MESOSCALE DISCUSSION 0584
   NWS STORM PREDICTION CENTER NORMAN OK
   0241 PM CDT SUN APR 26 2009
   
   AREAS AFFECTED...WRN IA...ERN NEB AND ERN KS
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 261941Z - 262215Z
   
   THIS DISCUSSION CONCERNS SVR TSTM WATCH 189 AND TORNADO WATCHES 190;
   191.
   
   19Z SFC ANALY SHOWS 2-3 MB PRESSURE FALLS CENTERED OVER ERN KS. 
   MESOLOW CONTINUES TO MIGRATE SLOWLY NEWD ALONG THE NEB-KS BORDER NW
   OF KMHK.  WRMFNT HAS DEVELOPED N OF I-80 WITH A BROAD WARM SECTOR
   CHARACTERIZED BY CAPES RANGING FROM 1000 IN SRN IA TO 2000 J/KG IN
   ERN KS.  HBR PROFILER...RESIDING IN INFLOW REGION OF THE SFC
   LOW...EXHIBITS OVER 225 M2/S2 OF 0-1KM SRH AND 50+ KTS OF BULK
   SHEAR.  WITH MINIMAL CINH NOTED ACROSS THE REGION...TSTMS WILL
   CONTINUE TO DEVELOP AND SLOWLY TRANSLATE ENE ACROSS THE DISCUSSION
   AREA THRU LATE AFTN.
   
   CONVECTIVE MODE WILL CONTINUE TO BE MESSY WITH NUMEROUS STORMS BEING
   GENERATED WITH VARIOUS COMPLEX MERGERS. OBVIOUSLY... MAGNITUDE OF
   SHEAR AND INSTABILITY WILL REMAIN CONDUCIVE FOR HIGH PCPN SUPERCELLS
   CAPABLE OF STRONG TORNADOES...LARGE HAIL AND DESTRUCTIVE WIND GUSTS.
   THIS WILL ESPECIALLY BE TRUE ACROSS ERN KS SWD WHERE BEST
   JUXTAPOSITION OF RICH MOISTURE INFLUX AND SHEAR WILL EXIST. 
   HOWEVER...FARTHER N...INSTABILITY GRADIENT WILL DEVELOP NWD WITH
   TIME AND TORNADOES...DMGG WINDS AND HAIL RISKS WILL SPREAD ACROSS
   CNTRL/NRN IA THROUGH EARLY EVENING.  
   
   FINALLY...THERE WILL BE A LARGE HAIL THREAT ACROSS ERN NEB AND NWRN
   IA AS LEFT-SPLITS OF SUPERCELLS DEVIATE AND MOVE ATOP THE COLDER
   BOUNDARY LAYER.
   
   ..RACY.. 04/26/2009
   
   
   ATTN...WFO...DMX...EAX...FSD...OAX...TOP...ICT...GID...DDC...
   
   LAT...LON   40939414 40369485 38569604 37579682 37109749 37279930
               39489820 40179760 42319685 43389557 43279360 42499299
               40939414