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21 June 2026

Winter weather warning: Heavy snow expected across southern Ontario

A cold front brings heavy snow and strong winds, impacting travel in southern Ontario.

Winter weather warning with heavy snow in Ontario
Prepare for heavy snowfall as winter weather hits Southern Ontario.

Severe weather alert for southern Ontario

As winter settles in, southern Ontario is bracing for a significant weather event. Environment Canada has issued a weather advisory indicating that a large portion of the region will experience a brief but intense burst of heavy snow on Wednesday morning. This weather phenomenon is attributed to a cold front sweeping through the area, bringing with it strong winds and reduced visibility.

Impact on travel and daily life

The advisory covers major urban centers including Toronto, the Greater Toronto Area (GTA), and extends to regions such as Niagara, Guelph, Kitchener, Peterborough, Kingston, and Ottawa. With wind gusts expected to reach nearly 70 km/h, local blowing and drifting snow could severely impact morning commutes. Drivers are urged to exercise caution, as visibility may suddenly drop in heavy snowfall, making travel conditions hazardous.

Environment Canada warns that surfaces like highways, roads, walkways, and parking lots may become icy and slippery. This poses a risk not only to drivers but also to pedestrians. The agency emphasizes the importance of preparing for rapidly changing weather conditions, advising individuals to stay informed and adjust their travel plans accordingly.

Snow accumulation and squall warnings

In addition to the snowfall expected on Wednesday, parts of southern Ontario have already seen accumulations of 5 to 10 cm as of Tuesday evening. Areas from London to Barrie and Owen Sound are under a snow squall warning, where bursts of heavy flurries are anticipated to lead to significant snow squalls off Lake Huron and Georgian Bay. Snowfall amounts in these regions could reach between 15 to 25 cm, further complicating travel and daily activities.

As the winter weather unfolds, residents are encouraged to stay updated on the latest forecasts and advisories. Whether commuting to work or running errands, being prepared for winter conditions is essential for safety. Remember to slow down if visibility decreases while driving, keep an eye out for tail lights ahead, and be ready to stop if necessary.

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