Mesoscale Discussion 1146
   NWS Storm Prediction Center Norman OK
   0732 PM CDT Wed Jul 08 2020

   Areas affected...southwest into north-central NE

   Concerning...Severe Thunderstorm Watch 345...

   Valid 090032Z - 090130Z

   The severe weather threat for Severe Thunderstorm Watch 345
   continues.

   SUMMARY...The propensity for severe gusts (60-80 mph) will gradually
   increase this evening as upscale growth occurs.

   DISCUSSION...Visible-satellite imagery shows several thunderstorm
   clusters over NE early this evening.  The cluster over southwest NE
   preferentially developed near a north-south dryline/lee trough with
   the cluster near the Cherry County vicinity near a frontal zone. 
   KUEX shows modest low-level southerly flow whereas KLNX, in closer
   proximity to the storms, shows intensification of low-level flow
   (+15 to 20 kt at 1km AGL) in the past hour.  Model guidance this
   evening shows a strengthening southerly LLJ over the central Great
   Plains which should favor upscale growth into one or more clusters
   eventually evolving into an MCS.  The 7pm North Platte observed
   sounding showed a surface-400mb lapse rate in excess of 8 deg C/km. 
   As additional storms develop, mature, and coalesce their cold pools,
   considerable evaporative cooling with the stronger downdrafts will
   lead to an increased risk for severe gusts and potentially gusts in
   the 70-80 mph range.

   ..Smith.. 07/09/2020

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

   ATTN...WFO...LBF...BOU...

   LAT...LON   40470197 41190211 42660050 42989914 42609855 42109880
               40940083 40390123 40470197