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Severe Thunderstorm Watch 355
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WW0355 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
High Moderate
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 355
   NWS STORM PREDICTION CENTER NORMAN OK
   1240 PM EDT TUE MAY 24 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEAST MARYLAND
          NORTHERN NORTH CAROLINA
          CENTRAL AND EASTERN VIRGINIA
          COASTAL WATERS
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL
   800 PM EDT.
   
   HAIL TO 1.5 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 100
   STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES WEST
   NORTHWEST OF PATUXENT RIVER MARYLAND TO 30 MILES SOUTHEAST OF
   ROCKY MOUNT NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE
   WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   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 352...WW 353...WW 354...
   
   DISCUSSION...NOCTURNAL MCS CURRENTLY EMERGING FROM THE BLUE RIDGE
   HAS SHOWN A RAPID INCREASE IN STORM COVERAGE AND INTENSITY ALONG
   ERN/SRN PERIPHERY OF SYSTEM COLD POOL.  AMBIENT INFLOW AIR MASS HAS
   WARMED INTO THE 80S.  WHEN COUPLED WITH BOUNDARY LAYER DEWPOINTS IN
   THE 60S...ENVIRONMENT HAS BECOME MODERATELY UNSTABLE WITH MLCAPE
   VALUES OF 1000-2000 J/KG.  GIVEN 40-50 KT WLY FLOW OBSERVED IN THE
   700-500 MB LAYER /PER REGIONAL VAD DATA/...SETUP WILL FAVOR
   ORGANIZED STORM MODES INCLUDING LINE SEGMENTS AND SUPERCELLS CAPABLE
   OF DAMAGING WINDS AND HAIL.
   
   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 28035.
   
   
   ...MEAD
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