DULUTH, MN (KDAL) - The Twin Ports has seen a 40-degree swing in temperatures in the past 19 hours, and any sort of relief is likely a week away or more. A Northland wind chill advisory currently in effect will turn into a wind chill warning at midnight tonight through noon tomorrow, according to the national weather service’s Duluth office. It calls for wind chill values of 15 to 30 below through this evening, down to 35 to 50 below overnight and through Monday morning. The service warns frostbite could occur on exposed skin under these conditions in five to 10 minutes; if venturing outdoors, be sure to wear a hat and gloves. Temps are slated to remain very cold through the week, with highs by next weekend reaching single digits above zero.