The National Weather Service issued a cold-weather advisory for Chicago and other parts of the state this weekend, warning of “dangerously cold wind chills” that could dip as low as 20 to 25 degrees below zero.

The National Weather Service issued two advisories from 6 p.m. Sunday to noon Monday, and from 9 p.m. Monday to noon Tuesday.

As Chicago braces for dangerously cold temperatures, you may notice some changes in the weather advisories issued by the National Weather Service.

Monday, the temperature is expected to drop to minus 3 at O’Hare International Airport. A low of minus 7 is expected at O’Hare Tuesday.

Meteorologists warn to dress properly to avoid frostbite as bone-chilling temperatures move into the Chicago area this week.

The drop in temperatures in Chicago has raised concerns about river ice formation, which could lead to ice jams in major waterways.

Chicago faces cloudy skies and potential snow with risks of slick travel conditions and a plunge in temperatures by the weekend.

In Chicago, snow seasons are tracked from July through the following June. The area normally can expect 38.4 inches, according to the National Weather Service. Chicago was warmer than average during the 2023-24 season due to a La Niña climate system,

The freezing winds are expected to remain in the Chicago area until Wednesday. Monday and Tuesday morning should be the coldest periods of the stretch, according to the National Weather Service.

Chicagoans can expect cold temperatures this week in the single digits with little snowfall, according to the National Weather Service. After Sunday’s snow, there may be a little more snowfall Wednesday night,

A piece of the polar vortex is spilling into the Midwest, creating extreme cold for the Chicago area and northwest Indiana for the next few days.