Year Ordinal_date_of_snowmelt Measurement_method 1935 153 Runoff 1936 152 Runoff 1937 144 Runoff 1938 149 Runoff 1939 135 Runoff 1940 130 Runoff 1941 158 Runoff 1942 146 Runoff 1943 147 Runoff 1944 142 Runoff 1945 139 Runoff 1946 140 Runoff 1947 142 Runoff 1948 155 Runoff 1949 150 Runoff 1950 138 Runoff 1951 148 Runoff 1952 166 Runoff 1953 153 Runoff 1954 129 Runoff 1955 135 Runoff 1956 145 Runoff 1957 172 Runoff 1958 151 Runoff 1959 136 Runoff 1960 136 Runoff 1961 136 Runoff 1962 149 Runoff 1963 133 Runoff 1964 142 Runoff 1965 153 Runoff 1966 133 Runoff 1967 144 Runoff 1968 150 Runoff 1969 141 Runoff 1970 148 Runoff 1971 141 Runoff 1972 138 Runoff 1973 147 Runoff 1974 137 Runoff 1975 157 Runoff 1976 136 Observed 1977 116 Observed 1978 155 Observed 1979 152 Observed 1980 159 Observed 1981 119 Observed 1982 152 Observed 1983 160 Observed 1984 156 Observed 1985 145 Observed 1986 149 Observed 1987 132 Observed 1988 136 Observed 1989 132 Observed 1990 138 Observed 1991 142 Observed 1992 124 Observed 1993 156 Observed 1994 140 Observed 1995 170 Observed 1996 141 Observed 1997 152 Observed 1998 140 Observed 1999 145 Observed 2000 131 Observed 2001 134 Observed 2002 115 Observed 2003 142 Observed 2004 129 Observed 2005 146 Observed 2006 132 Observed 2007 121 Observed 2008 153 Observed 2009 131 Observed 2010 132 Observed 2011 158 Observed 2012 114 Observed 2013 135 Observed 2014 146 Observed 2015 127 Observed 2016 139 Observed