"see pockets of high heat and pockets of deep freezes" does not at all contradict a statement that overall global temperature is rising. In fact, one would expect that an overall rise in temperature would lead to local pockets of colder temperatures.
That isn't what I said, though. I was making a broader statement. I'm really surprised HNers don't spend more time familiarizing themselves with climate change fundamentals. It's the defining challenge of current and all future generations, might be worth looking into beyond a third-grade "things get hotter" level. But whatever.
the rise in temperature makes a more turbulent atmosphere, this disrupts familiar atmospheric distribution of thermal energy, we already have unusual atmospheric stalls and vortexes, along with changes in oceanic circulation.