Chicago had its worst 'once in 100 year' winter last year and this year also broke more than a handful of records both in snowfall and temperature. From what I

Chicago had its worst 'once in 100 year' winter last year and this year also broke more than a handful of records both in snowfall and temperature. From what I can tell, the jetstream that usually blocks off Arctic air has weakened, thus raising the chances of cold air blowing on the midwest. We may be in a completely new winter pattern now. Or it may be a fluke, who knows, but its not safe to assume regular variability anymore. So far climate change has been blamed by some for the new higher frequency of this pattern. They may be right.