When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation ...

An idealized illustration of giant meanders in the global jet stream known as wave-4 patterns, which are bringing extreme winter cold and/or precipitation (blue areas) to parts of North America and ...

TULSA, Okla. — While we live well below the jet stream, it affects our everyday weather. This current of winds between 4 and 8 miles above the surface, guides storm systems around the globe. On ...

What Exactly Is The Jet Stream The jet stream, or any wind, is the result of differences in surface temperature. In simple terms, warm air rises, creating low pressure, and cold air sinks, creating ...

When the bubonic plague reached England in the summer of 1348—spread by fleas, lice, or infected humans, according to the latest theories—it reached a breeding ground for disease. Londoners’ immune ...