All of Wisconsin is under an Extreme Cold Warning Tuesday morning due to wind chills as cold as -35 degrees in some portions of the state.

The Extreme Cold Warning is in effect in southeastern Wisconsin, including the Milwaukee area, until noon. The National Weather Service warns that dangerously cold wind chills, as low as -30 degrees in the region, could cause frostbite on exposed skin in as little as 10 minutes.

“Dress in layers including a hat, face mask, and gloves if you must go outside,” the weather service says. “Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.”

Wind chills will gradually improve throughout the late morning and afternoon but will remain below zero through Wednesday morning. Cold Weather Advisories may be needed over portions of the area following the expiration of the Extreme Cold Warning, NWS says.

Schools and many colleges throughout the Milwaukee area are closed due to the extreme cold. Here’s what to know.

How cold is it in Milwaukee today?

According to the NWS forecast, Milwaukee is expected to see a low of around -10 degrees and a late afternoon high of 1 degree on Tuesday.

Wind chills in the city will be between -30 and -20 until 1 p.m. Then, wind chills are expected to be between -20 and -15 for the remainder of the day. Wind chills will reach around 10 degrees by Wednesday afternoon.

It is possible Milwaukee could set a cold temperature record today. According to NWS data, Milwaukee’s lowest Jan. 21 high temperature of -4 degrees occurred in 1883.

When will temperatures warm up in Milwaukee?

Southerly winds will start bringing warmer air Tuesday night into Wednesday, which is when we’ll see our “biggest changes in temperature,” Milwaukee-Sullivan NWS meteorologist Taylor Patterson said.

Air temperatures will climb to between 1 and 3 degrees overnight, with wind chills around -10 to around -16 degrees Wednesday morning.

Wednesday’s high temperatures will be around 22 degrees. By the time we hit Wednesday afternoon and evening, wind chills will be between 8 and 11 degrees.

Overnight Wednesday into Thursday, temps will be in the teens, with wind chills around 2 to 6 degrees. Thursday and Friday are expected to have high temps in the 20s.

Which Milwaukee-area schools and colleges are closed for the cold?

Many schools are closed on Tuesday due to the cold, including Milwaukee Public Schools, the University of Wisconsin-Milwaukee and Marquette University.

UW-Milwaukee is canceling all in-person classes, public events and student activities Tuesday, the school announced.

Its Student Union, however, will be open from 7 a.m. to 6 p.m. That includes the Food Center and Pantry, as well as UW Credit Union. Residence halls and their dining operations will remain open as well. For UWM off-campus events, people are to contact the event’s sponsoring unit for its status.

While all Marquette classes are canceled Tuesday, the university will be operational with limited on-campus services, the school announced. These areas will remain open — including the Alumni Memorial Union, University Dining Services and the Rec Plex — although hours may be reduced. In general, when classes are canceled for severe weather, most campus events and all student-organized events will be canceled, the university said.

Meanwhile, the University of Wisconsin-Madison is planning to “operate normally” on Tuesday, according to a weather update UW-Madison posted Monday afternoon to X and its Instagram Story.

An extensive list of school closures can be found here.

Extreme cold weather safety tips

The Milwaukee Health Department issued a “cold weather health warning” for Milwaukee County in coordination with the NWS and the Milwaukee County Office of Emergency Management.

The agencies recommend a series of actions to stay safe in the subzero weather, including:

• Limit time outdoors.
• Dress warmly.
• Monitor for health risks, including symptoms of hypothermia and frostbite.
• Prepare for emergencies by keeping extra supplies in your vehicle and home.
• Only use approved indoor heating devices to avoid fire and carbon-monoxide poisoning risk.
• Ensure pets are inside or in a “sheltered, warm space with access to water.”
• Check in on others.

Individuals in need of public space to stay warm during the day can visit 211’s list of locations in the Greater Milwaukee Area or dial 211. For overnight warming locations, dial 211.

Wisconsin weather warnings

Wisconsin weather radar

Journal Sentinel reporter Hannah Kirby contributed to this report.

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