Mesoscale Discussion 1227
   NWS Storm Prediction Center Norman OK
   0800 PM CDT Tue Jul 14 2020

   Areas affected...central and northeast Iowa

   Concerning...Severe Thunderstorm Watch 370...

   Valid 150100Z - 150200Z

   The severe weather threat for Severe Thunderstorm Watch 370
   continues.

   SUMMARY...Severe weather will remain possible across mostly southern
   portions of WW370. The most likely corridor for damaging winds and
   severe hail will be across central and northeastern Iowa.

   DISCUSSION...As of 0030 UTC, a broken band of thunderstorms was
   ongoing ahead of a cold front across portions of the Upper Midwest.
   Damaging winds will remain a threat across the southern half of
   WW370, where several severe storms were noted in the vicinity of Des
   Moines. SPC mesoanalysis indicates moderate to strong buoyancy is
   present across much of central Iowa with 2000-4000 J/kg of MLCAPE.
   Effective shear is relatively weak, with 30-35 kt being indicated by
   proximity RAP soundings. Storm motion parallel to the northeast to
   southwest oriented outflow/cold front will continue to support
   predominately linear storms with the threat of damaging wind gusts.
   Occasional severe hail may develop with semi discrete updrafts but
   storm interactions and mergers should limit this threat. Overall
   convective intensity has trended downward over the last hour, and
   this trend is expected to continue.

   ..Lyons/Edwards.. 07/15/2020

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

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

   LAT...LON   43399141 43279115 42769110 42509111 41039259 41009372
               41409420 41939407 42669314 43179242 43399141