The NWS says that, during winter in the Northern Hemisphere, the polar vortex often expands, carrying cold air southward alongside the jet stream. Meteorologist Ben Noll wrote on X, formerly ...

A polar vortex collapse is set to bring freezing cold temperatures and travel chaos to large parts of the US and Canada in ...

Heavy snow is expected in a -5C Arctic blast later this month due to a rare polar vortex and weather maps show the areas of ...

South of the Arctic’s polar vortex is the jet stream, a river of west to east air that flows five to nine miles above ground, and helps keep the pole’s cold air confined to the Arctic.

Miles above the Earth, two bands of fast-moving air – the polar jet stream and the stratospheric polar vortex – sometimes tango together to influence weather in the northern hemisphere.

impact this polar jet stream. The timing is uncertain for North America but could see a change in the pattern for late March into early April." Pastelok added there was a small chance of a ...