MESOSCALE DISCUSSION 1758
   NWS STORM PREDICTION CENTER NORMAN OK
   0945 AM CDT THU JUL 10 2003
   
   AREAS AFFECTED...SRN AR...NRN LA AND WEST CENTRAL MS
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 101445Z - 101545Z
   
   MONITORING DEVELOPING THUNDERSTORM LINE IN SWRN AR FOR FORWARD
   PROPAGATION AND POSSIBLE WW.
   
   STORMS IN SWRN AR HAVE SLOWLY ORGANIZED INTO A LINE WITH A
   DEVELOPING COLD POOL. THE FLOW FROM THE SURFACE TO 850 MB BEHIND THE
   LINE IS FROM THE NW AT 20 KT AND IF THE LINE BEGINS TO
   ACCELERATE...WIND DAMAGE WOULD BECOME LIKELY WITH THIS SYSTEM.
   ALTHOUGH THE MORNING SOUNDINGS AT SHV AND JAN SHOWED MLCAPES FROM
   1500-2000 J/KG...CONSIDERABLE LOW CLOUDS AHEAD OF THE LINE IS
   CURRENTLY SLOWING DOWN HEATING AND CONSEQUENT BOUNDARY LAYER
   DESTABILIZATION. HOWEVER...MIXING IS EXPECTED TO THIN THE CLOUDS
   DURING THE NEXT HOUR OR SO. ADDITIONAL HEATING WOULD STRENGTHEN THE
   AMOUNT OF INSTABILITY INGESTED BY THE LINE AND AID IN FORWARD
   PROPAGATION...AIDING IN AN INCREASED WIND THREAT.
   
   ..IMY.. 07/10/2003
   
   
   ATTN...WFO...MEG...JAN...LZK...SHV...
   
   32809380 33459397 33709316 34159113 33738988 32898964
   32279031 32169264