Mesoscale Discussion 0230
   NWS Storm Prediction Center Norman OK
   0705 PM CDT Tue Mar 24 2020

   Areas affected...northern AL...southern TN...northwestern GA

   Concerning...Tornado Watch 61...

   Valid 250005Z - 250100Z

   The severe weather threat for Tornado Watch 61 continues.

   SUMMARY...A new convective watch is possible to the east of Tornado
   Watch #61.  A tornado risk will continue this evening for portions
   of northern AL and southern middle TN.

   DISCUSSION...Trends in KHTX VAD show further intensification of the
   low-level wind profile during the past 1-2 hours.  0-1 km SRH has
   increased from around 300 m2/s2 to over 600 m2/s2.  Surface analysis
   indicates the area with the lowest temperature/dewpoint spreads (10
   deg F) is in the counties adjacent to the TN border in northern AL. 
   Farther south, warmer temperatures have resulted in spreads in the
   15-20 deg F range which would lessen but not nullify tornado
   potential.  Given the strengthening low-level shear for mesocyclone
   organization/persistence, it seems plausible the tornado risk will
   eventually include the eastern counties of Tornado Watch #61 later
   this evening.  An additional convective watch issuance is possible
   to the east of the ongoing watch during the next hour or so.

   ..Smith.. 03/25/2020

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

   ATTN...WFO...MRX...FFC...OHX...BMX...HUN...

   LAT...LON   35318623 35338448 34868405 34378403 33868471 34158780
               34458778 35318623