MONTREAL - Championship points leader Sebastian Vettel won another pole position on Saturday, outracing a pair of Ferraris and a looming rainstorm to record the top qualifying lap at the Canadian Grand Prix.

The Red Bull driver, who won five of the first six Formula One races this season, posted a fastest lap of 1 minute, 13.014 seconds after crashing in the first practice session. He was followed by Ferrari's Fernando Alonso and Felipe Massa.

"I just hope it doesn't become a habit to crash the car on Friday and win the pole on Saturday," Vettel said. "We are here to ride the cars to the limit. Mistakes can happen; surely it is better when they happen on Friday. But it is not fun to come back to the garage without your car."

Fourth in the grid is the other Red Bull car driven by Mark Webber, whose speed-boosting KERS system did not work and did not race at all in Saturday morning's practice.

Lewis Hamilton, who has won two of the last three races for McLaren, was fifth in qualifying.

If it rains Sunday, it would be the first time this season that a Formula One race has been run on a wet circuit.