|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
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.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 31639184 30799189 30269252 30329344 30589371 31409320
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