Those in the Maritimes began the weekend wearing shorts and T-shirts, but, by the time Sunday concludes, they will be covered in much warmer clothing.
A cold front put a drastic end to the record-breaking warmth with a nasty reality check that will bring about single-digit highs and the first snowfall of the season by early this week, including on Halloween.
Parts of New Brunswick, Nova Scotia and P.E.I. could locally see 5-10 cm of snowfall by the time the system wraps up.
Cooler-than-seasonal temperatures are expected to continue well into the second week of November, as well.
Temperatures to take a big tumble, preceding the first snowfall of the season for many
Following the record-breaking warmth on Saturday, a potent cold front will slice across the region Sunday, sending temperatures plummeting -- by as much as 15°C. Some areas are forecast to see only single-digit highs.
By Monday, as an active pattern sets up over Eastern Canada, conditions will become prime for some of the first snowfalls of the season.
A low-pressure system will develop in the U.S. Northeast on Monday, and will track south of the Maritimes. A northwesterly wind will usher in even colder air to the northern Maritimes.
Because of the below-seasonal temperatures, New Brunswick, northern and eastern parts of Nova Scotia, and P.E.I., will likely see their first snow of the season.
However, with colder temperatures and the track of the system, many regions north of the Fundy Shores in New Brunswick will see accumulating snowfall, as well as the North Shore and Cape Breton regions of Nova Scotia. We can't forget about Newfoundland, either, with the snow threat eyeing St. John's Monday night into Tuesday.
Accumulations aren't projected to be whopping by any stretch of the imagination, but New Brunswick, eastern Nova Scotia and local areas in P.E.I. could see 5-10 cm, with 1-5 cm anywhere else that will see snow.
While the southern Maritimes could see some flurries, but is more likely to see rain at this point in time, as the snowfall will be highly elevation dependent. Travel routes such as the Cobequid Pass, Mount Thom and Cape Breton Highlands will naturally see the bulk of the snow across the province.
We'll also watching the potential for a significant storm for Atlantic Canada during the middle of the week, one that would bring the threat for additional wet snow.
Be sure to check back for the latest weather updates across Atlantic Canada.