Winter storm is coming!

News - Major winter storm threatens southern Ontario, up to 35 cm - The Weather NetworkGoogle Tag Manager Data LayerEnd Google Tag Manager Data Layer

StartFragmentMonday, March 13, 2017, 1:07 PM - The snowflakes are already flying in southern Ontario as two powerful low pressure systems are set to collide over the U.S. Eastern Seaboard Monday night, and that spells a lot of active weather on the way.

With the start of spring only a week away, Ontarians from Windsor to Ottawa will be dealing with intense wintry conditions, a widespread snowfall of 15 to 20 cm - more for some - whiteouts, and treacherous driving conditions late Monday through Tuesday.

Environment Canada has issued winter storm warnings for the Niagara region, around the Golden Horseshoe as far as Oakville, and along the north shore of Lake Erie as far as Long Point and Simcoe, where conditions are expected to be worst. A special weather statement extends across the rest of southern Ontario from Windsor to Cornwall.


  • Winds up to 50 km/h Tuesday, gusting to 70 km/h along the shores of Lakes Ontario and Erie will make for poor visibility due to blowing snow

  • Lake effect snow will again be a concern Tuesday night and Wednesday for communities south of Lake Huron

  • Lake effect snow will impact communities on the western tip of Lake Ontario starting early Monday, adding to overall accumulations

  • System moves in Monday, continuing Tuesday (including significant impact to the Tuesday morning commute) and ending through the day on Wednesday

  • Widespread 15-20 cm of snow for the region, including the GTA, with up to 35 cm for Hamilton and Niagara Region and 20 cm or more for the National Capital Region

  • Northern edge of developing U.S. system likely to encompass southern Ontario


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