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Mesoscale Discussion 1083
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   MESOSCALE DISCUSSION 1083
   NWS STORM PREDICTION CENTER NORMAN OK
   0611 PM CDT FRI JUN 14 2013

   AREAS AFFECTED...ERN NEB INTO EXTREME WRN IA

   CONCERNING...TORNADO WATCH 313...

   VALID 142311Z - 150045Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 313 CONTINUES.

   SUMMARY...THREAT FOR ISOLATED TORNADOES...LARGE HAIL AND DAMAGING
   WIND PERSIST ACROSS ERN NEB INTO EXTREME WRN IA. GREATEST SEVERE
   THREAT INCLUDING POTENTIAL FOR ISOLATED TORNADOES WILL LIKELY EXIST
   OVER ECNTRL NEB THROUGH 01Z.

   DISCUSSION...CLUSTER OF STORMS THAT DEVELOPED OVER SCNTRL NEB ARE
   FORWARD PROPAGATING ALONG THE NERN EXTENSION OF THE ATTENDANT
   OUTFLOW BOUNDARY. THESE STORMS HAVE PREVIOUSLY BEEN HIGH BASED...BUT
   ARE NOW MOVING INTO AN ENVIRONMENT ACROSS ERN NEB WHERE DEWPOINTS
   NEAR 70 ARE SUPPORTING STRONG INSTABILITY /2000-3000 J/KG MLCAPE/
   AND LOWER LCLS. SFC ANALYSIS AND RADAR DATA INDICATE PRESENCE OF A
   NNW-SSE ORIENTED FRONT/BOUNDARY ACROSS ERN NEB...AND VWP DATA SHOW
   SUFFICIENTLY LARGE HODOGRAPHS IN THE 0-2 KM LAYER WITH 200 M2/S2
   STORM RELATIVE HELICITY. STORMS WILL DEVELOP INTO AN INCREASINGLY
   FAVORABLE ENVIRONMENT FOR SUPERCELLS AND LOW LEVEL MESOSCYCLONES
   ACROSS ERN NEB NEXT COUPLE HOURS WITH AN ATTENDANT THREAT FOR
   ISOLATED TORNADOES AND LARGE HAIL...ESPECIALLY IF STORMS CAN
   MAINTAIN DISCRETE OR SEMI-DISCRETE STRUCTURES.

   ..DIAL.. 06/14/2013


   ATTN...WFO...FSD...OAX...GID...

   LAT...LON   40149715 41019787 42469812 42749741 42179616 41089556
               40149599 40149715 

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