Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
258 PM EST Mon Jan 22 2018
Valid 00Z Tue Jan 23 2018 - 00Z Thu Jan 25 2018
...Heavy snow and rain over parts of Maine...
...Heavy snow over the Cascades, Shasta, and Northern Rockies...
...Rain/freezing rain possible over parts of Northern New England into
parts of the Upper Great Lakes...
...Heavy rain possible over the Pacific Northwest...
A storm over parts of the Upper/Middle Mississippi Valley will move
northeastward to Southeastern Canada by Wednesday. The system will
produce snow over parts of the Central Plains and Middle/Upper Mississippi
Valley into the Upper Great Lakes and over Northern New England that will
end over the Central Plains early Tuesday morning. The snow will briefly
end over Northern Maine on Tuesday afternoon returning overnight Tuesday
into Wednesday. Also on Tuesday afternoon, snow will start over parts of
the Ohio Valley and the higher elevations of the Central Appalachians as
well as parts of the Northern Mid-Atlantic by Tuesday evening.
Additionally, the snow will wind down over parts of the Upper Great Lakes
by Tuesday evening while changing over to all snow over the Ohio Valley.
Rain will also develop over parts of the Middle Mississippi Valley/Great
Lakes into New England that will continue over parts of the Great
Lakes/Ohio Valley into the Northeast through Tuesday morning. The rain
over the Southern Ohio Valley will change over to snow by Tuesday evening.
The rain will also move off the New England Coast overnight Tuesday. In
the transition zone between the rain and snow, bands of rain/freezing rain
will develop over parts of the Great Lakes into New England that will end
over the Great Lakes by Tuesday afternoon and New England overnight
Tuesday. Furthermore, showers and thunderstorms will develop along and
ahead of the associated front from parts of the Ohio Valley Southward to
the Eastern Gulf Coast by Monday evening that will move eastward to the
Mid-Atlantic southward to the Southeast by Tuesday morning. The showers
and thunderstorms will move off the Eastern Seaboard by Tuesday evening.
Meanwhile, upper-level energy over the Northern Rockies will move eastward
to the Northern/Central Plains by Tuesday evening. The energy will aid in
producing snow over parts of Northern Intermountain Region/Northern
Rockies that will slowly dissipate by Tuesday morning. A deep upper-level
trough over the Northern Pacific will move eastward to the Pacific
Northwest and Northern California Coast by Wednesday morning. A plume of
moisture ahead of the trough will move into parts of the Pacific Northwest
by Tuesday morning and into Northern California Tuesday evening into
Wednesday. The moisture will aid in producing coastal rain and higher
elevation snow over parts of the Pacific Northwest on Tuesday morning that
will move inland to the Northern Intermountain Region by Wednesday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php