Environment Canada says very strong southwest winds with frequent gusts of 100 to 110 km/h will begin over extreme Southwestern Ontario this morning in the wake of a sharp arctic cold front blasting across the region.
The damaging southwest winds will reach remaining areas by midday.
Wind gusts of 120 km/h are likely in areas along the shores of Lake Erie and Lake Huron.
The damaging winds will continue into this evening, then will gradually start to diminish near midnight, except near Lakes Erie and Huron where they may persist most of the night.
Power outages are possible.
Damage to buildings, such as to roof shingles and windows, may occur. High winds may toss loose objects or cause tree branches to break.
Environment Canada also says there will beĀ poor visibility in local blowing snow this afternoon and throughout the night.
Any fresh snow will be whipped up by the winds creating near whiteout conditions at times in blowing snow.
Conditions will slowly improve early Monday morning as winds begin to diminish.
Travel is expected to be hazardous due to reduced visibility. Visibility may be significantly and suddenly reduced to near zero.