678
FXUS01 KWBC 200753
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
352 AM EDT TUE MAY 20 2025
VALID 12Z TUE MAY 20 2025 - 12Z THU MAY 22 2025
...SEVERE WEATHER AND FLASH FLOODING RISKS SHIFT INTO THE
OHIO/TENNESSEE/MISSISSIPPI VALLEYS TODAY, FOLLOWED BY THE EAST
COAST ON WEDNESDAY...
...ABOVE AVERAGE TEMPERATURES ACROSS SOUTHERN TIER STATES; BELOW
AVERAGE TEMPERATURES ACROSS THE NORTHERN TIER...
A STRONG LOW PRESSURE SYSTEM WILL SPREAD SCATTERED SHOWERS AND
THUNDERSTORMS ACROSS THE MISSISSIPPI VALLEY TODAY, THEN THE OHIO
VALLEY/EAST COAST ON WEDNESDAY. THERE'S AN ENHANCED RISK (LEVEL
3/5) OF SEVERE THUNDERSTORMS FOR PORTIONS OF THE MID/DEEP SOUTH TO
TENNESSEE VALLEY AND CUMBERLAND PLATEAU, ACCORDING TO THE STORM
PREDICTION CENTER. MULTIPLE ROUNDS OF SEVERE STORMS CAPABLE OF
PRODUCING SOME STRONG TORNADOES, SCATTERED TO WIDESPREAD WIND
DAMAGE AND LARGE TO ISOLATED SIGNIFICANT SEVERE HAIL WILL BE
POSSIBLE. A BROAD SLIGHT RISK (AT LEAST 15%) OF EXCESSIVE RAINFALL
IS IN EFFECT FOR PORTIONS OF THE MIDWEST AND OHIO/TENNESSEE
VALLEYS TODAY AS WELL. MOIST SOILS IN THE MID-ALTANTIC/NORTHEAST
WILL SUPPORT A MARGINAL RISK (AT LEAST 5%) OF FLASH FLOODING ON
WEDNESDAY WHEN TODAY'S STORMS MOVE INTO THE REGION. A MORE
UNSTABLE ENVIRONMENT TO THE SOUTH WILL ALLOW FOR INCREASED
THUNDERSTORM ACTIVITY AND THE POTENTIAL FOR ISOLATED SEVERE STORMS
ALONG THE SOUTHEAST/MID-ATLANTIC COAST.
UPPER TROUGHING OVER SOUTHERN CANADA AND THE NORTHERN TIER OF THE
U.S. WILL ALLOW FOR A COOLER AIRMASS TO PARK OVER THE REGION
THROUGH LATE THIS WEEK. HIGH TEMPERATURES IN THE 40S AND 50S WILL
BE 20-35 DEGREES BELOW AVERAGE FOR PARTS OF THE NORTHERN PLAINS
AND UPPER MIDWEST TODAY AND WEDNESDAY. MEANWHILE, A ZONAL AND
RIDGE-LIKE PATTERN OVER THE SOUTHERN TIER WILL SUPPLY AMPLE WARM
AIR INTO THE REGION OVER THE NEXT FEW DAYS. WIDESPREAD HIGH
MINIMUM TEMPERATURE RECORDS MAY BE TIED OR BROKEN ACROSS THE
SOUTHEAST AND SOUTHERN CALIFORNIA OVER THE NEXT COUPLE OF NIGHTS.
ELSEWHERE, SOME LIGHT SNOW IS POSSIBLE OVER THE MOUNTAINS OF
NORTHWEST WYOMING TODAY. THINGS DRY OUT ACROSS THE NORTHWEST ON
WEDNESDAY.
KEBEDE
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