Markham drivers have had to adjust to a different kind of winter weather almost every day this week, from a weekend flash freeze to deep cold and two rounds of snow.

Saturday's flash freeze

Temperatures dropped quickly on Saturday evening, Feb. 21, turning wet roads to ice as blowing snow and freezing drizzle moved through. A freezing drizzle advisory was in effect for Toronto and parts of the GTA.

Collisions were reported across the region. On eastbound Highway 407 near Warden Avenue in Markham, a person who had got out of their vehicle after an earlier crash was struck and taken to hospital with minor injuries, Ontario Provincial Police said. Multiple collisions also closed northbound Highway 404 at Bloomington Road. York Regional Police and Durham Regional Police urged people to stay off the roads.

We've got a flash freeze, multiple closures, collisions.

— Sgt. Kerry Schmidt, Ontario Provincial Police

Schmidt told drivers involved in a crash to move a drivable vehicle off the highway to a safe spot and to stay inside it rather than get out on the road.

Bitter Monday, snowy Tuesday night

On Monday, forecasters called for an overnight low in the mid minus teens in Toronto, with wind chills making it feel like the mid minus 20s.

On Tuesday, Environment Canada issued a special weather statement covering York Region, Toronto, Peel, Durham and other areas as an Alberta clipper swept in. Forecasters called for five to 10 centimetres of snow Tuesday evening and overnight, with the highest amounts expected along the Oak Ridges Moraine north of Markham.

Snow associated with an Alberta Clipper will sweep across the area this evening and tonight.

— Environment Canada

The snow was expected to ease around 3 a.m. Wednesday, with flurries lingering into the morning commute.

Wednesday flurries and what's next

Another special weather statement followed on Wednesday for much of southern Ontario, warning that heavy flurries and wind gusts of up to 50 km/h could suddenly cut visibility and make driving hazardous. In Toronto the statement had ended by mid-afternoon.

In Toronto, Wednesday night was forecast to drop to about -11 C, feeling like -18 with the wind. Thursday should be mainly sunny with a high near -2 C, before a milder, sunny Friday with a high around 5 C.

With temperatures swinging above and below freezing, sidewalks and driveways can turn icy overnight as slush refreezes.