Polar vortex - Wikipedia The stratospheric polar vortex is an area of high-speed, cyclonically rotating winds around 15 km to 50 km high, poleward of 50°, and is strongest in winter It forms during autumn when Arctic or Antarctic temperatures cool rapidly as the polar night begins
What is the Polar Vortex? - National Weather Service The polar vortex is a large area of low pressure and cold air surrounding both of the Earth’s poles It ALWAYS exists near the poles, but weakens in summer and strengthens in winter The term "vortex" refers to the counter-clockwise flow of air that helps keep the colder air near the Poles
Polar Vortex: Everything You Need to Know About Falling Temperatures What Is the Polar Vortex? The polar vortex is a circular shape of low pressure and strong winds that forms high above the Earth's surface It develops in the stratosphere, a layer of the atmosphere that sits above the troposphere where everyday weather occurs
Understanding the Arctic polar vortex - NOAA Climate. gov When the vortex weakens, shifts, or splits (right globe), the polar jet stream often becomes extremely wavy, allowing warm air to flood into the Arctic and polar air to sink down into the mid-latitudes
The Polar Jet Stream and Polar Vortex - MIT Climate Portal The polar jet stream and polar vortex are two rings of fast-moving air around the Arctic, which, as the climate warms, may change in ways that cause some places to see more extreme cold spells during winter