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221
FXUS01 KWBC 250845
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
444 AM EDT FRI JUL 25 2014

VALID 12Z FRI JUL 25 2014 - 12Z SUN JUL 27 2014

...A SURGE IN HEAT AND HUMIDITY EXPECTED FOR THE MIDDLE
MISSISSIPPI AND OHIO VALLEYS...

...FLASH FLOODING AND SEVERE WEATHER POSSIBLE ACROSS PORTIONS OF
THE MIDWEST ON SATURDAY...


HEAT AND HUMIDITY WILL MAKE A RETURN TO THE MIDDLE MISSISSIPPI AND
OHIO VALLEYS LATE THIS WEEK AS A FRONTAL BOUNDARY STRETCHED FROM
THE CENTRAL PLAINS TO THE LOWER MISSISSIPPI VALLEY BEGINS TO SURGE
NORTHEASTWARD AS A WARM FRONT.  MEANWHILE...SHOWERS AND
THUNDERSTORMS WILL CONTINUE TO IGNITE AHEAD OF A SEASONABLY STRONG
COLD FRONT PUSHING THROUGH THE NORTH CENTRAL U.S. ON FRIDAY.
THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY DOWNPOURS AND
SEVERE WEATHER...ESPECIALLY AS THEY PROPAGATE SOUTHEASTWARD INTO A
MOIST AND UNSTABLE AIRMASS SETTING UP ACROSS THE MIDWEST ON
SATURDAY.

A PLUME OF MOISTURE STREAMING OFF THE EASTERN PACIFIC WILL FUEL
ADDITIONAL DAYS OF SCATTERED AFTERNOON CONVECTION ACROSS THE
SOUTHWEST AND CENTRAL ROCKIES FRIDAY AND SATURDAY.  ELSEWHERE IN
THE WEST...TEMPERATURES WILL BE ON THE RISE OVER THE NORTHERN
ROCKIES AND INTERMOUNTAIN WEST THIS WEEKEND AS AN UPPER RIDGE
SPRAWLED ACROSS THE SOUTH CENTRAL U.S. BUILDS NORTHWARD INTO THE
REGION.

PLEASANT CONDITIONS WILL PREVAIL IN THE WAKE OF A COLD FRONT
PUSHED WELL OFF THE NEW ENGLAND AND NORTHERN MID-ATLANTIC COASTS
ON FRIDAY.  HOWEVER...THE TAIL END OF THE BOUNDARY WILL LINGER
OVER THE SOUTHEAST AND GULF COAST STATES...HELPING TO FOSTER
SHOWER AND THUNDERSTORM ACTIVITY FRIDAY AND SATURDAY.


GERHARDT


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
$$






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