On Tuesday at 3:50 a.m. the National Weather Service issued a wind chill advisory valid from 8 p.m. until Wednesday 8 a.m. for Jefferson and St. Clair counties.

According to the weather service, “Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Slow down and use caution while traveling. Prepare for possible power outages.”

Advance Local Weather Alerts is a service provided by United Robots, which uses machine learning to compile the latest data from the National Weather Service.