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Mesoscale Discussion 1735
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   MESOSCALE DISCUSSION 1735
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 PM CDT FRI SEP 19 2014

   AREAS AFFECTED...NRN AND N-CNTRL IA

   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 

   VALID 200445Z - 200645Z

   PROBABILITY OF WATCH ISSUANCE...20 PERCENT

   SUMMARY...AN ISOLATED DAMAGING WIND GUST THREAT WILL PROBABLY
   PERSIST FOR THE NEXT FEW HOURS.

   DISCUSSION...RADAR MOSAIC AND SINGLE SITE 88D IMAGERY SHOW BOWING
   STRUCTURES WITHIN A LARGER-SCALE THUNDERSTORM LINE FROM S-CNTRL MN
   SWWD TO THE NEB/SD/IA BORDER.  KFSD IMAGERY HAS SHOWN SEVERAL
   INTENSE REAR INFLOW JET SIGNATURES IN THE MID-LEVELS.  THE
   CONVECTIVE LINE HAS AT TIMES BECOME MORE PERPENDICULAR WITH THE MEAN
   FLOW AND THIS APPEARS TO HAVE AIDED IN THE DEVELOPMENT OF THE REAR
   INFLOW JET/BOWING STRUCTURES WHERE THE THREAT FOR ISOLATED DAMAGING
   WINDS IS MAXIMIZED.  WITH THOSE FACTORS IN MIND...SURFACE
   OBSERVATIONS A FEW TIERS OF COUNTIES E OF I-35 HAVE INDICATED A
   SLIGHTLY DRIER BOUNDARY LAYER /DEWPOINTS IN THE LOWER 60S COMPARED
   TO MID-UPPER 60S WEST/.  THIS LIKELY RESULTS IN LARGER MLCINH WHICH
   WOULD BE LESS FAVORABLE FOR DOWNWARD MOMENTUM TRANSPORT. 
   NONETHELESS...THE THREAT FOR ISOLATED DAMAGING WINDS WILL PROBABLY
   PERSIST FOR A FEW MORE HOURS.

   ..SMITH/GOSS.. 09/20/2014


   ATTN...WFO...ARX...MPX...DMX...FSD...

   LAT...LON   42519517 42899427 43499356 43509253 42949227 42379286
               42159410 42099505 42519517 

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Page last modified: September 20, 2014
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