COLORADO SPRINGS, Colo. » When the rain stopped, Stacy Lewis got off a school bus wondering if she was in the U.S. Open or the twilight zone.

By the time the strange ordeal was over Friday, she had lost her lead and was barely hanging onto her cool.

Going for her second major of the year, Lewis made a bogey and double-bogey shortly after a 66-minute rain delay and the lead she held through almost the entire marathon day at the U.S. Women’s Open turned into a two-shot deficit to I.K. Kim.

Kim was at 4 under par with four holes to play when the second round was suspended by darkness. Lewis, who had led by as many as four shots earlier in the day, was tied for second with Wendy Ward at 2 under with two holes left.

“We sat in a school bus,” Lewis said of the way she spent the thunderstorm delay. “It was 20 people in a little school bus. There was no place to go, you couldn’t do anything, it was hard to get loose again. Just kind of unfortunate — unfortunate the way it all worked out, I guess.”

But maybe to be expected during a week that has been interrupted by two afternoon thunderstorms, which has forced backup plans to be replaced by more backup plans.

Only 33 of the 156 players made it through their second round Friday and 66 never made it to their tee time.

Amateur Amy Anderson, who played six holes early in the morning to close her first round, finished the day in the three-way tie for second at 2 under.

Another shot back is Paula Creamer, along with Karrie Webb, who is in a group of four at 1 under who hadn’t teed off.

Ryann O’Toole headed into the break one shot behind Lewis, but she also struggled on the restart. She made three bogeys over the next four holes to fall to even par.

Seeking to complete the career Grand Slam, Yani Tseng couldn’t get going during her day of start-and-stop golf. She was 3 over par with two holes to play.

“I think I was just trying too hard,” Tseng said. “I’m trying to play well, trying to hit it close to the pin. Sometimes when you try harder, the worse you get.”