MESOSCALE DISCUSSION 0913
   NWS STORM PREDICTION CENTER NORMAN OK
   0750 PM CDT MON MAY 23 2011
   
   AREAS AFFECTED...SWRN OK THROUGH NWRN TX
   
   CONCERNING...TORNADO WATCH 345...
   
   VALID 240050Z - 240145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 345 CONTINUES.
   
   SUPERCELLS ARE IN THE PROCESS OF RAPIDLY DIMINISHING FROM SWRN OK
   INTO NWRN TX. ADDITIONAL THUNDERSTORM DEVELOPMENT APPEARS UNLIKELY
   IN THIS AREA THE REMAINDER OF THE EVENING...AND LAST TWO ROWS OF
   COUNTIES IN SWRN OK AND THE REMAINDER OF NWRN TX CAN PROBABLY BE
   REMOVED FROM WW ONCE STORMS DISSIPATE.
   
   THE DISCRETE SUPERCELLS THAT DEVELOPED EARLIER IN THE DAY ALONG THE
   DRYLINE ACROSS WERE PRIMARILY DIURNALLY DRIVEN. RAPIDLY INCREASING
   CONVECTIVE INHIBITION RESULTING FROM A STABILIZING BOUNDARY LAYER AS
   WELL AS SHORTWAVE RIDGING ALOFT SUGGEST THAT ADDITIONAL DEVELOPMENT
   IS UNLIKELY THIS EVENING OVER SWRN OK INTO NWRN TX.
   
   STORMS WILL LIKELY CONTINUE DEVELOPING HOWEVER ACROSS NRN OK WHERE A
   STRONG SLY LLJ WILL MAINTAIN CONVERGENCE AND ISENTROPIC LIFT ALONG
   AN OUTFLOW BOUNDARY. SOME OF THIS ACTIVITY MIGHT EVENTUALLY BECOME
   FORWARD PROPAGATING AND ADVANCE SEWD INTO CNTRL OK.
   
   ..DIAL.. 05/24/2011
   
   
   ATTN...WFO...FWD...OUN...
   
   LAT...LON   34859939 34729788 34159763 33639803 33479902 33989968
               34859939