MESOSCALE DISCUSSION 0462
   NWS STORM PREDICTION CENTER NORMAN OK
   0559 PM CDT SAT APR 16 2011
   
   AREAS AFFECTED...COASTAL SC...ERN NC AND SERN VA
   
   CONCERNING...TORNADO WATCH 150...
   
   VALID 162259Z - 170030Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 150 CONTINUES.
   
   THREAT FOR TORNADOES...LARGE HAIL AND DAMAGING WIND CONTINUES FROM
   COASTAL SC...ERN NC INTO SERN VA. THE THREAT FOR STRONG TORNADOES
   APPEARS GREATEST FROM ERN NC THROUGH SERN VA NEXT FEW HOURS. CURRENT
   INDICATIONS ARE THAT SEVERE THREAT MAY PERSIST OVER EXTREME ERN NC
   ABOUT 1-2 HOUR BEYOND EXPIRATION TIME OF TORNADO WATCH 150. A LOCAL
   EXTENSION IN TIME MAY BE NEEDED PRIOR TO WW EXPIRATION FOR A PORTION
   OF MOREHEAD CITY AND MAYBE WAKEFIELD CWA.
   
   LINE OF DISCRETE SUPERCELLS CONTINUES THROUGH INSTABILITY AXIS WITH
   500-1000 J/KG MLCAPE FROM COASTAL SC...ERN NC INTO SERN VA. STORMS
   ARE MOVING WITH AN EWD COMPONENT OF 30 KT WHICH SUGGEST THEY WILL
   NOT CLEAR THE NC OUTER BANKS UNTIL AROUND 02-03Z. GIVEN THE DISCRETE
   STORM MODE...VERY LARGE HODOGRAPHS WITH 0-1 KM SRH FROM 500-700
   M2/S2...AND MODEST BUT SUFFICIENT SBCAPE...THREAT FOR STRONG
   TORNADOES WILL PERSIST NEXT FEW HOURS OR UNTIL ACTIVITY CLEARS THE
   COAST. BACK EDGE OF SEVERE THREAT AND REDEVELOPMENT APPEARS TO BE
   WITH BAND OF STORMS DEVELOPING FROM NEAR BRUNSWICK NC NWD TO JUST
   WEST OF WAKEFIELD VA.
   
   ..DIAL.. 04/16/2011
   
   
   ATTN...WFO...AKQ...MHX...RAH...ILM...CHS...
   
   LAT...LON   34517661 33877794 33197925 32718000 33088001 34037902
               35857801 37317723 37167619 35377556 34517661