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Mesoscale Discussion 1002
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   Mesoscale Discussion 1002
   NWS Storm Prediction Center Norman OK
   0638 PM CDT Mon Jun 12 2017

   Areas affected...Portions of central...southern and eastern WI

   Concerning...Severe Thunderstorm Watch 316...319...

   Valid 122338Z - 130145Z

   The severe weather threat for Severe Thunderstorm Watch 316, 319
   continues.

   SUMMARY...Severe threat for damaging winds and hail persists across
   WW 319 this evening, while these threats have moved east of WW 316
   (allowing this latter watch to be canceled early).

   DISCUSSION...Mosaic radar imagery showed an ongoing bow advancing to
   the east at 35-40 kt across south-central toward eastern WI, with
   the bow currently extending from western Waupaca County to Waushara
   and Green Lake Counties at the bow apex to Sauk County.  From the
   apex of the bow, a surface boundary extended eastward to Sheboygan
   County and across the middle portion of Lake Michigan.  The
   environment downstream from the bow remains moderately unstable with
   effective bulk shear of 40-50 kt oriented parallel to the surface
   boundary.  These factors suggest a continued forward propagation of
   the bow with damaging winds being the primary threat along the bow
   path.  Meanwhile, additional strong to severe storm development
   remains possible with northward extent (across the WI counties of
   Marathon to Oconto) where sufficient instability and strong bulk
   shear favor storm organization with a hail and damaging wind threat.

   ..Peters.. 06/12/2017

   ...Please see www.spc.noaa.gov for graphic product...

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

   LAT...LON   42729057 43139011 43908925 44958975 45078953 45308845
               44998777 44688680 43418724 42478698 42489023 42729057 

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Page last modified: June 13, 2017
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