Country= U.S.A. Station= ROCKY REACH DAM, WA River= COLUMBIA RIVER Area= 227388.52 Lat= 47.52 Lon= -120.3 Source= USGS PointID= 12453700 Area Units= km2 Discharge Units= m3/sec Starting Year= 1940 Ending Year= 1993 Total Years= 54 Total Usable Years= 53 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1940 2.41 2.9 2.39 1.38 1.79 1.48 1.22 1.88 1.04 2.58 2.8 2.5 2.03 1941 2.33 2.3 2.39 2.05 8.27 100.7 23.01 10.64 33.09 240.86 85.15 33.75 45.38 1942 26.47 21.77 8.88 3.57 15.24 7.59 3.03 4.1 17.51 13.67 21.78 15.75 13.28 1943 15.32 6.05 3.07 2.51 3.49 2.44 2.51 2.07 2.5 3.4 2.76 2.86 4.08 1944 2.91 2.91 3 2.31 1.9 1.53 1.52 2.56 3.05 2.94 2.74 2.86 2.52 1945 2.68 2.56 2.21 2.34 1.57 1.63 5.28 1.92 1.8 3.39 2.54 2.47 2.53 1946 3.01 2.76 2.42 1.72 1.35 1.19 0.96 1.21 1.1 1.13 1.05 1.5 1.62 1947 1.64 1.45 1.58 1.2 2.02 2.1 1.22 0.71 0.72 0.64 0.76 1.4 1.29 1948 1.29 1 1 1.05 0.91 0.82 0.97 0.77 0.76 0.83 1.06 1.35 0.98 1949 1.5 1.4 1.14 1.33 1.16 1.3 0.83 0.95 0.99 1.16 0.99 1.08 1.15 1950 1.29 1.27 1.12 0.91 2.28 0.73 0.83 1 1.3 2.28 1.32 1.66 1.33 1951 1.66 1.41 1.19 1.12 1.3 0.81 0.84 0.7 1.15 0.79 0.84 0.89 1.06 1952 1.05 1.03 1.08 0.81 0.71 0.7 0.73 0.55 0.54 0.59 0.7 0.88 0.78 1953 0.88 0.92 0.78 0.52 0.4 0.32 0.28 0.3 0.33 0.62 0.52 0.59 0.54 1954 0.61 0.65 0.63 0.81 0.59 1.75 0.64 0.35 0.2 2.47 0.65 0.69 0.84 1955 0.8 0.95 0.85 0.54 0.52 0.58 0.89 0.77 0.96 1.15 0.7 0.79 0.79 1956 1.24 1.26 1.1 0.73 0.36 0.3 0.54 0.39 0.44 0.61 0.67 0.68 0.69 1957 0.63 1.55 1.22 4.04 1.33 0.76 0.51 0.42 0.56 1.57 1.5 0.92 1.25 1958 1.02 0.93 1.34 0.57 0.44 0.3 0.55 0.28 3.63 1.4 0.93 0.86 1.02 1959 0.88 0.86 0.74 0.68 0.69 0.48 0.74 0.29 0.29 0.48 0.66 0.8 0.63 1960 0.92 0.95 0.77 0.54 0.31 0.56 0.99 0.61 0.75 1.32 0.81 0.91 0.79 1961 1 1.01 1.71 0.9 0.39 1.08 1.04 0.55 0.66 0.95 1.14 0.99 0.95 1962 0.96 0.95 0.94 0.62 1.14 0.49 0.52 0.38 0.47 1.29 5.21 1.16 1.18 1963 0.88 0.83 0.67 0.44 0.3 0.71 0.5 0.26 0.29 0.31 0.56 0.68 0.54 1964 0.69 0.68 1.44 0.48 0.26 0.22 0.11 0.16 0.69 0.44 0.49 0.57 0.52 1965 0.59 0.77 0.59 0.39 0.37 1.63 0.34 1.08 0.72 1.15 0.49 0.5 0.72 1966 0.54 0.55 0.47 0.54 0.42 0.9 0.22 0.62 0.74 0.49 0.63 0.54 0.56 1967 0.56 0.59 0.63 0.51 0.33 0.41 0.48 0.26 0.52 0.48 0.57 0.68 0.5 1968 0.69 0.78 0.91 0.49 0.37 0.16 0.36 0.38 0.58 0.72 0.75 0.9 0.59 1969 0.84 0.81 1.01 2.38 1.54 0.47 0.28 0.12 0.44 1.27 1.05 1.12 0.94 1970 1.03 1.05 1.31 0.97 0.47 0.25 0.17 0.28 0.63 0.82 0.73 0.76 0.71 1971 0.79 0.78 0.68 0.76 0.46 0.28 0.18 1.03 0.64 1.26 0.75 1.36 0.75 1972 0.91 0.86 0.63 0.46 0.96 0.89 0.45 0.99 1.21 0.52 0.64 0.62 0.76 1973 0.78 0.82 0.87 0.84 0.5 0.24 1.58 0.64 0.71 0.39 0.37 0.76 0.71 1974 1.06 0.84 0.55 0.68 0.51 0.22 0.16 0.62 5.14 11.83 4.62 1.96 2.35 1975 1.72 1.64 1.33 1.01 0.8 0.26 0.46 1.34 1.23 0.95 0.85 0.85 1.04 1976 1.28 1.21 0.81 0.59 0.6 0.48 0.46 0.57 1.01 0.58 1.01 0.99 0.8 1977 1.01 0.92 1.09 0.92 0.41 0.35 0.34 0.33 0.49 0.56 0.54 0.55 0.63 1978 0.61 0.68 0.55 0.33 0.53 0.82 0.27 0.35 1.09 4.18 3.26 1.93 1.22 1979 1.59 0.99 0.98 0.73 0.45 0.56 0.57 0.33 0.17 0.27 0.58 0.96 0.68 1980 0.96 0.95 0.74 0.67 0.49 1 0.16 0.53 1.27 2.6 2.13 2.32 1.15 1981 1.54 1.22 1.74 1.15 1.08 1.4 0.58 1.07 1.63 1.48 1.12 1.07 1.26 1982 0.9 0.41 0.84 0.63 0.88 0.59 0.16 0.22 0.32 0.57 0.71 0.72 0.58 1983 0.93 0.84 0.72 0.61 0.24 0.08 0.2 0.3 0.17 0.64 0.58 0.44 0.48 1984 0.52 0.5 0.53 0.64 0.56 0.41 0.3 0.15 0.23 0.81 1.02 1.15 0.57 1985 1.01 0.66 0.8 0.32 0.22 0.62 0.97 0.33 0.48 0.77 0.66 0.69 0.63 1986 0.74 0.67 0.79 0.59 0.62 0.82 1.09 0.95 1.2 1.57 1.65 1.92 1.05 1987 2.12 2.01 2.7 2.64 5.59 18.39 12.08 3.34 3.84 3.2 2.13 1.54 4.97 1988 1.85 1.54 1.45 2.63 1.71 1.33 1.45 0.83 1.05 0.82 1.14 1 1.4 1989 0.96 1.13 1.1 0.55 0.89 0.55 0.38 0.46 0.99 0.82 0.86 0.94 0.8 1990 0.98 0.89 0.93 0.49 0.81 0.44 0.27 1.52 1.74 1.71 2.15 1.24 1.1 1991 1.21 1.11 0.96 0.7 0.46 0.52 0.4 0.45 1.44 0.87 1.12 1.2 0.87 1992 1.26 1.45 1.33 0.75 3.13 3.2 1.12 0.77 1.14 0.9 0.92 0.95 1.41 1993 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 1.94 1.64 1.33 1.08 1.4 3.17 1.43 1.01 1.99 6.21 3.23 2.04 2.21 Std Dev 3.95 2.93 1.22 0.83 2.36 13.78 3.46 1.54 4.95 32.63 11.74 4.86 6.26