Mesoscale Discussion 0699
   NWS Storm Prediction Center Norman OK
   0120 AM CDT Sun May 24 2020

   Areas affected...central NE

   Concerning...Severe Thunderstorm Watch 215...

   Valid 240620Z - 240715Z

   The severe weather threat for Severe Thunderstorm Watch 215
   continues.

   SUMMARY...A focused corridor of severe gusts in the 60-80 mph range
   is possible with an evolving bow during the 115am-245am CDT period.

   DISCUSSION...Radar mosaic during the past hour shows a squall line
   moving east at 40-45 kt across the NE Sandhills.  This squall line
   has recently overtaken a supercell ahead of the line.  The likely
   evolution of the supercell to bow will occur through 2am CDT. 

   Surface observations ahead of bow show temperatures near 70 deg F
   and surface dewpoints in the lower-mid 60s.  The steep 700-500mb
   lapse rates (8 deg C/km) sampled on the 7pm CDT Omaha observed
   sounding will likely contribute to longevity of the bow as it moves
   into eastern NE during the next several hours.  As this occurs, the
   initial evolution of the supercell to bow will likely yield the
   greatest risk for 60-80 mph gusts in a relatively focused corridor.

   ..Smith.. 05/24/2020

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

   ATTN...WFO...OAX...GID...LBF...

   LAT...LON   41969782 42039850 41899897 41529908 41339878 41379778
               41679758 41969782