IRON MOUNTAIN — All schools in Dickinson and Iron counties — as well as North Central in Menominee County and the Wisconsin school districts of Niagara, Florence, Beecher-Dunbar-Pembine and Goodman-Armstrong Creek — will be closed Friday, most due to the extreme cold.

A couple of local schools districts already had no classes because of previously planned in-service days for staff.

Bay College campuses in Iron Mountain and Escanaba also will be closed Friday.

Temperatures were expected to be at least minus 18 degrees Fahrenheit below zero during night and remain below zero today through Saturday morning, accompanied by deadly wind chills, forecasters warned.

The National Weather Service has issued an extreme cold warning in effect from 6 p.m. Central time today until 9 a.m. Saturday for the central Upper Peninsula.