Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
431 PM EDT Sun Jul 20 2014
Valid 00Z Mon Jul 21 2014 - 00Z Wed Jul 23 2014
...Heat and humidity make a return to the central U.S. early this week...
...Flash flooding and severe thunderstorms possible across the Northern
Plains and Upper Mississippi Valley...
...Wet and stormy conditions will continue over the Southeastern U.S....
Temperatures and dewpoints will be on the rise beneath an upper ridge
building in over the Central U.S. early this week. Heat advisories have
been issued for portions of the Midwest where heat indices could climb
into triple digits. To the north of the expanding ridge...a cold front
will begin to drop south/southeastward through the northern tier of the
Nation. The front will trigger showers and thunderstorms while pressing
through the Northern Plains Monday night and crossing into the Upper
Mississippi Valley on Tuesday. These developing storms will be tapping
into a warm and unstable airmass setting up over the central U.S....giving
them the chance to become organized and potentially pose a threat for
flash flooding and severe weather. Scattered showers and thunderstorms
will be possible with the tail end of the boundary while it settles
southward through the northern Great Basin and Rockies.
Wet and stormy conditions will persist across the Southeast and up into
the Central Appalachians Monday into Tuesday...beneath an elongated upper
trough stretched over the Eastern U.S.. Much of the shower and
thunderstorm activity should be scattered in nature; however...a lingering
frontal boundary...combined with a rich moisture supply...could lead to
organized areas of heavy rains along the Central Gulf Coast...across
Florida...and over portions of Georgia and South Carolina.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php