The National Weather Service released a cold weather advisory at 8:44 p.m. on Sunday in effect until Monday at 9 a.m. for Boulder/Jefferson counties below 6,000 feet/West Broomfield County, North Douglas County below 6,000 feet/Denver/West Adams and Arapahoe counties/East Broomfield County and Elbert/central and east Douglas counties above 6,000 feet.

The NWS adds to expect, “Very cold wind chills as low as 23 degrees below.”

“The dangerously cold wind chills could result in hypothermia or frostbite if precautions are not taken,” adds the NWS. “Unsheltered people will have a high risk of frostbite and hypothermia. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Livestock and pets will be vulnerable to the cold, so ensure adequate sheltering during this extended period of cold weather. Make sure outdoor animals have a warm and dry shelter, food, and unfrozen water.”

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