NASA's AIRS captures polar vortex moving in over US

Feb 01, 2019, at 06:59 pm

Washington, Feb 1 (IBNS): The U.S. Midwest has been gripped by the lowest temperatures it has seen in years. An unusually cold Arctic air mass, called a polar vortex, is responsible for the severe temperatures, which in many areas have plunged well below 0 degrees Fahrenheit (-18 degrees Celsius).