Country= U.S.A. Station= ST. REGIS, MT. River= CLARK FORK Area= 44053817.12 Lat= 47.3 Lon= -115.09 Source= USGS PointID= 12354500 Area Units= km2 Discharge Units= m3/sec Starting Year= 1958 Ending Year= 1996 Total Years= 39 Total Usable Years= 38 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1958 168.08 166.71 154.82 181.29 224.84 209.91 189.43 136.99 140.78 140.82 142.54 128.27 165.37 1959 129.75 125 112.31 104.23 225.38 315.17 174.36 87.25 64.66 151.27 253.46 302.59 170.45 1960 125.78 114.05 126.48 231.04 291.68 220.65 112.5 108.32 119.86 133.11 129.45 129.66 153.55 1961 146.55 137 100.85 86.93 99.13 83.97 103.65 109.39 95.34 100.53 130.45 143.52 111.44 1962 140.49 133.33 144.3 128.44 145.73 268.43 122.95 119.5 122.75 135.03 131.86 115.88 142.39 1963 131.82 156.21 123.18 113.09 220.65 457.79 182.53 107.26 124.38 135.18 141.83 148.22 170.18 1964 135.74 127.06 123.65 115.51 347.56 618.63 266.77 120.05 125.31 134.93 154.88 170.81 203.41 1965 162.23 184.36 202.72 273.72 406.76 447.6 356.66 141.41 196.93 317.88 268.92 182.64 261.82 1966 168.26 153.32 178.07 204.19 180.39 125.19 107.59 103.79 88.72 90.02 97.73 159.03 138.02 1967 195.66 195.71 185.98 146.84 225.35 507.25 320.14 164.28 128.63 124.42 131.11 151.69 206.42 1968 170.36 183.13 273.31 239.38 262.32 353.02 212.9 149.21 152.04 187.6 176.12 174.7 211.17 1969 180.95 194.07 222.38 329.25 361.53 313.68 344.27 166.07 135.08 128.79 149.81 169.83 224.64 1970 176.84 174.25 174.25 235.3 426.14 445.73 263.49 180.64 149.05 152.54 180.07 168.34 227.22 1971 192.19 208.36 210.17 285.79 451.06 301.57 285.77 159.78 159.45 176.88 175.56 174.24 231.74 1972 188.72 199.68 200.63 238.45 319.6 316.77 217.45 178.52 157.58 176.41 176.86 168.89 211.63 1973 154.42 144.72 124.17 110.56 139.1 153.28 134.2 97.97 85.82 120.65 158.98 162.74 132.22 1974 171.77 174.82 183.79 216.17 258.83 396.35 227.27 166.81 147.81 121.1 116.62 160.84 195.18 1975 182.87 169.09 194.08 222.94 470.96 543.21 551.52 218.07 185.42 199.48 234.78 226 283.2 1976 203.29 205.61 240.2 341.79 560.77 423.62 251.95 198.57 192.97 180.85 182.84 184.03 263.87 1977 186.89 180.17 149.75 160.89 148.06 95.49 88.18 104.45 87.83 114.82 142.76 171.41 135.89 1978 178.85 194.17 231.13 240.18 322.74 299.46 283.64 182.77 179.19 153.68 183.22 195.26 220.36 1979 197.31 177.08 182.01 213.8 241.4 197.08 123.07 113.45 108.1 108.09 108.61 142.88 159.41 1980 169.87 136.56 146.76 173.8 185.3 497.25 245.15 134.32 97.52 145.01 168.43 166.78 188.9 1981 177.42 189.19 188.15 152.19 363.79 686.97 223.52 142.24 109.22 105.47 133.8 158.58 219.21 1982 177.12 184.87 197.62 223.29 285.24 498.28 378.81 181.9 150.16 176.54 174.71 174.54 233.59 1983 177.31 181.02 190.57 196.26 267.96 277.39 355.55 191.45 155.68 179.66 238.17 198.81 217.49 1984 204.25 219.04 219.3 239.3 325.82 497.15 342.73 224.01 282.89 217.83 199.04 201.61 264.41 1985 184.33 186.39 172.41 191.41 187.75 122 81.21 89.55 99.43 164.43 187.24 151.36 151.46 1986 152.19 171.01 168.23 182.14 238.97 277.11 168.81 141.11 135.53 131.11 168.28 162.14 174.72 1987 166.74 126.45 119.48 138.52 115.45 100.55 111.23 102.37 100.76 100.06 113.49 113.91 117.42 1988 124.32 114.96 105.98 113.49 139.9 99.2 87.08 89.59 97 88.69 93.9 100.09 104.52 1989 112.81 136.63 167.08 169.42 204.58 146.58 98.07 96.31 95.51 95.8 105.09 130.45 129.86 1990 134.73 143.64 131.04 145.62 148.99 145.62 100.74 117.22 112.37 98.16 96.23 134.98 125.78 1991 149.35 126.29 96.09 108.06 191.35 276.67 178.31 128.07 129.7 110.58 111.26 132.74 144.87 1992 140.3 132.1 118.96 100.83 100.67 98.48 95.47 90.89 91.28 90.02 95.59 109.61 105.35 1993 125.69 124.49 110.28 138.66 271.05 363.61 343.67 247.51 208.88 192.55 187.84 187.44 208.47 1994 186.59 174.35 157.12 185.02 206.92 127.11 101.01 89.73 91.34 102.49 101.91 112.73 136.36 1995 116.57 149.53 162.78 182 402.48 420 324.7 178.53 179.64 171.81 174.37 179.11 220.13 1996 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 162.85 163.01 165.53 185.78 262.27 308.63 214.64 141.04 133.81 143.53 155.73 161.75 183.21 Std Dev 25.61 28.93 42.45 62.3 109.54 160.58 108.78 42.03 42.9 44.74 44.3 36.24 48.57