Mesoscale Discussion 1234
   NWS Storm Prediction Center Norman OK
   0213 PM CDT Wed Jul 15 2020

   Areas affected...West-Central/Central IL

   Concerning...Tornado Watch 373...

   Valid 151913Z - 152015Z

   The severe weather threat for Tornado Watch 373 continues.

   SUMMARY...All severe hazards, including large hail and a tornado or
   two, are possible along the northern periphery of Tornado Watch 373
   for the next hour or two.

   DISCUSSION...Recent surface analysis places a low north of COU in
   central MO, with a warm front extending east-northeastward across
   central IL. Showers and thunderstorms have been ongoing across
   west-central and central IL north of this warm front for the past
   few hours. However, recent radar imagery has shown a strengthening
   trend with a few of these storms, particularly the storm in Tazewell
   County. As evidenced by the 17Z ILX sounding, instability is modest
   in this region, but vertical shear is strong. As a result, more
   persistent updrafts should be able to organize/rotate, contributing
   to a slightly greater severe threat than would otherwise be
   supported by the instability. Additionally, initially elevated
   storms (like those west of Tazewell County) may be able to
   transition to more surface-based if mid-level rotation persists
   and/or as a result of interaction with the warm frontal zone.
   Consequently, all severe hazards are possible, including large hail
   and a tornado or two.

   ..Mosier/Guyer.. 07/15/2020

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

   ATTN...WFO...LOT...ILX...LSX...DVN...

   LAT...LON   40579102 41288892 41108807 40428830 39849092 40579102