Cold Tonight

We are looking at an extremely cold night tonight because calm winds and clear skies are going to lead to a decoupling of the atmosphere. When the atmosphere de-couples, the surface winds go calm while the winds aloft are still moving at a fast pace. What that does, is it will actually seperate the surface from the rest of the atmosphere, allowing for the cold dense air to sink to the surface giving us very cold low temperatures. Now, the question remains, how long will the atmosphere de-couple. In this situation, just one extra hour of de-coupling can mean the difference of about 5 degrees. So we will see what happens tonight. Despite the complications of the forecast, teens for overnight lows are still a good bet.

KDLT Meteorologist Cody Matz