will
develop along and ahead of the cold front over parts of the Middle/Lower
Mississippi Valley, moving into parts of the Ohio/Tennessee Valleys and
the Southeast/southern Mid-Atlantic on Sunday. Therefore, the WPC has
issued a Marginal Risk of excessive rainfall over parts of the Lower
Mississippi Valley, Tennessee Valley, and Southern Ohio Valley through
Sunday morning. The associated heavy rain will create localized areas of
flash flooding, affecting areas that experience rapid runoff with heavy
rain. The Marginal excessive rainfall threat moves into the Tennessee
Valley, Southeast, and parts of the Southern Appalachians on Monday into
Tuesday. In the wake of the cold front, cold air will move over the Upper
Midwest, Great Lakes, and the Northeast. The cold air moving over Lakes
Superior and Huron then over Lake Ontario will produce heavy lake effect
snow for areas downwind from Lake Ontario from Monday evening to Tuesday.

Lastly, as a warm front approaches the Northwest, light rain will develop
over the Pacific Northwest Coast on Monday afternoon into Tuesday morning.

Ziegenfelder

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