Storm Prediction Center Mesoscale Discussion 1178

   Mesoscale Discussion 1178
   NWS Storm Prediction Center Norman OK
   0512 AM CDT Thu Jun 18 2026

   Areas affected...Eastern Louisiana...Southern
   Mississippi...Southwest Alabama

   Concerning...Tornado Watch 348...

   Valid 181012Z - 181115Z

   The severe weather threat for Tornado Watch 348 continues.

   SUMMARY...A tornado threat will likely continue into the mid to late
   morning over parts of eastern Louisiana and southern Mississippi.
   The threat may also impact southwest Alabama. A watch extension or
   replacement watch will be needed.

   DISCUSSION...The remnants of Tropical Cyclone Arthur is currently
   moving inland across the lower Mississippi Valley. On the
   southwestern edge of the system, multiple supercells are ongoing
   that are capable of producing tornadoes. These storms are located
   just to west and north of New Orleans, near the center of a 40 knot
   low-level speed max analyzed by the RAP. In this vicinity, the
   latest WSR-88D VWP to the northwest of Lake Pontchartrain currently
   shows a looped hodograph, with 30 to 40 knots of flow in the lowest
   2 km above ground level. This environment will support a continued
   tornado threat as the system moves slowly north-northeastward this
   morning. Isolated severe wind gusts will also be possible.

   ..Broyles.. 06/18/2026

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

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

   LAT...LON   31169115 31609043 31808961 31858873 31718811 31418771
               31018760 30618771 30358798 29978858 29588976 29569045
               29649104 30019154 30669156 31169115 

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