Wintry weather will reappear in southern Ontario Thursday night after a brief reprieve with much milder temperatures and rain earlier this week.
A widespread 2-5 cm is possible from Thursday overnight into Friday, with some higher amounts likely for the western GTA due to some lake enhancement.
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Brace for slower commute times on Friday as roads will be slippery due to the snowfall.
Following that, a noticeable temperature drop into the negative digits will be among the coldest air of the season, and even year, for the region so far.
A clipper from the Prairies moves into the Great Lakes, resulting in an all-snowfall event across southern Ontario late Thursday night through Friday.
A widespread 2-5 cm of snow is expected, but parts of the GTA could see some higher totals possibly exceeding 5 cm with help from Lake Ontario.
The system will track south of Ontario, forcing an easterly wind off Lake Ontario. This set up could bring a stronger band of snowfall to places like Burlington, and to the west end of the GTA, where locally over 5 cm may fall.
This blast of snow could affect Friday travel along major routes including the QEW, Don Valley Parkway (DVP), and the Gardiner Expressway, so make sure you brace for slower commute times.
This weekend will bring our coldest weather of the season thus far as Arctic air is forced eastward. Saturday and Sunday wind chills will be in the negative teens in the GTA, and down to the -20s in cottage country.
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Next week will feature quite a warming trend.
We are closely watching a relatively weak system and warm front, which is expected to impact the region during Christmas Eve and possibly into Christmas Day. This will not be a major storm, but the timing relative to Christmas makes this a more interesting story.
This could bring us a coating, perhaps a few centimetres, of wet snow, but there is also a significant risk for a changeover to rain as temperatures rise above freezing, especially for more southern areas.
Mild temperatures will dominate the final week of December with the potential for a couple of low-pressure systems that will bring rain, or possibly a messy mix of precipitation. However, winter is not over. A colder pattern is expected to develop during the first week of January and dominate through the middle of the month.
Be sure to check back for all the latest on conditions across Ontario.
