Prognostic Meteorological Discussion
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000
FXUS01 KWBC 231902
PMDSPD

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

VALID 00Z SAT JUN 24 2017 - 00Z MON JUN 26 2017

...TROPICAL DEPRESSION CINDY WILL CONTINUE TO WEAKEN BUT STILL
BRING FLASH FLOODING AND SEVERE WEATHER FROM THE LOWER MISSISSIPPI
VALLEY TO THE MID-ATLANTIC...

...WELL ABOVE AVERAGE TEMPERATURES EXPECTED ACROSS THE WEST COAST
DURING THE WEEKEND...

TROPICAL DEPRESSION CINDY WILL WEAKEN TO A POST-TROPICAL CYCLONE
BY THIS AFTERNOON AS IT MOVES NORTHEASTWARD FROM THE LOWER
MISSISSIPPI VALLEY AND INTO THE TENNESSEE VALLEY.  MEANWHILE, A
COLD FRONT EXTENDED FROM THE GREAT LAKES TO THE SOUTHERN PLAINS
WILL MOVE SOUTHWARD ACROSS THE OHIO/TENNESSEE VALLEYS AND LOWER
MISSISSIPPI VALLEY.  MOISTURE ASSOCIATED WITH CINDY COMBINING WITH
THIS FRONTAL BOUNDARY WILL GIVE WAY TO HEAVY RAINFALL PARTICULARLY
FROM NORTHERN TENNESSEE, KENTUCKY AND WILL MOVE INTO THE CENTRAL
APPALACHIANS THIS EVENING.  HEAVY RAINFALL WILL ALSO TRAIL BEHIND
THE CENTER OF CINDY WHICH WILL IMPACT THE SOUTHEAST. BY TONIGHT,
THE AXIS OF HEAVY RAINFALL WILL BE ALONG AND AHEAD OF THE FRONT IN
WEST VIRGINIA AND EASTERN KENTUCKY. OVERALL, A MODERATE RISK FOR
EXCESSIVE RAINFALL IS POSSIBLE FROM THE LOWER MISSISSIPPI VALLEY
TO THE CENTRAL APPALACHIANS THROUGH TOMORROW MORNING. SEVERE
WEATHER WILL ALSO BE A THREAT FROM THE SOUTHEAST TO THE
MID-ATLANTIC THROUGH FRIDAY MORNING.  SEE THE STORM PREDICTION
CENTER FOR MORE INFORMATION.

BY FRIDAY, THE COLD FRONT WILL MOVE OVER THE
NORTHEAST/MID-ATLANTIC WHILE CONTINUING ITS SOUTHWARD TREK ACROSS
THE SOUTHEAST AND TEXAS.  SHOWERS AND THUNDERSTORMS ARE EXPECTED
ALONG AND AHEAD OF THE COLD FRONT FROM THE SOUTHEAST TO SOUTHEAST
TEXAS. GIVEN THE NATURE OF THESE SHOWERS AND THUNDERSTORMS, SOME
OF THEM HAVE THE CAPABILITY TO PRODUCE LOCALLY HEAVY RAINFALL.
THUS, THERE IS A SLIGHT RISK OF FLASH FLOODING FROM THE CAROLINAS
TO EAST TEXAS WITH A MARGINAL RISK OF SEVERE WEATHER FOR THE
EASTERN CAROLINAS/GEORGIA.

THE EXTREME HEAT THAT HAS PLAGUED THE DESERT SOUTHWEST THIS WEEK
WILL CONTINUE INTO THE WEEKEND.  HIGH TEMPERATURES WILL CONTINUE
TO BE OVER 110 DEGREES ACROSS THE SOUTHWEST.  MANY OF THE
EXCESSIVE HEAT WARNINGS WILL BE EFFECTIVE THROUGH THE END OF THE
WEEKEND AND SOME AREAS COULD SEE EXCESSIVE HEAT INTO MONDAY.
MEANWHILE, THE NORTHWEST WILL ALSO SEE POTENTIALLY RECORD BREAKING
TEMPERATURES AS HIGH PRESSURE BUILDS ACROSS THE REGION.  HIGH
TEMPERATURES ON SATURDAY AND SUNDAY WILL BE 15 TO 25 DEGREES ABOVE
AVERAGE ACROSS THE NORTHWEST--AND EXCESSIVE HEAT WARNINGS IN
ADDITION TO HEAT ADVISORIES ARE IN EFFECT FROM EASTERN WASHINGTON
SOUTHWARD ALONG THE ENTIRE WEST COAST.

REINHART




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