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Mesoscale Discussion 1499
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   MESOSCALE DISCUSSION 1499
   NWS STORM PREDICTION CENTER NORMAN OK
   1011 PM CDT MON JUL 20 2015

   AREAS AFFECTED...SERN MO / NERN AR / SRN IL / WRN KY / SWRN IN

   CONCERNING...SEVERE THUNDERSTORM WATCH 445...

   VALID 210311Z - 210415Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 445
   CONTINUES.

   SUMMARY...THE POTENTIAL FOR LOCALLY STRONG TO DAMAGING WIND GUSTS
   WILL PERSIST OVER PARTS OF WRN KY FOR THE NEXT COUPLE OF HOURS. 
   ELSEWHERE...THE SEVERE WEATHER THREAT APPEARS TO BE DIMINISHING
   ACROSS REMAINING VALID PORTIONS OF THE WATCH AREA.

   DISCUSSION...AS OF 03Z...PADUCAH VOLUMETRIC RADAR DATA INDICATED THE
   LEADING EDGE OF A LONGER-DURATION SHORT-SEGMENT BOW OVER WRN HOPKINS
   COUNTY KY WITH AN OBSERVED MOTION OF 270/35 KT.  THIS CONVECTIVE
   STRUCTURE HAS RECENTLY MERGED WITH A CLUSTER OF STORMS MOVING SSEWD
   THROUGH EXTREME SERN IL AND SWRN INDIANA...FORMING A LARGER-SCALE
   ARCING TSTM SEGMENT STRETCHING FROM WRN HOPKINS COUNTY INTO UNION
   COUNTY KY.  THE ORIENTATION OF THIS BOWING COMPLEX OF STORMS HAS
   BECOME NEARLY ORTHOGONAL TO THE WLY DEEP-LAYER WIND FIELD OBSERVED
   BY THE CURRENT WSR-88D VAD AT PADUCAH...SUGGESTING THAT SOME
   POTENTIAL FOR LOCALLY DAMAGING WINDS WILL EXIST WITH THESE STORMS AS
   THEY CONTINUE EWD THROUGH ERN PORTIONS OF THE WATCH AREA.

   FARTHER TO THE SW...A BAND OF TSTMS FROM N OF DYR TO NEAR BVX HAS
   WEAKENED CONSIDERABLY OVER THE PAST HOUR...THOUGH A 58 MPH WIND GUST
   WAS OBSERVED AT 0230Z IN PARAGOULD AR.  EXPECT THIS CONVECTIVE TREND
   TO CONTINUE AMID A GRADUALLY COOLING AND STABILIZING BOUNDARY LAYER.
   AS SUCH...AN ADDITIONAL DOWNSTREAM WATCH IS NOT ANTICIPATED.

   ..MEAD.. 07/21/2015


   ATTN...WFO...LMK...OHX...IND...PAH...MEG...LZK...

   LAT...LON   36718771 36208833 36238920 36118995 35829059 35769109
               36059123 36589018 37008948 37368876 38098845 38308816
               38558747 38448685 37868664 37418677 36848742 36718771 

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Page last modified: July 21, 2015
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