Jet streams are air currents formed by the collision of warm tropical air and cold polar air in the atmosphere, plus the rotation of the planet. When meteorologists in North America mention “the ...

A cooler day is expected as clouds continue to hang over the region. A polar jet stream from the north has dropped into the continental United States, bringing cooler air and chances for snow showers ...

“Typically going from west to east, and formed at the boundary between significantly different air temperatures, like between cold polar air and warmer tropical air.” “The jet stream is ...

One of the most devastating (and hardest to mitigate) effects of climate change for the Northern Hemisphere is the slowing of the polar jet stream - so, how do we keep track of this change? The polar ...

"When a cold front or polar air mass moves into a region like Florida, this excess moisture can translate into heavier precipitation, including snow when conditions are cold enough," the release said.

“The jet stream is a fast flowing, narrow current of air high up in the Earth's atmosphere,” said Knox. “Typically going from west to east, and formed at the boundary between significantly different ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

The jet stream typically acts as a barrier to keep the polar vortex contained near the Arctic, but at times, some of the vortex can break off or move south, bringing unusually cold weather into ...

In Earth’s upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 442 kph, but they ...