I get some conflicting answers on some of this and want to get it settled.
  • Winds Aloft charts give direction as True. I'm pretty sure this is right.
  • ATIS and Tower report winds as Magnetic. I'm fairly sure about this.
  • AWOS and ASOS report winds as True, I think but get conflicting answers on this from CFI's and others.
Its kind of important when you are trying to pick the most favorable runway, especially here in Portland, OR where magnetic variation is 16-18 degrees.

Jim