Only three cars dipped into the 1:16s by the end - Franchitti, Dixon and Power - but the top six were within a quarter of a second of each other and one second covered the top 18, indicating that it will be a close-fought qualifying session very much dependent on what the weather does in the meantime, with some forecasts suggesting that more showers may hit the area during the day.
Qualifying for the Edmonton Indy takes place later on Saturday at 1pm local time (8pm BST), with the race itself on Sunday at 12:45pm (7.45pm BST, shown live in the UK on Sky Sports
Full practice 3 times
from Saturday morning are now available.
Friday's practice 2 times
Friday's practice 1 times