Parts of southern Ontario are bracing for severe winter weather following the issuance of flash freeze warnings by Environment Canada. The warnings, declared on February 28, 2025, highlight the dramatic drop expected as temperatures plummet, affecting communities near Lake Huron and Georgian Bay.
The Ministry issued the flash freeze warning shortly after 6:30 p.m., stating significant temperature declines are anticipated near midnight due to the arrival of a sharp cold front. Areas such as Stratford, Owen Sound, Tobermory, Goderich, and Kincardine are particularly under scrutiny, with icy conditions affecting highways, roads, walkways, and parking lots as any ponding water and precipitation rapidly freeze.
“Take extra care when walking or driving in affected areas,” Environment Canada warned. The agency also advised residents to be prepared for changing road conditions.
Weather advisories were echoed later as southern Ontario faced the potential of heavy snowfall alongside the flash freeze conditions. By Friday evening, March 1, areas outside of Toronto were warned of accumulating snow, with reports predicting up to 10 centimeters of snow as heavy flurries were expected. Snow was predicted to be especially intense around Vaughan, Markham, Oshawa, and Peterborough.
The “Alberta Clipper” system was identified as the major weather front responsible for these conditions, moving eastward to southern Ontario. Early reports suggested snowfall rates might peak at two to four centimeters per hour, necessitating careful navigation through hazardous travel conditions.
“Snowfall accumulations are expected to be significant, with some areas potentially receiving 15 centimeters,” reported Environment Canada meteorologist Steven Flisfeder, noting travel could become difficult due to poor visibility.
On March 1, southern Ontario will see cloudy skies accompanied by flurries throughout the morning and afternoon hours. Daytime temperatures are projected to hover around -8 degrees Celsius but could feel as much as -16 degrees Celsius due to wind chill factors. The evening forecasts indicate temperatures will plunge to -17 degrees Celsius, reaching down to nearly -30 degrees Celsius overnight.
“There’s the risk of frostbite for those exposed to these frigid temperatures,” Environment Canada warned, with special mention to regions like Orillia, Kingston, Peterborough, and Parry Sound.
The City of Toronto is taking proactive measures to combat the weather. Snow removal operations have been fully resumed after significant salting and plowing was carried out over the weekend. According to city officials, since the commencement of snow removal on February 19, over 154,279 tonnes of snow have already been cleared. An additional 14,272 tonnes were removed just after Thursday.
To facilitate these operations, the city has declared its major snowstorm policy, which imposes restrictions on parking on designated snow routes. This declaration will remain until snow removal is fully completed, enabling crews to navigate clearing efforts more freely.
Warming centers throughout the city will also remain open tonight to offer shelter for those seeking refuge from the cold. Locations include facilities at 136 Spadina Road, 55 John Street, 75 Elizabeth Street, 12 Holmes Avenue, and 885 Scarborough Golf Club Road, providing meals, restroom facilities, and warm resting areas.
Travellers should also be aware of the impact weather has on transportation. At Toronto Pearson International Airport, preparations are underway for incoming snow. According to airport officials, “Our Surface Maintenance Specialists are prepared to clear the runways, and our de-icing crews are ready to treat planes before departure.” It was noted, too, there would be traffic management initiatives beginning early afternoon to manage the expected surge of travelers, as conditions are likely to fluctuate.
Passengers are strongly encouraged to check their flight status prior to leaving for the airport, ensuring they are informed of any potential delays or cancellations related to the weather.
This weekend will be characterized by fluctuatory winter conditions, as Sunday offers residents a slight reprieve with predictions of sunshine and clouds—a frigid high at around -6 degrees Celsius is slated, with nighttime lows near -10 degrees Celsius.
With forecasts indicating continued volatility and severe temperature plunges, it is imperative for residents of southern Ontario to remain vigilant and prepared for the conditions to come.