A good number of years ago a BA B747-200 evacuated in Lajes with what was believed to be a hold fire. It flew for over an hour before landing at Lajes (the only place it could go) in appalling weather, including (if memory serves) 50 gusting 60 knots of wind. There is astonishing video of the event taken by military personnel -the approach is something to behold (and was hand-flown as the turbulence caused the autopilots to drop out). The commander (who, I think, still does some training consultancy work) gives a superb presentation about the event. The slides deployed effectively and no-one was seriously hurt. It was not believed, at the time, that slides would be effective in such conditions.
There has also been academic work done in the Netherlands on slide use in high wind, though I don't have references to hand.