Schwerdtfeger 12Z pressure 1985 - 986.2 984.4 984.5 - 981.7 972.3 982.8 973.2 974.8 970.3 979.0 1986 986.7 992.6 990.9 980.3 993.7 991.4 979.7 982.7 978.4 972.8 975.2 981.0 1987 992.4 988.3 986.8 988.4 983.3 988.3 993.5 975.7 988.6 979.3 978.1 984.9 1988 988.2 984.3 986.0 983.7 990.4 995.7 976.9 976.5 983.6 990.1 980.8 982.1 1989 984.4 985.5 984.3 987.6 971.6 980.7 979.6 984.5 983.3 974.3 975.8 988.3 1990 987.6 982.2 985.4 991.8 998.2 988.2 997.3 981.4 971.7 981.8 982.5 983.5 1991 981.6 988.3 981.9 986.0 987.5 990.1 992.3 983.0 981.1 977.8 982.7 994.2 1992 987.6 995.6 987.5 985.0 990.0 994.9 982.3 - - - - - 1993 - 977.1 983.9 979.2 981.0 975.1 968.3 - - - 962.2 965.7 1994 967.2 965.2 960.6 966.9 967.2 980.8 - - - - - - 1995 - - - - - - - - - - - - 1996 - 989.8 983.9 977.0 984.4 981.3 980.5 987.8 987.0 969.7 984.6 982.7 1997 985.4 986.4 976.4 981.2 969.4 983.8 976.1 973.7 977.5 973.5 984.4 986.8 1998 981.8 977.3 977.9 971.1 978.8 973.1 976.2 975.2 984.6 975.7 969.8 978.1 1999 979.2 984.0 981.3 977.6 974.6 995.5 975.3 979.6 978.2 960.6 967.9 970.9 2000 974.9 979.2 979.9 979.5 979.1 981.5 978.4 980.2 984.9 971.8 977.5 992.2 2001 987.7 984.3 981.2 975.1 981.5 979.1 983.4 979.4 974.4 968.9 972.3 973.1 2002 979.7 973.8 986.6 977.1 988.8 991.2 984.9 974.2 982.5 985.3 979.2 974.8 2003 986.3 - - - - 988.3 974.5 - - - - - 2004 - - - - - - - - - - - - 2005 - 974.9 978.3 973.9 975.4 984.3 977.2 972.9 971.3 966.4 974.4 990.7 2006 981.3 - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -