MESOSCALE DISCUSSION 0030
   NWS STORM PREDICTION CENTER NORMAN OK
   0600 PM CST SUN JAN 13 2013
   
   AREAS AFFECTED...CNTRL AND NERN AL THROUGH NWRN GA...ERN TN AND
   EXTREME SERN KY
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 140000Z - 140200Z
   
   PROBABILITY OF WATCH ISSUANCE...20 PERCENT
   
   SUMMARY...A MARGINAL THREAT FOR ISOLATED DAMAGING WIND AND PERHAPS A
   BRIEF TORNADO WILL PERSIST INTO THE EARLY EVENING FROM CNTRL THROUGH
   NE AL...NWRN GA...ERN TN AND EXTREME SERN KY. OVERALL THREAT SHOULD
   GRADUALLY DIMINISH TOWARD MID EVENING.
   
   DISCUSSION...THIS EVENING AN EXPANSIVE SQUALL LINE WITH EMBEDDED
   MESO-VORTICES EXTENDS FROM SERN KY...ERN MIDDLE TN INTO NERN AND
   CNTRL AL. THE LINE IS MOVING EAST AT AROUND 25 KT. THE WARM SECTOR
   REMAINS ONLY MARGINALLY UNSTABLE AHEAD OF THE LINE...ESPECIALLY WITH
   NRN EXTENT INTO THE TN VALLEY WITH MLCAPE BELOW 500 J/KG.
   HOWEVER...THE STORMS REMAIN EMBEDDED IN WIND PROFILES WITH 60 KT 0-6
   KM SHEAR AND 300+ M2/S2 STORM RELATIVE HELICITY SUPPORTIVE OF
   ORGANIZED STRUCTURES. THE NRN END OF THE LINE IS APPROACHING THE ERN
   EDGE OF THE MOIST CORRIDOR WITH DEWPOINTS ONLY IN THE 50S ACROSS ERN
   TN. FARTHER SOUTH ACROSS AL THE MOIST CORRIDOR IS WIDER...BUT TREND
   WILL BE FOR LOW LEVEL WINDS AND HODOGRAPH SIZE TO GRADUALLY DECREASE
   WITH TIME AS THE LLJ SHIFTS NWD THROUGH THE TN AND OH VALLEYS. NET
   RESULT IS THAT WHILE SOME THREAT WILL EXIST FOR ISOLATED DAMAGING
   WIND AND A BRIEF TORNADO NEXT 2-3 HOURS...OVERALL TREND SHOULD BE
   FOR THE THREAT TO DECREASE WITH TIME.
   
   ..DIAL/EDWARDS.. 01/14/2013
   
   
   ATTN...WFO...MRX...JKL...FFC...OHX...BMX...HUN...
   
   LAT...LON   33088688 35438536 36838447 37058412 36248402 33038574
               33088688