MESOSCALE DISCUSSION 0406
   NWS STORM PREDICTION CENTER NORMAN OK
   1122 PM CDT MON APR 08 2013
   
   AREAS AFFECTED...NORTHEAST CO...PARTS OF NEB
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 090422Z - 090545Z
   
   CORRECTED FOR ADDITIONAL TEXT
   
   PROBABILITY OF WATCH ISSUANCE...20 PERCENT
   
   SUMMARY...A CORRIDOR OF STRONG/SEVERE STORMS EXTENDS FROM NORTHEAST
   CO ACROSS CENTRAL NEB.  MOST OF THESE STORMS ARE NORTH OF A COLD
   FRONT MOVING SOUTHWARD ACROSS THE REGION.  MARGINALLY SEVERE HAIL
   APPEARS TO BE THE MAIN THREAT.
   
   DISCUSSION...NUMEROUS THUNDERSTORMS ARE OCCURRING ALONG AN AXIS FROM
   NORTHEAST CO...THROUGH SOUTHWEST AND CENTRAL NEB...TO NORTH OF OMA. 
   ALMOST ALL OF THESE STORMS ARE NOW NORTH OF A SAGGING COLD
   FRONT...SEPARATING MOIST AND MODERATELY UNSTABLE AIR TO THE
   SOUTH...AND RAPIDLY COOLING SURFACE TEMPERATURES TO THE NORTH. 
   DESPITE THE CONTINUED SUPERCELL STORM STRUCTURES...THE ACTIVITY IS
   EXPECTED TO MOVE INTO THE PROGRESSIVELY DEEPER COLD AIRMASS WITH
   MARGINALLY SEVERE HAIL BEING THE PRIMARY THREAT.
   
   ONE EXCEPTION WOULD BE THE STORM IN HITCHCOCK COUNTY NEB.  THIS
   STORM IS VERY NEAR THE SURFACE BOUNDARY AND HAS A HISTORY OF VERY
   STRONG LOW LEVEL CIRCULATION SIGNATURES.  HOWEVER...EVEN THIS STORM
   WILL LIKELY BE UNDERCUT BY THE FRONT WITHIN THE NEXT HOUR.
   
   DUE TO THE MARGINAL NATURE OF THE HAIL THREAT...A WATCH IS UNLIKELY
   AT THIS TIME.  ONE SCENARIO THAT MIGHT REQUIRE ACTION WOULD BE IF
   STORMS COULD BEGIN TO FORWARD-PROPAGATE AND TRACK ALONG THE BOUNDARY
   ACROSS SOUTHERN NEB.
   
   ..HART/DIAL.. 04/09/2013
   
   
   ATTN...WFO...OAX...GID...LBF...GLD...BOU...
   
   LAT...LON   40860265 41339998 42109759 42139616 41499552 41159593
               41189712 40809906 40030106 39790231 39910327 40490339
               40860265