MESOSCALE DISCUSSION 0536
   NWS STORM PREDICTION CENTER NORMAN OK
   0329 PM CDT FRI APR 19 2013
   
   AREAS AFFECTED...PORTIONS CENTRAL/SRN SC...ERN PANHANDLE OF
   FL...ERN/SRN GA.
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 129...132...
   
   VALID 192029Z - 192230Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   129...132...CONTINUES.
   
   SUMMARY...BANDS OF TSTMS ARE EXPECTED TO CONTINUE MOVING EWD ACROSS
   DISCUSSION AREAS...OFFERING PRIMARY DAMAGING WIND THREAT.  COLD
   FRONT CLOSELY FOLLOWS PRIMARY/WRN CONVECTIVE BAND...AND WWS MAY BE
   CLEARED BEHIND THAT ACTIVITY.  CONVECTIVE TRENDS WILL BE MONITORED
   ACROSS PORTIONS NRN FL NOT NOW IN WW 132...IN CASE ANY OF THOSE
   COUNTIES MAY NEED TO BE INCLUDED...PER EARLIER COORD W/WFO JAX.
   
   DISCUSSION...PRIMARY CONVECTIVE BAND WAS EVIDENT FROM SALUDA COUNTY
   SC SSWWD ACROSS WAKULLA COUNTY FL AS OF 2015Z...MOVING WITH NET EWD
   COMPONENT OF ABOUT 25 KT.  LOCAL ACCELERATIONS ARE EXPECTED WHEREVER
   FASTER-MOVING BOW/LEWP ELEMENTS OCCUR.  IN ADDITION TO MAIN SQUALL
   LINE...BKN BAND OF TSTMS...LOCATED NEAR TBR-VLD LINE AS OF
   2015Z...MAY CONTINUE TO ORGANIZE AND BECOME MORE OF A SVR THREAT
   FROM SAV REGION INTO SERN SC. 
   
   BUOYANCY SHOULD BE NEAR PEAK OVER WARM SECTOR...WITH MODIFIED FCST
   SOUNDINGS SUGGESTING MLCAPE MAXIMIZED IN 1000-1500 J/KG RANGE WHERE
   SFC DEW POINTS REMAIN IN UPPER 60S TO LOW 70S F.  RIBBON OF
   BETTER-MIXED BOUNDARY-LAYER AIR IS EVIDENT FROM NRN FL NWD ACROSS
   SERN GA THEN NEWD OVER CENTRAL SC...WITH DEW POINTS LOW-MID 60S. 
   ALTHOUGH THIS LOWERS CAPE SOMEWHAT...IT STILL IS SUFFICIENT TO
   SUPPORT SFC-BASED SVR.  ACCOMPANYING FACTOR OF SUBCLOUD EVAPORATIVE
   POTENTIAL SUPPLEMENTS PRECIP LOADING...AS WELL AS MOMENTUM TRANSFER
   FOR MORE ORGANIZED BOW/LEWP STRUCTURES...IN SUPPORTING DAMAGING-WIND
   THREAT. 35-45 KT EFFECTIVE SHEAR MAGNITUDE SHOULD PERSIST JUST AHEAD
   OF MAIN QLCS ACROSS AREA.
   
   ..EDWARDS.. 04/19/2013
   
   
   ATTN...WFO...ILM...CHS...CAE...JAX...FFC...TAE...
   
   LAT...LON   30018449 31398347 33138218 33938180 33878004 33508009
               33097929 32608004 32098076 31418123 30678142 30808186
               30658204 30418203 30358204 30368220 30548228 30598285
               29518338 29668340 29878362 30088397 30018449