The National Weather Service Friday issued a wind chill advisory for Racine County that expires at 10 a.m. Saturday.

“Light westerly winds and clear skies will help reduce temperatures overnight,” the advisory reads. “Bitterly cold wind chills will thus continue tonight into Saturday morning.”

Ovennight wind chills are forecast between -15 to -25 degrees.

“A wind chill advisory means that very cold air and strong winds will combine to generate low wind chills,” the alert concludes. “This will result in frostbite and lead to hypothermia if precautions are not taken.”