MESOSCALE DISCUSSION 0493
   NWS STORM PREDICTION CENTER NORMAN OK
   1138 AM CDT FRI MAR 28 2008
   
   AREAS AFFECTED...NE LA...CNTRL MS...INTO W CNTRL AL
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 281638Z - 281845Z
   
   SEVERE POTENTIAL APPEARS LIMITED.  BUT...TRENDS WILL BE MONITORED.
   
   ALTHOUGH LATEST RUC GUIDANCE IS SUGGESTIVE OF A TENDENCY TOWARD
   LOWER/MID TROPOSPHERIC WARMING DURING THE NEXT FEW HOURS...AND
   THROUGH THE AFTERNOON...INHIBITION HAS BEEN SUPPRESSED OVER A LARGE
   PORTION OF THE LOWER MISSISSIPPI VALLEY INTO THE UPPER TENNESSEE
   VALLEY.  AND...WARMING OF A MOIST BOUNDARY LAYER IS CONTRIBUTING TO
   DESTABILIZATION WITHIN A LOW-LEVEL CONFLUENCE ZONE...IN THE WAKE OF
   AN INITIAL IMPULSE EMANATING FROM THE SUBTROPICAL PACIFIC.  THIS
   EXTENDS ROUGHLY ALONG THE INTERSTATE 20 CORRIDOR...SOUTH OF MONROE
   LA THROUGH THE JACKSON/MERIDIAN MS VICINITIES...INTO AREAS
   WEST/NORTH OF SELMA AL...WHERE MIXED LAYER CAPE IS GENERAL
   APPROACHING 500 J/KG.  
   
   AHEAD OF THE NEXT SUBTROPICAL IMPULSE RAPIDLY SHIFTING INTO/THROUGH
   THE RIO GRANDE VALLEY...LARGE-SCALE FORCING IS EXPECTED TO BECOME
   INCREASINGLY SUPPORTIVE OF CONVECTIVE DEVELOPMENT THIS AFTERNOON. 
   SCATTERED THUNDERSTORMS MAY INITIATE BY/SHORTLY AFTER
   18-19Z...BEFORE GRADUALLY INCREASING IN COVERAGE THEREAFTER.  THOUGH
   CAPE COULD INCREASE UP TO 1000 J/KG BY PEAK HEATING...WEAK DEEP
   LAYER SHEAR/FLOW SHOULD MINIMIZE CONVECTIVE ORGANIZATION AND SEVERE
   POTENTIAL.  BUT...SEASONABLY COOL/UNSATURATED MID-LEVEL PROFILES
   WITH MODERATELY STEEP LAPSE RATES COULD SUPPORT SOME HAIL
   APPROACHING OR BRIEFLY EXCEEDING SEVERE LIMITS.  LOCALIZED BRIEF
   STRONG GUSTY WINDS ARE ALSO POSSIBLE.
   
   ..KERR.. 03/28/2008
   
   
   ATTN...WFO...BMX...MOB...JAN...LIX...LCH...SHV...
   
   31829240 32469184 32729085 33048976 33168885 33158831
   33388727 32958694 32258707 31868792 31458911 31419051
   31179134 31249230