According to the pilot, he checked the winds prior to landing and calculated the maximum crosswind component to be 15 knots, including gusts. While on final approach, he was able to maintain alignment with the runway using the wing-low method. After touchdown, the airplane veered to the right and departed the runway surface. The airplane then nosed over in the grass, which was saturated with water. Aircraft damage included structural damage to both wings, the vertical stabilizer, and the rudder. The pilot also reported that he may have relaxed his diligence on keeping the airplane's ailerons into the wind during the landing roll. He reported no mechanical malfunctions or failures prior to the accident.