Schwerdtfeger 00Z pressure 1985 - 986.7 984.4 985.3 - 981.8 972.7 982.5 974.0 974.6 970.8 979.6 1986 987.6 992.7 991.0 980.6 993.5 990.6 980.4 982.5 978.5 973.1 976.1 982.1 1987 992.4 988.8 987.0 988.1 983.9 987.8 992.9 975.9 988.6 979.8 978.4 985.3 1988 988.4 984.1 986.8 983.5 990.2 996.4 975.9 976.4 983.6 989.7 981.6 982.6 1989 984.5 986.1 984.2 988.5 971.5 980.6 979.7 983.3 984.4 974.5 975.4 988.5 1990 988.6 982.2 985.6 992.0 997.1 988.4 997.8 - 972.6 981.7 983.0 983.9 1991 982.0 988.8 981.8 986.5 987.3 990.2 - 983.4 980.1 978.6 982.9 994.7 1992 987.8 996.0 988.0 985.0 990.7 994.6 982.1 - - - - - 1993 - 977.7 984.0 979.5 980.9 976.6 969.1 - - 958.7 962.5 966.2 1994 967.7 965.9 960.9 967.5 966.8 981.2 971.9 - - - - - 1995 - - - - - - - - - - - - 1996 - 990.3 984.6 977.2 983.9 981.5 980.9 987.3 987.1 970.5 985.6 983.1 1997 985.5 987.5 976.6 981.7 969.9 983.7 975.4 974.0 977.8 974.1 984.1 987.4 1998 982.1 977.3 978.1 970.9 979.0 972.6 976.1 975.0 984.3 976.1 970.1 978.2 1999 979.6 984.0 981.5 978.1 974.4 995.6 975.8 980.0 978.5 961.0 967.9 970.8 2000 975.1 979.8 980.1 980.0 979.7 981.8 977.4 980.0 985.2 971.8 977.7 992.6 2001 988.2 984.4 981.3 975.7 981.3 978.7 982.7 979.2 975.1 968.9 972.6 973.4 2002 980.1 974.5 986.7 977.6 988.4 990.9 984.4 974.6 982.4 985.4 980.0 975.2 2003 987.3 986.4 981.6 974.4 974.7 989.1 975.8 973.9 977.0 969.5 979.4 990.0 2004 981.9 991.7 981.6 975.3 978.9 975.4 975.7 978.1 978.6 976.6 972.8 987.3 2005 983.7 975.6 979.8 975.8 976.7 985.9 977.6 973.5 972.8 967.9 975.6 991.1 2006 982.3 981.1 981.5 983.6 973.5 978.0 973.2 986.6 979.6 972.2 974.6 979.3 2007 982.4 979.4 985.4 980.1 982.6 981.5 992.1 974.8 974.0 - - - 2008 - 978.4 983.1 984.8 981.4 976.2 978.5 - 970.4 971.8 976.7 978.6 2009 979.3 985.3 980.5 981.7 988.3 - 987.8 986.1 980.4 975.6 980.8 980.6 2010 994.3 989.3 983.3 979.2 982.0 974.8 967.3 971.7 978.9 973.0 972.1 987.0 2011 989.4 983.8 988.2 986.1 976.2 984.7 982.3 984.6 - - - 974.4 2012 976.0 983.0 - - - - - - - - - - 2013 - 976.3 973.5 981.4 981.5 992.3 977.9 987.2 987.5 979.8 977.4 982.6 2014 987.1 982.1 980.8 977.3 980.8 979.0 980.9 971.9 980.9 969.9 982.8 980.5 2015 982.5 975.3 979.6 978.4 982.2 982.1 973.0 974.7 972.2 975.8 974.0 983.7 2016 977.4 978.8 977.0 982.6 980.1 974.7 984.6 986.7 969.5 976.7 988.9 985.8 2017 990.6 986.1 987.2 978.3 973.9 978.8 976.6 973.0 974.3 979.7 973.0 981.5 2018 981.5 980.5 981.9 983.9 981.1 984.8 980.4 987.4 971.7 970.1 973.4 979.5 2019 983.5 985.2 982.7 979.2 983.3 970.2 984.7 980.6 969.9 979.2 988.8 991.8 2020 988.8 980.2 977.5 979.6 976.4 975.5 981.0 983.3 981.6 970.2 974.5 974.1 2021 978.4 975.8 984.9 978.6 981.3 978.8 985.7 985.7 973.0 977.0 972.6 972.0 2022 980.9 977.4 978.4 978.9 975.7 989.0 972.7 975.4 971.4 977.1 973.1 973.9 2023 975.5 981.4 982.5 989.5 978.5 985.3 982.2 984.2 977.2 973.4 979.6 976.0 2024 979.5 982.1 980.2 973.2 974.0 973.1 986.5 989.9 982.6 - - -