Mesoscale Discussion 0146
   NWS Storm Prediction Center Norman OK
   0120 PM CST Sun Mar 03 2019

   Areas affected...Far northeast Louisiana...south-central into
   southeast Mississippi...southern into central Alabama...far western
   Florida Panhandle

   Concerning...Tornado Watch 7...

   Valid 031920Z - 032115Z

   The severe weather threat for Tornado Watch 7 continues.

   SUMMARY...Risk for damaging wind gusts and isolated tornadoes
   continues with the squall line across the MS/AL border.

   DISCUSSION...Convection has recently organized into a linear
   complex, now located roughly along a line from west of Selma, AL to
   Lake Pontchartrain. As a surface low, now located over central
   Alabama, continues to track eastwards, the associated squall line
   will continue to progress east into a moist, modestly unstable
   airmass (with up to 1000 J/kg MLCAPE noted, especially across
   southern Alabama).

   Transient supercell structures have recently been noted within the
   line, with a TDS noted in Washington County, AL around 1850Z. 1848Z
   MOB VAD profiler data suggests 0-1km SRH over 250 m2/s2, with 400
   m2/s2 0-3km SRH in association with an isallobarically driven
   low-level jet, suggesting tornado potential will continue across
   this area for the next few hours. In addition, a few damaging wind
   gusts will also be possible with forward- and rear-flank downdrafts
   in transient supercell structures, as well as with any bowing
   segments within the line.

   ..Squitieri.. 03/03/2019

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

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

   LAT...LON   30589097 30899011 31458864 32278756 32448708 32508582
               32228544 32058537 31268565 30598694 30338891 30589097