ct690911: On one course, a 15 mph cross wind seems to have little impact, while on another, it really makes the ball sail off line.
All depends on the course, if a fairway is lined by trees on both sides then the wind will have a lot less effect than on one with no trees.
It amazes me how often some people get the wind wrong just because they haven't figured that out!
Not saying that's what's happening to you Colin, just getting it out there.