Mesoscale Discussion 0820
   NWS Storm Prediction Center Norman OK
   0757 PM CDT Wed May 18 2022

   Areas affected...South-central Kentucky into northern middle
   Tennessee

   Concerning...Severe Thunderstorm Watch 240...

   Valid 190057Z - 190230Z

   The severe weather threat for Severe Thunderstorm Watch 240
   continues.

   SUMMARY...A local severe weather threat may persist for a few more
   hours across southern Kentucky and into northern Middle Tennessee.
   No downstream watch is anticipated.

   DISCUSSION...A cluster of supercells has developed on the western
   periphery of an ongoing storm cluster across central/south-central
   Kentucky. The modified 00Z BNA RAOB shows around 1000 J/kg of MLCAPE
   and near 50 knots of effective shear in the vicinity of these
   supercells. This should be sufficient for a sustained severe weather
   threat for a few more hours, especially with the strengthening
   low-level jet (~35 knots on the OHX VWP). A tornado or two cannot be
   ruled out with the stronger supercells given the moderately strong
   ongoing mesocyclones and 0-1 SRH around 200 m2/s2 (per OHX VWP). 

   This cluster of storms may eventually move out of watch 240 into
   northern Tennessee. However, a downstream watch will likely not be
   issued due to the localized nature of the threat and an increasingly
   hostile thermodynamic environment as these storms continue
   southeast.

   ..Bentley/Bunting.. 05/19/2022

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

   ATTN...WFO...MRX...JKL...LMK...OHX...

   LAT...LON   37348565 37378445 37158360 36608365 36388404 36278495
               36408551 36568568 36818580 37038581 37348565