Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
334 PM EST Sun Jan 21 2018
Valid 00Z Mon Jan 22 2018 - 00Z Wed Jan 24 2018
...There is a slight risk of severe thunderstorms over parts of Eastern
Texas and the Lower Mississippi Valley...
...Heavy snow possible from the Central Plains to the Upper Mississippi
Valley and over the Cascades...
...Rain/freezing rain possible from the Central Plains into the Upper
Great Lakes and into Northern New England...
...Heavy rain possible over parts of the Pacific Northwest/Northern
California and Northern New England Coast...
A storm over the Central Plains will lift northeastward to the Great Lakes
by Tuesday. The system will produce snow over parts of the Central
Rockies that will end overnight Sunday. Snow will also develop over the
Central Plains, on Sunday evening, that will expand into Upper Mississippi
Valley/Upper Great Lakes by Monday morning continuing into Tuesday
morning. The snow will be heavy at times over the Central Plains
overnight Sunday and over parts of the Upper Mississippi Valley on Monday
into Monday evening. Overnight Monday, the snow will stop over the
Central Plains as the snow moves into the Middle Mississippi Valley and
Western Ohio Valley. On Monday afternoon into evening, snow will develop
over parts of Northern New England continuing into Tuesday.
In addition, rain will develop over parts of the Middle Mississippi Valley
into the Great Lakes on Sunday evening that will expand into the Ohio
Valley/Lower Great Lakes by Monday morning. The rain will expand into
Southern New England by Monday evening and into the Northern Mid-Atlantic
overnight Monday. In the transition zone between the rain and snow,
rain/freezing rain will develop in bands from the Central Plains into the
Great Lakes, on Sunday evening into Monday, and into New England overnight
Monday into Tuesday.
Additionally, showers and thunderstorms will develop over parts of the
Southern Plains into the Lower Mississippi Valley on Sunday evening
advancing to the Tennessee Valley/Central Gulf Coast by Monday morning.
By Monday evening, the showers and thunderstorms will move to parts of the
Ohio Valley southward to the Eastern Gulf Coast and to parts of the
Mid-Atlantic into the Southeast by Tuesday morning.
Meanwhile, upper-level energy will move inland over the Pacific Northwest
moving eastward to the Northern Plains by Tuesday. The system will
produce rain and higher elevation snow over parts of the Pacific
Northwest/Northern California that will move inland to the Northern
Intermountain Region/Northern Rockies by Tuesday morning. The area of
snow will be reduced in areal coverage overnight Monday into Tuesday due
to the lack of moisture. In the wake of the energy, onshore flow will aid
in producing rain and higher elevation snow over parts of the Pacific
Northwest through late Monday night as the low-level flow become parallel
to the coast, likewise, overnight Monday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php