By Mark Lamport-Stokes
KOHLER, Wisconsin (Reuters) - The opening round of the 92nd U.S. PGA Championship was certain to spill over into a second day after thick fog delayed the scheduled start by more than three hours on Thursday.
Visibility was limited to less than 50 yards on the practice range despite early morning sunshine at Whistling Straits before the fog finally lifted.
"Once the fog has lifted and it is clear to play, the first starting time will be 30 minutes following that time," officials said.
They added there was no chance of bringing forward the afternoon tee times by any more than half an hour once the morning starters had set off.
Four-times champion Tiger Woods, who has failed to win this season in eight appearances on the PGA Tour, was scheduled to start his opening round from the 10th hole at 1130 (1630).
In other high-profile groupings, 2008 champion Padraig Harrington of Ireland has been drawn with former winners Davis Love III and John Daly while American world number four Steve Stricker will play with Australian Adam Scott and Northern Ireland's Rory McIlroy.
(Editing by Steve Ginsburg)