Several schools in the Chicago area will be closed or have delayed start times on Monday as dangerously cold temperatures have already manifested.
By Sunday night, dozens of schools reported late openings or full closures due to intense weather conditions.
A Winter Weather Advisory issued for DeKalb and LaSalle counties from 6 p.m. Sunday and for Kane, DuPage, Cook, Grundy, Kendall, and Will counties in Illinois; Lake, Porter, and LaPorte counties in Indiana starting at 9 p.m. Sunday, all in effect until 6 p.m. Monday.
In addition, beginning at 9 p.m. Sunday, a Winter Storm Warning will go into effect in Lake and McHenry counties in Illinois, as well as Kenosha County in Wisconsin.
Heavy snow will begin to fall late Sunday in those areas, with up to 9 inches possible in some areas.
The cold wind chills could cause frostbite on exposed skin in as little as 10 minutes, the National Weather Service said.
Here's a look at some of the schools announcing closures as part of the winter weather:
WASHINGTON SCHOOL HARVARD: CLOSED
ALAN B. SHEPARD HIGH SCHOOL PALOS HEIGHTS: OPENING LATE (9 a.m.)
ALDEN-HEBRON DIST #19 -HEBRON ILLINOIS HEBRON: CLOSED
ALGONQUIN ROAD SCHOOL FOX RIVER GROVE: CLOSED
ALLENDALE SCHOOL - LINC WOODSTOCK: CLOSED
BRIARGATE SCHOOL CARY: CLOSED
BUSH SCHOOL JOHNSBURG: CLOSED
CAMBRIDGE LAKES LEARNING CENTER PINGREE GROVE: CLOSED
CANTERBURY ELEMENTARY SCHOOL CRYSTAL LAKE: CLOSED
CARMEL HIGH SCHOOL-MUNDELEIN MUNDELEIN: CLOSED
CARY JR. HIGH CARY: CLOSED
CHESAK SCHOOL LAKE IN THE HILLS: CLOSED
CHILDREN'S HOUSE MONTESSORI SCHOOL DUNDEE: CLOSED
CHRISTIAN LIFE PRESCHOOL KENOSHA: CLOSED
CORNERSTONE CHRISTIAN ACADEMY SYCAMORE: CLOSED
COVENTRY ELEMENTARY SCHOOL CRYSTAL LAKE: CLOSED
CREEKSIDE MIDDLE SCHOOL WOODSTOCK: CLOSED
DEAN ELEMENTARY SCHOOL WOODSTOCK: CLOSED