The Arctic airmass that has settled into the Plains will continue to spread record cold temperatures south and eastward into the Ohio Valley and down into the southern Plains today, November 12. The storm is also affecting Canadian Maritimes since November 11.
The Arctic storm has begun impacting the Canadian Maritimes late Monday, November 11. Wind gusts are expected to be around 50 to 70 km/h (31 to 43 mph), or even higher in parts of Nova Scotia, Newfoundland.
According to the Weather Network, the snow was coming down in earnest across much of New Brunswick in the evening during the same period and will last longest in the area, still falling for some residents by Tuesday evening, November 12.
— My New Brunswick (@mynewbrunswick) November 12, 2019
Locals across the Gulf can expect the snow by Tuesday morning, but largely confined to the western half of the island and heaviest on the Great Northern Peninsula.
Moreover, rain from the overnight will continue into Tuesday morning for most of Nova Scotia, lasting through the day in most areas. In Newfoundland, the heaviest downpours will be in the western portion.
However, a warm front will slide through the region by the morning as it crosses New Brunswick. Locals in southern areas of the province around the Bay of Fundy will experience a switchover to rain. A transition of ice pellets is also likely, especially in central and northern parts, before another possible second round of snow falls into the evening. There will be freezing rain in the western parts of the island by early afternoon.
The said warm front will set the Atlantic region apart of Ontario in Quebec in one other way – it will make temperatures above the freezing point for most of the region.
— Marta Czurylowicz (@martaczur) November 11, 2019
Once the system moves out by Wednesday morning, November 13, there will be a switch in temperatures across Atlantic Canada while most of the Maritimes.
“A system tracking to the north will drag another cold front across the region Friday night and Saturday with rain and snow showers expected once again,” said meteorologist Dr. Doug Gillham.
Meanwhile, according to NWS, widespread record cold is spreading from the Plains eastward toward the East Coast.
Early season snow across western to northern New York and northern New England will eventually diminish during the same period.
Active Lake Effect snows will continue downwind of the Great Lakes.