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Mesoscale Discussion 1062
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   Mesoscale Discussion 1062
   NWS Storm Prediction Center Norman OK
   0619 PM CDT Fri Jun 16 2017

   Areas affected...much of mississippi...western
   Alabama...northeastern louisiana...and far southeastern arkansas

   Concerning...Severe Thunderstorm Watch 338...

   Valid 162319Z - 170015Z

   The severe weather threat for Severe Thunderstorm Watch 338

   SUMMARY...The severe threat continues across central/southern
   portions of WW 338, and a damaging wind threat may eventually impact
   western Alabama over the next hour or so.

   DISCUSSION...A couple of linear, forward propagating thunderstorm
   segments have evolved over WW 338 - 1) moving southward across the
   Mississippi Delta toward west-central Mississippi and 2) another
   migrating slowly southeastward across east-central Mississippi. 
   Both of these complexes are capable of localized damaging wind gusts
   and perhaps marginally severe hail owing to moderate instability
   (3000-4000 J/kg MUCAPE) within the pre-convective airmass ahead of
   the storms.  Deep shear is a bit stronger with western extent, which
   may partially explain the faster southward propagation with the
   western Mississippi segment.  

   Storms will likely begin to impact areas just east of WW 338 over
   the next 30 minutes or so, with a localized damaging wind threat
   continuing with this activity.  The probability of a new downstream
   watch is relatively low, however, as this threat should be fairly
   confined to a small part of far western Alabama.  Damaging wind
   gusts and hail are also possible along and just east of the
   Mississippi River through at least dark.  Farther north, overturning
   and attendant low-level stabilization has lessened the severe threat
   such that portions of WW 338 may be cancelled early - particularly
   in northeastern Mississippi.

   ..Cook.. 06/16/2017

   ...Please see for graphic product...


   LAT...LON   33919137 34009100 33989022 34108970 34358920 34678869
               34698845 34488820 34098783 33608737 33138719 32468723
               32048733 31378765 30868808 30828853 30898920 30999002
               31189066 31299118 31329160 31419183 31779189 32289185
               32919196 33349192 33609170 33919137 

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