Slayer,
The wind influences an arrow just as it will a bullet except that the arrow is longer and has feathers at the rear end so the wind has more to grab onto. A crosswind will push the arrow off course. A tailwind can be just as bad. I've shot arrows when there was a stiff wind at my back and I would have sworn that some of the arrows did complete barrel rolls going downrange. I was wondering what was wrong with my bow until I figured it out.
John