Jet stream pushes planes to speeds near 840 mph, shortening flight

Jet streams are the strongest during the winter when air north of the stream is colder and air to the south is warmer. Since the air is cold in Canada and warm over Florida, the "contrast between cold and warm causes the winds to blow faster," he explained.
Jet streams are the strongest during the winter when air north of the stream is colder and air to the south is warmer. Since the air is cold in Canada and warm over Florida, the “contrast between cold and warm causes the winds to blow faster,” he explained.

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