The coldest blast of arctic air this winter sent wind-chill readings to 50 below zero in Minnesota — and the pain is headed south and east for Thursday, where kids in some of the U.S.'s biggest cities are getting a day off from school.
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.