Extreme Cold Warning Issued as Temperatures Could Drop Below Zero
The NWS extreme cold warning for Duluth said: "The dangerously cold wind chills as low as 40 below zero could cause frostbite on exposed skin in as little as 10 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes."