About:1985 North American cold wave

The 1985 North America cold wave was a meteorological event which occurred in January, 1985, as a result of the shifting of the polar vortex farther south than is normally seen. Blocked from its normal movement, polar air from the north pushed into nearly every section of the central and eastern half of the United States and Canada, shattering record low temperature records in a number of areas. This was preceded by unusually warm weather in the eastern U.S. in December, 1984, suggesting that there was a build-up of cold air that was suddenly released from the Arctic, a meteorological event known as a mobile polar high.