Did the Jet Stream ever touch down at sea level?

Answer 1

There's a sci-fi novel in which the jet stream makes a series of dips from near outer space to the surface of the earth, causing a"random" scattering of deeply and instantly frozen local environments. They are so cold and become so frequent that a new ice age sweeps over the earth in a few weeks, causing somewhat predictable disasters. I do not remember the title nor the author's name, but the fictional scenario seemed possible if very remote. I don't know what research, if any, the author conducted.

-Mark Phipps, 2012

Answer 2

No, the jet stream is a high-altitude, fast-moving air current that typically flows at an altitude of 6 to 9 miles above sea level in the upper troposphere. It does not touch down at sea level or at the Earth's surface.