Jose Maria Canizares is alone in third place at 6-under-par 66, while Bobby Wadkins and Bruce Fleisher share fourth place after opening-round, 5-under 67s.
The start of Friday's round was delayed two hours due to crews cleaning up after Hurricane Isabel came through on Thursday. There was some minor flooding and some trees needed to be removed but everyone in the field completed the opening round.
'If somebody would have just flown in today and not heard the weather report and you told them a hurricane just came through here it would have been hard to believe,' Ahern said.
Officials pushed back tee times and sent out the players on both the first and 10th tees.
Ahern opened on the second nine and promptly made bogey at No. 11. He made up the lost stroke with a birdie at the par-5 12th before adding three more birdies on his first nine.
Ahern, who held the 54-hole lead of last month's Tradition, birdied two of his first three holes on the second nine. He collected a birdie at the fifth and matched Weibring in first with a birdie at the par-5 seventh.
'I would like to keep this pace going,' said Ahern, who won the Music City Championship at the end of May.
Weibring, who is competing in only his 10th event on the Champions Tour, also began his round on No. 10 but got off to a better start than his co-leader. He birdied the 11th and polished off his opening nine with four birdies in a row.
He parred his first five holes on his second nine but dropped a shot at the sixth when he knocked a wedge into the sand at No. 6. Weibring, battling the flu on Friday, closed with three consecutive birdies to post his 65.
'You know the beauty of it is when you're playing golf the way we hope to try to play, you are really focused on one shot at a time and one hole at a time,' Weibring said. 'I had to work a little bit harder mentally on my back side because I wasn't feeling as well, but I was just trying to get three good birdie chances. I wasn't trying to get ahead of myself. Maybe if I felt better I would have been more aggressive and got in trouble.'
Eamonn Darcy, Wayne Levi, Doug Tewell and Fuzzy Zoeller share sixth place at 4-under-par 68. Mike Hill, Leonard Thompson, Hugh Baiocchi, Walter Hall and Ed Fiori are tied for 10th at minus-3.
Hale Irwin and Tom Kite are part of a group at minus-2 while two-time defending champion Bruce Lietzke opened his title defense with a 1-under-par 71.