Prognostic Meteorological Discussion
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FXUS01 KWBC 190800

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
359 AM EDT Mon Mar 19 2018

Valid 12Z Mon Mar 19 2018 - 12Z Wed Mar 21 2018

...Severe thunderstorms expected from the eastern Tennessee Valley
to parts of the Southeast...

...Heavy snow possible expected for parts of the Northern/Central

...Heavy rain possible over parts of the Southeast...

...Snow for portions of the Northern Plains into parts of the
Upper Mississippi Valley...

A low pressure system will track from the Central Plains eastward
to the Southern Appalachians/southern Mid-Atlantic by Tuesday
before it pushes offshore the Carolina coast, deepens and tracks
northeast. Snow over the Central Plains will slowly move into
parts of the Middle Mississippi Valley by Tuesday. Along and ahead
of the front, where warm moist air transports northward from the
Gulf, will generate showers and thunderstorms across the eastern
Gulf states, eastern Tennessee Valley and parts of the Southeast.
The Storm Prediction Center has highlighted these are areas as
having a slight risk for severe weather, with an enhanced risk
over central Tennessee and northeast Mississippi, northern Alabama
and northwest Georgia. Heavy rain will also be possible from these
storms; therefore a marginal risk for excessive rainfall has been
issued by the Weather Prediction Center. Light snow will also
develop over parts of the Central Appalachians on Tuesday.

Meanwhile, upper-level energy over parts of the Northern High
Plains  will move eastward into parts of the Upper Mississippi
Valley by Tuesday; which will help generate snow over parts of the
Northern Intermountain Region/Northern Rockies into parts of the
Northern Plains and will expand into the Upper Mississippi Valley
into Tuesday morning.  A second area of upper-level energy just
off the Pacific Northwest Coast will slowly begin to move inland
overnight Monday into Tuesday morning. Onshore flow will this
system will result in
coastal rain and higher elevations snow over the Pacific Northwest
through Tuesday.  By Tuesday night rain will begin over portions
of California. This upcoming event could lead to increased
flooding concerns.


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