Ferrell 12Z pressure 1981 - 987.7 989.7 991.6 985.0 979.2 987.0 995.5 988.9 980.8 977.1 978.5 1982 989.7 986.5 978.1 980.2 986.8 979.7 989.4 975.6 976.2 980.1 984.5 994.5 1983 991.8 994.7 984.9 979.4 985.4 989.1 981.2 - - - - - 1984 993.8 988.9 979.4 980.3 987.9 980.9 975.8 985.6 980.9 - - - 1985 - 988.8 987.1 987.3 - - 975.7 986.3 975.5 977.1 - - 1986 - 993.6 991.6 981.3 992.5 992.3 981.2 984.5 979.5 974.2 975.9 981.4 1987 - 988.6 987.8 989.9 984.0 988.8 993.9 976.1 989.6 980.2 979.3 986.0 1988 988.7 985.5 986.3 984.7 990.9 995.7 978.1 976.3 985.3 990.8 981.9 982.4 1989 984.8 985.6 984.8 989.1 - - - - - 975.7 976.0 988.9 1990 988.3 983.1 987.1 993.7 1000.1 989.4 999.1 982.7 974.1 983.1 984.8 984.9 1991 983.7 989.9 983.7 988.2 989.4 992.5 - - - - 984.9 995.3 1992 988.9 997.8 988.4 987.3 992.7 997.3 984.8 - - - - - 1993 - 977.7 985.6 981.3 983.2 976.1 972.1 978.2 977.0 976.1 979.1 982.3 1994 983.8 982.5 978.4 985.4 985.2 998.8 989.1 975.1 989.6 977.4 983.9 980.2 1995 980.2 980.8 990.7 983.4 981.0 988.5 1001.7 986.3 977.6 979.9 977.5 977.2 1996 985.4 990.3 985.1 978.6 985.9 982.2 982.4 987.8 989.5 971.8 986.7 984.9 1997 988.4 989.0 980.1 985.9 973.3 987.7 980.2 978.0 980.9 976.7 986.8 990.1 1998 985.3 980.7 982.2 976.1 982.7 977.5 980.9 - - - - - 1999 - 987.4 - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - 988.2 985.7 979.3 985.6 982.3 987.6 984.1 979.1 972.4 976.0 976.5 2002 983.2 977.9 990.4 981.2 992.3 995.3 989.6 979.2 986.9 989.9 983.4 978.7 2003 990.6 989.7 985.3 978.4 977.9 993.0 979.4 978.4 980.5 973.8 982.0 992.9 2004 985.0 994.7 985.0 979.8 982.2 979.5 978.9 983.1 983.7 979.7 976.2 990.2 2005 985.9 979.4 983.4 980.0 980.7 989.2 982.4 978.0 978.3 972.2 979.5 994.8 2006 985.7 984.9 985.5 988.3 978.0 981.7 978.8 990.2 983.3 975.8 978.7 982.9 2007 986.3 983.0 989.9 984.7 986.6 986.4 996.9 979.2 978.3 982.4 981.8 975.7 2008 979.9 979.9 984.8 985.6 983.7 977.3 980.4 982.9 972.0 974.1 978.3 980.1 2009 980.5 985.6 982.3 982.7 990.1 990.0 990.1 988.4 983.1 976.4 982.4 981.9 2010 995.0 989.7 984.8 980.5 982.1 977.2 969.6 973.4 980.6 974.2 973.6 988.1 2011 990.5 984.7 989.8 988.2 977.8 986.3 983.9 987.4 989.6 978.2 985.4 975.7 2012 976.9 984.5 983.1 981.5 978.6 991.6 979.7 983.2 979.0 977.8 987.7 - 2013 986.3 978.3 976.5 983.4 983.4 994.8 979.9 990.4 989.6 981.5 978.7 984.3 2014 - - 982.3 980.2 983.1 981.8 984.2 973.0 - - - - 2015 - 976.8 982.5 980.1 984.9 984.5 975.3 976.7 975.2 977.8 975.3 985.0 2016 977.9 980.6 978.2 984.7 983.3 977.4 988.0 987.9 971.9 978.5 990.8 987.1 2017 991.8 988.1 988.0 981.4 975.9 981.5 978.6 974.4 977.2 981.1 974.7 983.3 2018 982.9 981.7 983.8 987.0 984.1 986.1 983.3 989.7 973.3 971.8 975.3 980.1 2019 984.5 986.3 984.5 981.5 985.0 971.8 987.9 981.3 971.7 981.5 990.3 993.2 2020 989.8 981.5 978.7 981.6 979.2 978.3 982.8 984.2 983.9 971.7 976.0 975.3 2021 980.1 977.7 986.0 981.2 982.9 982.2 987.6 988.6 974.1 978.9 974.2 972.9 2022 981.7 979.3 980.7 981.8 977.8 990.3 975.7 977.8 974.7 979.1 975.2 975.6 2023 977.6 983.1 985.2 991.8 981.5 988.7 984.3 987.3 978.7 975.5 981.2 977.2 2024 980.5 984.0 981.2 975.2 976.2 975.7 989.2 991.7 984.8 - - -