Bob Henson, weather and climate blogger at Weather Underground, discuss the arctic blast of cold air the United States has seen over the last couple of weeks and the "bomb" cyclone that meteorologists are calling winter storm Grayson.

Henson tells us what a "bomb" cyclone is, noting that "Grayson" is actually a "double bomb" because of the intensity and speed at which the pressure dropped.

We also talk the differences between climate and weather, referencing President Trump's tweet that insinuates that cold weather might be a reason to dismiss climate change is real.

Henson also compares winter storm Grayson to 1993's "Storm of the Century," breaking down the differences and similarities between the two.