372  
WWUS20 KWNS 091801  
SEL7  
SPC WW 091801  
DCZ000-MDZ000-NCZ000-PAZ000-VAZ000-WVZ000-CWZ000-100200-  
 
URGENT - IMMEDIATE BROADCAST REQUESTED  
SEVERE THUNDERSTORM WATCH NUMBER 497  
NWS STORM PREDICTION CENTER NORMAN OK  
200 PM EDT WED JUL 9 2025  
 
THE NWS STORM PREDICTION CENTER HAS ISSUED A  
 
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF  
DISTRICT OF COLUMBIA  
MARYLAND  
FAR NORTHWESTERN NORTH CAROLINA  
SOUTH-CENTRAL PENNSYLVANIA  
NORTHERN, WESTERN, AND CENTRAL VIRGINIA  
EASTERN WEST VIRGINIA  
COASTAL WATERS  
 
* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 200 PM  
UNTIL 1000 PM EDT.  
 
* PRIMARY THREATS INCLUDE...  
SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY  
ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE  
 
SUMMARY...THUNDERSTORM COVERAGE IS EXPECTED TO INCREASE ACROSS THE  
REGION THIS AFTERNOON, WITH MULTIPLE ROUNDS OF STORMS POSSIBLE.  
MODERATE BUOYANCY AND VERTICAL SHEAR IS EXPECTED TO SUPPORT BOWING  
LINE SEGMENTS CAPABLE OF DAMAGING WIND GUSTS. A FEW INSTANCES OF  
HAIL ARE POSSIBLE AS WELL, PARTICULARLY OVER REGIONS OF HIGHER  
TERRAIN.  
 
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95  
STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES WEST NORTHWEST OF  
HAGERSTOWN MD TO 60 MILES SOUTH SOUTHWEST OF DUBLIN VA. FOR A  
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE  
UPDATE (WOUS64 KWNS WOU7).  
 
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 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW  
CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR  
27035.  
 
...MOSIER  
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