8am, Sunday 12-14-25 below
This map below is constantly updated:
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The recent Jet stream has featured a cross polar flow spreading frigid air masses from Siberia(coldest on the planet right now), across Canada, then into the United States. This is the 200 mb map around 35,000 feet)
Here's the new pattern below. This is 1 week from today on 12-20-25. Mild, Pacific(oceanic) air masses will spread from west to east across much of the country. Bitter cold will continue to pool in Canada and some of that will leak/ooze just south of the US border, undercutting the main jet stream in the lower levels but that cold will not have much push to penetrate very far south as it moderates over bare ground.
The Polar Vortex will be anchored just northwest of the Hudson Bay in Canada. Canada will be extremely cold for the rest of the month!
