CHICAGO (CBS)– Crews are searching for a missing South Bend teen who went missing in Lake Michigan near Michigan City Saturday evening.

Mason Rahem

According to Indiana officials, witnesses said they saw Rahem Mason, 17, in the water near the beach. Witnesses told officials they saw Rahem go under under the surface and did not see him above the surface again.

High waves prevented an initial search by SCUBA divers. A U.S. Coast Guard helicopter conducted a search by air.

“The incident occurred after normal swimming hours and the water had been closed throughout the day due to dangerous waves and currents,” Indiana officials stated in a press release.

The search for the missing teen resumed Sunday morning.

The National Weather Service issued a warning for Lake Michigan beaches and shoreline in Lake and Cook counties due to high winds.

In Chicago, red flags are waving in the wind, warning beach-goers to stay out of the water. At North Avenue beach, the lifeguard captain reminded his crews to keep a close eye on anyone attempting to swim.

Saturday afternoon, lifeguards saved a man from the water at Promontory Point.