MESOSCALE DISCUSSION 0704
   NWS STORM PREDICTION CENTER NORMAN OK
   0621 PM CDT MON MAY 04 2009
   
   AREAS AFFECTED...ERN SD AND NCNTRL NEB
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 042321Z - 050045Z
   
   MEDICINE BOW WY PROFILER AND WATER VAPOR IMAGERY CLEARLY SHOW A
   MID-LVL JET MAX OF 50+ KTS DIGGING SEWD INTO SWRN SD/NERN WY ALONG
   SRN PERIPHERY OF THE VORT MAX OVER SWRN ND.  LEFT-EXIT REGION ASCENT
   HAS CONTRIBUTED TO THE DEEPENING CONVECTION OVER CNTRL SD/NCNTRL NEB
   LATE THIS AFTN...INVOF SFC TROUGH.  OBJECTIVE ANALYSIS SUGGESTS A
   VERY NARROW TONGUE OF SBCAPE OF A FEW HUNDRED J/KG AMIDST BULK SHEAR
   OF 25-30 KTS.  PARCEL TRAJECTORY FROM THE STEEP MID-LEVEL LAPSE RATE
   ENVIRONMENT WILL BOOST UPDRAFT STRENGTH AND A COUPLE OF STRONGER
   STORMS MAY PRODUCE MARGINALLY SVR HAIL AND GUSTY WINDS.  A WW IS NOT
   ANTICIPATED...HOWEVER GIVEN THE MARGINALITY AND ISOLD NATURE TO THE
   SVR POTENTIAL.
   
   ..RACY.. 05/04/2009
   
   
   ATTN...WFO...FSD...OAX...ABR...LBF...UNR...
   
   LAT...LON   41930045 43809931 45749947 45579863 43939786 42759800
               41729949 41930045