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Mesoscale Discussion 1140
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MD 1140 graphic

   Mesoscale Discussion 1140
   NWS Storm Prediction Center Norman OK
   0435 PM CDT Fri Jun 23 2017

   Areas affected...Portions of northern/central AR...far southeastern
   MO...far western TN...and far northwestern MS

   Concerning...Severe Thunderstorm Watch 367...

   Valid 232135Z - 232300Z

   The severe weather threat for Severe Thunderstorm Watch 367

   SUMMARY...An isolated strong/gusty wind threat with associated risk
   for tree damage continues with a line of thunderstorms moving
   southeastward across WW 367.

   DISCUSSION...Outflow has recently surged ahead of an ongoing line of
   thunderstorms across parts of northern/central AR per KLZK radar
   imagery. The eastern extent of the line (across northeastern AR)
   remains more orthogonal to modest northwesterly mid-level flow, and
   may pose a locally greater damaging wind risk over the next several
   hours as it approaches the AR/TN state line. The forecast office in
   Memphis TN has recently expanded the watch eastward slightly into
   far western TN/northwestern MS to account for this threat. An
   isolated strong/gusty wind risk should also continue farther west
   into central AR, where sporadic instances of trees down have been
   reported this afternoon. The airmass downstream of ongoing
   convection remains moderately to strongly unstable per 21Z RAP
   Mesoanalysis, and should support the continuation of the line
   through the early evening hours. Later this evening, the loss of
   daytime heating with resultant lessening of instability and
   continued modest mid-level winds should result in gradual weakening
   of the line.

   ..Gleason.. 06/23/2017

   ...Please see for graphic product...


   LAT...LON   35299364 35499357 35339294 35249226 35329175 35749127
               36369076 36288958 36188913 34588971 34139022 34179069
               34149192 34279364 35299364 

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