MESOSCALE DISCUSSION 0578
   NWS STORM PREDICTION CENTER NORMAN OK
   0524 PM CDT MON APR 25 2011
   
   AREAS AFFECTED...ERN TX PANHANDLE...SWRN AND S-CNTRL OK
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 252224Z - 252330Z
   
   ISOLATED THUNDERSTORMS...WITH SOME CAPABLE OF PRODUCING SVR
   HAIL...HAVE DEVELOPED ACROSS THE TX PANHANDLE AND INTO WRN OK.
   HOWEVER...THE THREAT IS EXPECTED TO REMAIN TOO DISCRETE/MARGINAL TO
   WARRANT A WW.
   
   PROMINENT UPPER VORT /EVIDENT ON RECENT WATER VAPOR IMAGERY/ HAS
   SHIFTED INTO CNTRL OK...WITH A WEAK TRAILING IMPULSE MOVING ACROSS
   NERN NM. THIS HAS AIDED IN INITIATING CONVECTION ACROSS PORTIONS OF
   THE ERN TX PANHANDLE AND WRN OK AS COLD MIDLEVEL TEMPS /-18 TO -20
   C/ HAVE YIELDED A MARGINALLY UNSTABLE ENVIRONMENT. STEEP MIDLEVEL
   LAPSE RATES...ALONG WITH MODERATELY STRONG EFFECTIVE BULK SHEAR
   AROUND 35 KTS...WILL CONTINUE TO SUPPORT THE POTENTIAL FOR SVR HAIL
   WITH THE STRONGEST STORMS. THUNDERSTORM COVERAGE IS EXPECTED TO
   DECREASE LATER THIS EVENING WITH THE LOSS OF DIABATIC HEATING.
   
   ..ROGERS.. 04/25/2011
   
   
   ATTN...WFO...OUN...LUB...AMA...
   
   LAT...LON   34079767 34249948 34630113 34890164 35260170 35760141
               36060088 36059951 35829849 35549755 35379698 34909696
               34449719 34079767