Mesoscale Discussion 0523
   NWS Storm Prediction Center Norman OK
   0618 PM CDT Sun May 03 2020

   Areas affected...Much of Middle Tennessee

   Concerning...Severe Thunderstorm Watch 159...

   Valid 032318Z - 040015Z

   The severe weather threat for Severe Thunderstorm Watch 159
   continues.

   SUMMARY...A few damaging gusts may accompany the leading line of a
   weakening bow echo across middle into eastern Tennessee, with some
   marginally severe hail accompanying storms northeast of Memphis.

   DISCUSSION...Though on a gradual downward trend, the severe threat
   continues across WW 0159 in association with a classic "bow and
   arrow" structured bow echo across middle into western Tennessee. The
   bow echo leading line continues to move into a mixed out low-level
   airmass across eastern Tennessee, with a weakening trend noted.
   Nonetheless, the leading line continues to traverse a region of
   steep low and mid-level lapse rates, suggesting that some damaging
   wind threat will continue with this convection for a few more hours.

   Farther west, an 925-850 mb moist axis bissects the bow-echo
   training cold pool, optimizing parcel ascent atop colder, denser air
   to reach their LFCs across western TN, where stronger storms have
   been noted based on KNQA WSR-88D data, with up to golfball hail
   reported over the past hour. Low level moisture advection over the
   cold pool, with some steeper mid-level lapse rates gradually
   advection eastward, may foster some severe hail potential with the
   stronger storms.

   ..Squitieri.. 05/03/2020

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

   ATTN...WFO...MRX...JKL...FFC...LMK...OHX...HUN...PAH...MEG...

   LAT...LON   35968940 36758794 36698536 36598484 35918462 35328487
               34638573 34408648 34768782 35048897 35968940