SOUTHERN PINES, N.C. — Annika Sorenstam stood in the ninth fairway next to her bag, sizing up how far she was from her final hole on a troublesome day at the U.S. Women's Open.

Then came a sound that has become all too familiar. And no, it wasn't a big cheer.

An air horn, the most annoying sound in golf, resonated across Pine Needles yesterday to signal another delay brought on by lightning. Sorenstam bowed her head and walked toward shelter.

No one hit another shot the rest of the day at a tournament that can't seem to get started.

"It's brutal," said Juli Inkster, playing in the group behind Sorenstam. "Now we have to get up at 5 in the morning to play one hole. It's just been start and stop, start and stop. And tomorrow might be worse. It's a crapshoot."

When play was suspended amid the rumble of thunder, only 25 out of 156 players had finished the second round. It was to resume this morning, although USGA official Mike Davis made no guarantees.

Strong storms were expected through the night and into the morning.

Hawai'i's Michelle Wie, who opened with an 82, didn't get past the practice range yesterday.

"This area has gone for weeks on end without any kind of weather. And bring the USGA to town, and it's amazing how we can change weather patterns," Davis said.

The plan was for the third round to begin this afternoon, after the cut had been made.

Not much changed on the leaderboard from Thursday, when there was a 3 1/2-hour delay — an 18-year-old named Park was the clubhouse leader.

It was Angela Park after the first round, although she didn't hit a shot yesterday. Her good friend, In-Bee Park, bogeyed two of the last four holes for a 73 that put her at even-par 142.

She was one shot ahead of Kris Tamulis, who shot 71.

Angela Park could also claim the clubhouse lead, since she rarely left except to warm up on the range. She remains at 3 under.

"I'm just having a good time relaxing at the locker room," she said. "I'm very calm and eager to play the next three rounds."

On the course, nerves were frayed.

Candie Kung tapped in a putt on the 18th hole a split-second before the horn sounded to stop play, so she became the 25th player to complete the second round. Janice Moodie of Scotland also had a tap-in, but under the rules for dangerous weather, she was not allowed to finish. Moodie will return in the morning to putt out, then wait until about 5 p.m. to hit her next shot.

Sorenstam left before speaking to the media, but no doubt she wanted to put this day behind her.

One day after Karrie Webb opened with an 83 for the worst score of her career, Sorenstam looked as though she might join her.

She finished off a 1-under 70 in the morning, then after a quick turnaround, began her second round with a double bogey when a chip up the slope on the 10th hole came back to her feet. She blew another chip some 18 feet by the hole, found the bunker with a sand wedge on the par-5 15th and went out in 42 to fall off the leaderboard.

Sorenstam was 7 over through 10 holes until she steadied herself, and a birdie on No. 8 brought her to 5 over for the tournament.

Alexis Thompson, the 12-year-old from south Florida who became the youngest qualifier in history, chipped in for birdie from 40 yards to complete a respectable 76 in the morning, but her round got away from her in the afternoon. She was 12 over with five holes remaining, including some of the toughest at Pine Needles.

"It's pretty cool, being here another day," she said.