She called her bogey on the first hole "a terrible bogey. I just kind of told myself I'm not doing this"
She birdied No. 2, then pitched in for an eagle on 3, and she was on her way.
"I didn't make any birdies on the back nine, but I'll take a 65," said Creamer, who hasn't won in two years. "This was a big confidence booster for me."
Munoz liked her round, which included seven birdies and a bogey on the always tough No. 8.
"Everything was working well. I hit a lot of fairways and I was hitting a lot of good drives," she said. " I hit, I think, 17 greens."
Hjorth was the only afternoon golfer in the runner-up group.
"I played solid today. I made a couple of really good par saves," she said.
She also had an eagle on the par-5 15th by hitting a 3-wood from 220 yard to within a foot of the pin.
When play was suspended at 12:24, only 20 golfers had finished their rounds. And in the system where the field is split in two with half the field playing in the morning and the other half in the afternoon, at least 50 hadn't teed off.
Most of the golfers took the delay in stride.
On Twitter, Sophie Gustafson said "Gotta love when weather delay happens just in time for lunch."