904
FXUS01 KWBC 270801
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
359 AM EDT WED MAY 27 2026
VALID 12Z WED MAY 27 2026 - 12Z FRI MAY 29 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 PLAINS AND UPPER
MIDWEST WITH WIDESPREAD HIGH TEMPERATURES WELL INTO THE 80S AND
90S...
A VERY WARM, HUMID, AND UNSTABLE AIR MASS WILL CONTINUE TO FOSTER
NUMEROUS SHOWERS AND THUNDERSTORMS FOR MUCH OF THE SOUTHERN U.S.
THE NEXT FEW DAYS. THUNDERSTORMS CAPABLE OF PRODUCING HEAVY
RAINFALL AND FLASH FLOODING WILL AGAIN BE A CONCERN TODAY,
PARTICULARLY ACROSS PARTS OF THE GULF COAST FROM EASTERN TEXAS TO
SOUTHERN MISSISSIPPI AND FAR SOUTHWEST ALABAMA. THE WEATHER
PREDICTION CENTER HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL
(LEVEL 2/4), HIGHLIGHTING THE POTENTIAL FOR SCATTERED INSTANCES OF
FLASH FLOODING. SATURATED SOILS FROM PREVIOUS RAINFALL WILL
ELEVATE THE CONCERN, PARTICULARLY IN LOW-LYING AND POOR DRAINAGE
AREAS. URBAN CENTERS WILL BE ESPECIALLY VULNERABLE AS WELL.
FARTHER NORTH, A NEARLY STATIONARY BOUNDARY WILL ALSO BECOME A
FOCUS FOR HEAVY RAINFALL ACROSS PORTIONS OF THE OHIO VALLEY AND
THE CENTRAL APPALACHIANS THIS AFTERNOON. SIMILAR TO THE RISK
ACROSS THE GULF COAST STATES, PRIOR RAINFALL AND INCREASINGLY
SATURATED SOILS WILL RAISE THE FLASH FLOOD THREAT IN SPOTS. AS A
RESULT, THE WEATHER PREDICTION CENTER HAS ALSO OUTLINED A SLIGHT
RISK TO HIGHLIGHT THIS AREA OF CONCERN. IN ADDITION TO THE HEAVY
RAIN THREAT, SEVERE THUNDERSTORMS WILL ALSO BE POSSIBLE, MAINLY
FROM THE OHIO VALLEY EASTWARD INTO THE SOUTHERN MID-ATLANTIC. THE
PRIMARY HAZARDS WITH ANY STRONG TO SEVERE STORMS WOULD BE DAMAGING
WIND GUSTS AND HAIL.
MEANWHILE, A LARGE PACIFIC LOW-PRESSURE SYSTEM WILL CONTINUE TO
SIT AND SPIN OVER THE GREAT BASIN AND CALIFORNIA, RESULTING IN
UNSETTLED WEATHER FOR PARTS OF THE WEST THROUGH MID TO LATE WEEK.
UNDERNEATH AND AHEAD OF THIS SYSTEM, INCREASING MOISTURE WILL
SUPPORT NUMEROUS RAIN SHOWERS AND THUNDERSTORMS, ESPECIALLY OVER
CALIFORNIA, THE GREAT BASIN, AND PORTIONS OF THE PACIFIC
NORTHWEST. SOME SNOW IS ALSO LIKELY IN THE HIGHEST ELEVATIONS OF
THE SIERRA. THE COMBINATION OF CLOUD COVER, PRECIPITATION, AND A
COLDER AIR MASS ALOFT WILL MAINTAIN TEMPERATURES THAT ARE 10 TO 20
DEGREES BELOW NORMAL ACROSS PORTIONS OF CALIFORNIA, NEVADA, UTAH,
AND ARIZONA. GUSTY WINDS WILL ALSO ACCOMPANY THIS SYSTEM, CREATING
ELEVATED FIRE WEATHER CONCERNS WHERE CONDITIONS REMAIN DRY.
IN CONTRAST TO THE COOLER THAN NORMAL TEMPERATURES FOR PARTS OF
THE WEST, UNSEASONABLY HOT WEATHER WILL REMAIN ENTRENCHED ACROSS
THE NORTHERN PLAINS AND UPPER MIDWEST. HIGH TEMPERATURES ARE
FORECAST TO CLIMB WELL INTO THE 80S AND 90S THE NEXT FEW DAYS,
WITH SOME LOCATIONS ACROSS EASTERN MONTANA AND WESTERN NORTH
DAKOTA POTENTIALLY NEARING OR ECLIPSING 100 DEGREES. THESE EARLY
SEASON SUMMERLIKE TEMPERATURES COULD BECOME HAZARDOUS TO THOSE WHO
ARE HEAT-SENSITIVE, HIGHLIGHTED BY WIDESPREAD MODERATE TO MAJOR
LEVELS OF HEATRISK THROUGH THE END OF THE WEEK.
MILLER
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