Wind turbines that are not built for cold weather operations will have problems with lubricants for joints and bearings and icing on the blades. The icing does

Wind turbines that are not built for cold weather operations will have problems with lubricants for joints and bearings and icing on the blades. The icing does the same thing to turbine blades as it does to plane wings (i.e. makes them suck in terms of aerodynamics and kills lift) and as the blades slow the friction and load from the lubricant failure means that eventually the turbine will stop spinning and then just freeze up.