Marsh 18Z msl_pressure 1970 993.6 986.9 994.5 983.5 989.1 995.9 994.1 993.7 989.6 992.8 990.3 990.8 1971 988.7 991.1 986.5 990.7 1002.7 994.4 999.2 984.5 990.6 991.9 985.1 994.2 1972 994.5 991.5 991.2 988.6 993.8 994.7 990.3 1001.1 988.8 995.5 986.6 992.5 1973 992.5 986.2 984.3 980.9 988.9 997.2 1002.4 987.6 988.9 993.4 989.3 985.0 1974 - - - - - - - - - - - - 1975 993.4 987.3 986.4 990.7 992.5 999.0 996.9 990.5 992.3 985.4 986.1 985.0 1976 994.4 990.3 994.1 987.8 986.4 995.5 982.6 980.8 989.5 991.9 997.7 1001.2 1977 995.6 988.7 991.4 990.3 985.0 994.1 1002.2 994.2 984.3 988.9 988.6 997.3 1978 990.1 993.0 994.7 994.1 1003.5 985.3 1003.1 986.4 995.7 985.7 995.6 988.4 1979 996.3 990.2 996.3 985.9 999.0 991.3 990.3 989.8 993.2 987.5 994.8 998.0 1980 992.5 994.7 992.9 996.5 998.3 987.2 1001.3 997.0 994.5 991.8 987.3 995.3 1981 991.8 984.7 1001.4 999.6 994.5 997.2 998.1 991.5 992.3 991.5 984.0 989.1 1982 993.6 988.9 985.1 986.7 993.0 1003.6 991.5 997.8 994.2 987.1 992.3 996.0 1983 995.8 989.3 991.1 1000.7 1001.7 994.7 991.0 991.5 994.8 986.5 983.4 988.0 1984 989.5 990.5 998.2 986.7 994.8 1000.4 1001.5 992.7 999.4 992.0 985.6 1001.9 1985 996.5 985.7 990.3 990.8 996.3 1008.2 986.7 986.3 986.8 995.4 989.7 982.2 1986 986.6 990.0 990.7 990.1 999.3 983.2 985.7 985.8 987.9 993.6 984.1 985.6 1987 989.7 993.2 984.7 989.2 996.7 992.6 993.8 1000.8 989.4 989.5 983.6 988.1 1988 993.6 990.8 988.0 992.5 998.1 995.4 991.1 1000.4 992.4 1001.0 983.1 984.0 1989 992.1 987.7 989.4 992.5 986.5 984.8 996.3 998.7 991.5 983.4 984.8 991.8 1990 990.8 992.3 985.3 991.5 1003.4 985.2 993.4 980.6 993.3 978.2 973.6 988.2 1991 988.0 992.2 989.9 991.8 988.4 991.0 992.7 987.9 998.1 986.0 988.6 998.6 1992 991.0 988.0 990.5 995.1 998.9 1002.1 996.9 991.2 988.1 986.6 994.6 995.8 1993 995.2 994.9 989.0 989.4 990.0 992.9 994.0 988.6 985.2 985.0 985.6 985.6 1994 985.1 986.7 993.4 995.4 996.9 997.0 995.1 990.6 980.9 990.7 994.1 989.2 1995 992.9 992.6 984.4 993.1 992.7 989.9 989.9 995.5 989.5 993.5 983.1 987.1 1996 991.5 990.3 986.9 996.9 986.5 992.7 990.4 990.6 996.1 986.6 978.5 989.3 1997 988.6 994.3 991.4 987.2 1000.2 1002.7 990.9 986.5 995.1 991.8 997.7 999.5 1998 987.0 995.2 991.0 996.2 1000.6 996.5 978.5 985.9 991.3 981.1 983.8 983.3 1999 990.0 985.6 995.8 988.8 993.7 997.6 990.3 990.1 992.0 986.5 988.7 983.6 2000 982.4 995.7 1002.5 988.1 998.8 997.4 1004.5 992.7 1002.2 989.7 994.8 988.8 2001 988.9 987.8 987.8 988.0 998.9 992.2 996.7 982.3 991.3 985.8 981.1 983.6 2002 988.5 986.8 992.0 988.3 993.7 991.8 995.5 999.4 1002.7 989.0 990.2 990.4 2003 992.9 987.0 997.3 993.7 991.4 997.5 984.7 989.0 991.7 985.0 984.9 994.9 2004 986.7 997.7 989.1 992.4 995.4 989.1 991.7 991.6 979.5 990.2 995.8 991.4 2005 986.8 987.4 991.4 984.2 994.7 996.4 997.9 992.3 999.9 993.5 991.3 995.3 2006 992.7 995.8 981.2 992.4 988.5 997.9 993.8 999.3 991.4 991.0 982.4 985.3 2007 990.3 987.8 989.2 991.3 999.0 991.4 994.3 987.8 997.6 983.4 990.4 985.3 2008 987.9 989.5 990.9 987.5 993.5 993.6 996.5 991.0 1001.0 984.4 984.3 982.6 2009 985.9 986.6 988.0 990.2 986.8 988.8 992.2 1001.8 989.5 978.5 985.2 989.1 2010 990.5 992.1 988.9 - 986.3 987.2 - 990.2 - 988.4 987.9 - 2011 992.3 990.1 - 986.8 989.7 992.0 - 1004.7 993.1 988.3 989.5 - 2012 985.0 984.7 991.5 996.2 994.0 977.9 989.0 989.1 994.7 982.8 986.2 993.8 2013 988.4 989.0 997.4 987.5 987.0 981.2 984.3 991.8 998.1 984.7 980.7 986.9 2014 991.1 989.7 - 996.8 994.2 993.9 994.6 996.3 997.4 982.1 980.7 982.7 2015 990.9 988.0 988.1 989.8 989.3 984.5 986.1 985.0 985.5 992.6 983.8 - 2016 - 986.3 985.7 - 1002.9 992.4 - 994.8 - - - - 2017 - 995.5 1003.3 994.6 - 988.6 985.5 - - 984.1 988.3 - 2018 985.9 987.1 982.7 989.1 990.1 993.8 - 989.2 992.6 - 981.0 981.0 2019 984.8 991.0 991.8 988.0 990.0 993.3 1002.3 995.8 990.5 989.8 987.1 993.7 2020 990.8 994.5 989.0 990.5 998.3 994.2 1001.6 992.9 988.2 984.2 985.5 984.5 2021 987.9 989.8 986.2 989.6 997.2 997.1 993.2 985.8 986.4 981.5 988.0 984.1 2022 988.2 987.9 994.6 990.1 994.2 988.6 990.0 994.0 990.3 - 984.1 985.9 2023 986.2 989.1 982.7 989.7 985.5 995.5 995.1 986.8 995.8 983.6 984.4 987.1 2024 986.4 989.4 990.5 985.1 - - - - - - - -