MESOSCALE DISCUSSION 0670
   NWS STORM PREDICTION CENTER NORMAN OK
   0446 PM CDT THU MAY 03 2007
   
   AREAS AFFECTED...EXTREME SERN AR...NERN LA...WCNTRL MS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 032146Z - 032245Z
   
   A TSTM LINE SEGMENT HAS FORMED ALONG SERN PERIPHERY OF EARLY DAY
   CONVECTION ACROSS SERN AR AND NCNTRL LA.  AIR MASS ALONG THE MS RVR
   BETWEEN THESE STORMS AND RESIDUAL CLUSTER OF CONVECTION OVER CNTRL
   MS HAS BECOME UNSTABLE WITH TEMPERATURES WELL INTO THE 80S RESULTING
   IN MLCAPES TO 1000-1500 J/KG.  INSPECTION OF REGIONAL VWPS SUGGESTS
   THAT THE PRIMARY BELT OF MID-LEVEL FLOW AOA 45 KTS WILL SKIRT
   FARTHER S ACROSS THE GULF COASTAL AREA DURING THE NEXT SEVERAL
   HOURS.  NONETHELESS...SHV VWP SHOWS THAT THE MCV HAS ITS OWN
   ENHANCED FLOW WITH 40-45 KTS OF WLY WINDS AROUND 1KM.  PRIMARY
   CONVECTIVE MODE SHOULD REMAIN MULTICELLULAR...BUT GIVEN THE
   COLLECTIVE COLD POOL AND THE MEAN WLY FLOW REGIME...THESE STORMS MAY
   PRODUCE DAMAGING WIND GUSTS AND PERHAPS AN ISOLD SPIN-UP AS THEY
   MOVE TOWARD THE MS RVR VLY AND INTO WCNTRL MS THROUGH EARLY EVENING.
   
   ..RACY.. 05/03/2007
   
   
   ATTN...WFO...JAN...SHV...
   
   32119207 32429201 32789196 33119201 33479122 33719008
   32818988 32319028