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Mesoscale Discussion 831
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   MESOSCALE DISCUSSION 0831
   NWS STORM PREDICTION CENTER NORMAN OK
   0839 PM CDT MON MAY 27 2013

   AREAS AFFECTED...CNTRL NEB

   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 

   VALID 280139Z - 280315Z

   PROBABILITY OF WATCH ISSUANCE...20 PERCENT

   SUMMARY...MARGINAL SEVERE HAIL/WIND RISK MAY PERSIST TILL AROUND 03Z
   WITH CONVECTION THAT HAS STRENGTHENED RAPIDLY DUE TO THE COLLISION
   OF OUTFLOWS FROM DECAYING HIGH PLAINS CONVECTION AND MCS OVER NERN
   KS/SERN NEB.

   DISCUSSION...OBSERVATIONAL DATA CONFIRM THAT COLLISION OF EWD AND
   WWD-MOVING CONVECTIVE OUTFLOWS OCCURRED IN N/S-ORIENTATION OVER THE
   LBF AREA. DESPITE SUBSTANTIAL MLCIN NOTED IN 00Z LBF RAOB...THIS
   FORCED ASCENT HAS YIELDED RAPID DEVELOPMENT OF A TSTM LINE. REPORTS
   OF QUARTER-SIZE HAIL AND A MEASURED WIND GUST TO 43 KT HAVE OCCURRED
   IN LBF. THIS FLAREUP WILL LIKELY REMAIN SHORT-LIVED AND WITHIN A
   WEAKLY SHEARED ENVIRONMENT NOTED IN KLNX VWP DATA. OVERALL THREAT
   SHOULD REMAIN TOO MARGINAL FOR A NEW WW.

   ..GRAMS/THOMPSON.. 05/28/2013


   ATTN...WFO...GID...LBF...GLD...

   LAT...LON   42440086 42479992 42229968 41819941 41089952 40260043
               40330082 40620086 41370072 42100096 42440086 

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