MESOSCALE DISCUSSION 0348
   NWS STORM PREDICTION CENTER NORMAN OK
   0255 PM CDT MON APR 04 2011
   
   AREAS AFFECTED...LA...MS...NRN AL
   
   CONCERNING...TORNADO WATCH 91...93...
   
   VALID 041955Z - 042145Z
   
   CORRECTED
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 91...93...CONTINUES.
   
   18Z SOUNDINGS SHOW RELATIVELY STRONG INSTABILITY IN PLACE FROM LA
   INTO MS WITH MUCAPE AROUND 3000 J/KG. ALSO DEPICTED IN THE SOUNDINGS
   WAS RELATIVELY STEEP LAPSE RATES PROFILES ALOFT WHICH SHOULD LEAD TO
   ROBUST UPDRAFTS.
   
   EARLIER STORMS THAT MOVED ACROSS NRN MS AND INTO TN HAVE LEFT A
   TRAILING OUTFLOW BOUNDARY OVER NRN AND CNTRL MS...TRAILING SWWD TO
   THE COLD FRONT OVER NRN LA. RECENTLY...STORMS OVER NRN LA HAVE
   BECOME INTENSE SUPERCELLS WITH INDICATIONS OF TORNADOES.
   
   AS THESE STORMS CONTINUE NEWD OVER NERN LA AND CNTRL MS...THERE WILL
   BE A THREAT OF TORNADOES...DAMAGING WINDS AND HAIL. A FAVORED ZONE
   FOR ENHANCED LOW LEVEL SHEAR AND TORNADIC POTENTIAL WILL BE ALONG
   THE OUTFLOW BOUNDARY.
   
   ALSO NOTED IN THE MIDDAY SOUNDINGS AND VWPS WAS A MID LEVEL BACKING
   OF THE WINDS. THIS MAY DISRUPT TORNADO/SUPERCELL POTENTIAL SOMEWHAT
   DUE TO STORM MODE...BUT EVEN WITH A MORE LINEAR
   STRUCTURE...PARTICULARLY DAMAGING WINDS MAY OCCUR ALONG WITH
   EMBEDDED AREAS OF ROTATION.
   
   ..JEWELL.. 04/04/2011
   
   
   ATTN...WFO...BMX...MOB...JAN...LIX...LCH...SHV...
   
   LAT...LON   30899273 32239226 32539191 32809028 33528899 33758779
               33388739 32378777 31588862 31059067 30899273