The Mama Grizzly Arctic air blob is coming down to open the season. She is just the first. Right now, all the spillways for the cold are blocked by cyclones, except for Canada.
This is a huge mama!
It has the nice curved front of an air glacier. For Toronto, the lakes will protect us to some extent.
It is just appearing on the regular 7 day forecast.
ps. the mechanism is interesting. These things start as a chaotic cyclone, then the cold bottom sags and detaches, making a stream. The size of the stream is related to the size of the cyclone, and geographic features.
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