Mawson 12Z 500hPa wind_speed 1954 - - - 35.8 - - - 26.6 27.2 20.4 27.0 14.3 1955 - 29.5 - - - - - 22.6 25.5 - - 18.2 1956 25.5 22.4 27.9 26.1 22.8 - 27.4 23.6 20.8 26.0 27.2 16.1 1957 24.8 35.5 23.2 - - - 27.5 27.0 22.0 25.1 25.2 15.0 1958 26.7 27.9 31.0 26.3 29.3 25.9 27.4 38.2 24.9 26.6 30.4 17.5 1959 26.2 32.6 - - - - - 25.0 - 25.9 25.8 14.7 1960 22.4 22.9 - - - - - - 21.4 13.7 11.6 15.8 1961 - - - 23.2 - - - 22.9 16.5 29.5 26.2 26.5 1962 19.1 22.1 35.6 - - 18.0 19.3 26.6 24.2 26.2 18.4 24.3 1963 22.3 37.6 30.5 28.1 - - - - 30.7 29.5 19.7 - 1964 - - - - - - - - - 14.4 - - 1965 - - - - - - - - 27.9 21.2 17.5 - 1966 15.5 23.5 32.1 44.3 - - - 26.5 24.7 27.3 25.5 - 1967 - - 25.2 17.4 25.1 20.0 16.0 35.2 21.0 30.4 21.8 13.3 1968 15.0 26.1 29.7 25.3 29.7 26.8 21.5 27.3 21.6 17.0 22.2 19.0 1969 18.1 20.5 22.6 29.9 28.4 30.8 28.4 29.5 26.9 20.3 21.8 19.8 1970 22.3 22.9 26.1 16.6 33.0 31.9 34.9 26.4 26.0 20.8 25.5 18.4 1971 16.3 20.4 36.2 22.3 17.5 21.2 19.9 34.7 26.9 24.5 19.9 21.6 1972 20.1 20.0 17.6 33.1 29.0 24.1 24.4 34.3 29.0 30.0 16.8 23.7 1973 15.3 20.7 28.1 27.8 28.1 20.5 28.4 24.6 23.8 26.7 20.7 15.8 1974 21.1 21.1 26.7 23.5 26.7 25.5 25.9 28.6 28.2 22.3 22.3 15.4 1975 17.3 18.5 29.7 22.3 15.0 21.3 28.2 19.9 22.2 28.8 19.2 12.4 1976 16.4 16.7 22.3 25.9 25.7 22.0 21.3 23.0 19.2 16.6 17.6 21.1 1977 15.9 16.8 27.5 21.8 24.5 22.1 27.7 21.2 26.1 29.7 19.4 15.3 1978 9.7 22.0 17.3 25.7 27.6 26.2 19.3 20.9 24.5 27.5 21.0 12.9 1979 18.1 20.4 32.2 23.3 24.8 17.7 23.2 21.7 22.6 25.4 29.2 19.8 1980 13.8 20.4 17.8 24.9 33.9 26.6 23.1 21.3 27.0 20.4 16.2 13.3 1981 15.3 19.6 15.8 28.1 23.4 24.9 27.3 18.7 18.4 24.0 19.0 22.1 1982 15.3 19.3 29.4 31.4 31.3 24.6 17.2 32.6 24.2 20.1 23.9 15.2 1983 14.9 14.9 21.9 25.4 17.6 17.4 19.4 25.2 24.3 23.8 16.7 15.9 1984 17.2 16.6 27.1 29.0 25.3 21.0 19.9 23.1 17.5 27.8 18.2 22.9 1985 17.4 19.5 20.4 19.9 21.9 21.5 30.8 19.2 20.2 17.2 19.7 15.4 1986 21.8 18.5 20.6 23.2 19.0 32.1 19.5 24.0 23.4 24.5 19.4 11.7 1987 16.2 16.0 - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - - - - - - - - - - - 1990 - - - - - - - - - - - - 1991 - - - - - 24.4 21.5 23.6 20.9 16.6 9.1 20.1 1992 11.9 13.6 25.7 39.4 20.0 34.4 21.1 19.0 27.8 26.3 22.7 17.3 1993 18.1 21.8 23.7 25.4 24.2 21.4 27.1 29.8 22.6 24.9 14.7 16.8 1994 15.9 18.9 18.1 25.3 25.5 22.6 20.6 21.1 14.8 18.9 13.6 14.1 1995 19.5 24.6 17.8 26.3 19.0 23.7 23.3 24.3 20.2 - - 9.6 1996 18.8 18.6 22.6 20.6 29.6 23.3 23.5 24.6 27.6 24.8 16.4 16.8 1997 13.9 20.5 17.3 24.6 26.4 22.7 32.3 28.3 20.2 18.7 19.6 22.0 1998 11.8 13.1 27.9 41.4 26.3 22.2 27.6 17.5 23.0 17.9 22.9 15.9 1999 17.6 18.9 22.7 25.7 30.1 25.9 23.3 24.5 24.6 15.4 17.4 17.5 2000 16.5 22.8 20.4 18.1 28.2 25.4 21.0 23.8 18.5 28.5 19.4 14.0 2001 12.5 19.4 19.5 30.8 20.0 28.4 22.1 24.1 14.7 21.8 14.4 14.2 2002 13.6 21.6 21.9 25.2 21.9 21.0 20.0 19.5 25.5 20.8 14.4 14.1 2003 14.5 14.6 17.8 32.1 28.4 22.4 26.5 31.1 20.4 13.7 22.2 17.0 2004 15.6 21.2 24.0 27.2 15.9 28.7 20.8 18.2 19.7 17.3 21.2 - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - 24.1 22.4 20.8 23.6 22.8 28.3 16.6 15.7 16.8 2009 21.5 22.4 18.6 23.4 18.8 30.3 22.9 23.7 24.2 20.1 17.4 19.3 2010 17.6 22.1 20.9 23.4 17.8 20.3 25.3 24.1 24.2 15.5 18.6 17.5 2011 19.3 23.9 24.0 31.5 27.1 27.4 19.1 19.6 22.3 22.0 21.4 18.1 2012 16.6 23.6 20.0 17.7 23.6 29.9 29.2 23.8 23.1 21.5 21.4 14.0 2013 18.9 20.4 24.3 23.1 22.0 21.8 22.2 23.9 22.5 16.7 21.5 17.5 2014 14.4 16.8 27.0 20.0 27.2 30.1 19.5 23.5 17.5 15.6 10.0 16.5 2015 18.7 18.2 22.3 26.0 34.1 20.2 27.0 20.8 28.3 17.6 23.0 15.9 2016 15.8 19.8 30.5 23.4 23.2 25.1 22.4 24.4 35.6 32.4 13.6 19.2 2017 15.2 21.5 27.5 29.7 22.8 23.8 27.0 26.7 20.1 20.2 21.1 16.9 2018 17.5 22.8 28.7 18.2 23.7 24.0 23.9 23.8 18.8 17.8 17.1 13.2 2019 20.4 26.1 23.0 26.4 17.2 26.9 16.1 21.4 22.8 28.4 18.3 17.4 2020 15.6 13.5 28.9 20.8 21.8 20.5 23.6 24.4 16.5 19.3 23.7 17.1 2021 17.3 17.6 29.5 18.6 19.7 21.5 17.5 17.9 21.8 18.9 25.9 19.6 2022 22.5 13.3 23.2 24.1 27.4 21.9 17.8 20.3 18.0 18.1 18.4 15.6 2023 15.7 18.4 34.3 18.5 27.4 21.7 25.9 27.1 19.7 17.7 15.9 16.3 2024 17.6 19.0 20.5 29.6 24.0 26.5 43.5 20.9 23.8 20.3 12.1 15.6 2025 17.0 14.3 22.9 23.5 20.3 20.5 21.2 26.1 24.9 22.9 14.8 11.5 2026 19.0 13.4 34.5 26.8 29.1 22.7 25.9 22.1 20.4 - - -