MESOSCALE DISCUSSION 0170
   NWS STORM PREDICTION CENTER NORMAN OK
   0848 PM CST FRI FEB 27 2009
   
   AREAS AFFECTED...SERN AR/NRN MS/NWRN AL
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 280248Z - 280445Z
   
   ELEVATED CONVECTION CONTINUES TO SLOWLY INCREASE ACROSS THE
   DISCUSSION AREA.  WW MAY BE REQUIRED.
   
   LATEST RADAR IMAGERY SHOWS SHOWERS AND THUNDERSTORMS INCREASING FROM
   THE SERN QUARTER OF AR ENEWD ACROSS NRN MS INTO NRN AL...WITH ZONE
   OF INCREASING QG FORCING N OF A W-E SURFACE BOUNDARY STILL SHIFTING
   SWD ACROSS NRN LA/CENTRAL MS/SRN AL.  AREA VWP/PROFILER DATA AND
   EVENING RAOBS SUGGEST THAT STORMS ARE BASED INVOF 850 MB...WITHIN
   ENVIRONMENT OF MODEST ELEVATED INSTABILITY.  WHILE NOT PARTICULARLY
   IMPRESSIVE THERMODYNAMICALLY...MID-LEVEL FLOW OF 50 KT ACROSS THIS
   REGION IS RESULTING IN SUFFICIENT CLOUD-LAYER SHEAR FOR
   ORGANIZED/SEVERE STORMS.  ATTM...IT APPEARS THAT A SLOW/STEADY
   INCREASE IN STORM COVERAGE/INTENSITY -- AND AN ASSOCIATED INCREASE
   IN HAIL POTENTIAL -- COULD WARRANT NEW WW ISSUANCE.
   
   ..GOSS.. 02/28/2009
   
   
   ATTN...WFO...BMX...HUN...MEG...JAN...LZK...
   
   LAT...LON   33329120 34059260 34539227 35009008 35048822 34688649
               33688687 33818987 33329120