MESOSCALE DISCUSSION 0374
   NWS STORM PREDICTION CENTER NORMAN OK
   1001 PM CDT THU MAR 29 2007
   
   AREAS AFFECTED...ERN OK/NERN QUARTER OF TX
   
   CONCERNING...TORNADO WATCH 90...
   
   VALID 300301Z - 300500Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 90 CONTINUES.
   
   AIRMASS CONTINUES TO SLOWLY STABILIZE ACROSS WW...AS WIDESPREAD
   THUNDERSTORMS CONTINUE WITHIN BROAD AREA OF WARM ADVECTION ACROSS
   THIS AREA.  THOUGH SHEAR REMAINS SUFFICIENT FOR SUPERCELLS ACROSS WW
   AND WHILE STORMS WILL LIKELY CONTINUE FOR SEVERAL
   HOURS...DIMINISHING INSTABILITY SUGGESTS THAT SEVERE THREAT IS
   DECREASING SLOWLY WITH TIME.
   
   NONETHELESS...GIVEN DEGREE OF SHEAR AND ONGOING STORMS...AN ISOLATED
   TORNADO WILL REMAIN POSSIBLE THIS EVENING...IN ADDITION TO A LIMITED
   POTENTIAL FOR MARGINAL HAIL/LOCALLY-DAMAGING WINDS.  GREATEST THREAT
   OVER THE NEXT COUPLE OF HOURS APPEARS TO EXIST ACROSS NERN
   OK...WHERE GREATEST INSTABILITY REMAINS.
   
   ..GOSS.. 03/30/2007
   
   
   ATTN...WFO...SGF...SHV...TSA...FWD...OUN...
   
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