A powerful winter storm expected to move through Ontario late Sunday into Monday could rapidly intensify, raising concerns about dangerous winter weather across much of the province, including southern Ontario.
Instant Weather Ontario warned in a post on X (formerly Twitter) that the storm system may strengthen rapidly as it tracks through the Great Lakes — a process known as a “bomb cyclone.” This occurs when a storm’s central pressure drops dramatically over a short period of time, often resulting in extreme weather conditions.
According to meteorologists, bomb cyclones are commonly associated with strong winds, heavy snow, freezing rain and widespread disruptions.
What to Expect
Updated forecasts from Environment Canada indicate an increased risk of blizzard-like conditions, damaging winds and significant snowfall in parts of Ontario. Freezing rain and the possibility of a flash freeze are also being monitored closely.
Areas within the Golden Horseshoe, including Mississauga, Brampton, Halton, Hamilton and Durham Region, are expected to be impacted, though conditions will vary depending on location.
Meteorologists warn that freezing rain may transition to rain Sunday afternoon and evening, followed by plunging temperatures and strong winds on Monday. This combination could create hazardous road conditions and localized power outages.
Wind, Rain and Snow Risks
- Wind gusts of 70 to 100 km/h are possible, especially near Lake Ontario
- Rainfall totals of 20 to 40 millimetres could cause localized flooding in low-lying areas
- Rapid cooling behind the storm may result in icy roads, blowing snow and reduced visibility
Environment Canada also notes that snow squalls may develop later Monday and persist into Tuesday, particularly east of Lake Huron and Georgian Bay.
While the heaviest snowfall — potentially up to 50 centimetres — is more likely in northern Ontario, southern Ontario and the GTA could still experience significant travel disruptions due to ice, wind and rapidly changing conditions.
Forecasters say additional weather alerts and updates are expected as the storm system continues to develop.
Photo Credits : Insauga
