MESOSCALE DISCUSSION 0607
   NWS STORM PREDICTION CENTER NORMAN OK
   0835 PM CDT TUE APR 26 2011
   
   AREAS AFFECTED...SRN IN...PORTIONS OF NRN KY
   
   CONCERNING...TORNADO WATCH 219...
   
   VALID 270135Z - 270230Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 219 CONTINUES.
   
   SVR THREAT ACROSS SRN IND AND FAR NRN KY REMAINS QUITE CONDITIONAL
   ATTM...AS THE ENVIRONMENT REMAINS MARGINALLY UNSTABLE AND SFC FLOW
   RATHER WEAK. WITH THE LOSS OF DIABATIC HEATING...AND SHORTWAVE
   RIDGING OVERHEAD...CONVECTION HAS BEEN SUPPRESSED OVER MUCH OF THE
   WW AREA /WITH EXCEPTION TO LEFT SPLITTING STORM THAT MOVED N ACROSS
   THE AREA...AND RIGHT-MOVING SUPERCELL NEAR THE OH RIVER VALLEY NOW
   OVER N-CNTRL KY/. CONVECTION S OF THE WATCH AREA IS EXPECTED TO
   APPROACH THE OH RIVER VALLEY WITHIN THE NEXT FEW HRS. THIS SCENARIO
   IS SUPPORTED BY HIGH-RESOLUTION MODELS /INCLUDING WRF-NMM AND
   EXPERIMENTAL HRRR GUIDANCE/...WHICH INDICATE THUNDERSTORMS WILL
   CONTINUE TO DEVELOP NWD NEAR 03Z NEAR SRN PORTIONS OF THE WATCH
   AREA...WITH ACCOMPANYING SVR AND/OR TOR POTENTIAL POSSIBLE. THIS MAY
   REQUIRE AN ADDITIONAL WW LATER TONIGHT.
   
   ..ROGERS.. 04/27/2011
   
   
   ATTN...WFO...ILN...LMK...IND...PAH...ILX...
   
   LAT...LON   37728847 40148725 40098445 37698578 37728847