"The unusually cold air mass that brought record cold across southern Ontario this weekend isn't going anywhere quick," Global News meteorologist Ross Hull said.

The coldest air on the planet will be over southern Ontario and Quebec for a few days centered around Mother's Day weekend.

Snow squall watches and warnings are in place for a swath of southwestern Ontario off of Lake Huron ahead of storms expected to develop Wednesday morning.

Global News Chief Meteorologist Anthony Farnell said humidity values have exceeded 40 in some areas.

According to Environment Canada, mid to high 20s temperatures are forecast between Friday and Monday for Algonquin Park.

Ontarians have had to deal with a swath of wintry weather woes on Monday thanks to Mother Nature.

Environment Canada says 15 to 20 cm of snow and ice pellets are expected in southern Ontario on Tuesday, affecting both the morning and afternoon commute.

Isolated thunderstorms are expected to develop as a result of a cold front, with the main threat being 90 km/h winds, Environment Canada said.

Global News chief meteorologist Anthony Farnell says a storm may be brewing for southwestern Ontario on Tuesday and is expected to head east.

Environment Canada said rainfall could be anywhere from 30 mm to 60 mm over the next two days.