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Mesoscale Discussion 922
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   MESOSCALE DISCUSSION 0922
   NWS STORM PREDICTION CENTER NORMAN OK
   0156 AM CDT SUN JUN 07 2015

   AREAS AFFECTED...IOWA

   CONCERNING...SEVERE THUNDERSTORM WATCH 266...

   VALID 070656Z - 070900Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 266
   CONTINUES.

   SUMMARY...ISOLATED STRONG TO SEVERE WIND GUSTS REMAIN POSSIBLE
   ACROSS A LIMITED PORTION OF IOWA THIS MORNING.

   DISCUSSION...A WELL-DEFINED MCS CONTINUES TO DEVELOP EWD ACROSS WW
   266 WITH MCV CENTERED OVER NRN IA AND A SQUALL LINE EXTENDING SWWD
   INTO CNTRL IA. RECENT SURFACE OBSERVATIONS SUGGEST THE LINE IS
   NON-SEVERE IN A BROAD SENSE...WITH WIDESPREAD 30-40 KT GUSTS.
   HOWEVER...LOCALIZED SEVERE GUSTS REMAIN POSSIBLE. IN
   ADDITION...RADAR TRENDS HAVE SHOWN AREAS OF ROTATION WITHIN THE LINE
   ESPECIALLY OVER CNTRL IA IN CLOSER PROXIMITY TO THE HIGHER DEWPOINTS
   AND A SHORT-LIVED AND LIKELY WEAK TORNADO CANNOT BE RULED OUT OVER
   THE NEXT HOUR OR TWO.

   THEREAFTER...THIS SYSTEM WILL PROGRESSIVELY ENCOUNTER A MORE STABLE
   AIR MASS AND MAY BECOME A BIT ELEVATED EXCEPT FOR THE TRAILING SW
   PORTION OF THE LINE ACROSS SRN IA. HOWEVER...GIVEN THE ORIENTATION
   OF THAT PART OF THE LINE...ANY SEVERE WEATHER THREAT SHOULD BE
   MINIMAL.

   ..JEWELL.. 06/07/2015


   ATTN...WFO...DVN...ARX...DMX...OAX...

   LAT...LON   40889432 41109505 41359506 41659437 42049362 42579328
               42989324 43289340 43449251 43069199 41589145 40829221
               40699354 40889432 

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Page last modified: June 07, 2015
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