MESOSCALE DISCUSSION 0468
   NWS STORM PREDICTION CENTER NORMAN OK
   0852 PM CDT TUE APR 26 2016

   AREAS AFFECTED...PORTIONS OF CNTRL/ERN OK AND N-CNTRL INTO CNTRL TX

   CONCERNING...TORNADO WATCH 109...

   VALID 270152Z - 270245Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 109 CONTINUES.

   SUMMARY...PRIMARY THREAT ACROSS WW 109 HAS TRANSITIONED TO DAMAGING
   WINDS...WITH A SECONDARY THREAT OF MARGINALLY SEVERE HAIL AND
   PERHAPS AN ISOLATED TORNADO EMBEDDED WITHIN THE SQUALL LINE.

   DISCUSSION...AN EXTENSIVE MCS EXTENDS FROM S-CNTRL KS ACROSS ALL OF
   CNTRL OK AND CONTINUES SWD TO PORTIONS OF CNTRL TX. MODIFYING THE
   00Z SOUNDING FROM OUN FOR CURRENT SFC CONDITIONS SUGGESTS MLCAPE ON
   THE ORDER OF 2500-3000 J/KG IS PRESENT ACROSS CNTRL OK...WHICH WILL
   CONTINUE TO SUPPORT WIDESPREAD STRONG TO DAMAGING WINDS ACROSS MUCH
   OF CNTRL OK. FURTHER S ACROSS PORTIONS OF N-CNTRL INTO CNTRL
   TX...THE LINE ACRS SWWD...AND THE AIRMASS DOWNSTREAM ALSO REMAINS
   STRONGLY UNSTABLE PER THE 00Z FWD SOUNDING. EMBEDDED MESOVORTICES
   WITHIN THE LINE MAY BE CAPABLE OF PRODUCING A BRIEF/ISOLATED TORNADO
   WITH 0-1 SRH IN EXCESS OF 250 M2/S2 PER KTLX AND KFWD VWPS. ANY
   SUPERCELL THAT CAN FORM AHEAD OF THE MCS WOULD HAVE A BETTER CHANCE
   OF PRODUCING A TORNADO...SUCH AS THE CELL IN COOKE COUNTY TX AS OF
   0145Z.

   ..GLEASON.. 04/27/2016


   ATTN...WFO...TSA...FWD...OUN...SJT...

   LAT...LON   31110065 31079847 31819674 32379602 33049582 35489502
               36909534 36879778 35359814 33659844 32499932 31990038
               31110065