ABOUT THIS BLOG
Brett Anderson covers short-term and long-term weather and storm forecasts for Canada.
AccuWeather’s Hurricane Week: An inside look at these destructive forc...
How wind shear influences tropical cyclones
15 hours ago
How inhaling wildfire smoke can wreak havoc on your health
10 hours ago
Arctic sea may have ice-free summers by the 2030s, new study warns
22 hours ago
Get AccuWeather alerts as they happen with our browser notifications.
Thanks! We’ll keep you informed.
Weather Blogs / Canadian weather
Coldest stretch of weather in store for eastern North America
By Brett Anderson, AccuWeather senior meteorologist
Published Jan 13, 2022 11:06 AM EDT | Updated Jan 13, 2022 11:06 AM EDT
Latest atmospheric teleconnections and forecast model data are pointing toward an extended stretch of very cold weather from the Prairies to the eastern United States starting around Jan. 20 and persisting through the end of the month.
There will likely be several direct discharges of Arctic air into the regions due to what we call cross-polar flow, which is basically an open highway with no exits that sends very cold air straight from the polar region and through Canada and into parts of the U.S.
These air masses are also usually dry, thus big storms for the Prairies and Midwest are unlikely, but there can be significant outbreaks of lake-effect snow. We will also have to watch the East Coast closely for potential nor'easters which may bring heavy snowfall to Atlantic Canada.
On the flip side, this pattern likely brings more tranquil weather to the West Coast with milder temperatures.
Once we get into February, there is much higher uncertainty, and the pattern may revert more to what we have been seeing in December and early January.