MESOSCALE DISCUSSION 1279
   NWS STORM PREDICTION CENTER NORMAN OK
   0932 PM CDT MON JUN 22 2009
   
   AREAS AFFECTED...NRN AND CNTRL FL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 493...
   
   VALID 230232Z - 230330Z
   
   CORRECTED FOR ATTN HEADER
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 493
   CONTINUES.
   
   THE THREAT FOR ISOLATED DAMAGING WIND AND HAIL CONTINUES PRIMARILY
   ALONG THE ERN THIRD OF WW 493. CONFIDENCE IS NOT PARTICULARLY HIGH
   THAT SUSTAINED...ROBUST STORMS WILL DEVELOP IN WRN PORTIONS OF WW.
   
   A SWD MOVING CONVECTIVE OUTFLOW BOUNDARY EXTENDS FROM ABOUT 50 SM N
   OF CAPE CANAVERAL NWWD TO ABOUT 50 SM EAST OF TALLAHASSEE. MODERATE
   INSTABILITY PERSISTS SOUTH OF THIS BOUNDARY WITH MLCAPE FROM AROUND
   1500 J/KG ALONG THE E-CNTRL FL COAST TO 2500 J/KG ALONG THE W CNTRL
   COAST. PRIMARY THUNDERSTORM DEVELOPMENT REMAINS  OVER THE E CNTRL
   COAST WITHIN ZONE OF ENHANCED CONVERGENCE AND LIFT WHERE THE SWD
   MOVING OUTFLOW BOUNDARY IS INTERSECTING THE SEA-BREEZE BOUNDARY. THE
   OUTFLOW BOUNDARY REMAINS SKELETAL FARTHER WEST THROUGH THE REMAINDER
   OF N CNTRL FL. THE 00Z RAOB FROM TAMPA INDICATES AN INVERSION BASED
   AROUND 850 MB...AND AS THE BOUNDARY LAYER COOLS...SURFACE BASED
   CONVECTIVE INHIBITION WILL LIKELY CONTINUE TO INCREASE. WRN END OF
   OUTFLOW BOUNDARY IS NOT BEING REINFORCED BY ONGOING STORMS AND WILL
   LIKELY WEAKEN. THIS IN CONJUNCTION WITH THE STABILIZING BOUNDARY
   LAYER SUGGEST IT MAY BE DIFFICULT TO INITIATE ROBUST STORMS IN WRN
   HALF OF WW 493.
   
   ..DIAL.. 06/23/2009
   
   
   ATTN...WFO...MLB...TBW...JAX...TAE...
   
   LAT...LON   29078093 27468034 28068178 28758268 29838321 30248352
               30478311 30068239 29678210 29578126 29078093