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Mesoscale Discussion 575
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   MESOSCALE DISCUSSION 0575
   NWS STORM PREDICTION CENTER NORMAN OK
   0931 PM CDT SUN MAY 11 2014

   AREAS AFFECTED...SERN NEB...WRN AND CNTRL IA

   CONCERNING...TORNADO WATCH 142...145...

   VALID 120231Z - 120330Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 142...145...CONTINUES.

   SUMMARY...DAMAGING WIND...LARGE HAIL...AND ISOLATED TORNADO THREAT
   CONTINUES ACROSS SERN NEB INTO WRN AND CNTRL IA. WITH WW 142
   EXPIRING AT 03Z...A NEW WATCH WILL LIKELY BE ISSUED ACROSS SERN NEB
   INTO SWRN IA.

   DISCUSSION...AT 0230Z...A BOWING LINE SEGMENT WITH A HISTORY OF
   PRODUCING WIND GUSTS IN EXCESS OF 70 KTS ACROSS ERN NEB IS MOVING
   INTO W-CNTRL IA. MODERATE INSTABILITY AND FAVORABLE VEERING WIND
   PROFILES WILL LIKELY SUSTAIN THIS STRUCTURE FOR THE NEXT 2-3
   HRS...WITH A CORRIDOR OF WIND DAMAGE POSSIBLE INTO CNTRL IA ALONG
   WITH A THREAT OF ISOLATED EMBEDDED TORNADOES. DISCRETE SUPERCELLS TO
   THE SOUTHWEST ACROSS SERN NEB/SWRN IA HAVE RECENTLY PRODUCED HAIL UP
   TO BASEBALL SIZE AND WILL CONTINUE TO POSE A THREAT OF VERY LARGE
   HAIL. AN ISOLATED TORNADO THREAT WILL ALSO EXIST WITH THESE
   CELLS...THOUGH THIS THREAT MAY BE LIMITED BY A TENDENCY FOR OUTFLOW
   TO UNDERCUT THE STORMS. 

   WITH WW 142 EXPIRING AT 03Z...A NEW WATCH WILL LIKELY BE ISSUED
   ACROSS SERN NEB INTO SWRN IA. WW 145 WILL REMAIN IN EFFECT FROM WRN
   INTO CNTRL IA UNTIL 08Z. 

   SOME ELEVATED CONVECTION WILL LIKELY PERSIST BEHIND THE OUTFLOW/COLD
   FRONT IN THE WAKE OF THE MAIN LINE ACROSS S-CNTRL INTO E-CNTRL
   NEB...BUT THE MAIN THREAT WITH THIS LINGERING CONVECTION WOULD
   LIKELY BE SUB-SEVERE HAIL.

   ..DEAN.. 05/12/2014


   ATTN...WFO...DMX...EAX...FSD...OAX...GID...

   LAT...LON   40289830 40589714 41039631 41589594 42059593 42549617
               42899619 43249606 43479586 43339461 42909372 42669352
               42389347 41849349 41409366 40969392 40779427 40589482
               40509539 40429593 40289675 40289830 

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Page last modified: May 12, 2014
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