A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

A bullet train of warmth will arrive in the days after Dec. 25, in the form of a strong Pacific jet stream ... 30 degrees above average in parts of North America, with the most unusual warmth ...

A storm will bring heavy snow, particularly to southern Nebraska and southwest Iowa, with sharp variations in snowfall totals ...

New Year's Day temps will remain above freezing, so road conditions won’t deteriorate much until the overnight period.

They noted that one of the most El Niño events since 1950 - a climate pattern that causes the Pacific jet stream to shift south ... This year is forecast to be Earth’s warmest on record ...

The polar vortex is a low-pressure system of cold air that swirls above Earth’s poles. There’s one over the South Pole in ...

The daily weather we experience is largely shaped by atmospheric conditions nearly 30,000 feet above us, where a key factor ...

The FOX Forecast Center ... with cold air masses from the north. Since the boundary between cold and warm air masses is more pronounced during winter, the jet stream is more robust.

The cons outweigh the pros for an abnormally strong jet stream heading to the Pacific ... 12,000 kilometres from the Philippines to North America. SEE ALSO: Blast of snow will bring a swath ...

For the next week or two, the jet stream crossing the North Pacific will be abnormally straight and strong. The strongest swath will surpass 200 km/h, and stretch nearly 12,000 kilometres from the ...

NEW MEXICO (KRQE) – Calmer winds and colder air, with the slight southern nudge in the jet stream, has gripped the region on ...