LAPS products show widespread convection developing across the ILN CWA by 21Z this afternoon.

In addition, some updraft helicity signals are noted.  Helicity signals are paired, which tend to suggest to me that stronger storms will be of a favored mode for splitting.  Large hail will be the initial threat.  The strongest signals are in the western portion of the CWA and the southeastern portion of the CWA, and convection has started in both locations, though both areas of convection appear to be sub-severe (at the time of writing this post, the Shelby County storm intensified quickly).

– JRM