MESOSCALE DISCUSSION 1728
   NWS STORM PREDICTION CENTER NORMAN OK
   0635 PM CDT SUN JUL 24 2011
   
   AREAS AFFECTED...PARTS OF SERN NEB...N CNTRL/NERN KS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 242335Z - 250030Z
   
   TRENDS ARE BEING MONITORED FOR THE POSSIBILITY OF AN INCREASING
   SEVERE THREAT THAT COULD REQUIRE A WW.
   
   SIGNIFICANT OUTFLOW CONTINUES TO SPREAD AWAY FROM A FAIRLY SMALL BUT
   SUSTAINED STORM NOW NEAR HEBRON NEBRASKA.  BUT...VIGOROUS NEW STORM
   DEVELOPMENT CONTINUES ON ITS EASTERN FLANK...LIKELY DRIVEN BY
   ENHANCED WARM ADVECTION NEAR THE INTERSECTION OF A RESIDUAL OUTFLOW
   BOUNDARY EXTENDING SOUTHEASTWARD INTO NORTHEAST KANSAS.  THE MOIST
   AIR MASS ALONG AND NORTH OF THIS BOUNDARY DOES APPEAR CHARACTERIZED
   BY LARGE CAPE...WITH EASTERLY AMBIENT NEAR SURFACE WINDS
   CONTRIBUTING TO MODEST STORM INFLOW BENEATH GENERALLY LIGHT WEST
   NORTHWESTERLY MID/UPPER FLOW.  ACTIVITY DOES NOT APPEAR LIKELY TO
   DIMINISH ANY TIME SOON...AND NOCTURNAL STRENGTHENING OF SOUTHERLY
   LOW-LEVEL FLOW ABOVE THE BOUNDARY LAYER COULD ENHANCE WARM ADVECTION
   AND CONTRIBUTE TO UPSCALE GROWTH AFTER SUNSET.  A MERGER WITH STORMS
   NOW DEVELOPING NEAR MANHATTAN ALSO APPEARS POSSIBLE THROUGH 01-02Z. 
   WHILE FREQUENT CLOUD TO GROUND LIGHTNING AND LOCALLY VERY HEAVY
   RAINFALL ARE PROBABLY THE PRIMARY THREATS WITH EXPANDING AND
   GENERALLY SLOW MOVING CONVECTION...LOCALLY STRONG AND POTENTIALLY
   DAMAGING WIND GUSTS MAY NOT BE OUT OF THE QUESTION.
   
   ..KERR.. 07/24/2011
   
   
   ATTN...WFO...EAX...OAX...TOP...GID...
   
   LAT...LON   40669740 40489659 39969581 39519512 39089480 38529513
               38329567 38769648 39049710 39369776 39759812 40149760
               40669740