How to use Winds Aloft temperature

[Jhieminga]

To fly a track of 026 at 99KT TAS with a wind of 285/15, you will need to use a WCA of -9 for a heading of 017. It will give you a 101KT GS. As scifi mentioned, a pretty decent crosswind and certainly not much of a tailwind (all of 2 KT).