676
FXUS01 KWBC 272000
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
359 PM EDT WED MAY 27 2026
VALID 00Z THU MAY 28 2026 - 00Z SAT MAY 30 2026
...ROUNDS OF HEAVY RAIN AND THUNDERSTORMS CONTINUE FOR MUCH OF THE
SOUTHERN U.S. THROUGH LATE WEEK...
...UNSETTLED WEATHER LINGERS ACROSS PARTS OF THE WEST AS A
SLOW-MOVING PACIFIC LOW SPINS OVER CALIFORNIA AND THE GREAT
BASIN...
...SUMMERLIKE HEAT PERSISTS FOR THE NORTHERN ROCKIES/PLAINS AND
UPPER MIDWEST WITH WIDESPREAD HIGH TEMPERATURES WELL INTO THE 80S
AND 90S...
VERY MOIST GULF AIR SOUTH OF A MEANDERING FRONTAL BOUNDARY ACROSS
THE SOUTHERN U.S. WILL CONTINUE TO LEAD TO WIDESPREAD SHOWERS AND
THUNDERSTORMS THE NEXT FEW DAYS IN AN OVERALL WET PATTERN. THE
FOCUS THROUGH THE REST OF THIS EVENING WILL BE ALONG THE BOUNDARY
FROM THE MID-ATLANTIC WEST THROUGH THE CENTRAL APPALACHIANS/OHIO
VALLEY AND INTO THE CENTRAL/SOUTHERN PLAINS. A FEW MORE POTENT
THUNDERSTORMS ARE EXPECTED THROUGH THE SOUTHERN MID-ATLANTIC INTO
THE CENTRAL APPALACHIANS/OHIO VALLEY WITH LOCALLY HEAVY RAINFALL
AND SEVERE WEATHER POSSIBLE. A SLIGHT RISK OF EXCESSIVE RAINFALL
(LEVEL 2/4) REMAINS IN EFFECT AS SOME SCATTERED INSTANCES OF FLASH
FLOODING ARE POSSIBLE, AND THE STORM PREDICTION CENTER HAS ALSO
OUTLINED A SLIGHT RISK OF SEVERE WEATHER (LEVEL 2/5) MAINLY FOR
THE THREAT OF SOME DAMAGING WINDS. ANOTHER SLIGHT RISK OF
EXCESSIVE RAINFALL IS ALSO IN EFFECT ACROSS PORTIONS OF THE
WESTERN TO CENTRAL GULF COAST, THOUGH THE THREAT SHOULD TAPER OFF
INTO THE EVENING HOURS. ADDITIONAL ROUNDS OF STORMS ARE FORECAST
BOTH THURSDAY AND FRIDAY WITH THE FOCUS SHIFTING INTO THE OZARKS
AND SOUTHEAST AS THE BOUNDARY SLIDES A BIT FURTHER SOUTHWARD. AT
LEAST ISOLATED INSTANCES OF FLASH FLOODING WILL REMAIN POSSIBLE.
A DEEP PACIFIC UPPER-LOW REMAINS ENTRENCHED OVER THE WESTERN U.S.
WITH ONLY SLOW EASTWARD PROGRESS EXPECTED THROUGH THE NEXT COUPLE
DAYS. SHOWERS AND THUNDERSTORMS WILL CONTINUE BROADLY FROM
CENTRAL/NORTHERN CALIFORNIA INTO THE PACIFIC NORTHWEST AND EAST
INTO THE NORTHERN ROCKIES TODAY AND TOMORROW BEFORE CENTERING ON
THE NORTHERN GREAT BASIN/ROCKIES BY FRIDAY. SOME ISOLATED FLASH
FLOODING IS POSSIBLE ESPECIALLY FOR THE NORTHERN ROCKIES DUE TO
MORE SENSITIVE MOUNTAINOUS TERRAIN AND BURN SCARS. ELSEWHERE, AN
UPPER-LOW DROPPING SOUTH FROM SOUTHEASTERN CANADA WILL HELP TO
SPIN UP A LOW PRESSURE/FRONTAL SYSTEM INTO NEW ENGLAND LATE
THURSDAY INTO FRIDAY BRINGING SHOWERS AN THUNDERSTORMS. SOME OF
THE RAINFALL MAY BE HEAVY, PARTICULARLY ACROSS CENTRAL NEW ENGLAND
INTO SOUTHERN MAINE. MOST OF THE MIDWEST AND SOUTHWEST SHOULD
REMAIN DRY.
TEMPERATURES IN GENERAL REMAIN A BIT FLIPPED FLOPPED ACROSS THE
LOWER 48 THIS WEEK AS BELOW AVERAGE TEMPERATURES ARE FAVORED
ACROSS THE SOUTHERN U.S. WITH ABOVE AVERAGE TEMPERATURES TO THE
NORTH. HOT SUMMERLIKE HEAT HAS PERSISTED PARTICULARLY FOR THE
NORTHERN ROCKIES/GREAT BASIN INTO THE NORTHERN PLAINS AND UPPER
MIDWEST, WHERE HIGHS INTO THE 90S ARE UPWARDS OF 25-35 DEGREES
ABOVE AVERAGE. MEANWHILE, TEMPERATURES ARE WELL BELOW AVERAGE
ACROSS CALIFORNIA, THE GREAT BASIN, AND THE SOUTHWEST UNDER THE
AFOREMENTIONED DEEP UPPER-LOW. FORECAST HIGHS ARE GENERALLY IN THE
50S AND 60S OUTSIDE OF THE DESERT SOUTHWEST WHERE RELATIVELY
WARMER BUT STILL BELOW AVERAGE HIGHS INTO THE 80S AND LOW 90S ARE
EXPECTED. TEMPERATURES WILL REMAIN CLOSER TO AVERAGE FURTHER EAST
FROM THE SOUTH-CENTRAL U.S. TO EAST COAST WITH 80S COMMON FURTHER
SOUTH AND 70S FURTHER NORTH. CONDITIONS WILL BE A BIT COOLER WITH
MEAN TROUGHING IN PLACE OVER NEW ENGLAND, WITH HIGHS IN THE 60S.
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