Comments:World-record wind speed confirmed
There wasn't a human being on the island when the machine instruments recorded it. Where as on Mount Washington there was a machine there to record along with a person to confirm that the instruments were right. Mount Washington still holds the record.
However, the Mount Washington Executive Director Scot Henley believes it's appropriate for an international organization (World Meteorological Organization)to investigate international weather events, and while everyone associated with the Mount Washington observatory wishes the record could remain with them, Henley says "there is no indication that points to it [the new record] being inaccurate." So it seems that Barrow Island, Australia does hold the new world record.