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Axios
Stuck jet stream bring blowtorch December to Lower 48, frigid Alaska
The Lower 48 states have seen record-shattering warmth so far this December, with temperatures running as high as 35°F above average for this time of year. The warmth has been so pronounced that during the weekend, brush fires broke out in a snowless, unusually mild Denver metro area. The big picture: The jet stream, which is a river of air that rides at about 30,000 feet along the temperature contrast between air masses, steering storms as it goes, has been stuck in a position well north of the
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