LANCASTER — Atop the leaderboard, veteran Karrie Webb and second-year LPGA Tour player Marina Alex did their best to temper expectations at the U.S. Women’s Open.

Both early starters opened with a 4-under-par 66 on Thursday, and that score held up through the afternoon before things turned wet and windblown. Play was suspended in the early evening after a storm packing high winds, lightning and heavy rain pounded Lancaster Country Club.

The sudden halt to the action with 55 players needing to complete their rounds — with at least two threatening the lead — left Webb and Alex as unlikely co-leaders.

The USGA’s plan is to restart the first round at 6:45 a.m. Friday and begin the second round at 7:15.

Amy Yang was in the clubhouse a shot behind the leaders. Two players on the course were also at 3 under: Na Yeon Choi, the 2012 U.S. Open champion, had three holes to play, while Jane Park had five.

Top-ranked Inbee Park birdied two of her last three holes before play was stopped and was at 2 under through 14. Morgan Pressel and six other morning starters shot a 2-under 68.

The 40-year-old Webb reeled off four birdies on her second nine holes and finished with her first score in the 60s in a U.S. Open since 2001, when the Australian won the tournament for the second straight year.

The seven-time major champ started on the back nine and reeled off 10 straight pars before making her move with birdies at the second, fourth, sixth and eighth holes.