With another round of frigid temperatures blanketing the U.S. again, what’s behind the cold? While El Niño can be to blame for the back-to-back winter storms, something else is spurring the cold.

New Jersey is expected to miss the heaviest rainfall in the latest round of thunderstorms on Tuesday, but more flash flooding ...

More storms could fire up late Wednesday into Wednesday night. Chances are greatest along and south of the Nebraska-Kansas state line closer to the cold front. Some severe storms will be possible, ...