The latest blast of wintry weather is associated with a Colorado Low that will track over southern Ontario on Sunday.
The national weather agency is forecasting several hours of freezing rain starting Sunday morning before it transitions to ice pellets mixed with snow and patchy freezing rain early Sunday afternoon.
It says the precipitation is expected to taper off to drizzle or freezing drizzle by Sunday evening with flurries expected overnight.
Some areas will receive 5 to 10 cm of snow and ice pellets in addition to the freezing rain.
Environment Canada says strong wind gusts up to 70 km/h coupled with ice accretion on tree branches and power lines could cause power outages.
It says highways, roads, walkways and parking lots will become icy, slippery and hazardous.