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100 to 150 knots, and occasionally they may be as much as 200 to 250 knots. A well-developed
jet stream normally varies from 1,000 to 3,000 miles in length, 100 to 400 miles in width, and
from 3,000 to 7,000 feet from top to bottom.
Jet stream flow across the United States in the winter.
Figure 6
