Prepare for a return of frigid weather in March—and April. Editor at Large You could be forgiven for not noticing that last month was the planet's third warmest February on record. That’s because ...

A rare early-season atmospheric disruption, a Sudden Stratospheric Warming, is predicted to impact the polar vortex, potentially bringing Arctic-level chills and early snow to many US states.

Prepare for a return of frigid weather in March—and April. Prepare for a return of frigid weather in March—and April.AFP—Getty Images Editor at Large You could be forgiven for not noticing that last ...