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Mesoscale Discussion 386
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   MESOSCALE DISCUSSION 0386
   NWS STORM PREDICTION CENTER NORMAN OK
   0709 PM CDT SUN APR 19 2015

   AREAS AFFECTED...AR...LA

   CONCERNING...TORNADO WATCH 83...

   VALID 200009Z - 200215Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 83 CONTINUES.

   SUMMARY...TORNADO THREAT CONTINUES WITH SUPERCELLS THIS EVENING.

   DISCUSSION...NUMEROUS DISCRETE SUPERCELLS HAVE EVOLVED FROM NORTH TO
   SOUTH AHEAD OF WIND SHIFT ACROSS WW83.  THIS STORM MODE IS SUPPORTED
   IN 00Z SOUNDING FROM LZK WHICH EXHIBITS STEEP SFC-3KM LAPSE
   RATES...AMPLE BUOYANCY AND STRONG DEEP LAYER SHEAR.  AS UPPER TROUGH
   SHIFTS INTO THE MS VALLEY OVER THE NEXT FEW HOURS...STRENGTHENING
   HIGH LEVEL FLOW WITHIN A DIFLUENT FLOW REGIME ALOFT SUGGEST THIS
   ACTIVITY WILL SPREAD DOWNSTREAM EAST OF THE MS RIVER...ESPECIALLY
   NORTH OF I-20.

   ..DARROW.. 04/20/2015


   ATTN...WFO...MEG...JAN...LZK...LCH...SHV...

   LAT...LON   31479415 35729297 35719046 31479177 31479415 

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Page last modified: April 20, 2015
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