A river of fast air circles the planet near the top of the troposphere, bending north and south as it goes. Its changing route helps determine whether a region receives a procession of storms, a surge ...

Our current jet stream configuration is so straight you could trace it with a ruler. I'm sure you've heard of the jet stream, the narrow bands of stronger winds that circulate high above the ground.

Something has been off about the sky lately, and meteorologists are finally putting numbers to the feeling. Across the past several months, forecast models have picked up on a significant ...

A recent study in the journal Nature shows that when the summer jet stream over Europe veers north or south of its usual path, it brings weather extremes that can exacerbate epidemics, ruin crop ...

The summer of 2025 brought unprecedented flash flooding across the U.S., with the central and eastern regions hit particularly hard. These storms claimed hundreds of lives across Texas, Kentucky and ...

Heavy precipitation, wind storms, heat waves—when severe weather events such as these occur they are frequently attributed to a wavy jet stream. The jet stream is a powerful air current in the upper ...

A new study challenges the idea that climate change is behind the erratic wintertime behavior of the polar jet stream, the massive current of Arctic air that regulates weather for much of the Northern ...

If you’ve ever heard a meteorologist mention the jet stream and thought, “Okay… but what does that actually mean?” You’re not alone. It’s one of the most important drivers of weather across the United ...