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Mesoscale Discussion 1204
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   MESOSCALE DISCUSSION 1204
   NWS STORM PREDICTION CENTER NORMAN OK
   0943 PM CDT SUN JUN 29 2014

   AREAS AFFECTED...ECNTRL THROUGH NERN IA INTO SWRN WI AND NWRN IL

   CONCERNING...SEVERE THUNDERSTORM WATCH 369...

   VALID 300243Z - 300415Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 369
   CONTINUES.

   SUMMARY...THREAT FOR MAINLY ISOLATED DAMAGING WIND AND LARGE HAIL
   PERSISTS FROM ERN IA INTO SWRN WI AND NWRN IL. A SHORT-TERM THREAT
   FOR A TORNADO ALSO EXISTS OVER A PORTION OF ECNTRL IA.

   DISCUSSION...NUMEROUS STORMS PERSIST FROM ECNTRL IA INTO SWRN WI
   WITHIN A MODERATELY UNSTABLE ENVIRONMENT. STORMS APPEAR TO BE
   DEVELOPING WHERE A MODEST INCREASE IN THE SSWLY LLJ HAS AUGMENTED
   ASCENT IN VICINITY OF AN E-W ORIENTED BOUNDARY. BOTH THE DES MOINES
   AND DAVENPORT VWP DATA HAVE SHOWN SOME INCREASE IN 0-1 KM HODOGRAPH
   SIZE...AND 0-6 KM SHEAR IS ON THE ORDER OF 50 KT. THIS ENVIRONMENT
   WILL REMAIN FAVORABLE FOR ORGANIZED STORMS INCLUDING A FEW
   SUPERCELLS. THE STRONGEST STORMS WITH SUPERCELL STRUCTURES ARE
   MOVING INTO BENTON COUNTY OVER ECNTRL IA. THESE STORMS MAY PRODUCE
   LARGE HAIL AND DAMAGING WIND...BUT A TORNADO ALSO REMAINS POSSIBLE
   IN THE NEAR TERM. GIVEN THE NUMBER OF STORMS DEVELOPING...THERE
   SHOULD BE A TENDENCY FOR UPSCALE GROWTH INTO CLUSTERS/LINES DURING
   THE NEXT COUPLE HOURS.

   ..DIAL.. 06/30/2014


   ATTN...WFO...LOT...MKX...DVN...ARX...

   LAT...LON   41379193 42689200 43409144 43758940 42038967 41379193 

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Page last modified: June 30, 2014
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