The polar vortex, a mass of cold air over the Arctic, is beginning its seasonal strengthening. A strong polar vortex typically keeps the coldest air locked near the North Pole. A weaker or wobbling ...

The polar vortex is beginning to stir, signaling a gradual shift toward cooler, autumnal weather in the northern U.S. While temperatures are expected to cool, the Climate Prediction Center forecasts ...

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The U.S. is set to feel the impacts of an Arctic polar vortex next week, meteorologists have warned, with sub-zero temperatures possible across much of the country. Meteorologists explained that polar ...

Most of the holidays may be over, but winter is sticking around — and it's bringing freezing weather to Texas next week. A polar vortex, a weather pattern similar to the historic winter storm that ...

Watch the moment a huge blaze in Utah turned into a gigantic fire vortex on Saturday (12 July). Footage captured by a firefighter shows the unusual weather phenomenon which the US Forest Service ...

Summer may end on a cooler note for parts of the U.S., with meteorologists suggesting that a weakened polar vortex could usher in below-average temperatures as September begins. In contrast to earlier ...

A rare fire tornado formed over the Deer Creek Fire near La Sal, Utah, on July 12, amid rapidly intensifying wildfire conditions. The vortex launched flames into the air and damaged a fire engine, ...