The pair had a one shot lead over Na Yeon Choi, Amy Yang and Jane Park when weather halted play just after 6.00pm local time.
Webb, who has seven major titles to her name, the last of which came nine years ago at the Kraft Nabisco, recorded a bogey free round of 66.
Perhaps some of the reason for her early success came from Webb's liking of the layout.
"I liked it the first time I saw it," said Webb after her round. "Visually off the tee, it's a beautiful golf course. You see what you've got to do. You've got the shape the ball both ways off the tee, and you've got to hit some quality iron shots. I think the course was set up great today. I was waiting on the 8th tee, I used every club in my bag except the 6-iron. When they set up a course like that to use every club, it's a good setup."
Webb has had a slow start to the year by her standards but has often shown the capacity to play the big events and the tough golf courses well.
Minjee Lee was 1 over through 14 holes when play was called.
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