Forecasters say the storm from Texas that arrived over southern Ontario Friday is expected to be followed by another “more potent” one later on Saturday.
“An ice storm will be possible across a large swath of southern Ontario,” Environment Canada said in a special weather statement issued late Friday night.
“It is very likely that holiday travel will be significantly impacted,” the statement added. There is also a chance the weather could cause power outages.
Environment Canada admitted, however, to some uncertainty about the storm's direction and that any change will alter what sort of precipitation falls.
Freezing rain warnings remained in effect for much of southern Ontario late Friday after the region was hit — on the busiest travel day of the year — with a mix of snow, rain and other icy, inclement precipitation.
"The next few days are not looking good for travel," CBC meteorologist Claire Martin reported Friday, though she noted the slightly warmer temperatures in Toronto could spare the city from the worst of an ice storm.
"It's not like you can avoid certain highways and hope that they'll be dry and fine," said Martin. "You're into snow to the north of this system and rain to the south. So it's going to be messy.”
The Ontario Provincial Police say travellers heading out on the highways will have to pay attention to road conditions, slow down and leave extra time to reach their destination.
Air Canada and WestJet are warning passengers of further delays on Saturday if the weather worsens. Air Canada has also waived fees for passengers who change their flight plans due to weather.