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ACUS11 KWNS 092027
SWOMCD
SPC MCD 092026
LAZ000-TXZ000-092230-

Mesoscale Discussion 0173
NWS Storm Prediction Center Norman OK
0226 PM CST Sat Mar 09 2019

Areas affected...portions of northern Louisiana and a small part of
east Texas

Concerning...Severe Thunderstorm Watch 12...

Valid 092026Z - 092230Z

The severe weather threat for Severe Thunderstorm Watch 12
continues.

SUMMARY...An isolated severe risk will exist for an hour or two, but
the overall trend is expected to be such that a new watch is not
anticipated.

DISCUSSION...Widely scattered strong/occasionally severe storms were
in progress at 2020Z across northwest LA along an eastward-moving
surface trough. Diurnal heating has contributed to MLCAPE upwards
of 1000-1250 J/kg, and deep-layer shear remains more than sufficient
with westerly shear averaging 50 kts. Low-level flow has veered
ahead of the surface trough, however, and with large-scale ascent
lifting north of the area, storm coverage should remain widely
scattered. An isolated storm may become severe through around 22Z,
with a decrease in overall intensity beyond this time. Based on
these expected convective trends, a new watch is not anticipated.

..Bunting/Thompson.. 03/09/2019

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

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

LAT...LON 31649210 31459272 31349379 31609411 31959412 32159368
32339314 32429286 32509233 32449219 32059202 31649210



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