Harry 18Z temperature 1987 -8.3 -17.8 -37.0 -39.2 -38.3 -31.2 -33.7 -40.4 -38.8 -28.8 -21.8 -7.7 1988 -8.3 -19.6 -33.0 -33.8 -33.3 -35.5 -37.3 -31.4 -37.4 -28.1 -18.5 -7.5 1989 -8.5 -21.1 -28.6 -28.2 -39.0 -47.7 - - - - - - 1990 - - - - - - - - - - - - 1991 - -14.8 -32.6 -32.8 -34.5 -34.4 -41.3 -41.9 -34.4 -27.7 -17.3 -6.4 1992 -7.0 -18.5 -21.2 -37.8 -33.2 -36.3 -34.7 -44.4 - - -18.0 -8.1 1993 -8.3 -17.5 -31.8 -34.9 -41.0 -31.8 -33.9 -41.9 - - -18.0 -10.5 1994 -11.2 -21.7 -34.6 -29.7 -42.8 -40.0 -35.9 - - - - -8.0 1995 -10.3 -13.6 -26.4 -28.0 -31.1 -24.1 -32.4 -31.1 -28.3 -24.5 -16.8 -9.4 1996 -9.7 -16.5 -25.5 -19.7 - -26.9 - -33.6 -39.0 - -14.1 - 1997 -9.4 -18.9 -31.7 -42.4 -36.0 -34.1 -40.1 -45.7 -38.9 -24.4 -13.5 -8.5 1998 -10.3 -15.6 -29.8 -41.3 -34.2 -30.3 -45.1 -39.8 -43.4 -29.9 -19.8 -9.9 1999 - -19.1 -23.5 -31.8 -29.9 -30.4 -28.1 -32.9 -25.5 -20.7 -14.7 -11.6 2000 -13.8 -16.4 -20.9 -29.0 -28.8 -27.0 -27.0 -30.2 -30.2 -22.5 -14.8 -13.1 2001 -13.3 -14.7 -24.5 -25.3 -27.2 -25.5 -29.4 -38.3 -29.9 -26.7 -17.4 -11.9 2002 -10.6 -17.1 -21.9 -27.9 -25.4 -32.1 -33.5 -32.7 -21.6 -23.0 -14.3 -11.7 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -