Ontario's winter forecast is about to be a mess with a "triple threat" of weather heading our way. \nAccording to The Weather Network, a Colorado low, a polar vortex and lake-effect snow are aimed to hit the province this month. \nEditor's Choice: The Polar Vortex Is About To Plunge Down On Canada & Some Parts Will See Lows Of -40 C\n\nDue to the Colorado low, widespread snow and gusty winds will push into Ontario by Thursday evening, with 5 to 10 centimetres expected throughout the southern part of the province. \nHowever, areas up north are expected to see up to 30 centimetres of accumulation. \nThis weekend, the polar vortex is also expected to hit with chilling temperatures. \nParts of Ontario could feel as cold as -16 C by Saturday. \n\nOn top of this, lake-effect squalls are expected to last until next Friday, so make sure to bundle up. \nEnvironment Canada issued a travel advisory this morning, warning drivers of poor road conditions.\n"Untreated roads may suddenly become snow covered and slippery. Motorists should allow for extra time to reach their destination," the agency states.