Mesoscale Discussion 0922
   NWS Storm Prediction Center Norman OK
   0334 PM CDT Thu Jun 28 2018

   Areas affected...Eastern Missouri...Illinois

   Concerning...Severe Thunderstorm Watch 232...

   Valid 282034Z - 282230Z

   The severe weather threat for Severe Thunderstorm Watch 232
   continues.

   SUMMARY...A wind damage threat may continue for a few more hours
   across eastern Missouri into western and central Illinois. A new
   weather watch or a local extension will be possible later this
   afternoon.

   DISCUSSION...The latest radar imagery shows a linear MCS across far
   western Illinois extending southwestward into northeast Missouri.
   The line of storms is located along a gradient of moderate
   instability where MLCAPE values are estimated in the 2000 to 4000
   J/kg range by the RAP. The line of storms appears to be associated
   with a minor perturbation moving southeastward across the mid
   Mississippi Valley evident on water vapor imagery. Although the
   linear MCS does not look as organized over the last hour, a threat
   for isolated wind damage and hail will continue due to the favorable
   thermodynamic environment. If the linear MCS can hold together
   across central and southern Illinois, then a new weather watch can
   not be ruled out later this afternoon.

   ..Broyles/Hart.. 06/28/2018

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

   ATTN...WFO...IND...PAH...ILX...LSX...DVN...

   LAT...LON   39248806 40118848 40858949 40799046 40119145 39439191
               38879167 38489079 37998988 37428867 37628811 37868763
               38228760 38658780 39248806