986
WWUS20 KWNS 201829
SEL4
SPC WW 201829
DCZ000-DEZ000-MDZ000-NCZ000-NJZ000-PAZ000-VAZ000-CWZ000-210200-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 604
NWS STORM PREDICTION CENTER NORMAN OK
230 PM EDT THU AUG 20 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
DELAWARE
CENTRAL AND EASTERN MARYLAND
NORTHEAST NORTH CAROLINA
MUCH OF NEW JERSEY
EASTERN AND SOUTHEAST PENNSYLVANIA
NORTHERN INTO SOUTHERN AND EASTERN VIRGINIA
COASTAL WATERS
* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
1000 PM EDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY
ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
A TORNADO OR TWO POSSIBLE
SUMMARY...SCATTERED SEVERE THUNDERSTORMS ARE FORECAST TO DEVELOP AND
INTENSIFY THIS AFTERNOON. THE STRONGER THUNDERSTORMS WILL LIKELY
ORGANIZE INTO LINE SEGMENTS AND A FEW SUPERCELLS. SCATTERED
DAMAGING GUSTS WILL BE THE PRIMARY HAZARD BUT A TORNADO OR TWO IS
POSSIBLE. UPSCALE GROWTH INTO ONE OR MORE LINE SEGMENTS IS EXPECTED
BY THE EVENING AS THIS ACTIVITY MOVES EAST TOWARDS THE COAST.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST
OF TRENTON NJ TO 15 MILES SOUTHEAST OF ROANOKE RAPIDS NC. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
26025.
...SMITH
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