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Mesoscale Discussion 1272
MD 1272 graphic
   
   MESOSCALE DISCUSSION 1272
   NWS STORM PREDICTION CENTER NORMAN OK
   0342 PM CDT MON JUN 09 2003
   
   AREAS AFFECTED...PARTS OF WRN AND CNTRL NEB
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 092042Z - 092245Z
   
   SEVERE THREAT IS INCREASING ACROSS CENTRAL NEBRASKAA AND NEW WW MAY
   BE NEEDED WITHIN THE NEXT HOUR OR SO.
   
   SURFACE TEMPERATURES WARMING INTO THE LOWER 90S HAVE SUPPORTED
   CONVECTIVE INITIATION ALONG DRY LINE ACROSS WESTERN NEBRASKAA...
   WHERE LOW-LEVEL CONVERGENCE IS ENHANCED TO THE SOUTH OF WEAK SURFACE
   LOW.  ACTIVITY APPEARS LIKELY TO INCREASE/INTENSIFY WITH ADDITIONAL
   HEATING/STRENGTHENING CONVERGENCE NEXT FEW HOURS...DEVELOPING INTO
   AREAS NEAR/EAST OF NORTH PLATTE...WHERE ENVIRONMENT IS MODERATELY
   UNSTABLE WITH MEAN MIXED LAYER CAPE IN EXCESS OF 2000 J/KG.  ON
   SOUTHERN FRINGE OF MID-LEVEL WESTERLY JET NOSING INTO THE NORTH
   CENTRAL HIGH PLAINS...10 TO 20 KT LOW-LEVEL WINDS VEERING WITH
   HEIGHT ARE CONTRIBUTING TO SUFFICIENT VERTICAL SHEAR PROFILES FOR
   SUPERCELLS...WITH POTENTIAL FOR VERY LARGE HAIL/DAMAGING WIND GUSTS.
    ACTIVITY WILL LIKELY EVOLVE INTO GROWING CONVECTIVE CLUSTER ACROSS
   CENTRAL NEBRASKA VICINITY OF BROKEN BOW BY THE EARLY EVENING
   HOURS... BEFORE WEAKENING WITH ONSET OF RADIATIONAL COOLING AND
   STRENGTHENING LOW/MID-LEVEL CAP.
   
   ..KERR.. 06/09/2003
   
   
   ATTN...WFO...GID...LBF...
   
   41200154 41570138 42030050 41829909 41309859 40689905
   40610103 
   
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