Gov. Bruce Rauner activated the State Emergency Operations Center (SEOC) in Springfield Tuesday evening to ensure state crews are ready to be deployed if local emergency responders need them.
Brant Miller and the NBC 5 Storm team are tracking storms as they move across the Chicago area.
A confirmed "large and extremely dangerous tornado" was located over Ottawa, moving east at 45 mph, the National Weather Service reported.
The Illinois Emergency Management Agency is urging residents to prepare for a potential risk for tornadoes and other severe weather across much of Illinois.
Byron Miranda is tracking the potential for severe weather Tuesday and possibly even snow by Wednesday.
NBC 5's Andy Avalos is tracking the threat of strong to severe storms expected for the Chicago area Tuesday.
Strong storms moved across the Chicago area Tuesday afternoon and evening prompting numerous watches and warnings and reports of tornadoes in some suburbs.