This piece provides an educational counter to Trump’s recent nonsensical tweet mocking global warming where he said, ” In coming days, expected to get even colder. People can’t last outside even for minutes. What the hell is going on with Global Waming? Please come back fast, we need you!” I guess he doesn’t have a bookmark for “Inside Climate News.” It might seem counter intuitive, but global warming plays a role in blasts of bitter cold weather.
The reason, it influences the jet stream. Here’s how.

Source: Polar Vortex: How the Jet Stream and Climate Change Bring on Cold Snaps | InsideClimate News