Highway 400 closure in effect north of Toronto due to 'extreme winter weather'
Ontario Provincial Police have closed a portion of Highway 400 north of Toronto following multiple collisions due to whiteout conditions.
The highway is closed between Mapleview Drive and Highway 89.
"Multiple collisions in the area; near zero visibility; blowing snow; lots of wind; dangerous conditions here. Crashes are happening all up and down that area. If you don't need to be on the roads, please stay off the highway," OPP Sgt. Kerry Schmidt said in a video posted to Twitter.
It is not immediately known how many crashes have occurred, and there is no word on injuries.
A snow squall warning is in effect in Barrie.
"Snow squalls off Georgian Bay will continue to affect portions of the region through this evening. Heavy snow combined with northwesterly winds gusting 50 to 70 km/h could produce near-zero visibility at times," Environment Canada said in its advisory.
The agency said the area could see 15 to 25 centimetres of snow. Conditions are expected to improve in the evening as snow and winds taper off.
CTVNews.ca Top Stories
Military under fire as thousands of troops face lost cost-of-living allowance
The Canadian Armed Forces is under fire for its plan to cut thousands of troops off a cost-of-living allowance without much notice.

Twitter: Parts of source code leaked online
Some parts of Twitter's source code -- the fundamental computer code on which the social network runs -- were leaked online, the social media company said in a legal filing on Sunday.
U.K. report: Black kids 6 times likelier to be strip-searched by police
Black children in England and Wales were six times more likely to be strip-searched by police, according to a report being released Monday that found children were failed by those sworn to protect them.
Burial plots in Metro Vancouver are now so expensive, they’re being compared to real estate
Burial plots have become such a hot commodity in Metro Vancouver, one spot in a Burnaby cemetery is being sold privately online for $54,000.
Court hearing for Prince Harry and Elton John's privacy case against U.K. publisher
The first hearing in a lawsuit brought by Prince Harry, singer Elton John and other high profile figures against the publisher of the Daily Mail newspaper over alleged phone-tapping and other breaches of privacy, is due to begin on Monday.
All 7 Pennsylvania chocolate factory explosion victims found
All seven bodies have been recovered from the site of a powerful explosion at a chocolate factory in a small town in eastern Pennsylvania, officials said.
Singh 'not satisfied' with confidence-and-supply agreement
NDP Leader Jagmeet Singh says he's 'not satisfied' with his party's confidence-and-supply agreement with the Liberals — signed a year ago this week — because it's shown him he could do a better job running the country than the current government.
North Korea test-fires 2 more missiles as tensions rise
North Korea fired two short-range ballistic missiles into its eastern waters Monday, continuing its weapons displays as the United States moved an aircraft carrier strike group to neighbouring waters for military exercises with the South.
Is the David porn? Come see, Italians tell Florida parents
The Florence museum housing Michelangelo's Renaissance masterpiece the 'David' invited parents and students from a Florida charter school to visit after complaints about a lesson featuring the statue forced the principal to resign.