And as I don't have time to get my iPhone out on approach, for anyone who doesn't know (and/or who wants an easy way to do it whilst hand flying and trying not to take up too many grey cells!):
1/2 the reported wind if its 30 degrees off = the crosswind (1/2,3)
2/3 the reported wind if its 40 degrees off = the crosswind (2/3,4)
3/4 the reported wind if its 50 degrees off = the crosswind (3/4,5)
...and any more than that its pretty much all crosswind (apparently).
I was shown this years ago in a Cessna 152 and have used it in everything from a Cirrus to a heavy jet and it is surprisingly accurate.
Gust factor = respect the maximum wind speed, I reckon, even if it's a gust !