Got an email about possible disruptions because of storms (flying from LGA -> ORD on 5/28, and returning on 5/30) and being able to change flights free of charge, except looking at the weather forecast there doesn't appear to be any inclement weather in Chicago, and possibly some rain on Saturday (and nothing on Monday).
I also checked
https://jetstream.united.com/#/all-travel-waiver and there doesnt seem to be any travel waivers listed. Any ideas whats going on?