EE REPORTED FOR WORK AT 0945. IT WAS A STORMY NIGHT. WHEN HE EXITED HIS TRUCK, HE SLIPPED ON A PATCH OF ICE. HE GRABBED THE DOOR OF THE TRUCK AND TWISTED HIS BACK. HE DID NOT FALL. THE INJURY WAS REPORTED TO A RELIEF SUPERVISOR WHO DID NOT COMPLETE A REPORT. IT WAS JUST REPORTED TO MGMT/N AS A WORK INJURY OF 1-24 WHICH IS WHY THE REPORT IS LATE.