The Polar Vortex in the upper atmosphere has disintegrated after the intense warming of the stratosphere in mid-March.

March's polar vortex collapse is now funneling a wintry encore all the way south to the Gulf Coast states. Georgia, Mississippi, and Alabama are still recovering from a devastating weekend storm ...

Another massive storm is set to bring life-threatening tornadoes and potentially historic flooding to several states ...

The pattern responsible for severe weather and flash flooding in the central United States will ease in the week ahead - but at a price. Winterlike conditions will return to a large part of the ...

"We're looking at a series of cold fronts and storms sweeping from the Mississippi Valley to the ... been warning for weeks that a weakening polar vortex in late March would usher in a stretch ...

According to AccuWeather, a weakening polar vortex will push colder air into ... while another traveled 65 miles from Louisiana to Mississippi, killing five people. Long-track tornadoes were ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation ...

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