The incoming severe weather is an abrupt transition from winter conditions that have plagued much of the U.S. recently.

Before today, the last time we saw 40° was Jan. 22, and the last time we reached 50° was Jan. 13. It's only been three weeks of cold, but it seems like three years! Well, we are tracking a shift in ...

The planet has always changed. Ice ages came and went, oceans rose and fell, climates shifted over geological timescales. That's the story we've told ourselves for comfort, and it's technically true.