Maps Weird will try to Copy and Paste A large low is in the upper Midwest and is about to circumnavigate its self. This front extends from South America to Canada and the front borders or symbols are starting to wrap around to meet in a circle. Unusual for sure but not an indicator of Global Warming. If you want more information then study up on Air Masses aka Fronts. You're on your own.
The Suspicious Observers website has covered this for the last couple of days - and offers an explanation.