MESOSCALE DISCUSSION 1345
   NWS STORM PREDICTION CENTER NORMAN OK
   0503 PM CDT TUE JUN 21 2011
   
   AREAS AFFECTED...FAR NERN AL...SERN TN...NRN GA...SWRN NC
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 212203Z - 212300Z
   
   UPSCALE GROWTH INTO A QLCS HAS OCCURRED THROUGH PORTIONS OF NERN
   AL...WHICH SHOULD RESULT IN A CONTINUATION OF SCATTERED DAMAGING
   WIND REPORTS INTO PORTIONS OF THE SRN APPALACHIANS. A SEVERE TSTM
   WATCH ISSUANCE IS POSSIBLE ACROSS THE REGION.
   
   SQUALL LINE EXTENDED FROM LINCOLN COUNTY TN TO CHEROKEE COUNTY AL OF
   2155Z. ALTHOUGH UPPER-LEVEL SUPPORT APPEARS NEBULOUS...A BELT OF
   30-35 KT UNIDIRECTIONAL LOW/MID-LEVEL SWLYS WERE NOTED BEHIND THIS
   LINE IN THE HUNTSVILLE/BIRMINGHAM VWP DATA. WITH DOWNSTREAM SURFACE
   TEMPERATURE/DEW POINT SPREADS AROUND 25-30 DEG F...INDICATIVE OF A
   STEEP LOW-LEVEL LAPSE RATE PROFILE...A CORRIDOR OF RELATIVELY
   GREATER DAMAGING WIND THREAT SHOULD EXTEND NE OF THE CURRENT SQUALL
   LINE THROUGH EARLY EVENING.
   
   ..GRAMS.. 06/21/2011
   
   
   ATTN...WFO...GSP...MRX...FFC...OHX...BMX...HUN...
   
   LAT...LON   34328572 35058628 35458596 35778546 36058453 36068370
               35718308 35228323 34578369 34218424 33948521 33918563
               34328572