Forecasters say one of the key factors driving the weather is an atmospheric river, which is a long band of water vapor that can transport moisture from the tropics to more northern areas.

Many states across the central and eastern United States face wild weather this week, including an atmospheric river and temperature swings. See how in seven maps.

The U.S. East Coast is due for a whiplash-inducing stretch of weather that will be rainy, windy and potentially dangerous, due in part to an atmospheric river and developing bomb cyclone. The storm is expected to bring heavy rain and fierce winds to many areas from Tuesday night to Wednesday night,