Prognostic Meteorological Discussion
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FXUS01 KWBC 250811

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
410 AM EDT Wed Apr 25 2018

Valid 12Z Wed Apr 25 2018 - 12Z Fri Apr 27 2018

...Heavy rain possible over the Maine Coast...

...Temperatures will be 10 to 20 degrees below average over parts
of the Central/Southern Plains...

A storm over the Mid-Atlantic will move northeastward the northern
tip of Maine by Thursday evening.  The system will produce showers
and thunderstorms along the Mid-Atlantic Coast that will move
northward to Southern New England Coast by Thursday morning then
end.  The system will also produce rain over parts of the Great
Lakes into the Northeast and parts of the Central/Southern
Appalachians into parts of the Mid-Atlantic on Wednesday morning.
The rain ends over the Upper Great Lakes by Wednesday evening and
over most of the Mid-Atlantic and the Central/Southern
Appalachians overnight Wednesday. On Thursday, the rain will
slowly end over Southern New England and slowly tapper off over
Northern New England overnight Thursday.

Meanwhile, upper-level energy over the Central Plains will move
southeastward to the Southeast/Tennessee Valley by Thursday
evening.  The system will produce rain over parts of the
Central/Southern Plains that will, likewise, move southeastward to
the Southeast and Southern Ohio/Tennessee Valleys by Thursday
evening.  Showers and thunderstorms will develop along and near
the associated front over parts of the Southern Plains/Lower Rio
Grande Valley moving to the Central Gulf Coast by Thursday morning
and into parts of the Southeast by Thursday evening.

Elsewhere, a front moving southeastward out of Western Canada will
move to the Upper Great Lakes southwestward to the Southern High
Plains by Thursday evening.  The system will produce rain over
parts of the Northern High Plains by Wednesday evening that will
move into the Upper Mississippi Valley/Northern Plains by Thursday
morning.  The rain will be limited to parts of the Upper Great
Lakes by Thursday evening and pockets of rain over parts of the
Central/Southern Plains.


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