CHICAGO — National Weather Service officials issued a cold weather advisory in effect until 2 p.m. Tuesday for portions of central, east central and northeast Illinois as well as northwest Indiana. Officials said dangerously cold wind chills may reach as low as 28 below zero causing frostbite to those exposed to the frigid temperatures in as little as 30 minutes.

Dangerously low wind chills are prompting many schools — including Jacksonville District 117 — to cancel classes Tuesday or switch to remote learning.

Dangerous cold arrives Monday morning in Chicago. The brutally cold morning brings wind chills of -20 to -25 degrees. A cold weather advisory is in effect until noon. The core of the polar air will settle across the Chicago area Monday night into Tuesday morning.

The National Weather Service has issued a Cold Weather Advisory for most area counties. The NWS says the coldest conditions will be for the next several hours, with air temps below zero and wind chills unlikely to get above 20 below zero.