369
FXUS01 KWBC 200811
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT WED MAY 20 2026
VALID 12Z WED MAY 20 2026 - 12Z FRI MAY 22 2026
...SEVERE WEATHER AND FLASH FLOODING THREATS ACROSS PORTIONS OF
THE SOUTHERN PLAINS INTO THE ARKLATEX THROUGH THE NEXT COUPLE OF
DAYS...
...ONE MORE DAY OF RECORD HEAT ALONG THE EAST COAST BEFORE COOLER
AIR ARRIVES...
...BELOW NORMAL TEMPERATURES TO OVERSPREAD THE SOUTHERN PLAINS,
MIDWEST AND GRADUALLY THE NORTHEAST U.S. OVER THE NEXT COUPLE OF
DAYS...
A DEEP LOW PRESSURE SYSTEM PASSING NORTH OF NEW ENGLAND WILL
ADVANCE A COLD FRONT EASTWARD INTO THE EAST COAST THROUGH THE NEXT
COUPLE OF DAYS. MEANWHILE, THE TRAILING END OF THE FRONT WILL
BECOME NEARLY STATIONARY ACROSS TEXAS. THE SLOW MOTION OF THE
FRONT WHILE INTERACTING WITH MOISTURE FROM THE GULF WITH
ADDITIONAL EJECTION OF UPPER-LEVEL TROUGHS FROM THE SOUTHERN
ROCKIES WILL BRING A COUPLE OF DAYS OF UNSETTLED WEATHER FOR THE
SOUTHERN PLAINS. WESTERN TEXAS WILL LIKELY SEE STRONG TO SEVERE
THUNDERSTORMS TODAY INTO TONIGHT BEFORE THE STRONG THUNDERSTORM
AND HEAVY RAIN THREATS BROADEN AND SHIFT SLIGHTLY TOWARD THE EAST
ON THURSDAY FROM CENTRAL TEXAS THROUGH THE ARKLATEX REGION INTO
THE MID-MISSISSIPPI VALLEY. THIS IS IN RESPONSE TO THE UPPER
TROUGH EXITING THE SOUTHERN ROCKIES AND MOVING INTO THE SOUTHERN
PLAINS. BY FRIDAY MORNING, THE SYSTEM WILL BEGIN TO LIFT
NORTHEASTWARD WITH SHOWERS AND SOME STRONG THUNDERSTORMS ARCING
ACROSS THE EAST-CENTRAL U.S. AND SOUTH ACROSS THE LOWER
MISSISSIPPI VALLEY AND ARKLATEX.
MEANWHILE, ANOTHER UPPER TROUGH FROM WESTERN CANADA WILL DIP INTO
THE NORTHERN ROCKIES, BRINGING A BROADENING AREA OF RAIN AND
HIGH-ELEVATION SNOW ACROSS NORTHERN ROCKIES INTO THE NORTHERN HIGH
PLAINS BEGINNING LATER TODAY THROUGH THURSDAY. FROM THURSDAY
NIGHT TO FRIDAY MORNING, THIS UPPER TROUGH WILL INTERACT WITH THE
SOUTHERN PLAINS UPPER TROUGH TO BRING A PERIOD OF RAIN FROM THE
NORTHERN PLAINS DOWN INTO THE CENTRAL HIGH PLAINS WITH WET SNOW
ALONG THE FRONT RANGE OF COLORADO.
ALONG THE EAST COAST, ANOTHER DAY OF RECORD HEAT IS EXPECTED FROM
THE MID-ATLANTIC TO NEW ENGLAND BEFORE THE ARRIVAL OF THE COLD
FRONT. THE RECENT SPELL OF HEAT WILL BE REPLACED BY WET AND COOL
WEATHER ON THURSDAY FOR THE NORTHERN MID-ATLANTIC BUT THE
SOUTHEAST INCLUDING FLORIDA WILL REMAIN HOT AND HUMID AS THE FRONT
STALLS ACROSS NORTH CAROLINA. A COOL HIGH PRESSURE SYSTEM WILL
KEEP TEMPERATURES BELOW NORMAL ACROSS THE NORTHERN TIER STATES TO
THE CENTRAL PLAINS. RAINFALL OVERSPREADING THE OHIO VALLEY,
MID-ATLANTIC AND AREAS OF NEW ENGLAND SHOULD LARGELY BE BENEFICIAL
AS MANY OF THESE AREAS ARE DEALING WITH AN ONGOING DROUGHT. THE
WEST COAST WILL REMAIN DRY WITH HIGHS REACHING INTO THE UPPER 90S
IN THE CENTRAL VALLEY OF CALIFORNIA BY THURSDAY AFTERNOON.
KONG
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