Lauren Coughlin fired an impressive three-under par 69 in tough conditions on Friday to build a five-stroke lead midway through the LPGA Aramco Championship in Las Vegas, Nevada.
Coughlin had six birdies and three bogeys as she matched the low round of the day at Shadow Creek, where her eight-under par total of 136 put her five clear of Ireland's Leona Maguire and South Korean Kim Hyo-joo.
Coughlin, who finished runner-up to Madelene Sagstrom when the tournament was a match play event last year, said she played "really, really good" in "really difficult" conditions.
"The wind was kind of swirling at times and a lot of crosswinds," she said. "Very difficult. The greens firmed up as they do in the afternoon, especially with the wind.
"But, yeah, really, really solid round. Had a lot of fun out there. Looking forward to the weekend."
Maguire had four birdies and three bogeys in her one-under 71 and was joined on three-under 141 by Kim, who is coming off back-to-back LPGA victories at the Founders Cup and Ford Championship.
Kim had a double bogey and three bogeys but nabbed the last of her four birdies at the par-five 18th to complete a one-over 73.
"Going out, we knew it was going to be tough," Maguire said. "Obviously a lot windier, different wind than we got all week as well, which made some holes play quite a bit longer.
"We knew we were going to get the firmer end of the greens this afternoon, so just a case of staying extremely patient."
Despite the testing conditions, Maguire welcomed the test posed by Shadow Creek.
"It's a fantastic golf course," she said. "It's one of the best courses we play all year."
As a dual member of the LPGA and the Ladies European Tour she was relishing this week's co-sanctioned event, which is part of the Saudi-backed Global Series and features a total purse of $4 million with a $600 000 winner's prize.
"This is a huge event for both tours," Maguire said. "Outside of the majors this is one of the biggest there is and a huge opportunity for everyone early in the year to do well."
The field features all of the top 20 in the world rankings.
World No 2 Nelly Korda headlined a trio sharing fourth on two-under 142.
Korda carded a two-over 74 and was tied with Denmark's Nana Koerstz Madsen and overnight co-leader Miyu Yamashita of Japan.
Koerstz Madsen carded a two-under 70 while Yamashita, the reigning Women's British Open champion and last year's LPGA Rookie of the Year, posted a three-over 75.