SPC MD 326



MD 0326 CONCERNING TORNADO WATCH 54… FOR PORTIONS OF EASTERN LOUISIANA AND SOUTHWEST MISSISSIPPI

MD 0326 Image

Mesoscale Discussion 0326
NWS Storm Prediction Center Norman OK
0435 PM CDT Sat Apr 13 2019

Areas affected...Portions of eastern Louisiana and southwest
Mississippi

Concerning...Tornado Watch 54...

Valid 132135Z - 132230Z

The severe weather threat for Tornado Watch 54 continues.

SUMMARY...The tornado threat will be maximized across eastern
Louisiana and portions of southwest Mississippi along the I-20
corridor over the next 1 to 2 hours.

DISCUSSION...21Z surface analysis shows a warm front along the I-20
corridor from Vicksburg to Jackson, MS. Along and south of this
boundary is where the tornado threat will be maximized over the next
1 to 2 hours. Very strong (30 to 35 knot) sustained southeasterly
surface winds are present across most surface observing stations
south of this warm front. The DGX VWP shows these winds veering and
strengthening to around 50 knots around 1.5 to 2 km above the
surface which yields 0-1 SRH around 250 to 300 m2/s2. A
line-embedded supercell currently moving into Mississippi in
southwest Warren county has taken advantage of this streamwise
vorticity rich environment with a consistent 50 to 60 knot Vrot over
the last 15 to 20 minutes from the KDGX WSR-88D. This storm, and any
additional strong updrafts which can develop in this area within the
next 1 to 2 hours have the potential to produce significant
tornadoes given the low level thermodynamic and kinematic
environment.

..Bentley.. 04/13/2019

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

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

LAT...LON   31879277 32259215 32729121 32859059 32889016 32548984
            32299011 32069064 31829120 31619209 31549245 31639280
            31879277 

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