You will have to make sure you bundle up if you plan on heading out beginning Saturday night. On Friday night, the National Weather Service issued a cold weather advisory for several northern Wisconsin counties, including Door and Kewaunee counties, starting Saturday at 9 p.m. and ending at 9 p.m. on Monday. Very cold wind chills between 20 below to 30 below zero are expected as a part of a cold front coming through the state. Some parts of the state could expect wind chills to approach 35 below. The National Weather Service recommends you dress for the conditions, limit your pets' time outdoors, and ensure you use portable heat sources correctly.