Much of the United States has been enjoying unseasonably warm weather, and it has many people asking whatever happened to winter? NBC's Ann Thompson looks at the "why" behind the wacky winter weather. (TODAY)
A powerful storm front, packing high winds and at least two dozen tornadoes, ripped roofs off buildings and toppled power lines, leaving thousands of people in the dark. The Weather Channel's Julie Martin reports from Peotone, Ill.