CALGARY (Canada) (AFP) - Suzann Pettersen of Norway defied difficult, windy conditions to shoot a five-under 66 Saturday and take an imposing five-stroke lead after three rounds of the Canadian Women's Open. Petterson, who shared the overnight lead, had a 14-under total of 199, five shots in front of American Angela Stanford, who carded a 69 for 204. Australian Hall of Famer Karrie Webb posted a 68 for 205, with Mexican Lorena Ochoa (72) and South Korean Kim In-Kyung (69) a further shot back on 206. Pettersen is in search of her first LPGA tour victory since 2007, a breakout season in which she won five titles. She came close in Portland last week, losing in a playoff. South Korea's Kim Song-Hee followed her tournament-record nine-under 62, which saw her tied for the lead coming into the round, with a 77 to fall into a tie for 21st. Pettersen's round included six birdies and one bogey. She capped her effort with birdie at the par-five 18th, where her chip from the greenside rough left her a tap-in. "I wasn't expecting those windy conditions," she said. "It was pretty steady wind all the way through, and a little different wind today than the other days. "But it seems like the harder conditions, the more creative I get with my shots and kind of trying to take control of the ball flight, and I keep rolling the putts in." Pettersen led by as many as six for much of the day. Stanford drained a 60-foot eagle putt at the final hole to edge a shot closer. And Stanford knows from her own bitter experience that Pettersen's lead is not insurmountable, having surrendered a four-shot lead in the final round at London Hunt in 2006 to lose the Canadian Open title by a stroke to Cristie Kerr. "I thought about that coming off the tee box here on 18," Stanford said. "You never know." Webb said a big lead can sometimes pose its own problems. "She's out there by herself," Webb said. "And sometimes that's a bit of a daunting task. ... You know you don't have to do anything stupid - attack pins and stuff like that - so sometimes that takes you out of your game plan." But Pettersen said she planned to stay aggressive. "I'm not trying to hold on to anything," she said. "I'm just going to see how low (I) can go."