Saturday's bolt knocked the National Weather Service facility's radar out of action until sometime Sunday.
"The technician is hoping to have it back up and running some time tomorrow (Sunday)," the NWS said on its Facebook page.
Elmhurst Patch.com said the lack of radar came at the same time fog was predicted in the Romeoville area after the storms blew through.
Ray Liotta sues skin care company over use of likeness
Aaron Carter is still in love with Hilary Duff