Forecasters say the wind chill could plunge to 31 below in Chicago, 21 below in Boston and 7 below in New York on Thursday morning. It will be below zero as far south as Tennessee and in the teens in New Orleans and Jacksonville, Florida.
In all, The Weather Channel reported, 190 million Americans will be under wind chill watches or warnings Wednesday or Thursday.
The real temperatures won’t look much better: The forecast low for Louisville, Kentucky, on Thursday is zero, or 24 degrees colder than normal. For Atlanta, it’s 13 degrees. In Nashville, Tennessee, where the coldest air temperature recorded this fall and winter has been 18 degrees, the forecast low for Thursday morning is 5 degrees.
It’s easily the worst blast of cold since the infamous polar vortex a year ago. There’s more snow in the forecast, too, mostly around the Great Lakes. Parts of Michigan could get a foot through Friday, and a foot and a half could fall outside Syracuse, New York.