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Mesoscale Discussion 1676
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   MESOSCALE DISCUSSION 1676
   NWS STORM PREDICTION CENTER NORMAN OK
   0746 PM CDT THU AUG 13 2015

   AREAS AFFECTED...CNTRL THROUGH SCNTRL NEB

   CONCERNING...SEVERE THUNDERSTORM WATCH 487...

   VALID 140046Z - 140215Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 487
   CONTINUES.

   SUMMARY...DAMAGING WIND AND LARGE HAIL REMAIN PROBABLE NEXT COUPLE
   HOURS AS CLUSTER OF STORMS MOVES SWD THROUGH CNTRL AND SCNTRL NEB.
   SEVERE THREAT IS EXPECTED TO PERSIST THROUGH 03Z...FOLLOWED BY A
   WEAKENING TREND.

   DISCUSSION...STORMS OVER CNTRL NEB ARE MOVING SWD AT 25-30 KT. A FEW
   SUPERCELL STRUCTURES PERSIST WITHIN AN ENVIRONMENT CHARACTERIZED BY
   30-35 KT EFFECTIVE BULK SHEAR AND MODERATE INSTABILITY BASED ON 00Z
   NORTH PLATTE RAOB. HOWEVER...TREND HAS BEEN FOR STORMS TO MERGE INTO
   A SMALL MCS...AND ACTIVITY WILL LIKELY CONTINUE DEVELOPING SWD NEXT
   FEW HOURS SUPPORTED BY CONVERGENCE ALONG THE OUTFLOW BOUNDARY.
   CONVECTIVE INHIBITION WILL GRADUALLY INCREASE AS THE SFC LAYER
   BEGINS TO COOL WHICH...IN CONJUNCTION WITH ABSENCE OF A LLJ...SHOULD
   PROMOTE A GRADUAL WEAKENING TREND BY 03Z. IN THE MEANTIME...THE
   STRONGER STORMS WILL REMAIN CAPABLE OF PRODUCING DAMAGING WIND AND
   HAIL.

   ..DIAL.. 08/14/2015


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

   LAT...LON   41290113 41690050 41949948 41219940 40759979 40770111
               41290113 

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Page last modified: August 14, 2015
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