Mesoscale Discussion 1010
   NWS Storm Prediction Center Norman OK
   0540 PM CDT Fri Jun 26 2020

   Areas affected...Southeastern Iowa...far northeastern Missouri...and
   far western Illinois

   Concerning...Severe Thunderstorm Watch 305...

   Valid 262240Z - 262345Z

   The severe weather threat for Severe Thunderstorm Watch 305
   continues.

   SUMMARY...Storms forming in southeastern Iowa will likely become
   severe within the hour. An expansion of watch 305 may be needed.

   DISCUSSION...Within the last 30 minutes, storms have started to form
   in southeast Iowa along and south of a cold front where dewpoints
   are maximized in the low to mid 70s. This area currently has MLCAPE
   around 2500 J/kg per SPC mesoanalysis and effective shear around 40
   knots per KDVN 20Z RAOB. Therefore, these storms are expected to be
   supercellular and pose a threat for large hail and damaging winds.
   An areal extension of watch 306 will likely be needed to cover this
   threat. 

   In addition, a later MCD and watch will probably be needed farther
   west in Iowa and into Nebraska/Kansas later this evening.

   ..Bentley/Edwards.. 06/26/2020

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

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

   LAT...LON   40709318 41399225 41629171 41509097 41199063 40649093
               40509125 40429185 40479245 40709318