Storm Prediction Center Mesoscale Discussion 1688

   Mesoscale Discussion 1688
   NWS Storm Prediction Center Norman OK
   0850 PM CDT Thu Sep 02 2021

   Areas affected...portions of southern Nebraska into northern Kansas

   Concerning...Tornado Watch 487...

   Valid 030150Z - 030315Z

   The severe weather threat for Tornado Watch 487 continues.

   SUMMARY...A damaging gust or two remains possible with one of the
   stronger storms, though the overall severe threat is expected to
   diminish.

   DISCUSSION...MRMS mosaic radar imagery depicts decreasing storm
   coverage and an overall decrease in 30 dBZ echo top heights across
   northwestern portions of Tornado Watch 487. As deep-layer ascent
   continues to drift away from portions of south-central Nebraska in
   tandem with nocturnal cooling, low-level lift will further weaken
   with time, as will storm intensity. Nonetheless, given ample
   vertical shear across the region and some residual buoyancy (1000+
   J/kg MLCAPE), storms may remain organized enough to support a
   damaging gust or two over the next couple of hours.

   ..Squitieri/Guyer.. 09/03/2021

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

   ATTN...WFO...OAX...TOP...GID...

   LAT...LON   40349966 40849909 41329824 41369758 41109700 40629681
               40199691 39999724 39969793 39949859 40079934 40349966