MESOSCALE DISCUSSION 0853
   NWS STORM PREDICTION CENTER NORMAN OK
   0405 AM CDT SAT MAY 10 2008
   
   AREAS AFFECTED...FAR EASTERN OK/SOUTHERN MO/MUCH OF AR/SOUTHERN
   IL/WESTERN KY/WESTERN AND MIDDLE TN/NORTHERN AL/MUCH OF GA
   
   CONCERNING...OUTLOOK UPGRADE 
   
   VALID 100905Z - 101100Z
   
   A VERY ACTIVE SEVERE WEATHER DAY IS EXPECTED THIS AFTERNOON AND
   TONIGHT. AN INITIAL /06Z/ MODERATE RISK EXISTS ACROSS MUCH OF THE
   ARKLATEX/MID SOUTH REGION AND CENTRAL GULF COAST STATES. THIS
   MODERATE RISK WILL BE EXPANDED NORTH/EASTWARD WITH THE UPCOMING 13Z
   DAY 1 CONVECTIVE OUTLOOK.
   
   ESPECIALLY REGARDING THE NORTH EXTENT...PRIMARY CONCERN IS THE
   POTENTIAL INTENSIFICATION OF THE MID LEVEL TROUGH LATE TODAY...WITH
   RAPID DEEPENING OF THE SURFACE LOW FROM EASTERN KS INTO THE MIDDLE
   MISSISSIPPI VALLEY TONIGHT. EXPECTED EXPANSION OF THE 13Z MODERATE
   RISK WOULD NOW INCLUDE FAR EASTERN OK/NORTHERN AR/SOUTHERN
   MO/SOUTHERN IL/WESTERN KY/WESTERN AND MIDDLE TN INTO NORTHERN
   AL/MUCH OF GA. A PUBLIC SEVERE WEATHER OUTLOOK /PWO/ WILL BE ISSUED
   SHORTLY.
   
   ..GUYER.. 05/10/2008
   
   
   ATTN...WFO...MRX...FFC...TAE...LMK...OHX...BMX...HUN...PAH...MEG...LSX...LZK...SGF...SHV...TSA...
   
   34688770 35489006 35609296 35129444 32999494 33379512
   35819504 37999141 38188838 37248732 35908613 33538294
   31918293 31918510 33188492