MESOSCALE DISCUSSION 0516
   NWS STORM PREDICTION CENTER NORMAN OK
   0951 PM CDT MON MAY 10 2010
   
   AREAS AFFECTED...SRN-ERN OK...WRN AR...EXTREME NORTH TX
   
   CONCERNING...TORNADO WATCH 149...150...
   
   VALID 110251Z - 110345Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 149...150...CONTINUES.
   
   SCATTERED SEVERE THUNDERSTORMS...MOSTLY SUPERCELLULAR...CONTINUE
   FROM NWRN AR...SWWD ACROSS OK INTO NCNTRL TX.  THIS ACTIVITY
   ORIGINATED WITHIN VERY UNSTABLE AIRMASS ALONG/AHEAD OF DRYLINE THAT
   HAS RECENTLY STALLED.  ALTHOUGH DIURNAL COOLING AND BOUNDARY LAYER
   DECOUPLING SHOULD BEGIN TO IMPEDE UPDRAFT STRENGTH...VERY STRONG
   SHEAR WILL LIKELY DELAY THIS PROCESS FOR SEVERAL HOURS AS INTERNAL
   SUPERCELL PROCESSES ARE QUITE MATURE AND WILL TAKE SOME TIME TO
   DEVOLVE.  NEEDLESS TO SAY...TORNADO THREAT WILL CONTINUE UNTIL
   UPDRAFTS BECOME ELEVATED AND WEAKEN.
   
   ..DARROW.. 05/11/2010
   
   
   ATTN...WFO...LZK...SHV...TSA...FWD...OUN...
   
   LAT...LON   33519773 34579562 36019389 35609337 33889458 33269672
               33519773