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Mesoscale Discussion 138
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   Mesoscale Discussion 0138
   NWS Storm Prediction Center Norman OK
   1055 PM CDT Sun Mar 18 2018

   Areas affected...southwest through central Louisiana

   Concerning...Severe Thunderstorm Watch 12...

   Valid 190355Z - 190530Z

   The severe weather threat for Severe Thunderstorm Watch 12
   continues.

   SUMMARY...A modest for a few instances of damaging wind and hail
   will persist until around 06Z, but overall weakening trend should
   continue, and another WW issuance should not be needed.

   DISCUSSION...Overall trend has been for storms over central LA to
   undergo a gradual weakening trend and become less organized. This
   trend is expected to continue, but occasional semi-organized
   structures will persist. The downstream atmosphere across eastern LA
   and southwest MS is only marginally unstable north of a dissipating
   convective outflow boundary. The surface layer has cooled
   substantially with temperatures in the low 60s, suggesting
   convective inhibition will remain a limiting factor and should
   continue to promote a slow but gradual weakening trend. In the
   meantime, the stronger storms will remain capable of producing
   locally strong wind gusts and some hail.

   ..Dial.. 03/19/2018

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

   ATTN...WFO...JAN...LCH...SHV...

   LAT...LON   31639184 30799189 30269252 30329344 30589371 31409320
               31869243 31639184 

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Page last modified: March 19, 2018
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