Storm Prediction Center Mesoscale Discussion 1176

   Mesoscale Discussion 1176
   NWS Storm Prediction Center Norman OK
   0204 AM CDT Thu Jun 18 2026

   Areas affected...Southern portions of Louisiana and Mississippi

   Concerning...Tornado Watch 348...

   Valid 180704Z - 180900Z

   The severe weather threat for Tornado Watch 348 continues.

   SUMMARY...The potential for tornadoes will continue to focus
   primarily across southeast Louisiana near/to the south of I-12/I-10
   over the next several hours (predawn).

   DISCUSSION...Related to Post-Tropical Cyclone Arthur, regional
   WSR-88D data indicate a continued strengthening of
   south-southwesterly winds (30-40 kt) in the lowest 1-2 km AGL across
   southern portions of Louisiana and Mississippi. This same trend is
   expected to continue through the early morning hours with a further
   strengthening and gradual east-northeastward expansion of the
   stronger low-level wind field. The most buoyant low-level air mass
   will tend to stay relegated to within 50-75 miles of the southern
   Louisiana coast over the next several hours, with this being the
   primary area for tornado potential in the predawn hours.

   ..Guyer.. 06/18/2026

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

   ATTN...WFO...MOB...JAN...LIX...LCH...

   LAT...LON   29179176 30659097 31029005 30978921 30518887 29368910
               28858949 28789061 29179176 

   MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
   MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH