Winter Storm Warning for Oakville, Burlington, Hamilton, Haldimand, Caledonia, Dunnville, Grimsby, St. Catharines, Welland, and Niagara Falls:
Winter storm conditions expected today and tonight.
Snow at times heavy and blowing snow are expected to develop early this morning and taper off overnight.
Although the storm system responsible will track well to the south of the Great Lakes, northeast winds off Lake Ontario will pick up extra moisture resulting in higher snowfall totals. Snowfall accumulations of 15 to 25 cm are expected. Snowfall amounts should be considerably less for areas north of Hamilton and Burlington.
In addition, strong northeast winds gusting to 60 km/h will generate widespread blowing snow and cold wind chill values near minus 20. Near zero visibility is likely at times.
Consider postponing non-essential travel until conditions improve. Surfaces such as highways, roads, walkways and parking lots may become difficult to navigate due to accumulating snow. Visibility will be suddenly reduced to near zero at times in heavy snow and blowing snow.
There is also an Extreme Cold Warning in effect for Kitchener, Waterloo, Cambridge, Guelph, Mississauga, and areas north:
A period of very cold wind chills is expected.
An arctic air mass is forecast to begin to move into Southern Ontario today. Wind chill values are expected to fall to close to minus 35 overnight tonight, and overnight Sunday. Wind chill values overnight Monday are expected to be close to minus 30.
Conditions will improve by Tuesday when a milder airmass moves in.
Risks are greater for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter.
Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill.
If it’s too cold for you to stay outside, it’s too cold for your pet to stay outside.
Extreme cold warnings are issued when very cold temperatures or wind chill creates an elevated risk to health such as frost bite and hypothermia.
The rest of Southern Ontario is under a Special Weather Statement:
Snow and very cold temperatures expected this weekend.
Southwestern Ontario will be on the northern fringe of a major winter storm tracking well south of the Great Lakes this weekend.
Periods of snow associated with this system will continue until this evening. The latest analysis continues to suggest that snowfall amounts will range from 10 to 15 cm near Lake Erie to 2 to 5 cm north of Highway 7.
Areas close to Lake Huron are also likely to receive additional snowfall accumulations on Sunday due to snow squalls.
Accumulating snow could make travel difficult over some locations. Also, surfaces such as highways, roads, walkways and parking lots may become icy and slippery.
Cold temperatures and moderate winds of 30 gusting to 60 km/h will accompany the snow resulting in some blowing snow as well as wind chill values near minus 20 today. Even colder wind chill values approaching minus 30 are possible Sunday into Monday morning.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm.
Information and Image from Environment Canada