Prairie and Ontario Snows:
A Low pressure system will bring snow to parts of the Northern Prairies and Ontario this weekend. The rain-snow line looks to set up north of Winnipeg and Saskatoon, though the cold air on the back side of the low could bring some light snows to southern Manitoba and Saskatchewan Saturday night and Sunday. Snowfall amounts will generally be light for Winnipeg where a couple of centimetres of snow will be possible. Areas around Berens River could see 10cm of snow with 15-30+cm of snowfall possible to the north, with the heavy snow band stretching into Northern Ontario as the low treks east.
Southern Ontario will see some showers Sunday as temperatures will be warmer. The low will move east however, and circulate down a much colder airmass. Snow could affect the region in the wrap around behind the low with some lake effect possible. Snowfall amounts of around 5cm could occur, with locally higher amounts if persistent lake effect snow can indeed get going Sunday night. Warmer temperatures will eventually filter eastwards from the Prairies by mid week for the region.
Warming up Next Week:
A warmer airmass is on the way to the Prairies as the weather pattern reverses after a prolonged period of cold air. A strong ridge will build in, bringing sunshine and temperatures that will be well above normal for the region into early next week. A cold front looks to move through later in the week, with another very cold shot of air possible into next weekend.
For Southern Ontario, the warmer temperatures look to arrive mid week, and linger around for quite some time as the ridge sticks over the region. Highs looks to approach the mid teens, much like the Prairies will see earlier in the week.