Mesoscale Discussion 0803
   NWS Storm Prediction Center Norman OK
   0637 PM CDT Wed Jun 03 2020

   Areas affected...southeast Iowa into northern Missouri and
   west/central Illinois

   Concerning...Severe Thunderstorm Watch 245...

   Valid 032337Z - 040130Z

   The severe weather threat for Severe Thunderstorm Watch 245
   continues.

   SUMMARY...Storms are expected to increase in coverage this evening
   within, and north of, WW 245. Localized damaging wind and hail are
   expected, and another watch could become necessary.

   DISCUSSION...Very strong instability remains in place over the
   region, south of a stationary front from southern IA into central
   IL. Little air mass has been overturned thus far, with only
   isolated, southwestward-moving cells northwest of the STL area.
   However, an isolated cell does exist near DVN near the instability
   axis, and is nearly stationary.

   Modest southwest flow in the low-levels will continue an influx of
   moist/unstable air across the area. Outflow from the northeast MO
   cells, along with weak convergence near the larger scale front, may
   focus additional development this evening. Weak westerlies aloft and
   southwesterly surface winds should favor south to southeastward
   propagating storms capable of localized damaging downbursts. The
   strongest storms may produce hail as instability is quite strong.

   ..Jewell.. 06/03/2020

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

   ATTN...WFO...ILX...LSX...DVN...DMX...EAX...

   LAT...LON   39729154 39699265 40119324 40719353 41269323 41619256
               41649147 41619077 41228976 40748917 40168912 39658958
               39649018 39729154