MESOSCALE DISCUSSION 0790
   NWS STORM PREDICTION CENTER NORMAN OK
   0605 PM CDT SUN MAY 10 2009
   
   AREAS AFFECTED...CNTRL MS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 286...
   
   VALID 102305Z - 110030Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 286
   CONTINUES.
   
   SMALL CONVECTIVE CLUSTER NEAR/NORTH THROUGH EAST OF VICKSBURG HAS
   EXHIBITED RECENT SIGNS OF INCREASING ORGANIZATION AND INTENSITY. 
   ACTIVITY APPEARS AIDED BY AN AREA OF STRONGER FORCING ASSOCIATED
   WITH A WEAK IMPULSE JUST SOUTH OF THE STRONGER WESTERLIES...AND
   EMBEDDED WITHIN A BELT OF 30-35 KT WESTERLY 500 MB FLOW EXTENDING
   ACROSS CENTRAL MISSISSIPPI.  THIS MOMENTUM MAY COME TO CHARACTERIZE 
   THE CONVECTIVE SYSTEM MOTION DURING THE NEXT FEW HOURS...WITH
   ACTIVITY PROBABLY SPREADING ACROSS THE JACKSON AREA AROUND 00Z...
   INTO THE VICINITY OF MERIDIAN BY 02Z.  THE ENVIRONMENT ALONG AND
   AHEAD OF THE STORM CLUSTER REMAINS MODERATELY UNSTABLE WITH MIXED
   LAYER CAPE OF 1500-2000 J/KG...WHICH SHOULD CONTINUE TO SUPPORT
   VIGOROUS NEW UPDRAFTS ALONG THE LEADING EDGE OF THE ADVANCING COLD
   POOL.  THESE MAY BE ACCOMPANIED BY LARGE HAIL.  WHILE...PEAK WINDS
   ALONG THE DEVELOPING GUST FRONT MAY MOSTLY RANGE FROM 35-40 KT...A
   FEW LOCALIZED GUSTS COULD AT LEAST APPROACH SEVERE CRITERIA.
   
   ..KERR.. 05/10/2009
   
   
   ATTN...WFO...JAN...
   
   LAT...LON   32929026 33118987 33028909 32508856 32158867 31858897
               31818990 32229066 32929026