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Article: JET STREAM GETS CARVED LIKE A TURKEY
- Article from:
- Roanoke Times & World News
- Article date:
- November 25, 2005
- Author:
CopyrightCopyright 2005 Roanoke Times & World News. Provided by ProQuest LLC. (Hide copyright information)
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Many of you carved a turkey on Thanksgiving. Meanwhile,
atmospheric features aloft have carved a trough.
The development of a trough in the jet stream over the eastern
United States is the reason that chilly weather has shown up right on
time for the beginning of the holiday season.
A trough amounts to a southward dip in the jet stream, a fast-
moving river of air four to eight miles high that steers weather
systems. The principal jet stream in our hemisphere spends most of
the summer over Canada but begins moving southward in fits and
starts through the fall until it can dip as far south as over the
Gulf of Mexico at times in the winter.
For most of the fall, we have been under a ridge ...