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  • Writer's pictureAdvance Weather

STORM WATCH: December 15-17, 2022

Updated: Dec 17, 2022

LAST UPDATE: 5:55 AM, December 16 2022

NEXT UPDATE: 5:00 PM, December 15 2022



A low pressure system will move into Southern Ontario on Thursday, bringing multiple types of precipitation to the region as well as strong wind gusts.

Extreme Southwestern Ontario will see mainly rain with this system, beginning early Thursday. There will be little impact aside from strong wind gusts, which will begin early Thursday as well and last through most of the day.

Southwestern and Central Ontario will see freezing rain throughout the day on Thursday, beginning early in the morning. Slippery surfaces including sidewalks and roads are expected. Strong wind gusts are expected through these areas as well. Some areas may see wind gusts of up to 100 km/h.

Eastern Ontario will see heavy snow throughout this event. Snow will push east throughout the day on Thursday and will persist through Friday as the system stalls. Wind gusts of up to 80 km/h are possible late Thursday into Friday. Blowing snow is expected due to the strong wind gusts. The snow will slowly end on Saturday as the system moves away from the region.

Due to the strong wind gusts, power outages will be possible, especially in areas where freezing rain occurs in addition to the strong wind gusts. Road closures are possible on Friday as heavy snow continues throughout Friday in Eastern Ontario, in addition with the blowing snow due to strong wind gusts.

Rainfall Outlook

Extreme Southwestern Ontario will see most of the rain for this event, however areas further to the east will still see some rain.

10 to 20 mm: Windsor, Leamington, chatham, Sarnia, St. Thomas, Simcoe, St. Catharines and Welland.

5 to 10 mm: London, Woodstock, Brantford, Kitchener, Hamilton, Oakville and Georgetown.

Trace to 5 mm: Goderich, Kincardine, Wiarton, Tobermory, Orangeville, Barrie, Oshawa and Toronto.

Freezing Rain Outlook

The main area of freezing rain is expected to impact the Kitchener-Waterloo area, while surrounding areas will see a less of an impact. Ice pellets are also possible as the precipitation transitions. Slippery surfaces are still expected in areas where little freezing rain is forecasted.

6 to 8 mm: Kitchener, Stratford, Waterloo and Listowel.

4 to 6 mm: Goderich, Hanover, Shelburne, Orangeville, Brantford and Hamilton.

2 to 4 mm: London, Woodstock, Kincardine, Toronto and Oakville.

Trace to 2 mm: St. Thomas, Simcoe, St. Catharines, Wiarton, Owen Sound, Barrie and Markham.

Snowfall Outlook

The bulk of the snowfall is expected over Eastern Ontario through Saturday. Areas to the west will see a greater impact from the freezing rain, ice pellets and rain. Local snowfall amounts may be greater.

25 to 30 cm: Belleville, Kingston, Brockville, Cornwall, Renfrew and Ottawa.

20 to 25 cm: Cobourg, Peterborough, Bancroft and Barry's Bay.

15 to 20 cm: Oshawa, Port Perry, Haliburton and Algonquin Park.

10 to 15 cm: Toronto, Newmarket, Barrie, Midland, Orillia, Bracebridge, Parry Sound and Huntsville.

5 to 10 cm: Oakville, Georgetown, Orangeville, Shelburne and Collingwood.

Trace to 5 cm: Tobermory, Wiarton, Owen Sound, Kincardine, Hanover, Listowel, Stratford, Kitchener, Brantford and Hamilton.

Wind Outlook

Areas just off Lake Huron will see the strongest wind gusts early Thursday morning. Strong winds are also possible on Friday. A Wind Outlook will be issued for Friday if deemed necessary.

90 to 100 km/h: Goderich, Kincardine, Listowel, Hanover, Owen Sound and Collingwood.

80 to 90 km/h: Kingsville, Point Pelee, Leamington, Rondeau Park, Grand Bend, London, Stratford, Orangeville, Barrie, Midland, Wiarton and Tobermory.

70 to 80 km/h: Windsor, Chatham, Sarnia, St. Thomas, Woodstock, Kitchener, Newmarket, Orillia and Bracebridge.

60 to 70 km/h: Simcoe, Brantford, Oakville, Toronto, Oshawa, Cobourg, Peterborough, Bancroft and Parry Sound.

50 to 60 km/h: St. Catharines, Welland, Belleville, Kingston, Brockville, Cornwall, Ottawa and Renfrew.

School Bus Cancellations

Closings and Cancellations

Road Closures

No data has been posted.


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