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Mesoscale Discussion 1112
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   Mesoscale Discussion 1112
   NWS Storm Prediction Center Norman OK
   0629 PM CDT Wed Jun 21 2017

   Areas affected...Southern Louisiana eastward to the Florida
   Panhandle and southwestern Alabama

   Concerning...Tornado Watch 359...

   Valid 212329Z - 220030Z

   The severe weather threat for Tornado Watch 359 continues.

   SUMMARY...Tornado watch 359 continues until 00Z.  A new tornado
   watch is being considered at this time.

   DISCUSSION...A strongly sheared, weakly unstable environment
   continues to support some threat for a tornado or two - especially
   across southern Alabama where several northward-moving storms have
   exhibited at least modest low-level rotation.  Farther west,
   convection has decreased in coverage in response to drier air aloft
   migrating into the region from the south.  It is currently unclear
   whether storms can re-develop across the region.  Higher-resolution
   guidance suggests that storms may redevelop across south-central
   Louisiana that may pose a tornado threat later tonight, although
   this regime is currently uncertain.

   Latest thinking is that a replacement tornado watch will be needed
   in southern Alabama and the adjacent Florida Panhandle as convective
   cells with rotation continue to move northward across the region. 
   This watch will be issued within the hour.  Farther west, trends
   will be monitored for possible redevelopment of convection closer to
   the center of Cindy, which may possibly necessitate a watch for
   portions of southern Louisiana later tonight.

   ..Cook/Hart.. 06/21/2017

   ...Please see for graphic product...


   LAT...LON   30979262 31309164 31478922 31468775 31438686 31298636
               30908619 30428643 29848692 29538780 29128870 28918945
               28859044 28899124 29089224 29269269 30029289 30719272

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