US weather to go nuts with blizzard, polar vortex, heat dome, atmospheric river all at once

The United States is being hit by a series of extreme weather events, from torrential rains to record heat and late-season snow. Washington, D.C. hit a record high of 86 degrees on Wednesday, then snow fell on Thursday. Meteorologists say the Southwest is facing a heat dome with prolonged triple-digit temperatures. Polar cold will extend to the Midwest and East. Two northern storms are likely to dump feet of snow, with one developing into a rare bomb cyclone inland. Hawaii is dealing with an atmospheric river and flash floods. Experts associate the wild fluctuations with a sharply declining jet stream.