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 ...

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The polar vortex is beginning its seasonal strengthening, signaling a gradual shift toward cooler weather. Frost advisories were issued in parts of the Great Lakes region, New York, and New England as ...

The polar vortex is beginning to stir, signaling a gradual shift toward cooler fall weather in the northern U.S. Tennessee is expected to see mild temperatures through December, with the average first ...

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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Indiana can expect dry temperatures around the state at the beginning of October. Although fall kicked off earlier this week, it'll be a little while before we are affected by a polar vortex. Hoosiers ...