
Toronto’s biggest snowfall of the season—more than 20 cm—had a major impact on operations at Toronto Pearson. The storm triggered 343 flight cancellations and 535 delays yesterday (15JAN), according to FlightAware.
Now, challenging weather conditions at several major US hubs are contributing to YYZ delays today.
“Snow and ice could slow flights at Chicago O’Hare, Chicago Midway, and Minneapolis–St. Paul. Strong winds may cause delays in Florida, New York, Washington, D.C., Philadelphia, and Charlotte. Low clouds could affect operations in Seattle,” according to an FAA traffic report reposted by Pearson.
More snow is also expected in the Greater Toronto Area, with a more than 50% chance beginning shortly after 2 p.m. EST and continuing on and off into the evening.
YYZ said in a post this morning that its snow-clearing crews, busy yesterday, are "already gearing up for the next round of snowfall, with another few centimetres possible tonight.”
Passengers are being advised to check their flight status.

As of 6:25 p.m. EST, FlightAware shows 462 delays and 134 cancellations at Pearson. There are 169 delays within, into, or out of the US at Pearson, and 51 cancellations.
YYZ departures are delayed an average of 50 minutes.
Pearson is expecting 127,129 travellers through its terminals today, with 40% passing through Terminal 1.
