The pilot stated that he obtained the weather prior to entering the airport traffic pattern, which included winds from 280 degrees true at 10, gusting to 15 knots. He flew the traffic pattern to runway 27, with the airplane arriving about 30 feet above runway threshold and aligned with the runway centerline. About 15 feet above the runway, the pilot felt the airplane yaw to the left, which he corrected with right rudder. The airplane then began to sink quickly, so the pilot applied full throttle while maintaining wings level. After the engine achieved full power, the airplane landed "hard" near the left side of the runway, bounced, and headed about 40 degrees left of runway centerline. The airplane touched down once again, traveled onto a ramp and impacted two parked airplanes. The accident aircraft incurred substantial wing and fuselage damage. Postflight examination of the airplane revealed no preexisting mechanical anomalies that would have precluded normal operation.