MESOSCALE DISCUSSION 0129
   NWS STORM PREDICTION CENTER NORMAN OK
   0526 PM CST THU FEB 24 2011
   
   AREAS AFFECTED...ERN/SRN AR...NRN LA...NW MS...WRN TN...SW KY
   
   CONCERNING...TORNADO WATCH 13...14...
   
   VALID 242326Z - 250100Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 13...14...CONTINUES.
   
   A THREAT FOR TORNADOES...WIND DAMAGE AND HAIL WILL CONTINUE TO MOVE
   EWD ACROSS WW 13 REACHING WRN PORTIONS OF WW 14 THIS EVENING. THE
   SEVERE THREAT SHOULD EXPAND NEWD WITH TIME AND A NEW TORNADO WATCH
   HAS BEEN ISSUED IN PARTS OF FAR SE MO AND SW KY TO ACCOUNT FOR THIS
   THREAT.
   
   A SQUALL-LINE ABOUT 500 STATUTE MILES IN LENGTH IS ONGOING ACROSS
   ERN AR AND NW LA ASSOCIATED WITH VERY STRONG LARGE-SCALE ASCENT
   AHEAD OF AN APPROACHING SRN PLAINS UPPER-LEVEL TROUGH. THE NRN END
   OF THE LINE IS LOCATED NEAR A WARM FRONT THAT EXTENDS ENEWD FROM NE
   AR INTO WRN TN AND SRN KY. LOW-LEVEL SHEAR IS ENHANCED ALONG THE
   BOUNDARY WITH THE MEMPHIS WSR-88D VWP SHOWING ABOUT 30 KT OF 0-1 KM
   SHEAR. IN ADDITION TO THE SHEAR...LCL HEIGHTS FROM THE BOUNDARY NWD
   ARE ESTIMATED AROUND 750 METERS. THESE TWO FACTORS SHOULD BE
   FAVORABLE FOR ISOLATED TORNADO DEVELOPMENT WITH EMBEDDED BOWING LINE
   SEGMENTS. THIS TORNADO THREAT SHOULD MOVE NEWD WITH TIME REACHING SW
   KY EARLY THIS EVENING. CELLS THAT DEVELOP AHEAD OF THE LINE MAY ALSO
   HAVE A TORNADO THREAT. DAMAGING WIND GUSTS WILL BE COMMON ALONG THE
   ENTIRE LENGTH OF THE LINE DUE TO A FORWARD SPEED OF THE LINE AROUND
   40 KT AND DUE TO THE VERY STRONG FLOW JUST ABOVE THE SURFACE. THE
   WIND DAMAGE THREAT SHOULD MOVE INTO WRN TN...NW MS AND NERN LA IN
   THE 00Z TO 01Z TIMEFRAME.
   
   ..BROYLES.. 02/24/2011
   
   
   ATTN...WFO...LMK...OHX...BMX...HUN...PAH...MEG...JAN...LZK...
   SHV...
   
   LAT...LON   31919249 31649360 31629436 31809484 32189488 32819457
               34509336 35799186 36439097 37098927 37158757 36798672
               35818676 34968703 34318741 33498833 32629019 32179162
               31919249