MESOSCALE DISCUSSION 0796
   NWS STORM PREDICTION CENTER NORMAN OK
   0158 PM CDT TUE MAY 06 2008
   
   AREAS AFFECTED...MUCH OF CNTRL AND WRN NEB...FAR NERN CO
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 061858Z - 062030Z
   
   SEVERE THUNDERSTORMS ARE LIKELY TO DEVELOP BY LATE AFTERNOON ALONG
   AN OUTFLOW BOUNDARY AND WITHIN SURFACE PRESSURE TROUGH. VERY LARGE
   HAIL AND A FEW DAMAGING WIND GUSTS ARE LIKELY.
   
   THE INITIAL CONVECTION OVER SRN SD HAS LAID OUT AN OUTFLOW BOUNDARY
   AND REINFORCED THE WARM FRONT ACROSS NRN NEB AND SWRN SD.
   MEANWHILE...SURFACE ANALYSIS SHOWS WIND SHIFT/DRYLINE OVER WRN NEB.
   
   VISIBLE IMAGERY INDICATES CU FORMING IN THE VICINITY OF THE OUTFLOW
   BOUNDARY ACROSS CHERRY COUNTY NEB...WITH MID LEVEL CONVECTION ALONG
   A LINE FROM SNY TO JUST S OF ONL. 18Z LBF SOUNDING INDICATES SURFACE
   BASED INITIATION WILL BE POSSIBLE WITH TEMPERATURES NEAR THE UPPER
   70S. GIVEN CURRENT TRENDS...ALL CIN SHOULD BE REMOVED OVER W CNTRL
   NEB BY 19-20Z. STORMS SHOULD RAPIDLY FORM OVER N CNTRL NEB...AND
   BUILD SWWD WITH TIME. VERY STEEP LAPSE RATES AND STRONG INSTABILITY
   COUPLED WITH VEERING AND INCREASING WIND SPEEDS WITH HEIGHT WILL
   FAVOR A FEW SUPERCELLS CAPABLE OF VERY LARGE HAIL. MOST OF THE
   STORMS SHOULD BE PROFICIENT AT PRODUCING OUTFLOW SHORTLY AFTER
   INITIATION...WITH DAMAGING WINDS ALSO POSSIBLE.
   
   ..JEWELL.. 05/06/2008
   
   
   ATTN...WFO...OAX...GID...LBF...UNR...GLD...BOU...CYS...
   
   40630364 41020336 41970240 42930207 43490199 43510128
   43150086 42750031 42529973 42229866 41709773 40660030
   40250176 40090272 40210341