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Mesoscale Discussion 1606
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   MESOSCALE DISCUSSION 1606
   NWS STORM PREDICTION CENTER NORMAN OK
   0939 PM CDT SAT AUG 23 2014

   AREAS AFFECTED...SD

   CONCERNING...TORNADO WATCH 474...

   VALID 240239Z - 240345Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 474 CONTINUES.

   SUMMARY...TORNADO WATCH WILL LIKELY EXPIRE AS SCHEDULED AT 03Z.

   DISCUSSION...EARLY SUPERCELL STRUCTURES THAT FORMED ACROSS SRN
   PORTIONS OF WW474 HAVE LIFTED NORTH OF WARM FRONT AND MERGED INTO A
   MORE LINEAR BAND OF CONVECTION OVER SRN ND.  THIS ACTIVITY IS SLOWLY
   EXPANDING INTO A MORE ORGANIZED MCS AND SHOULD SPREAD NEWD WITHIN
   WARM ADVECTION ZONE ACROSS SERN ND.  LOCALLY DAMAGING WINDS MAY BE
   NOTED ALONG BOWING STRUCTURE ACROSS RANSOM/SARGENT COUNTIES ND.

   FARTHER SOUTH...EXPANDING CLUSTER OF THUNDERSTORMS IS LIFTING NNEWD
   ACROSS SCNTRL SD TOWARD THE SERN PORTIONS OF TORNADO WATCH.  THIS
   SRN ACTIVITY APPEARS TO BE AIDED IN PART BY LARGE SCALE FORCING THAT
   IS NOW SPREADING INTO THE CNTRL PLAINS.  WHILE ISOLATED LARGE HAIL
   MAY BE NOTED WITH THESE STORMS NEW WW DOES NOT APPEAR WARRANTED AT
   THIS TIME.

   ..DARROW.. 08/24/2014


   ATTN...WFO...ABR...

   LAT...LON   45879954 45879729 44649730 44659954 45879954 

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Page last modified: August 24, 2014
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