But this setup isn't over North Carolina
Isn't that area known for high winds (one reason Kittyhawk was so popular for early aviation gliders?)
It just seems excessive, is all.
Just used that as an example. Remember, we're not talking about surface winds. Kitty Hawk is popular because the dune is right on the beach, and benefits from the surface winds created by the ocean.
But, for comparison here's Dallas, TX:
FT 3000 6000 9000 12000 18000 24000 30000 34000 39000
DAL 2514 3217+11 3427+04 3225+00 3235-14 3328-26 334642 334752 345662
You're still looking at 30+ mph winds at 9000 feet, nearly 40 mph winds at 18000 feet, etc.
You can find the forecast upper level winds for the entire US at
http://aviationweather.gov/products/nws/winds/ if you want to check other cities or regions...