MESOSCALE DISCUSSION 0682
   NWS STORM PREDICTION CENTER NORMAN OK
   0111 PM CDT MON APR 25 2005
   
   AREAS AFFECTED...PORTIONS OF CENTRAL AND SRN OK
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 251811Z - 251915Z
   
   WW MAY BE REQUIRED FOR PORTIONS OF CENTRAL/SRN OK.
   
   VIS IMAGERY SHOWED CU FIELD DEVELOPING ALONG/EAST OF DRY LINE WHICH
   EXTENDED FROM WRN OK SWD TO NEAR SPS AND THEN SWWD TO JUST EAST OF
   SJT.  SLY LOW LEVEL WINDS IN THE WARM SECTOR WILL CONTINUE TO ADVECT
   MOISTURE NWD...WHILE ADDITIONAL SURFACE HEATING IS EXPECTED TO
   FURTHER WEAKEN THE CAP ACROSS THIS REGION...RESULTING IN
   THUNDERSTORM INITIATION.  COLD MID LEVEL TEMPERATURES /-20 C AT 500
   MB/ ATOP THIS DESTABILIZING BOUNDARY LAYER WILL FURTHER ENHANCE
   INSTABILITY WITH MUCAPE VALUES UP TO 1500 J/KG.  STEEP LAPSE RATES
   OF 7.5-8 C/KM AND STRONG DEEP LAYER SHEAR WILL FAVOR SEVERE
   HAIL...WITH DAMAGING WINDS ALSO A THREAT.
   
   ..PETERS.. 04/25/2005
   
   
   ATTN...WFO...TSA...FWD...OUN...
   
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