MESOSCALE DISCUSSION 0572
   NWS STORM PREDICTION CENTER NORMAN OK
   0958 PM CDT SAT APR 25 2009
   
   AREAS AFFECTED...PORTIONS WRN/NRN OK...CENTRAL/ERN KS.
   
   CONCERNING...TORNADO WATCH 183...
   
   VALID 260258Z - 260430Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 183 CONTINUES.
   
   SEVERAL SUPERCELLS STILL EVIDENT WITHIN WW AREA...WITH MIXED TRENDS
   IN BOTH STORM INTENSITY AND ENVIRONMENTAL PARAMETERS.  POTENTIALLY
   TORNADIC SUPERCELL NOTED INVOF ENID...STRENGTHENING STORM IS
   ENTERING SRN MAJOR COUNTY.  MEANWHILE STEADY TO DECREASING
   SUPERCELLS ARE EVIDENT NEAR AND S OF I-40 OVER WRN OK AND WITHIN
   MESSY STORM MODES OVER S-CENTRAL/SERN KS.
   
   OVER WW AREA IN GENERAL...TORNADO POTENTIAL MAY HAVE PEAKED...BUT
   CANNOT BE CONSIDERED FINISHED YET.  DIABATIC SFC COOLING IS LEADING
   TO INCREASED MLCINH -- ESTIMATED AT 50-100 J/KG ATTM OVER MOST OF WW
   AREA BASED ON MODIFIED RAOBS AND RUC SOUNDINGS.  HOWEVER...EFFECTIVE
   LIFTED PARCELS REMAIN ROOTED AT OR VERY NEAR SFC...AND STRENGTHENING
   LLJ CONTINUES TO ENLARGE LOW LEVEL HODOGRAPHS...KEEPING 0-1 KM SRH
   250-450 J/KG FOR ANY INTENSE/ROTATING UPDRAFTS THAT CAN TAP
   FAVORABLY MOIST AIR MASS WITHIN THAT LAYER.  WW IS SCHEDULED TO
   EXPIRE AT 04Z...BUT PORTIONS OF THIS REGION MAY REQUIRE ADDITIONAL
   WW ISSUANCE BEFORE THEN.
   
   FARTHER N...ACROSS CENTRAL/NRN KS...THOSE PORTIONS OF 40-50 KT LLJ 
   THAT ARE MOVING AROUND OK/SRN KS CONVECTION WILL SUPPLY FAVORABLE
   MOISTURE...WITHIN STG/ELEVATED WAA REGIME.  ELEVATED MUCAPE
   1000-1500 J/KG WITH 30-40 KT EFFECTIVE SHEAR WILL BE FAVORABLE FOR 
   LARGE HAIL WITH MOST INTENSE TSTMS.
   
   ..EDWARDS.. 04/26/2009
   
   
   ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...GID...DDC...
   
   LAT...LON   38959503 37009508 37039602 36219600 36179714 35819766
               35349769 35399812 35329928 36259983 37269830 37989837
               39209893 39919787 39899621 38959503