Ferrell 18Z wind_speed 1981 - 10.2 12.7 11.8 16.8 13.2 11.0 11.2 10.2 9.5 9.0 7.6 1982 7.1 9.2 9.1 10.5 9.1 13.4 8.1 15.8 10.4 10.6 13.3 9.9 1983 5.5 7.7 14.2 17.0 17.1 9.7 10.1 - - - - - 1984 6.2 11.0 12.2 15.3 11.7 16.8 11.0 9.6 9.7 - - - 1985 - 7.6 13.1 10.2 12.8 - - - - - - - 1986 - 7.6 9.1 10.4 16.6 7.3 - - - - - - 1987 - 9.6 7.7 7.7 13.0 12.5 10.1 10.3 9.0 7.8 5.2 7.2 1988 6.5 6.1 10.9 12.4 14.6 15.2 9.7 17.9 13.2 12.4 7.0 8.0 1989 9.7 7.0 9.3 13.3 - - - - - 12.5 12.9 5.9 1990 5.5 10.7 10.6 12.6 13.7 12.6 10.6 11.3 8.7 11.0 8.7 12.2 1991 6.0 9.8 10.7 12.9 15.4 13.7 - - - - 11.8 11.1 1992 7.1 8.8 18.3 9.7 11.3 10.4 12.1 - - - - - 1993 - 14.3 12.4 11.7 10.2 16.8 9.9 13.2 11.5 9.1 6.8 5.8 1994 8.2 8.4 9.1 10.2 12.4 10.5 13.1 10.3 7.1 12.0 8.9 8.0 1995 8.8 9.8 8.4 9.4 12.1 13.3 8.1 12.1 13.3 9.6 11.1 9.1 1996 8.6 6.5 8.1 10.2 9.1 13.8 - 12.0 7.4 9.6 10.0 8.8 1997 6.3 10.3 7.9 7.1 15.7 - - - - 14.4 15.4 7.0 1998 5.4 9.1 9.8 7.8 - - - - - - - - 1999 - 8.0 - - - - - - - - - - 2000 0.0 - - - - - - - - - - - 2001 - 6.9 5.9 6.3 10.1 16.5 13.4 5.7 9.7 11.7 9.4 9.5 2002 5.5 7.7 14.1 10.7 14.4 11.5 3.5 - - 10.4 9.2 7.4 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - 9.4 8.3 2007 8.3 11.4 11.0 8.6 11.8 15.9 14.8 16.1 14.7 12.5 12.1 11.2 2008 10.1 11.0 9.5 11.9 12.7 18.5 11.9 5.1 19.4 10.2 - - 2009 - - - - - - - - - - - -