Hmm, well, I may be wishcasting again.
From the current MCD:
Eastward expansion of WW 131 will likely be needed in the coming hours across portions of eastern IL. Drier low-level conditions downstream across IN casts some uncertainty on how intense the line will be beyond roughly the 05-06 UTC time frame into IN, but convective trends will be monitored for the need for downstream watch issuance.