Webb, however, is among 14 players yet to complete the second round because play was halted about 5 p.m. due to lightning. They are to complete their second rounds Saturday before scheduled third-round play.
Webb played 14 holes, shooting 6-under in moving to 10-under-par for the tournament.
Jiyai Shin, who completed a 6-under 66 in the second round, is tied with Amy Yang for second at 8-under. Yang is 4-under after 14 second-round holes. Caroline Hedwall (65 Friday) and Suzann Pettersen (67) are 7-under after 36 holes. Choi Ne-yeon, 3-under after 14 holes, is also at 7-under for the tournament.
First-round leader Ai Miyazato was among those on the course when play was stopped. She is 1-under through 13 holes and is at 6-under-par for the tournament.
Webb's round started with five pars but she ran off four consecutive birdies to close the front nine at 4-under. She had two more pars before she had an ace at the 188-yard, par-3 12th hole. She had a bogey at 13 before a birdie at 14.