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Mesoscale Discussion 440
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   MESOSCALE DISCUSSION 0440
   NWS STORM PREDICTION CENTER NORMAN OK
   0610 PM CDT SUN APR 24 2016

   AREAS AFFECTED...NERN KS...ERN NEBRASKA...SERN SD...SWRN MN...WRN IA

   CONCERNING...SEVERE THUNDERSTORM WATCH 101...

   VALID 242310Z - 250015Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 101
   CONTINUES.

   SUMMARY...SEVERE THREAT CONTINUES ACROSS WW THIS EVENING.  LOCALIZED
   TORNADO THREAT WILL EXIST ALONG A CORRIDOR FROM THE NEBRASKA/KS
   BORDER INTO SWRN IA.

   DISCUSSION...CLUSTERS OF STRONG/SEVERE THUNDERSTORMS PERSIST ACROSS
   WW THIS EVENING.  RECENTLY...SEVERAL SUPERCELLS HAVE EVOLVED ALONG
   DRYLINE FROM CLAY/NUCKOLLS COUNTY NEBRASKA...SWD INTO MITCHELL
   COUNTY KS.  ANOTHER SEVERE SUPERCELL OVER SALINE COUNTY
   KS...POTENTIALLY TORNADIC...SHOULD REMAIN JUST SOUTH OF WW.  LATEST
   DIAGNOSTIC DATA SUGGESTS MOST BUOYANT/SHEARED AIR MASS RESIDES OVER
   NRN KS INTO SERN NEBRASKA.  THIS ACTIVITY SHOULD SPREAD ALONG THIS
   CORRIDOR TOWARD SWRN IA...COINCIDENT WITH EXPECTED LLJ INCREASE INTO
   THE MID MS VALLEY REGION THIS EVENING.  LARGE HAIL AND PERHAPS A FEW
   TORNADOES CAN BE EXPECTED WITH THESE SUPERCELLS.

   FARTHER NORTH...SEVERAL CLUSTERS OF STRONG/SEVERE TSTMS ARE
   EXPANDING IN AREAL COVERAGE FROM SERN SD INTO NWRN IA.  INCREASED
   WARM ADVECTION ACROSS THIS REGION FAVORS AN EXPANSION/PROGRESSION
   NORTHEAST INTO SCNTRL MN/NCNTRL IA OVER THE NEXT FEW HOURS.  LARGE
   HAIL IS THE PRIMARY THREAT WITH THIS ACTIVITY.

   ..DARROW.. 04/24/2016


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

   LAT...LON   39609860 44249754 44239429 39619559 39609860 

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