Prognostic Meteorological Discussion
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000
FXUS01 KWBC 231957
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
356 PM EDT WED AUG 23 2017

VALID 00Z THU AUG 24 2017 - 00Z SAT AUG 26 2017

...TROPICAL DEPRESSION HARVEY WILL STRENGTHEN INTO A TROPICAL
STORM AND CAUSE HEAVY RAINFALL IN TEXAS BY FRIDAY...

...HEAVY RAINFALL AND THUNDERSTORMS EXPECTED ALONG A COLD FRONT IN
THE SOUTH...

...SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE SOUTHERN
ROCKIES...

THE NATIONAL HURRICANE CENTER HAS NAMED TROPICAL DEPRESSION HARVEY
ONCE AGAIN, WHICH IS EXPECTED TO BECOME TROPICAL STORM HARVEY
SHORTLY. HARVEY WILL MOVE SLOWLY NORTHWESTWARD AND IS CURRENTLY
EXPECTED TO APPROACH THE TEXAS COAST BY LATE FRIDAY. SEE THE
NATIONAL HURRICANE CENTER`S WEBSITE FOR MORE INFORMATION ON
HARVEY`S TRACK. AS HARVEY APPROACHES, HEAVY RAIN WILL BEGIN ON
FRIDAY FOR THE TEXAS COAST, SO THERE IS A SLIGHT RISK OF FLASH
FLOODING BEGINNING ON FRIDAY. STAY TUNED FOR UPDATES, AS HEAVY
RAINFALL AND FLASH FLOODING POTENTIAL IS EXPECTED TO LAST SEVERAL
DAYS.

A COLD FRONT IS TRACKING THROUGH THE WESTERN ATLANTIC, THE
CAROLINAS, AND THE SOUTHEAST, AND INTO THE LOWER MISSISSIPPI
VALLEY AND TEXAS. ALONG THIS FRONT, SCATTERED THUNDERSTORMS ARE
EXPECTED TO CONTINUE. THROUGH WEDNESDAY NIGHT, HEAVY RAIN IS
EXPECTED, PARTICULARLY IN EASTERN NORTH CAROLINA, WHERE THERE IS A
SLIGHT RISK OF FLASH FLOODING. THIS FRONT WILL MOVE SLOWLY
SOUTHWARD BUT LINGER AS A STATIONARY FRONT ALONG THE GULF COAST BY
FRIDAY, SO THUNDERSTORMS WILL CONTINUE FOR THE GULF COAST OVER THE
NEXT FEW DAYS. A WEAK LOW JUST WEST OF FLORIDA WILL ENHANCE THE
SHOWER AND THUNDERSTORM COVERAGE THERE AS WELL, AND THERE IS A
CHANCE OF HEAVY RAIN AND A MARGINAL RISK OF FLASH FLOODING FOR
SOUTHERN FLORIDA THROUGH THE END OF THE WEEK.

FOR THE SOUTHERN ROCKIES AND INTO THE SOUTHERN HIGH PLAINS,
SUFFICIENT MOISTURE AND AN UPPER-LEVEL TROUGH APPROACHING FROM THE
WEST WILL LEAD TO SCATTERED THUNDERSTORMS OVER THE NEXT COUPLE OF
DAYS. THESE STORMS COULD PRODUCE HEAVY RAIN, SO THERE IS A SLIGHT
RISK OF FLASH FLOODING FOR PORTIONS OF THOSE AREAS TONIGHT THROUGH
THURSDAY NIGHT. FARTHER NORTH, FRONTAL SYSTEMS ARE EXPECTED TO
MOVE THROUGH THE ROCKIES AND INTO THE NORTHERN AND CENTRAL HIGH
PLAINS THROUGH THE END OF THE WEEK. THIS WILL HELP CAUSE SCATTERED
SHOWERS AND THUNDERSTORMS FOR MUCH OF THE WESTERN U.S. THROUGH
THURSDAY. AS THE FRONTS PUSH SLOWLY EAST, THE NORTHERN AND CENTRAL
PLAINS WILL START TO SEE SCATTERED THUNDERSTORMS ON THURSDAY AND
INCREASE IN COVERAGE ON FRIDAY.

TATE


GRAPHICS AVAILABLE AT
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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