Could the Miami Valley Be Affected by a Strong Polar Vortex?

 

Temperatures in the Miami Valley are expected to dip into the teens this week, with overnight lows near zero. However, these chilly conditions may seem mild compared to what’s coming, as a surge of polar air is increasingly likely to descend into the region next week, driven by the polar vortex.

Understanding the Polar Vortex

John Franks, a meteorologist with the National Weather Service in Wilmington, explains that the polar vortex is a large area of cold, rotating air high in the atmosphere, typically about 20 miles above the surface. It generally remains confined to the polar regions by a strong polar jet stream, which prevents it from affecting weather at the surface.

However, when this jet stream weakens, it allows the frigid polar air to sink southward into the United States.

“The jet stream typically moves from west to east, but a strong polar vortex can disrupt this flow,” said Franks. “It can slow down the jet stream, and if the vortex is strong enough, it can even alter the jet stream’s direction at higher altitudes.”

How Polar Air Reaches the Surface

Disturbances in the polar vortex can lead to mixing between the stratosphere and troposphere, bringing the cold, upper-level air closer to the ground.

“Changes in the upper atmosphere caused by the polar vortex can push cold air down to the surface,” Franks noted. “While a strong polar vortex doesn’t always result in this, it often does.”

Preparing for the Cold

Although the potential for a significant cold air outbreak exists, there’s no need to panic. As long as proper precautions are taken—such as wearing appropriate clothing to stay warm—residents can safely manage the extreme cold.

By staying informed and prepared, the Miami Valley can weather the upcoming polar blast without major issues.