Several days with temperatures of 10-20 degrees below the historical average could be dangerous to plants and ruin outdoor ...

As far south as Huntsville ... week's cold snap. The polar vortex is a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole (as its name suggests).

The company said the polar vortex is a part of Earth's atmosphere that is found over the North Pole. Strong winds typically ... including Europe, Canada, South America, and Asia,” the site ...

This unstable stream of air from the North Pole is currently extending ... and Europe. The polar vortex always exists around the North and South Poles, weakening in the summer and strengthening ...

Overnight low temperatures in the upper 50s are normal for February, not April, but we may see them this weekend in South ...