Prognostic Meteorological Discussion
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000
FXUS01 KWBC 300751
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
351 AM EDT THU JUL 30 2015

VALID 12Z THU JUL 30 2015 - 12Z SAT AUG 01 2015

...SHOWERS AND THUNDERSTORMS EXPECTED TODAY FOR THE EAST COAST...

...FLASH FLOODING POSSIBLE FOR PORTIONS OF THE SOUTHWESTERN U.S...

...ABOVE AVERAGE TEMPERATURES EXPECTED FOR THE PACIFIC NORTHWEST...


A COLD FRONT WILL SWEEP ACROSS THE EASTERN U.S. TODAY, BRINGING
SHOWERS AND THUNDERSTORMS TO AREAS FROM THE NORTHEAST TO THE
MID-ATLANTIC AND SOUTHEAST. SHOWERS AND THUNDERSTORMS WILL MOVE
OFF THE EAST COAST INTO THE ATLANTIC OCEAN BY EARLY FRIDAY
MORNING. THE SURFACE FRONTAL BOUNDARY WILL MOVE MORE SLOWLY ACROSS
THE SOUTHEASTERN STATES, KEEPING SHOWERS AND THUNDERSTORMS A
POSSIBILITY ACROSS PORTIONS OF THAT REGION INTO SATURDAY. BY
SATURDAY, THE MOST WIDESPREAD SHOWER AND THUNDERSTORMS ACTIVITY
WILL BE ACROSS THE GULF COAST AND ACROSS THE FLORIDA PENINSULA.

THE WESTERN END OF THE SAME FRONTAL BOUNDARY MOVING ACROSS THE
EAST WILL BE NEARLY STATIONARY ACROSS THE SOUTHERN PLAINS OVER THE
NEXT COUPLE DAYS. THIS WILL KEEP THE POSSIBILITY OF SHOWERS AND
THUNDERSTORMS IN PLACE ACROSS PORTIONS OF THE SOUTHERN PLAINS
THROUGH THE NEXT COUPLE DAYS. THE MOST WIDESPREAD SHOWER AND
THUNDERSTORMS ACTIVITY IS EXPECTED ACROSS PORTIONS OF ARIZONA AND
NEW MEXICO, GENERALLY IN AREAS OF HIGHER TERRAIN. CONVECTION WILL
BE ENHANCED DUE TO A COMBINATION OF A LINGERING SURFACE FRONTAL
BOUNDARY, TERRAIN INFLUENCES, AND DEEP TROPICAL MOISTURE FLOWING
INTO THE REGION. HEAVY RAINFALL AND FLASH FLOODING WILL BE A
POSSIBILITY. ADDITIONAL MORE SCATTERED SHOWERS AND THUNDERSTORMS
ARE POSSIBLE ACROSS MUCH OF THE SOUTHWESTERN U.S THROUGH SATURDAY.

HIGH PRESSURE AT THE MID AND UPPER-LEVELS OF THE ATMOSPHERE WILL
KEEP DRY CONDITIONS AND ABOVE AVERAGE TEMPERATURES IN PLACE ACROSS
THE PACIFIC NORTHWEST. AFTERNOON HIGH TEMPERATURES WILL BE AS MUCH
AS 10 TO 15 DEGREES ABOVE AVERAGE AT MANY LOCATIONS, WITH
TEMPERATURES SURPASSING 100 DEGREES IN SOME AREAS.


RYAN

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