Halley 12Z 500hPa wind_speed 1957 - - - 19.8 23.2 20.4 27.9 21.8 26.9 19.2 18.7 16.1 1958 15.9 20.9 27.7 22.4 17.9 37.4 24.5 23.2 27.3 23.0 15.3 14.6 1959 18.8 8.0 22.9 23.0 24.0 28.3 27.4 26.4 17.3 24.4 13.9 16.5 1960 17.3 25.2 - - - - - 26.8 31.6 18.5 16.7 15.8 1961 20.2 14.6 21.4 26.0 27.9 20.2 26.5 29.7 21.6 23.3 17.5 18.4 1962 21.6 13.6 15.8 26.8 32.9 23.6 27.6 28.7 25.6 29.1 22.6 16.7 1963 15.9 14.8 15.6 22.6 21.2 31.9 25.1 27.5 25.0 21.3 17.3 17.2 1964 19.2 18.9 21.3 31.8 27.3 26.4 36.0 21.1 21.6 17.2 16.1 19.8 1965 21.5 23.4 23.0 25.3 26.6 25.7 29.2 21.8 20.4 22.7 18.1 15.4 1966 18.5 20.2 23.8 36.6 23.5 25.2 28.7 26.4 24.9 15.4 18.3 15.2 1967 15.6 20.0 19.9 20.0 23.6 23.7 25.8 26.6 26.5 15.6 15.5 21.5 1968 20.5 16.5 18.7 25.6 14.5 21.8 25.5 27.0 24.9 20.0 16.4 16.9 1969 15.6 15.8 22.7 25.9 22.2 22.5 30.5 31.9 31.4 22.5 18.0 14.2 1970 11.4 16.1 31.3 27.7 24.8 19.7 30.3 31.1 22.5 23.0 22.1 16.4 1971 - - 22.5 23.9 23.4 29.4 24.5 25.9 30.8 26.0 21.1 16.2 1972 12.2 16.7 21.2 23.0 25.7 18.1 31.9 28.4 21.4 29.9 17.8 16.5 1973 18.3 20.4 22.5 19.5 23.1 23.3 34.8 28.2 22.4 20.9 22.3 24.5 1974 16.0 18.1 26.7 27.5 21.2 37.4 19.7 26.8 19.3 33.7 21.4 16.2 1975 18.7 25.8 15.2 19.8 23.5 26.4 26.8 - - - - 17.0 1976 11.4 22.0 22.5 - - - - - - - 24.4 14.1 1977 18.0 15.8 28.5 24.1 24.1 - - 18.5 20.6 26.1 17.4 15.0 1978 24.6 17.7 23.5 24.7 33.0 26.5 27.7 30.3 28.5 21.5 15.4 18.6 1979 17.8 21.8 29.9 20.6 - - 28.9 24.0 21.8 19.1 14.9 19.8 1980 14.5 22.1 13.5 20.5 30.4 20.0 19.3 19.5 17.2 26.2 18.1 11.1 1981 - - 23.3 26.5 23.4 27.5 23.3 - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - 17.7 15.4 17.0 20.2 24.8 24.5 21.3 30.9 23.2 18.2 14.7 1985 23.0 20.3 20.9 20.3 17.2 26.6 24.9 26.9 29.8 38.5 23.9 16.6 1986 14.4 15.6 22.9 27.0 21.4 27.6 30.9 30.3 25.7 27.1 25.2 15.6 1987 19.7 - 18.7 - - 19.1 24.3 19.4 - - - - 1988 - - 18.5 28.4 24.1 24.3 24.2 26.5 22.6 22.7 13.3 13.6 1989 17.4 23.0 19.0 17.0 27.0 18.9 29.2 36.2 - - 17.0 16.5 1990 - - - - - - 18.5 - - - - 20.4 1991 19.3 23.8 15.8 25.4 31.6 28.8 20.7 - - - 18.2 17.7 1992 - 17.1 27.1 27.1 20.0 23.6 24.1 24.3 24.6 23.3 21.4 20.1 1993 19.3 21.0 19.7 24.1 28.4 20.3 24.6 31.0 22.5 20.3 18.1 10.2 1994 15.6 14.8 22.5 17.0 33.7 26.0 21.7 20.2 25.8 14.0 18.6 21.6 1995 20.6 22.4 19.5 25.0 28.6 20.9 19.9 22.9 24.4 22.3 17.2 12.9 1996 13.7 31.2 24.6 33.5 24.6 21.3 27.0 25.5 21.7 19.1 24.8 20.0 1997 17.7 19.2 22.2 20.7 18.5 30.7 18.4 20.5 21.5 20.2 15.0 17.3 1998 19.7 19.4 28.0 24.7 26.5 25.6 30.3 21.0 27.1 24.2 20.3 14.2 1999 28.2 17.3 19.5 18.0 22.6 17.5 22.2 29.2 24.5 21.4 15.8 16.4 2000 13.6 22.1 41.5 22.8 18.3 17.7 33.7 14.7 25.6 25.2 21.9 14.3 2001 17.1 21.5 20.9 17.8 31.1 22.3 20.7 24.5 30.0 22.1 20.2 16.9 2002 21.3 23.7 21.8 20.4 24.5 17.3 38.2 37.5 40.5 31.8 20.7 22.4 2003 26.0 19.2 25.3 30.8 25.3 28.8 26.1 25.0 30.9 18.6 16.6 18.4 2004 13.5 11.6 25.7 30.4 29.2 33.4 26.8 25.9 22.1 20.7 22.2 18.3 2005 17.6 16.5 18.9 27.0 27.2 23.9 29.9 23.3 32.1 30.3 22.6 17.1 2006 22.0 21.4 22.7 27.2 27.9 36.5 23.3 17.5 19.6 29.1 24.8 17.1 2007 18.3 16.7 17.1 24.7 19.2 20.5 30.4 20.8 26.3 29.2 19.6 18.3 2008 14.3 21.1 23.1 29.8 19.8 28.0 27.4 33.8 30.6 28.5 20.8 13.7 2009 14.3 17.3 25.4 29.5 25.2 22.2 28.5 31.4 29.0 15.4 22.5 10.7 2010 17.2 18.8 33.2 26.8 26.0 28.3 29.1 29.0 26.4 23.6 22.4 18.3 2011 13.4 16.1 31.5 22.7 26.0 28.9 28.4 29.0 35.8 18.3 18.4 15.5 2012 16.9 20.8 29.0 31.4 30.2 24.3 33.1 28.6 25.0 24.1 16.5 15.8 2013 13.2 17.6 26.1 29.4 27.7 36.4 20.7 23.2 26.9 23.9 20.1 14.2 2014 18.5 17.8 19.4 29.5 27.3 28.9 28.5 - - 18.4 17.6 16.8 2015 15.4 22.2 19.7 27.5 31.9 27.3 29.2 26.8 24.6 20.4 17.1 16.9 2016 16.9 15.1 20.6 23.9 23.6 24.9 25.6 23.7 22.6 25.8 13.8 19.6 2017 14.1 21.6 - - - - - - - - - 17.4 2018 13.0 18.2 - - - - - - - - - 19.2 2019 20.1 14.1 - - - - - - - - - 13.8 2020 14.0 - - - - - - - - - - - 2021 - - - - - - - - - - - 18.1 2022 22.6 - - - - - - - - - - 14.8 2023 16.1 - - - - - - - - - - 11.6 2024 18.5 - - - - - - - - - - -