MESOSCALE DISCUSSION 0511
   NWS STORM PREDICTION CENTER NORMAN OK
   0947 AM CDT SAT APR 18 2009
   
   AREAS AFFECTED...PORTIONS E-CENTRAL/SE TX.
   
   CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON 
   
   VALID 181447Z - 181515Z
   
   TORNADO WW WILL BE ISSUED WITHIN MOMENTS FOR EMBEDDED/SMALL
   SUPERCELLS DEVELOPING AND TIGHTENING CIRCULATIONS RAPIDLY WITHIN
   BROAD AREA OF RAIN AND TSTMS OVER DISCUSSION AREA.  WW WILL PARTLY
   OVERLAP/REPLACE ERN PORTIONS WW 164.
   
   ..EDWARDS.. 04/18/2009
   
   
   ATTN...WFO...LCH...SHV...HGX...FWD...
   
   LAT...LON   29539440 28749564 28639626 29599645 30879645 31979587
               32269536 32269489 31999435 31279416 29539440