source: http://www.wrh.noaa.gov/wrh/techMemos/273.pdf and NWS-Flagstaff daily climate summaries for recent years 1900 70 (estimate) 1901 125 1902 77 1903 128 1904 41 1905 92 1906 64 1907 86 1908 69 1909 73 1910 83 1911 34 1912 71 1913 65 1914 40 1915 117 1916 130 1917 111 1918 29 1919 70 1920 75 1921 53 1922 97 1923 97 1924 55 1925 50 1926 29 1927 49 1928 39 1929 50 1930 57 1931 18 1932 93 1933 66 1934 11 1935 44 1936 16 1937 98 1938 42 1939 70 1940 48 1941 62 1942 65 1943 64 1944 100 1945 84 1946 52 1947 32 1948 107 1949 167 1950 63 1951 74 1952 106 1953 60 1954 89 1955 68 1956 43 1957 53 1958 72 1959 54 1960 78 1961 54 1962 129 1963 47 1964 89 1965 167 1966 83 1967 63 1968 150 1969 135 1970 96 1971 57 1972 50 1973 210 1974 70 1975 141 1976 132 1977 70 1978 116 1979 146 1980 177 1981 92 1982 122 1983 143 1984 32 1985 136 1986 105 1987 122 1988 105 1989 78 1990 113 1991 128 1992 159 1993 150 1994 110 1995 117 or: 99 (est) 1996 29 (est) 1997 108 (est) 1998 137 1999 72 2000 74 2001 125 2002 39 2003 55 2004 51 2005 131 2006 45 2007 51 2008 100 2009 86 2010 144 2011 88 2012 103 2013 70