A snow squall warning for Toronto was downgraded to a watch on Thursday night.
The watch extends into Friday morning.
Snow squall warnings remain in effect for Hamilton, Halton-Peel and York-Durham.
“Locally heavy snow flurries in the area may become more organized overnight and Friday morning, forming snow squall bands,” Environment Canada said.
Thursday’s blustery conditions were a dramatic turn from a day earlier when Toronto and the GTA basked in record-breaking warmth. Toronto broke a warm-weather record when the temperature surpassed the 9.1 C record set in 2006.
The dramatic shift in temperature to below freezing led to a slippery morning commute for GTA drivers, some who took to Twitter to complain that the city was ill-prepared for the conditions.
City salt trucks apparently didn’t treat some major roads, including the Gardiner Expressway, ahead of Thursday morning’s commute. The slippery conditions forced police to close the westbound collector lanes of the highway around Islington Avenue for about an hour during the morning rush.
Trucks then salted the slippery lanes, which reopened around 8:30 a.m.
Peel police reported more than two dozen collisions during the morning rush hour, including a three-vehicle crash at Goreway Drive and Deerhurst Drive in Brampton that sent a two-year-old boy to hospital with a serious head injury.
A collision also closed westbound Lake Shore Boulevard West at Ellis Avenue for most of the morning rush.
Check the latest forecast here.