US Mesoscale Discussions

Storm Prediction Center Mesoscale Discussion 726

   Mesoscale Discussion 0726
   NWS Storm Prediction Center Norman OK
   0426 AM CDT Thu May 09 2024

   Areas affected...Southern Tennessee...Northeast Alabama...Northern

   Concerning...Tornado Watch 215...

   Valid 090926Z - 091130Z

   The severe weather threat for Tornado Watch 215 continues.

   SUMMARY...A threat for wind damage, hail and a tornado or two is
   expected to persist early this morning from southern Tennessee and
   northeast Alabama east-southeastward across much of northern
   Georgia. Weather watch issuance may be needed as the convection
   approaches the eastern edge of WW 215.

   DISCUSSION...The latest hi-resolution radar imagery from Huntsville,
   AL shows a linear MCS, with several embedded severe storms, located
   from southeast Tennessee southwestward into far northern Alabama.
   Ahead of the MCS, the RAP has MLCAPE generally in the 1500 to 2000
   J/kg range. The WSR-88D VWP from Huntsville, AL has 0-6 km shear
   near 45 knots, suggesting that supercells and bowing line segments
   will be possible. The wind-damage potential should be greatest along
   the leading edge of the stronger line segments. In addition, VWPs
   have 0-3 storm-relative helicity near 250 m2/s2, suggesting that an
   isolated tornado threat will be possible with supercells, especially
   with cells that interact with the outflow boundary. The threat
   should continue to persist as the MCS moves along either side of the
   outflow boundary, and across the remainder of northeast Alabama and
   northern Georgia later this morning.

   ..Broyles.. 05/09/2024

   ...Please see for graphic product...


   LAT...LON   34828690 34448677 34018611 33348362 33338278 33658251
               34128256 34498295 34898390 35488559 35458631 35128672

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