MESOSCALE DISCUSSION 0340
   NWS STORM PREDICTION CENTER NORMAN OK
   0221 PM CDT SAT MAR 30 2013
   
   AREAS AFFECTED...PORTIONS OF NERN TX AND NRN LA
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 301921Z - 302045Z
   
   PROBABILITY OF WATCH ISSUANCE...80 PERCENT
   
   SUMMARY...SVR TSTMS POSING A THREAT FOR LARGE HAIL AND DAMAGING
   WINDS WILL CONTINUE THROUGH EARLY EVENING. IN ADDITION...A TORNADO
   OR TWO IS ALSO POSSIBLE. A WW WILL BE COORDINATED WITH LOCAL NWS
   OFFICES SHORTLY.
   
   DISCUSSION...WIDELY SCTD TSTMS HAVE DEVELOPED ACROSS NERN TX AND NRN
   LA IN THE WAKE OF AN UPPER LEVEL VORT MAX NOW CROSSING THE LOWER MS
   RIVER. THIS REGION IS ALSO JUST SOUTH OF A STATIONARY FRONTAL
   BOUNDARY. DIURNAL HEATING HAS RESULTED IN SBCAPE OF AROUND 1000
   J/KG.  DEEP LAYER SHEAR OF 40 KTS WILL SUPPORT SUPERCELL STRUCTURES
   AND 0-1 KM SRH VALUES OF 150-200 M2/S2 NEAR AND SOUTH OF THE SURFACE
   BOUNDARY SUGGESTS THE POTENTIAL FOR LOW-LEVEL ROTATION. A WW IS
   LIKELY PRIOR TO 21Z.
   
   ..BUNTING/CORFIDI.. 03/30/2013
   
   
   ATTN...WFO...JAN...LCH...SHV...TSA...FWD...OUN...
   
   LAT...LON   33859588 34149546 34139510 33789448 33459424 32959375
               32679304 32429223 31949147 31609176 31289179 31309358
               31419463 31829542 32559569 33859588