Motorists should be prepared for difficult driving conditions on Thursday, especially on exposed stretches of highway, forecasters warned.
The winds might also damage roofs, windows and could bring down trees and branches, raising the possibility of power outages. Much of Toronto spent last Christmas without electricity after an ice storm brought down lines across the city.
Winds at 60 km/h, with gusts of up to 90 km/h, will arrive suddenly tonight as a cold front moves east from the Windsor area, according to forecasters. The winds are expected to ease off on Thursday morning, though high gusts are expected in exposed areas, near the Great Lakes and on high ground.
Thursday will also bring a 40 per cent chance of showers, and a high of about 4 C.