Prognostic Meteorological Discussion
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878
FXUS01 KWBC 230702
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
301 AM EDT FRI JUN 23 2017

VALID 12Z FRI JUN 23 2017 - 12Z SUN JUN 25 2017

...TROPICAL DEPRESSION CINDY EXPECTED TO BRING AREAS OF FLASH
FLOODING AND SEVERE WEATHER FROM THE LOWER MISSISSIPPI VALLEY TO
THE MID-ATLANTIC...

...WELL ABOVE AVERAGE TEMPERATURES EXPECTED INTO THE WEEKEND FOR
MUCH OF THE SOUTHWEST AND NORTHWEST...

TROPICAL DEPRESSION CINDY IS CENTERED ACROSS THE LOWER MISSISSIPPI
VALLEY AS OF EARLY THIS MORNING, AND IS EXPECTED TO CONTINUE
MOVING NORTHEASTWARD THROUGH THE NEXT COUPLE DAYS. CINDY IS
FORECAST TO GRADUALLY BECOME POST-TROPICAL BY FRIDAY EVENING AS IT
BEGINS TO MERGE WITH A COLD FRONT CROSSING THE OHIO VALLEY AND
APPALACHIANS. FOR THE LATEST INFORMATION ON TROPICAL DEPRESSION
CINDY, PLEASE REFER TO THE ADVISORIES BEING ISSUED BY THE WEATHER
PREDICTION CENTER. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO BE
WIDESPREAD TODAY FROM THE LOWER MISSISSIPPI VALLEY TO THE
NORTHEAST, AS MOISTURE FROM CINDY IS TRANSPORTED NORTHWARD AHEAD
OF THE FRONTAL BOUNDARY. SEVERE THUNDERSTORMS AND FLASH FLOODING
WILL BOTH CONTINUE TO BE POSSIBLE IN ASSOCIATION WITH THIS SYSTEM
FROM PORTIONS OF THE LOWER MISSISSIPPI VALLEY TO THE MID-ATLANTIC
THROUGH FRIDAY NIGHT. FOR FURTHER DETAILS ON THE SEVERE WEATHER
THREAT PLEASE REFER TO PRODUCTS ISSUED BY THE STORM PREDICTION
CENTER. POST-TROPICAL CYCLONE CINDY IS EXPECTED TO MOVE OFF THE
MID-ATLANTIC COASTLINE ON SATURDAY AND INTO THE WATER OF THE
ATLANTIC OCEAN. FARTHER SOUTH, THE COLD FRONT WILL CONTINUE TO
BRING AREAS OF SHOWERS AND STORMS FROM THE SOUTHEAST TO THE
SOUTHERN PLAINS SATURDAY INTO SUNDAY, WITH LOCALLY HEAVY RAIN
POSSIBLE. BEHIND THE FRONT, COOLER TEMPERATURES ARE FORECAST FOR
MUCH OF THE MIDWEST, WITH SCATTERED SHOWERS AND THUNDERSTORMS
POSSIBLE LATE SATURDAY INTO SUNDAY IN ASSOCIATION WITH A SECONDARY
COLD FRONT.

THE EXTREME HEAT THAT HAS PERSISTED ACROSS THE SOUTHWESTERN U.S.
IN RECENT DAYS WILL VERY SLOWLY BEGIN TO WANE INTO THE WEEKEND.
TEMPERATURES ARE EXPECTED TO REMAIN WELL ABOVE AVERAGE THROUGH
SUNDAY, BUT THE NUMBER OF RECORD HIGHS IN THE SOUTHWEST SHOULD
DECREASE. THE NORTHWEST, ON THE OTHER HAND, WILL SEE RISING
TEMPERATURES AND THE ONSET OF POTENTIALLY DANGEROUS HEAT FOR SOME
AREAS AS HIGH PRESSURE BUILDS IN OVERHEAD. HIGH TEMPERATURES ON
SATURDAY ARE FORECAST TO BE 15 TO 25 DEGREES ABOVE AVERAGE ACROSS
PORTIONS OF THE NORTHWEST, WITH RECORD HIGHS POSSIBLY IN JEOPARDY
FOR SOME AREAS. HEAT ADVISORIES AND EXCESSIVE HEAT WARNINGS HAVE
ALREADY BEEN ISSUED FOR PORTIONS OF THE NORTHWEST.

RYAN


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

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