The pilot stated he encountered low level turbulence during the final approach. He landed on the 'ski strip' and a gust of wind raised the left wing during the landing roll. The airplane veered to the left and the right ski broke off. The airplane continued off the side of the runway and struck a snow berm and nosed over. The pilot estimated the winds to be from 130 degrees at 11 knots with gusts to 22 knots. The Fairbanks weather observation facility showed winds were from 160 degrees at 10 knots.