MESOSCALE DISCUSSION 1567
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 PM CDT SUN JUL 10 2011
   
   AREAS AFFECTED...SERN SD / FAR NERN NEB / NWRN IA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 110445Z - 110545Z
   
   TSTMS MAY INCREASE IN COVERAGE AND INTENSITY ACROSS DISCUSSION AREA
   DURING THE OVERNIGHT HOURS AND CONVECTIVE TRENDS ARE BEING MONITORED
   FOR A POSSIBLE WW.
   
   LATEST MESOANALYSIS SHOWED THAT OUTFLOW BOUNDARY TRAILING FROM SRN
   MN MCS HAS NOW SETTLED S OF THE I-90 CORRIDOR IN SERN SD WHERE IT
   INTERSECTS A WEAK PRE-FRONTAL TROUGH EXTENDING SWWD THROUGH PART OF
   N-CNTRL NEB BETWEEN ANW AND ONL.  FARTHER SW...ANOTHER BOWING MCS
   WAS MOVING RAPIDLY NEWD TOWARD THE AREA.  
   
   RECENT TRENDS IN RADAR DATA SHOW THAT TSTMS ARE DEVELOPING BETWEEN
   THE TWO MESOSCALE CONVECTIVE SYSTEMS ALONG THE MO RIVER W OF YKN. 
   THE CONTINUED STRENGTHENING OF A NOCTURNAL LLJ WILL SERVE TO ENHANCE
   CONVERGENCE ALONG ABOVE-MENTIONED BOUNDARIES...LIKELY RESULTING IN
   AN INCREASE IN STORM COVERAGE OVER THE NEXT ONE TO TWO HOURS.  GIVEN
   THE VERY MOIST AND UNSTABLE AIR MASS IN PLACE...STORMS SHOULD
   RAPIDLY INTENSIFY WITH ATTENDANT THREATS FOR HAIL AND DAMAGING
   WINDS.
   
   ..MEAD.. 07/11/2011
   
   
   ATTN...WFO...DMX...FSD...OAX...
   
   LAT...LON   42549736 43329720 43699614 43139537 42349519 41959572
               42149680 42549736