Hmmm.. What blade grips are you using? If you're using a 4 pitch and a 6 pitch, the main rotor speed would be pretty low in high winds, since you'd have the throttle below what you'd normally use for hovering, just to keep the Corona from going higher.. This will slow the tail rotors significantly, giving little to no left yaw authority since you are working against the normal rotation of the main blades.

I'm using two 4 pitch grips on my Corona and have also noticed this problem in high winds, but I can still make it yaw left, although at a much slower pace...