Storm Prediction Center Mesoscale Discussion 256

   Mesoscale Discussion 0256
   NWS Storm Prediction Center Norman OK
   1010 PM CDT Sun Mar 15 2026

   Areas affected...far northwestern Alabama and south central Middle
   Tennessee

   Concerning...Tornado Watch 59...

   Valid 160310Z - 160430Z

   CORRECTED FOR TEXT

   The severe weather threat for Tornado Watch 59 continues.

   SUMMARY...Tornado risk increasing.

   DISCUSSION...A discrete supercell has shown persistent rotation and
   strengthening over the last 30-45 minutes near the TN/AL state line.
   A second cell has also shown persistent rotation to the north of the
   TN state line. This is on the southern end of a cluster of cells
   ahead of the main squall line back to the west on the edge of the 60
   F dew points. Within this region, STP around 2 is analyzed in
   surface objective analysis, with VAD profiles from KBNA and KGWX
   showing large low-level curvature in hodographs. This corridor will
   pose a relatively higher risk for tornadoes over the next 1-2 hours
   given the favorable shear and thermodynamic environment.

   ..Thornton.. 03/16/2026

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

   ATTN...WFO...OHX...HUN...MEG...

   LAT...LON   34758825 35278792 35408763 35298701 35038668 34658686
               34528771 34588827 34758825 

   MOST PROBABLE PEAK TORNADO INTENSITY...120-150 MPH
   MOST PROBABLE PEAK WIND GUST...75-90 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN