MESOSCALE DISCUSSION 0565
   NWS STORM PREDICTION CENTER NORMAN OK
   0454 PM CDT SAT APR 27 2013
   
   AREAS AFFECTED...NERN MS...NRN AL...FAR NWRN GA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 272154Z - 272300Z
   
   PROBABILITY OF WATCH ISSUANCE...60 PERCENT
   
   SUMMARY...AN INCREASE IN TSTM INTENSITY HAS BEEN NOTED OVER THE PAST
   COUPLE HRS ACROSS NERN MS/NWRN AL. THIS ACTIVITY SHOULD CONTINUE
   ADVANCING EWD NEARLY PARALLEL TO A WARM FRONT DRAPED ACROSS THE
   AREA...BUT INTO A PROGRESSIVELY LESS UNSTABLE ENVIRONMENT.
   CONVECTIVE TRENDS ARE BEING CLOSELY MONITORED FOR A POSSIBLE WW.
   
   DISCUSSION...RADAR LOOP SHOWS A SUPERCELL MOVING ACROSS
   FRANKLIN/COLBERT COUNTIES IN AL...WHICH IS LIKELY ANCHORED INVOF A
   WARM FRONT ANALYZED FROM ROUGHLY 20 N TUP TO 25 NNE GAD TO 20 E
   ATL...WITH RECENT REPORTS OF LARGE HAIL ASSOCIATED WITH THIS STORM.
   ACTIVITY FARTHER S IN THE WARM SECTOR HAS SHOWN LESS
   ORGANIZATION...BUT OCCASIONAL UPWARD PULSES IN INTENSITY HAVE BEEN
   NOTED WITH ASSOCIATED POTENTIAL FOR HAIL. 
   
   DESPITE FAVORABLE DEEP-LAYER SHEAR IN THE PRESENCE OF A MIDLEVEL
   JET...INSTABILITY REMAINS QUITE MARGINAL...AND DECREASES WITH EWD
   EXTENT INTO PARTS OF NERN AL AND NWRN GA...WHERE SFC DEW POINTS ARE
   ONLY IN THE LOW-TO-MID-50S F. MOISTURE ADVECTION SHOULD INCREASE
   LATER THIS EVENING ACROSS ERN PORTIONS OF THE HIGHLIGHTED AREA AND
   SHOULD MAINTAIN MARGINAL INSTABILITY BEYOND THE ONSET OF DIURNAL
   COOLING. GIVEN THE UNCERTAINTY REGARDING THE POTENTIAL FOR STORM
   INTENSITY TO BE MAINTAINED FARTHER E...A WW IS STILL
   QUESTIONABLE...BUT CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED.
   
   ..ROGERS/KERR.. 04/27/2013
   
   
   ATTN...WFO...FFC...BMX...HUN...MEG...JAN...
   
   LAT...LON   34408509 33998510 33688541 33698611 33628710 33518748
               33558830 33808868 34328875 34758843 34878790 34778654
               34408509