Storm Prediction Center Mesoscale Discussion 1182

   Mesoscale Discussion 1182
   NWS Storm Prediction Center Norman OK
   0903 AM CDT Thu Jun 18 2026

   Areas affected...portions of the central Gulf Coast

   Concerning...Tornado Watch 351...

   Valid 181403Z - 181530Z

   The severe weather threat for Tornado Watch 351 continues.

   SUMMARY...The potential for tornadoes and damaging wind gusts
   continues across Tornado Watch 351. This risk is expected to spread
   inland and eastward through the morning.

   DISCUSSION...Regional radar imagery depicts several supercells
   embedded within a broader precipitation shield downstream of the
   remnants of Tropical Storm Arthur, currently analyzed over northern
   Louisiana. This activity has produced several reports of
   wind/potential tornado damage over southeastern Louisiana and
   southern Mississippi over the past several hours, with low-level
   Vrot signatures ranging form 30-40 kts at times. Expectation is for
   this activity to persist through the morning while spreading
   inland/eastward along a thermal/instability gradient (low-80s F
   temperatures and rich tropical moisture contributing to greater
   MLCAPE of 500-1500+ J/kg analyzed along the coast). Strong low-level
   flow and SRH (45-50 kts at 2 km AGL and 200 m2/s2 0-500 m SRH,
   respectively, sampled by the HDC/MOB VWPs) and looping hodographs
   will continue to favor the development/maintenance of low-level
   mesocyclones with the potential for tornadoes and damaging wind
   gusts.

   ..Chalmers.. 06/18/2026

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

   ATTN...WFO...BMX...MOB...JAN...LIX...

   LAT...LON   30258909 30308960 30388979 30658995 30828995 31108979
               31718913 32038869 32208841 32298820 32298791 32208766
               32018738 31738715 31558716 31238729 30848773 30688805
               30458848 30288898 30258909 

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