SPC Mesoscale Discussion 1999

by Evan Bentley with the United States Storm Prediction Center

  Mesoscale Discussion 1999
  NWS Storm Prediction Center Norman OK
  0948 PM CST Fri Dec 10 2021

  Areas affected...Portions of western Kentucky

  Concerning...Tornado Watch 552...554...

  Valid 110348Z - 110445Z

  The severe weather threat for Tornado Watch 552, 554 continues.

  SUMMARY...A strong to potentially violent tornado is ongoing and
  expected to continue for at least another hour.

  DISCUSSION...A strong supercell with a history of a long-track
  tornado with intense to potentially violent damage has recently
  intensified once again across southwest Kentucky.
 Latest radar and
  environmental analysis give high confidence that an intense to
  potentially violent tornado has occurred across southwest Kentucky.

  The radar presentation of this storm continues to be extremely
  favorable for continued intense, long-lived tornadoes.
 Nearby
  convection has mostly dissipated which may allow a more steady-state
  to continue as it moves northeast.
 The downstream environment
  remains very favorable with upper 60s to low 70s dewpoints and
  backed surface winds with STP around 5 to 6.
 Eventually, expect
  storm activity to the west to catch this supercell, but until that
  happens, continued strong to potentially violent tornadic damage is
  expected to continue along its path.

  ..Bentley.. 12/11/2021

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

  ATTN...WFO...PAH...

  LAT...LON   36818874 37308804 37518752 37328727 37018769 36638861
              36648879 36688887 36818874