I think there was some coordination on messaging by the NWS offices today.
Chicago:
Final Takeaway Message:
Given the severe weather parameters in play tomorrow, as well
as the threat for potentially significant flash flooding (even
outside of the higher severe threat areas), it is important to
continue to monitor later forecast updates closely. Review (and
practice) severe weather safety plans. Have multiple redundant
means to receive warning information, and keep mobile devices
charged in the event of power outages.
Northern IN:
So this is a potentially very dangerous situation
and one would be wise to use caution and stay very weather aware
tomorrow. Make sure to have multiple means of receiving
warnings and keep your cell phones charged up and a fresh set of
batteries in your weather radios in case of power outages.