Prognostic Meteorological Discussion
Issued by NWS

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FXUS01 KWBC 230640
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
239 AM EDT SUN JUL 23 2017

VALID 12Z SUN JUL 23 2017 - 12Z TUE JUL 25 2017

...FLASH FLOODING AND SEVERE WEATHER WILL BE POSSIBLE OVER
PORTIONS OF MID-ATLANTIC STATES THIS WEEKEND...

...DANGEROUS HEAT IS EXPECTED TO CONTINUE FOR THE CENTRAL PLAINS
AND MIDDLE MISSISSIPPI VALLEY TO THE MID-ATLANTIC COAST THROUGH
THE WEEKEND...

...LOCALIZED FLOODING POSSIBLE ACROSS THE SOUTHWEST AND SOUTHERN
AND CENTRAL ROCKIES OVER THE NEXT FEW DAYS...


A FRONTAL BOUNDARY WILL SLOWLY PUSH ACROSS THE MID ATLANTIC AND
OHIO VALLEY, BECOMING A FOCUS FOR SHOWERS AND THUNDERSTORMS. A HOT
AND HUMID AIR MASS IN PLACE ACROSS MUCH OF THE REGION WILL SUPPORT
STRONG TO SEVERE THUNDERSTORMS AND LOCALIZED HEAVY RAINFALL ON
SUNDAY. PARTS OF THE CENTRAL APPALACHIANS COULD SEE SOME FLASH
FLOODING AS THE STORMS MOVE OVER ALREADY SATURATED SOILS. THE
FRONT WILL LINGER ACROSS THE MID ATLANTIC FOR MONDAY WITH SHOWERS
AND THUNDERSTORMS SPREADING INTO THE NORTHEAST BUT NO SEVERE
WEATHER OR FLASH FLOODING IS EXPECTED AT THIS TIME. FURTHER WEST,
THE FRONT WILL SAG SOUTHWARD ACROSS THE SOUTHERN PLAINS AND
TENNESSEE VALLEY WITH SHOWERS AND THUNDERSTORMS EXPECTED ACROSS
MUCH OF THE SOUTHEAST.

DANGEROUS HEAT WILL CONTINUE ACROSS PARTS OF THE CENTRAL U.S. AND
SOUTHERN MID ATLANTIC ON SUNDAY. HIGH TEMPERATURES WILL REACH INTO
THE MID AND UPPER 90S TO NEAR 100 DEGREES ACROSS PARTS OF THE
SOUTHERN PLAINS, MID MISSISSIPPI VALLEY, AND INTO THE SOUTHERN MID
ATLANTIC. THOSE TEMPERATURES COMBINED WITH VERY HIGH DEWPOINTS
WILL LEAD TO HEAT INDEX VALUES OF 100 TO 115 ACROSS MUCH OF THE
REGION. AT LEAST SOME RELIEF SHOULD ARRIVE ON MONDAY AS THE FRONT
NEARS WITH SHOWERS AND THUNDERSTORMS EXPECTED.

MONSOONAL MOISTURE ALONG WITH DAYTIME HEATING WILL TRIGGER
THUNDERSTORMS ACROSS THE SOUTHWEST AND THE SOUTHERN HALF OF THE
ROCKIES ON SUNDAY.  HEAVY DOWNPOURS ASSOCIATED WITH THESE
THUNDERSTORMS COULD LEAD TO LOCALIZED FLASH FLOODING. THE FLASH
FLOOD THREAT WILL BE A BIT MORE FOCUSED ACROSS ARIZONA FOR MONDAY.


KREKELER


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





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