Moderator, Air Canada; FlyerTalk Evangelist
Join Date: Feb 2015
Location: YYC
Programs: AC SE MM, FB Plat, WS Plat, BA Silver, Marriott Plat, Hilton Gold, Accor Gold
Posts: 18,990
I wouldn't worry. If your inbound is late due to storms around the airport, your outbound will probably also be late.
And if you miss it, UA and AC have 5 more direct flights after the one you're booked on. Just hope that J isn't booked solid.