Will the increased snow cover at lower latitudes reduce warming? (I'm guessing probably yes, due to increased albedo. But, snow is also an insulator, and might be holding ground heat. I don't know which effect will be greater.)

If it does reduce warming, will the amount be significant relative to anthropogenic climate change? (I'm guessing probably not.)

And just out of curiosity, did the Southern Hemisphere experience similar polar disturbances last winter, or in the past few years?

Yuuup. A few years ago, when the entire United States was experiencing record lows, the Earth had an above average overall temperature. Imagine how hot everywhere other than the United States must have been, if the average was still higher despite our record lows.

It's just nature's hernia

B b but it was hot in the summertime or something