112
FXUS01 KWBC 291945
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
345 PM EDT THU AUG 29 2024
VALID 00Z FRI AUG 30 2024 - 00Z SUN SEP 01 2024
...RECORD HEAT CONTINUES ACROSS THE OHIO VALLEY INTO THE SOUTHERN
APPALACHIANS THROUGH FRIDAY, WITH RELIEF ON TAP FOR THE WEEKEND...
...MUCH ABOVE AVERAGE TEMPERATURES BUILD ACROSS THE PACIFIC
NORTHWEST, NORTHERN GREAT BASIN AND INTO THE NORTHERN ROCKIES...
...ACTIVE THUNDERSTORMS EXPECTED ALONG AND AHEAD OF A STRONG FRONT
PUSHING FROM THE UPPER TO MID MISSISSIPPI VALLEY INTO THE OHIO
VALLEY AND ACROSS THE CENTRAL TO SOUTHERN PLAINS, PRODUCING HEAVY
RAINS, FLOODING AND SEVERE WEATHER...
...HEAVY RAINS AND ISOLATED FLOODING POSSIBLE ALONG THE LOUISIANA
AND UPPER TEXAS COASTS...
THE RECENT PERIOD OF MUCH ABOVE AVERAGE /RECORD HIGH TEMPERATURES
FROM THE OHIO VALLEY INTO THE SOUTHERN APPALACHIANS WILL BE
CONTINUING THROUGH FRIDAY. HIGH TEMPERATURES ARE EXPECTED TO BE
10 TO 15 DEGREES ABOVE AVERAGE THROUGH FRIDAY, SUPPORTING THE
POTENTIAL FOR ADDITIONAL RECORD HIGH TEMPERATURES THURSDAY AND
FRIDAY FROM SOUTHERN OHIO INTO SOUTHERN INDIANA, MUCH OF KENTUCKY,
EASTERN TO CENTRAL TENNESSEE AND FAR WESTERN NORTH CAROLINA. THE
COMBINATION OF THE HOT TEMPERATURES AND HIGH HUMIDITY LEVELS WILL
PRODUCE MAJOR HEAT RISKS WITH MAXIMUM HEAT INDICES IN THE 100 TO
110 DEGREE RANGE. THE CURRENT RECORD HIGH TEMPERATURE STREAK,
WILL HOWEVER, BE COMING TO AN END ON SATURDAY WHEN COOLER
TEMPERATURES ARE EXPECTED AS CLOUD COVER AND PRECIPITATION MOVE IN
AHEAD OF A STRONG COLD FRONT.
MUCH ABOVE AVERAGE TEMPERATURES WILL ALSO BE BUILDING ACROSS THE
PACIFIC NORTHWEST, NORTHERN GREAT BASIN INTO THE NORTHERN ROCKIES
FRIDAY AND SATURDAY AS A MID TO UPPER LEVEL RIDGE STRENGTHENS
ACROSS THIS REGION. THESE HOT TEMPS WILL LIKELY CONTINUE INTO
SUNDAY BEFORE COOLING BEGINS EARLY NEXT WEEK. AT THE MOMENT,
HOWEVER, IT DOES NOT APPEAR THAT THESE MUCH ABOVE AVERAGE
TEMPERATURES WILL PRODUCE ANY RECORD HIGHS.
THE STRONG FRONT BRINGING RELIEF TO RECORD HIGH TEMPS OVER THE
OHIO VALLEY INTO THE SOUTHERN APPALACHIANS WILL FIRST BE PUSHING
SOUTHEASTWARD OVER THE NEXT TWO DAYS FROM THE UPPER MISSISSIPPI
VALLEY INTO THE GREAT LAKES AND SOUTHWARD INTO PORTIONS OF THE
CENTRAL TO SOUTHERN PLAINS. ACTIVE THUNDERSTORMS WITH HEAVY
RAINS, LOCALIZED FLOODING AND SEVERE WEATHER ARE POSSIBLE LATE
THURSDAY AFTERNOON INTO THURSDAY NIGHT/EARLY FRIDAY MORNING ACROSS
THE UPPER TO MID MISSISSIPPI VALLEY INTO PORTIONS OF THE CENTRAL
TO SOUTHERN PLAINS ALONG AND AHEAD OF THIS STRONG FRONT. THESE
ACTIVE THUNDERSTORMS ARE THEN EXPECTED TO FLARE AGAIN FRIDAY INTO
EARLY SATURDAY ACROSS THE LOWER GREAT LAKES INTO THE OHIO VALLEY
WITH ADDITIONAL POTENTIAL FOR HEAVY RAINS, LOCALIZED FLASH
FLOODING AND SEVERE WEATHER. HEAVY RAINS AND LOCALIZED FLOODING
ALSO POSSIBLE ACROSS PORTIONS OF THE CENTRAL APPALACHIANS INTO THE
MID ATLANTIC THURSDAY AFTERNOON INTO THURSDAY NIGHT ALONG A
STATIONARY FRONT ACROSS THIS REGION AND THEN AGAIN LATE SATURDAY
AFTERNOON INTO SATURDAY NIGHT AHEAD OF THE ABOVE MENTIONED STRONG
FRONT MOVING SOUTHEASTWARD FROM THE LOWER LAKES/OHIO VALLEY REGION.
AN AREA OF MUCH ABOVE AVERAGE MOISTURE VALUES IS EXPECTED TO
REMAIN NEARLY STATIONARY OVER THE NEXT FEW DAYS ACROSS THE WESTERN
TO CENTRAL GULF OF MEXICO. A WEAK MID TO UPPER LEVEL DISTURBANCE
EMBEDDED IN THIS HIGH MOISTURE AXIS WILL LIKELY PRODUCE HEAVY
RAINFALL AMOUNTS ALONG THE LOUISIANA COAST, WESTWARD TO THE UPPER
TEXAS COAST. RAINFALL TOTALS OF 3-5" POSSIBLE OVER THE NEXT FEW
DAYS, WITH ADDITIONAL HEAVY RAINS INTO THE END OF THE WEEKEND AND
EARLY NEXT WEEK ALSO POSSIBLE AS THE WEAK MID TO UPPER LEVEL
DISTURBANCE AND AXIS OF MUCH ABOVE AVERAGE MOISTURE ARE NOT
EXPECTED TO MOVE APPRECIABLY.
ORAVEC
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