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Severe Thunderstorm Watch 739
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WW0739 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 739
   NWS STORM PREDICTION CENTER NORMAN OK
   325 PM EDT WED JUL 23 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          DISTRICT OF COLUMBIA
          MUCH OF MARYLAND
          PARTS OF WESTERN NORTH CAROLINA
          PARTS OF WESTERN VIRGINIA
          SMALL PART OF EASTERN WEST VIRGINIA
          COASTAL WATERS
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 325 PM UNTIL
   1100 PM EDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH
   NORTHWEST OF BALTIMORE MARYLAND TO 15 MILES WEST SOUTHWEST OF
   CHARLOTTE NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH
   SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 735...WW 736...WW
   737...WW 738...
   
   DISCUSSION...THUNDERSTORMS INCREASING ALONG AND AHEAD OF COLD FRONT
   NOW CROSSING APPALACHIANS.  WITH CLOUDS CLEARING...AIR MASS ACROSS
   WATCH AREA IS NOW BECOMING UNSTABLE AND WEAKLY CAPPED.  WITH STRONG
   UPPER TROUGH APPROACHING  FROM OH VALLEY...SHEAR AND LARGE SCALE
   ASCENT SUPPORTS INCREASING WIND DAMAGE POTENTIAL ALONG WITH
   MARGINALLY SEVERE HAIL AS STORMS SPREAD E OMTNS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
   MOTION VECTOR 27030.
   
   
   ...HALES
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