The Weather Prediction Center

Short Range Forecast Discussion

[Abbreviations and acronyms used in this product]
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Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
414 PM EDT Mon Apr 20 2015

Valid 00Z Tue Apr 21 2015 - 00Z Thu Apr 23 2015

...There is a slight risk of severe thunderstorms for parts of the
Mid-Atlantic to the Southeast...

...Heavy rain possible over parts of Maine...

A front extending from the Lower Great Lakes to the Eastern Gulf
Coast will move eastward off the East Coast by Tuesday morning. 
The system will produce showers and thunderstorms from the
Mid-Atlantic to the Southeast that will likewise move eastward off
the coast by Tuesday morning as well.  Rain will develop over
parts of the Northeast that will move into Southeastern Canada by
Tuesday evening.  The boundary will linger over Florida through
Wednesday morning.  Showers and thunderstorms will develop near
the front through Wednesday morning over Florida.  Light snow will
develop over parts of the Upper Great Lakes/Upper Mississippi
Valley through Wednesday.  Rain will develop over parts of the
Great Lakes that will expand into parts of the Ohio Valley/Middle
Mississippi Valley by Tuesday evening.  The rain will move
eastward to the Northern/Central Appalachians to parts of the
Tennessee Valley by Wednesday morning.  

In addition, upper-level energy moving over the Southern tip of
Texas will aid in producing showers and thunderstorms through
Tuesday evening.  Another area of upper-level energy over the
Central Rockies will move eastward to the Southeast by Wednesday. 
Showers and thunderstorms will develop over parts of the Southern
High Plain with snow over parts of the Central Rockies on Monday
evening.  showers and thunderstorms will linger over parts of the
Southern Plains through Wednesday. 

Elsewhere, a front over the Pacific will move onshore over the
Pacific Northwest on Tuesday morning advancing eastward to the
Northern Rockies by Wednesday.  Rain will develop over parts of
the Pacific Northwest Coast by Tuesday evening that will move
inland to parts of the Northern Intermountain Region by Wednesday
morning.  Showers and thunderstorms will develop over parts of
Northern/Central California on Tuesday evening tapering off to
rain by Wednesday. 


Ziegenfelder


Graphics available at www.wpc.ncep.noaa.gov




Last Updated: 414 PM EDT Mon Apr 20 2015