Mesoscale Discussion 1452
   NWS Storm Prediction Center Norman OK
   1214 PM CDT Mon Aug 10 2020

   Areas affected...Portions of central/eastern IA into far
   northwestern IL

   Concerning...Severe Thunderstorm Watch 425...426...

   Valid 101714Z - 101845Z

   The severe weather threat for Severe Thunderstorm Watch 425, 426
   continues.

   SUMMARY...Widespread damaging winds of 70-100 mph are expected to
   continue eastward across central/eastern Iowa over the next hour or
   so. These winds will likely impact Cedar Rapids/Iowa City, and
   eventually the Quad Cities area.

   DISCUSSION...A small but potent bow echo will continue rapidly
   eastward across eastern IA in the next hour or so. The apex of this
   bow is moving eastward around 55-60 kt, and the potential for
   widespread damaging winds remains apparent. A recent measured severe
   wind gust of 99 mph was reported at the Marshalltown ASOS associated
   with this bow, and a couple other gusts up to 100 mph have also been
   noted. Current expectations are for this bow echo to maintain its
   intensity across eastern IA, with 2500-3000 J/kg of MLCAPE present
   downstream. A swath of 70-100+ mph wind gusts producing destructive
   damage appears likely to impact the Cedar Rapids/Iowa City area
   within the next hour, eventually reaching the Quad Cities area
   around 1800-1830Z.

   ..Gleason.. 08/10/2020

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

   ATTN...WFO...DVN...DMX...

   LAT...LON   41379283 41639275 41919282 42189284 42369259 42349125
               42129013 41709009 41339040 41219064 41219216 41379283