Environment and Climate Change Canada issues Winter Storm Watches and Warnings for Ontario based on the following criteria:
- Winter Storm Watch: When conditions are favourable for the development of severe and potentially dangerous winter weather, including:
- A blizzard;
- A major snowfall (25 cm or more within a 24 hour period); and
- A significant snowfall (snowfall warning criteria amounts) combined with other winter weather hazard types such as: freezing rain, rainfall (over coastal BC only), strong winds, blowing snow and/or extreme wind chill.
- Winter Storm Warning: When severe and potentially dangerous winter weather conditions are expected, including:
- A major snowfall (25 cm or more within a 24 hour period); and
- A significant snowfall (snowfall warning criteria amounts) combined with other cold weather precipitation types such as: freezing rain, strong winds, blowing snow and/or extreme cold.
Note: Blizzard conditions may be part of an intense winter storm, in which case a blizzard warning is issued instead of a winter storm warning.
You can receive local weather alert information by downloading the WeatherCAN app or you can check local weather and forecasts online at www.weather.gc.ca
Heavy snowfall and ice can make the roads treacherous. Check travel conditions at www.511on.ca before setting out on the road.