An updated cold weather advisory was released by the NWS Fort Worth TX on Friday at 11:48 p.m. valid for Saturday between midnight and 11 a.m. The advisory is for Wise, Denton, Collin, Parker, Tarrant, Dallas, Hood, Johnson, Montague, Cooke, Grayson, Fannin, Lamar, Young, Jack, Hunt, Delta, Hopkins, Stephens, Palo Pinto, Rockwall, Kaufman, Van Zandt, Rains, Eastland, Erath, Somervell, Ellis and Comanche counties.

The NWS said dangerously cold wind chills as low as zero degrees are expected and could result in hypothermia or frostbite on exposed skin if precautions are not taken. If you must go outside, dress in layers, including a hat, face mask, and gloves.

This advisory is in effect until Saturday at 11 a.m.

Understanding cold weather alerts

Cold weather advisory: Be Aware. A cold weather advisory is issued when seasonably cold air temperatures or wind chill values, but not extremely cold values, are expected or occurring. Be sure you and your loved ones dress appropriately and cover exposed skin when venturing outdoors.

Extreme cold warning: Take Action! An extreme cold warning is issued when dangerously cold air temperatures or wind chill values are expected or occurring. If you are in an area with an extreme cold warning, avoid going outside. If you have to go outside, dress in layers, cover exposed skin, and make sure at least one other person knows your whereabouts. Update them when you arrive safely at your destination.

Extreme cold watch: Be Prepared. An extreme cold watch is issued when dangerously cold air temperatures or wind chill values are possible. As with a warning, adjust your plans to avoid being outside during the coldest parts of the day. Make sure your car has at least half a tank of gas, and update your winter survival kit.

Source: The National Weather Service