Hi Frank,

I haven't carried out the exercise, but what occurs to me is the question of degree.

My understanding is that "rafales" tend to be more associated with persistent blustery weather.

"Coup de vent" is more of a gust(s) but not to the degree of being so stormy as above for "rafales"

So it's a question of context as to which term is most apt for the exercise.

Hope this helps.

Jim

Thanks, Jim.  After writing this question, it occurred to me that it could be a question of degree as you have pointed out.  These nuances are one of the challenges for us as students.  Best wishes.