BOISE AIR TERMINAL (101022) First/Last Dates Snowfall > 0.0 inches Years: 1940-2005 Year Last First Length 1940 Feb 13 Nov 10 270 1941 Jan 15 Dec 4 322 1942 Mar 16 Nov 26 254 1943 Mar 17 Dec 19 276 1944 Feb 16 Dec 19 306 1945 Mar 3 Nov 6 247 1946 Feb 6 Oct 30 265 1947 Jan 30 Nov 5 278 1948 Mar 25 Nov 17 236 1949 Feb 15 Dec 9 296 1950 Mar 8 Dec 1 267 1951 Mar 30 Dec 3 247 1952 Mar 23 Dec 3 254 1953 Apr 12 Dec 1 232 1954 Apr 30 Dec 10 223 1955 Apr 19 Nov 1 195 1956 Mar 5 Nov 1 240 1957 Mar 3 Dec 2 273 1958 Mar 15 Dec 30 289 1959 Mar 10 Dec 13 277 1960 Mar 12 Nov 15 247 1961 Mar 11 Nov 20 253 1962 Mar 11 Nov 17 250 1963 Apr 20 Nov 22 215 1964 May 2 Nov 17 198 1965 Apr 10 Nov 26 229 1966 Apr 26 Oct 13 169 1967 Apr 28 Nov 29 214 1968 Apr 21 Nov 13 205 1969 Apr 6 Oct 12 188 1970 May 12 Oct 26 166 1971 Mar 16 Oct 27 224 1972 Apr 29 Dec 3 217 1973 Mar 17 Nov 20 247 1974 Mar 8 Nov 23 259 1975 May 3 Nov 22 202 1976 Apr 15 Dec 4 232 1977 Mar 28 Nov 19 235 1978 Feb 15 Nov 28 285 1979 Apr 11 Nov 22 224 1980 Mar 27 Nov 23 240 1981 Apr 3 Nov 24 234 1982 Apr 6 Nov 10 217 1983 May 8 Nov 28 203 1984 Apr 24 Nov 27 216 1985 Apr 19 Nov 9 203 1986 Feb 20 Nov 7 259 1987 Feb 22 Nov 24 274 1988 Apr 7 Nov 24 230 1989 Feb 4 Nov 26 294 1990 Mar 11 Nov 21 254 1991 Mar 25 Oct 29 217 1992 Jan 13 Nov 9 300 1993 Mar 4 Nov 23 263 1994 Feb 21 Nov 16 267 1995 Mar 23 Nov 10 231 1996 Mar 25 Dec 20 269 1997 Dec 20 Jan 22 397 1998 Jan 22 Dec 24 335 1999 Apr 3 Dec 7 247 2000 Mar 9 Dec 15 280 2001 Mar 2 Nov 24 266 2002 Mar 19 Dec 10 265 2003 Apr 6 Nov 25 232 2004 Mar 4 Nov 27 267 2005 Feb 19 Miss - Prob 100% 100% Average Mar 18 Nov 23 Prob is the probability of occurrence. Average is the mean date for years with an occurrence 8/30/05 http://www.wrh.noaa.gov/boise/index.shtml