A weakened polar vortex is expected to keep much of the Midwest and Northeast cooler than average this May, potentially making it one of the chilliest in recent years. The Weather Company and ...

The polar vortex has been absent from the United States for most of winter thus far, which lead to a very warm January. The Eastern Seaboard through the central and southern Plains recorded ...

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex will engulf much of North America as we head into next week, with temperatures dipping down into the -20s and ...