Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
353 AM EDT Tue Jul 23 2019

Valid Tue Jul 23 2019 - Thu Jul 25 2019

...There is a slight risk of severe thunderstorms over parts of the
Southern Mid-Atlantic...

...There is a slight risk of excessive rainfall over parts of the Central
Gulf Coast, Southeast, and Southern Mid-Atlantic...

A strong cold front will move off most of the East Coast and the Gulf
Coast bringing to an end the recent heat wave in the East and Mid West. 
Showers and thunderstorms will develop along the boundary from the
Southern Mid-Atlantic to the Central Gulf Coast and into parts of the
Western Gulf Coast.  Rain will develop along the northern portion of the
front from the Southern mid-Atlantic northward to parts of New England
that will move off the coast by Tuesday evening.  Heavy rain associated
with showers and thunderstorms will lead to areas of flash flooding
(excessive rainfall) over parts of the Southern Mid-Atlantic to parts of
the Central Gulf Coast.  Temperatures and the humidity will drop in its
wake with a much cooler/drier air mass for Tuesday--most areas will see
below normal readings for late July in the 70s and lower 80s behind the
front.  Showers and thunderstorms will linger over parts of Northern
Florida into the Florida Peninsula through Thursday morning. 
Additionally, in the wake of the front and associated upper-level trough,
instability showers will develop due to daytime heating and cool air aloft
over parts of the Great Lakes and the Upper Mississippi Valley on Tuesday
and Wednesday with parts of the Lower Great Lakes and Ohio Valley added on

Monsoonal moisture will move into parts of the Southwest/Great Basin and
the Southern/Central Rockies on Tuesday and Wednesday.  With the aid of
daytime heating, showers and thunderstorms will develop over the region
with maximum areal coverage during the late afternoon into the late
evening on Tuesday and Wednesday.  In addition, upper-level energy will
move into the Pacific Northwest that will produce showers and
thunderstorms over parts of the Northern Intermountain Region and Northern
Rockies and rain over parts of the Northwest on Tuesday, ending by
Wednesday evening.  The energy will aid in developing a front over parts
of the Northern Rockies overnight Tuesday into Wednesday morning.  By
Wednesday evening, showers and thunderstorms will develop over parts of
the Northern/Central High Plains moving into parts of the Northern Plains
by Thursday morning.   


Graphics available at:
NWS Weather Prediction Center Storm Prediction Center
United States 2 Day Forecast