Brutally cold” air is expected to settle in behind the storm that will affect a dozen states, from eastern Colorado to Maryland.

A mixture of freezing rain, sleet, and snow have been seen across the St. Louis region on Sunday. FOX 2 extreme weather specialist Chris Higgins explains the difference between freezing rain and sleet and the danger they bring to roadways.

It’s the type of winter weather we see more frequently and don’t really have a tough time identifying. Snowflakes are able to reach the ground – and not turn into freezing rain or sleet – when the temperature is at or below 32 degrees from the cloud base to the ground.