340
ACUS11 KWNS 250322
SWOMCD
SPC MCD 250322
MSZ000-LAZ000-TXZ000-250515-

Mesoscale Discussion 2226
NWS Storm Prediction Center Norman OK
0922 PM CST Mon Nov 24 2025

Areas affected...Northern/Central Louisiana and western Mississippi

Concerning...Tornado Watch 639...

Valid 250322Z - 250515Z

The severe weather threat for Tornado Watch 639 continues.

SUMMARY...Severe threat is expected to spread across northern, and
portions of central, Louisiana over the next 1-3 hours. With time
this activity should spread into western Mississippi.

DISCUSSION...Low-amplitude short-wave trough is approaching the
lower Sabine River Valley, per latest water-vapor imagery. In
response to this feature, a squall line has matured over the last
few hours, extending from San Augustine County TX-Bienville Parish
LA. Along this corridor, several smaller bow-like structures have
developed and have accelerated a bit in response to strengthening
midlevel flow. This linear MCS is expected to advance across the
remainder of northern/central LA by 06-07z, likely spreading into
portions of western MS as the warm front gradually lifts north.
There is some concern this activity may remain organized as it exits
the northeastern corner of ww639. If air mass destabilization is
adequate downstream, a new watch may be warranted. Tornado risk
continues with any supercells, and with circulations along the
squall line. Localized damaging winds may also be noted ahead of any
fast-moving bow echoes.

..Darrow.. 11/25/2025

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

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

LAT...LON   32409279 32899096 31999065 30959279 31099396 32409279

MOST PROBABLE PEAK TORNADO INTENSITY...100-130 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN