CHICAGO, IL --
A message showed up early Sunday morning on the roof of the Rush University Medical Center's parking garage.
"Hi Mom, God Bless U!" was written in the snow and could be seen from several hospital rooms, ABC7 Chicago reports.
A nurse reportedly saw four people writing in the snow around 1am Monday and snapped a photo. It is unclear who the intended recipient is.
Our sister station, WLS-TV, is trying to track down who wrote the message or who it was written for, and they are taking tips on the ABC 7 Chicago Facebook page.