According to the pilot of the Robinson R44 II, he was on the final leg of a visual flight rules (VFR) flight. About 18 miles from the destination airport, the pilot obtained a special VFR clearance from the approach controller due to snow showers in the area. The clearance was later canceled by the controller due to "saturation," and the pilot was told not to enter the area, which was several miles ahead. The pilot then turned the helicopter around and entered a "near zero/zero whiteout," but during the "tight" turn the attitude indicator "tumbled." The pilot then elected to perform a precautionary landing to a plowed field below. As the helicopter contacted the ground, the skids sunk into the soft terrain, and the aft portion of the tailboom and the skids separated from the fuselage. The weather reported at the destination airport at the time of the accident included 1 1/2 statute miles visibility in light snow and mist.