Major Winter Storm Hits Southern Ontario & GTA: 20-30+ cm Snowfall Expected! (2026)

A Winter Storm Warning: Brace for Impact, Southern Ontario!

A significant winter storm is set to blanket Southern Ontario, and it's time to prepare!

Published on January 24th, 2026, at 3:32 PM, this weather alert is a must-read for residents and travelers alike. With potential snowfall ranging from 20 to over 30 centimeters, it's a storm that demands attention.

But here's where it gets controversial: Eastern Canada, including the beautiful Atlantic provinces, is also in the storm's crosshairs. This massive winter storm, originating from the U.S., threatens to bring not just snow but also travel and power disruptions.

For Southern Ontario, the brunt of the storm will be felt near and across the Greater Toronto Area (GTA), the Golden Horseshoe, and the Niagara region. These areas can expect heavy snowfall, with totals ranging from 20 to 30+ centimeters. It's a scenario that could cause significant travel delays and power outages.

And this is the part most people miss: the storm's impact extends beyond just these regions. Southwestern and Eastern Ontario will also experience snowfall, with the potential for 20-30+ centimeters. It's a widespread event that could affect millions.

Yellow-coded winter storm watches and warnings are in place, and for good reason. The weather network advises preparing for rapidly changing and deteriorating travel conditions. If you must travel, allow extra time and be cautious.

If you're planning to travel this weekend, be aware of potential highway and airport delays. It's always better to be safe than sorry, especially with a storm of this magnitude.

So, what's causing this winter wonderland? Ample moisture streaming northward will collide with frigid air draped over Eastern Canada, creating the perfect conditions for heavy snowfall. Ontario, being on the cold, northern side of the storm, will see all precipitation as snow.

The temperatures, ranging from -10 to -20 degrees Celsius, will result in fluffy, fast-accumulating snow. This type of snow is challenging for snowplows, so expect some delays in clearing roads.

The GTA and Golden Horseshoe can expect widespread snowfall of 20-30+ centimeters, impacting major corridors like the QEW, 401, 404, and 407. Snow is expected to begin on Sunday morning, peak in the afternoon and evening, and continue into Monday morning.

Wind gusts of up to 60 km/h are forecast for Sunday evening, creating widespread blowing snow, especially in open areas near Lake Ontario. The placement of the snow bands is uncertain and depends on precise wind direction, which could further impact snowfall amounts.

The snowsquall risk zone stretches from Hamilton to Pickering, including Oakville and Toronto. Under these snow bands, the heaviest totals and whiteout conditions are expected, with the potential for 20-30+ centimeters of snow.

Communities north of the 407, such as London, Barrie, and those heading towards Ottawa, can expect 10-20 centimeters of snow from this system through Monday morning. Eastern Ontario, including Ottawa, can expect 10-25 centimeters, with travel disruptions continuing into early Monday.

Winter travel will be challenging during this storm, especially during peak snowfall. Disruptions are forecast to continue into early Monday morning, so plan your travels accordingly.

The good news is that any snow that falls during this system will stick around due to temperatures remaining solidly below freezing through the end of the month. So, if you're a snow lover, you're in for a treat!

Next week, expect frigid conditions with high temperatures mainly in the minus teens and lows mostly in the -20s. Colder-than-normal temperatures are expected to persist into the first few days of February. However, a return to seasonal temperatures is forecast around February 5th, although a shift back to colder conditions is possible by mid-February.

Stay tuned to The Weather Network for all the latest updates on conditions across Ontario. This storm is a reminder of the power of nature and the importance of being prepared. So, stay safe, Southern Ontario, and enjoy the winter wonderland (from the warmth of your home, of course)!

Major Winter Storm Hits Southern Ontario & GTA: 20-30+ cm Snowfall Expected! (2026)
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