Authorities will make a big push Saturday in their search for a 19-year-old Crawford County man who went missing Monday.

Search and rescue crews have scoured the area around Frog Bayou near Rudy looking for Skylar Combs of Alma who is thought to have drowned while swimming in swollen flood waters Monday afternoon.

"We’ve been searching from daylight to dark all week, from the time the call came in at 3:20 p.m. Monday," said Crawford County Emergency Management Director Dennis Gilstrap.

If Combs is not found Friday, up to 150 law-enforcement personnel, search and rescue crews, volunteers, firefighters, family members and others will search the 25 river miles around where the man slipped under the water, Gilstrap said.

"The big thing is the weather and snakes," Gilstrap. "We need the water to continue to recede."

As long as the weather cooperates, search crews have a better chance of finding the missing man, Gilstrap said. Friday morning Gilstrap said waters had receded 7-8 feet since Monday and were more clear.

River banks and debris piles also are being monitored for signs of the missing man.

Swift water and dive teams from surrounding counties, kayak teams, a state police helicopter, and even the National Guard, will be on hand to help in Saturday’s search, Gilstrap said.

Crews will check in at 7:30 a.m. Saturday morning, and Gilstrap has asked the American Red Cross to provide two meals for each of the expected 150 searchers, he said.

Combs slipped into a swift current near a swimming hole called "Old Grotto" in Frog Bayou while swimming with two other teenagers, a male and female.