Marsh 12Z station_level_pressure 1970 992.8 985.4 993.0 981.6 989.0 994.8 992.4 992.9 989.0 990.8 988.8 989.7 1971 987.8 989.6 985.9 988.7 1001.3 992.8 998.8 983.2 989.3 990.2 984.0 992.5 1972 993.5 990.0 990.1 986.8 992.9 992.9 989.3 1000.2 987.9 993.6 985.8 991.4 1973 991.2 985.1 983.7 979.2 986.9 996.0 1001.2 985.8 987.1 990.8 988.1 983.9 1974 - - - - - - - - - - - - 1975 992.4 986.1 984.6 989.7 990.9 997.3 995.9 988.9 991.5 983.7 985.3 983.9 1976 993.3 989.4 993.0 986.5 984.3 993.4 981.1 980.6 986.8 991.5 995.9 999.8 1977 994.2 988.2 989.9 989.6 983.8 992.7 1000.7 992.5 982.3 987.9 987.5 995.4 1978 989.0 991.4 993.6 993.3 1002.1 984.1 1002.0 984.4 993.9 984.8 994.0 987.6 1979 995.3 989.1 994.8 985.0 997.4 989.6 989.2 988.9 992.0 986.5 993.7 996.9 1980 991.0 993.6 991.6 994.5 996.4 985.4 1000.1 996.0 993.7 990.3 986.4 993.8 1981 991.7 983.7 999.8 998.2 993.2 996.5 996.1 989.4 991.2 990.6 982.9 987.6 1982 992.2 987.4 983.6 985.6 992.4 1002.3 989.7 997.2 991.8 985.9 991.1 994.6 1983 994.8 987.8 989.7 999.2 999.3 993.9 989.4 990.5 993.6 986.0 982.6 986.4 1984 988.6 988.8 996.8 986.0 993.4 999.0 1000.5 991.2 998.1 990.7 984.5 1000.6 1985 995.2 985.3 989.0 988.6 994.9 1006.5 986.8 985.3 985.4 994.2 988.3 982.0 1986 985.3 988.9 990.2 989.5 997.9 982.2 984.8 983.8 987.0 992.8 982.9 984.2 1987 988.0 991.9 983.6 987.7 995.3 991.7 992.9 999.7 987.6 989.0 982.8 987.1 1988 992.5 990.3 986.5 991.8 996.9 994.0 990.6 999.1 991.3 999.7 982.1 982.8 1989 991.0 986.7 987.4 991.1 985.2 982.9 995.0 997.9 990.4 983.5 983.1 990.7 1990 989.9 991.5 984.2 990.1 1001.8 983.7 992.8 980.3 992.5 976.3 972.3 987.0 1991 987.4 990.6 988.5 991.5 987.1 990.3 992.0 986.6 996.5 984.5 987.6 997.2 1992 990.1 986.1 989.3 993.6 997.6 1000.7 996.3 990.0 987.4 985.1 993.3 994.5 1993 994.3 992.1 984.3 983.6 985.0 986.8 988.8 983.6 978.4 978.7 979.1 978.6 1994 978.0 980.7 988.4 990.3 991.2 991.6 989.5 984.6 976.2 984.6 988.9 983.6 1995 987.7 987.5 978.4 987.5 986.9 984.0 984.3 989.3 983.6 988.8 977.5 981.4 1996 985.9 985.2 980.8 991.0 981.8 987.5 985.9 984.7 990.5 980.6 972.5 983.7 1997 983.2 988.5 985.6 981.5 994.5 997.5 985.4 980.9 989.5 986.2 991.7 994.1 1998 981.0 990.1 984.6 991.4 995.2 991.2 973.9 980.5 984.3 976.2 979.6 978.1 1999 984.7 980.0 990.0 983.8 988.3 992.2 985.1 985.0 986.6 981.0 983.4 978.2 2000 976.4 990.6 996.7 983.1 993.0 992.1 999.4 986.9 996.7 984.1 989.4 983.4 2001 983.5 982.8 982.7 982.0 993.7 987.2 990.5 977.3 986.4 980.2 975.5 978.4 2002 983.1 982.4 986.5 982.7 988.3 985.7 990.0 993.7 997.2 984.0 984.5 985.2 2003 987.6 981.6 992.2 988.5 985.6 991.9 979.2 984.1 986.5 979.6 979.3 989.5 2004 981.8 992.7 983.7 986.9 988.4 983.4 985.9 987.0 974.0 984.8 990.4 986.0 2005 981.7 981.9 985.8 978.9 989.1 991.3 992.5 987.4 995.0 988.9 986.0 990.2 2006 987.4 990.9 976.8 987.0 984.2 993.7 988.9 994.8 987.1 986.5 978.3 980.8 2007 985.8 982.8 984.5 985.5 994.5 985.7 988.7 982.4 992.5 978.3 985.5 979.9 2008 981.9 984.6 986.0 981.5 988.2 988.6 990.9 985.3 995.8 979.2 979.1 976.8 2009 981.0 981.6 982.9 985.4 981.7 983.5 986.6 996.8 984.4 973.0 980.2 984.0 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - 981.8 982.1 - 996.7 985.9 - 989.5 - - - - 2017 - 990.3 998.3 989.7 987.5 983.9 980.3 983.8 975.0 979.5 982.9 - 2018 981.5 981.4 978.2 984.8 984.7 989.4 988.9 984.0 987.3 989.8 976.4 976.7 2019 979.7 986.3 988.1 983.2 984.7 989.3 997.3 991.5 985.6 985.5 981.6 989.0 2020 985.9 989.7 983.5 985.4 993.0 988.9 996.8 988.9 981.8 980.5 980.3 979.7 2021 982.9 984.0 980.8 983.9 990.9 992.2 988.1 981.3 980.6 977.0 983.0 978.3 2022 984.3 982.3 989.8 983.8 989.3 982.8 984.4 990.8 985.6 - 979.4 981.0 2023 981.2 984.8 977.5 984.7 980.5 990.6 991.6 982.7 991.5 977.3 981.0 982.1 2024 981.4 984.2 985.8 979.9 - - - - - - - -