ZCZC SPCSWOMCD ALL
ACUS11 KWNS 100400 
SPC MCD 100400 
MSZ000-LAZ000-100600-

Mesoscale Discussion 0356
NWS Storm Prediction Center Norman OK
1100 PM CDT Fri Apr 09 2021

Areas affected...southern Louisiana and Mississippi

Concerning...Severe Thunderstorm Watch 86...

Valid 100400Z - 100600Z

The severe weather threat for Severe Thunderstorm Watch 86
continues.

SUMMARY...Severe wind gusts remain possible with storms oriented
along an outflow boundary from central Louisiana into central
Mississippi. A tornado risk may eventually develop later tonight
south of this outflow boundary, and convective trends will continue
to be monitored.

DISCUSSION...A long-lived thunderstorm corridor persists, and is
gradually translating east/southeast as outflow pushes south with
time. Many of these storms are elevated north of the boundary, but
may still produce strong wind gusts, and perhaps severe immediately
along it.

Of note in the surface analysis is a limiting streamline extending
from the northern Gulf of Mexico into south-central MS, with lower
70s F dewpoints west of this line. Bands of shallow
convection/showers are currently observed, and trends will need to
be monitored closely for more vigorous thunderstorms forming south
of the outflow boundary. 

With 0-1 SRH over 200 m2/s2 observed on VWPs, and ample instability,
a conditional risk of tornadoes exists with any cells that can form
away from the undercutting outflow.

..Jewell.. 04/10/2021

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

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

LAT...LON   31399244 31709138 32159026 32219014 32178979 31828947
            31088926 30568951 30308968 30209000 30179086 30079184
            30279285 30719314 31029306 31399244 

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