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An early disruption event is starting for the Polar Vortex, with pressure anomalies setting the stage for something bigger later in Winter
A strong Polar Vortex usually means strong polar circulation. This usually locks the colder air into the Polar regions, creating milder conditions for most of the United States and Europe.
In contrast, a weak Polar Vortex can create a weak jet stream pattern. It has a more challenging time containing the cold air, which can now escape from the polar regions into the United States and/or Europe. Image by NOAA.
Same old broken record for FL with blazing above normal hot winters and super dry most of the year. I will never live long enough to see a cold winter again.
Interesting, official WGN outlook then I take it? I think the main caveat and wild card as usual will be the amount of snow cover that accumulates upstream in parts of the Plains states and southern Canada- in addition to the Upper Midwest. That impacts the intensity of the cold airmasses south of the Great Lakes region into the Ohio Valley.
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