MESOSCALE DISCUSSION 0558
   NWS STORM PREDICTION CENTER NORMAN OK
   1004 AM CDT TUE APR 24 2007
   
   AREAS AFFECTED...WRN AND CENTRAL KS...WRN AND CENTRAL OK
   
   CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY 
   
   VALID 241504Z - 241700Z
   
   SEVERE/TORNADO THREAT WILL CONTINUE SLOWLY INCREASING THROUGH THIS
   MORNING/AFTERNOON.  TORNADO WATCHES WILL LIKELY BE REQUIRED IN THE
   NEXT 1-2 HOURS -- LIKELY FIRST IN KS AND THEN SWD INTO OK.
   
   LATEST VISIBLE SATELLITE IMAGERY SHOWS SOME BREAKS IN THE CLOUD
   SHIELD JUST AHEAD OF THE COLD FRONT...WHICH IS NOW MOVING ACROSS
   SWRN KS/WRN OK.  HEATING WILL CONTINUE TO SLOWLY INCREASE...WHICH
   WILL PUSH MEAN-LAYER CAPE INTO THE 1500 TO 2000 J/KG RANGE GIVEN
   MOIST BOUNDARY LAYER IN PLACE /LOW TO MID 60S DEWPOINTS/.
   
   WHILE DEEP-LAYER WIND FIELD WILL REMAIN SOMEWHAT
   MERIDIONAL...STRENGTH OF FLOW WILL YIELD DEEP-LAYER SHEAR SUFFICIENT
   FOR SUPERCELLS.  AS CLOUDS SLOWLY ERODE AND INSTABILITY CREEPS
   UPWARD...AND HEIGHT FALLS CONTINUE TO SHIFT GRADUALLY EWD AHEAD OF
   UPPER TROUGH...EXPECT A SLOW INCREASE IN SEVERE THREAT WITH TIME --
   INCLUDING THE POTENTIAL FOR LARGE HAIL AND LOCALLY-DAMAGING WINDS
   ALONG WITH A FEW TORNADOES.
   
   ..GOSS.. 04/24/2007
   
   
   ATTN...WFO...TSA...TOP...ICT...OUN...GID...DDC...GLD...
   
   38950200 39740011 39639743 37859685 35699709 34029791
   34199965 36479922 37640067 37880197