Mount Washington once held the world record and still holds the Northern Hemisphere and Western Hemisphere record for directly measured surface wind speed, at , recorded on the afternoon of April 12, 1934. A new wind speed record was discovered in 2009: on April 10, 1996, Tropical Cyclone Olivia had created a wind gust of at Barrow Island off the coast of western Australia. (Satellite and radar measurements, e.g. of tornadoes, hurricanes, and air currents in the upper atmosphere, do not officially compete with records for surface measurements.)