Results
| Country: | U.S.A.
| | Station: | GREAT FALLS, MT. | | River: | MISSOURI RIVER | | Area: | 25976424.46 | | Lat: | 47.57 | | Lon: | -111.06 | | Source: | USGS | | PointID: | 6090300 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1942 | | Ending Year: | 1995 | | Total Years: | 54 | | Total Usable Years: | 46 | |
| |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
|---|
| 1942 | 29.71 | 33.05 | 123.29 | 129.13 | 67.29 | 108.64 | 105.04 | 323.8 | 368.31 | 319.49 | 195.68 | 44.8 | 154.02 |
| 1943 | 28.59 | 44.82 | 301.71 | 324.29 | 65.95 | 139.2 | 94.25 | 361.25 | 525.85 | 535.1 | 416.17 | 375.98 | 267.76 |
| 1944 | 233.56 | 140.87 | 90.27 | 99.42 | 45.34 | 75.45 | 97.25 | 449.87 | 356.02 | 397.35 | 363.87 | 316.15 | 222.12 |
| 1945 | 319.71 | 47.38 | 87.59 | 55.64 | 38.32 | 38.69 | 36.04 | 217.47 | 470.16 | 438.37 | 173.34 | 45.49 | 164.02 |
| 1946 | 38.64 | 39.44 | 110.91 | 65.6 | 66.91 | 76.72 | 164.33 | 449.67 | 447.6 | 333.76 | 73.8 | 91.25 | 163.22 |
| 1947 | 115 | 50.57 | 151.91 | 513.2 | 395.34 | 326.31 | 335.51 | 677.78 | 713.21 | 703.91 | 387.66 | 238.41 | 384.07 |
| 1948 | 146.7 | 140.51 | 149.26 | 330.74 | 355.8 | 310.48 | 687.83 | 716.42 | 752.95 | 809.04 | 416.54 | 203.21 | 418.29 |
| 1949 | 194.75 | 211.67 | 175.47 | 294.07 | 254.83 | 114.43 | 356.18 | 623.16 | 575.4 | 474.36 | 178.83 | 149.68 | 300.24 |
| 1950 | 118.38 | 84.75 | 75.73 | 336.98 | 253.43 | 146.85 | 143.56 | 492.08 | 541.61 | 571.55 | 353.03 | 195.11 | 276.09 |
| 1951 | 205.44 | 207.93 | 173.46 | 479.31 | 374.6 | 162.18 | 181.71 | 559.85 | 682.82 | 777.26 | 635.34 | 280.89 | 393.4 |
| 1952 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1953 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1954 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1955 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1956 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1957 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1958 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1959 | 178.49 | 192.56 | 327.75 | 276.21 | 226.48 | 239 | 237.54 | 214.53 | 222.38 | 225.53 | 211.76 | 203.97 | 229.68 |
| 1960 | 174.38 | 204.96 | 517.56 | 310.26 | 216.54 | 197.82 | 206.47 | 223.01 | 204.14 | 207.36 | 206.84 | 215.48 | 240.4 |
| 1961 | 224.34 | 234.93 | 233.57 | 221.06 | 218.97 | 224.34 | 327.35 | 202.85 | 277.38 | 344.13 | 261.58 | 251.47 | 251.83 |
| 1962 | 305.91 | 331.01 | 345.74 | 304.61 | 124.52 | 233.36 | 274.26 | 178.92 | 135.5 | 110.02 | 143.87 | 225.27 | 226.08 |
| 1963 | 192.37 | 292.17 | 283.86 | 149.27 | 118.12 | 178.26 | 156.89 | 108.24 | 130.29 | 127.96 | 112.56 | 227.08 | 173.09 |
| 1964 | 321.35 | 287.17 | 124.14 | 131.27 | 208.08 | 149.49 | 148.69 | 147.5 | 201.01 | 178.52 | 120.26 | 278.79 | 191.36 |
| 1965 | 345.83 | 362.86 | 338.8 | 415.22 | 516.56 | 431.17 | 476.09 | 432.88 | 443.54 | 431.7 | 424 | 358.79 | 414.79 |
| 1966 | 274.95 | 381.88 | 440.56 | 410.97 | 419.37 | 306.38 | 248.16 | 187.4 | 170.66 | 152.56 | 256.29 | 325.97 | 297.93 |
| 1967 | 322.08 | 365.69 | 383.83 | 516.31 | 484.49 | 416.35 | 304.6 | 332.5 | 357.17 | 350.4 | 373.5 | 302.49 | 375.78 |
| 1968 | 350.86 | 398.39 | 403.2 | 210.08 | 190.13 | 189.9 | 323.93 | 296.89 | 331.06 | 366.36 | 365.19 | 318.47 | 312.04 |
| 1969 | 358.99 | 408.88 | 407.49 | 603.34 | 418.07 | 271.68 | 344.5 | 368.3 | 325.91 | 304.66 | 337.82 | 320.92 | 372.55 |
| 1970 | 317.42 | 434.67 | 301.62 | 367.44 | 407.63 | 471.86 | 428.41 | 406.85 | 415.22 | 379.22 | 359.63 | 317.42 | 383.95 |
| 1971 | 406.12 | 465.71 | 460.56 | 474.03 | 418.82 | 377.42 | 300.08 | 318.3 | 270.12 | 242.24 | 234.09 | 243.56 | 350.92 |
| 1972 | 357.34 | 402 | 488.79 | 422.02 | 395.25 | 386.83 | 262.07 | 310.39 | 263.99 | 250.74 | 254.45 | 275.86 | 339.14 |
| 1973 | 318.67 | 377.12 | 419.88 | 251.33 | 182.74 | 180.65 | 188.98 | 217.16 | 212.11 | 117.38 | 102.06 | 216.76 | 232.07 |
| 1974 | 243.66 | 303.3 | 318.89 | 318.03 | 218.99 | 340.27 | 317.71 | 366.2 | 362.84 | 319.25 | 312.2 | 268.72 | 307.5 |
| 1975 | 322.45 | 382.68 | 363.19 | 345.47 | 511.26 | 754.74 | 1049.01 | 572.46 | 422.96 | 411.14 | 420.32 | 361.73 | 493.12 |
| 1976 | 395.89 | 494.08 | 585.98 | 511.97 | 418.28 | 666.77 | 486.78 | 412.88 | 418.05 | 357.18 | 422.49 | 302.72 | 456.09 |
| 1977 | 359.63 | 451.25 | 313.15 | 183.55 | 171.2 | 197.09 | 251.85 | 231.95 | 201.64 | 162.08 | 189.74 | 290.39 | 250.29 |
| 1978 | 350.22 | 426.98 | 401.46 | 545.76 | 272.04 | 337.35 | 345.76 | 385.84 | 425.04 | 398.17 | 370.95 | 337.98 | 383.13 |
| 1979 | 372.87 | 439.72 | 466.5 | 929.84 | 742.45 | 420.41 | 413.43 | 377.32 | 262.25 | 233.1 | 221.56 | 291.85 | 430.94 |
| 1980 | 338.62 | 377.1 | 323 | 223.07 | 198.12 | 254.31 | 368.85 | 380.45 | 358.97 | 278.81 | 264.4 | 285.09 | 304.23 |
| 1981 | 351.04 | 359.63 | 325.76 | 226.53 | 295.86 | 392 | 405.39 | 402.74 | 399.65 | 346.38 | 324.52 | 340.44 | 347.49 |
| 1982 | 384.38 | 419.6 | 492.72 | 575.31 | 357.98 | 494.32 | 382.19 | 279.19 | 225.71 | 215.47 | 224.61 | 327.22 | 364.89 |
| 1983 | 377.71 | 395.93 | 288.72 | 211.6 | 220.53 | 200.89 | 285.58 | 285.07 | 245.9 | 182.12 | 234.5 | 331.86 | 271.7 |
| 1984 | 379.08 | 392.53 | 289.79 | 214.43 | 269.44 | 282.24 | 256.16 | 289.25 | 268.02 | 284.45 | 331.13 | 349.4 | 300.49 |
| 1985 | 378.63 | 400.48 | 255.24 | 276.66 | 369.58 | 321.4 | 276.32 | 263.7 | 213.27 | 197.38 | 204.97 | 333.41 | 290.92 |
| 1986 | 407.86 | 409.08 | 396.05 | 218.32 | 281.44 | 249.02 | 248.34 | 220.74 | 214.18 | 357.68 | 200.58 | 196.76 | 283.34 |
| 1987 | 236.4 | 327.47 | 260.93 | 204.09 | 178.6 | 206.09 | 227.84 | 238.5 | 189.68 | 172.26 | 155.2 | 295.54 | 224.38 |
| 1988 | 317.52 | 340.78 | 252.75 | 187.97 | 195.16 | 192.34 | 218.46 | 211.36 | 147.91 | 138.96 | 235.51 | 321.9 | 230.05 |
| 1989 | 334.32 | 353.96 | 326.1 | 247.58 | 214.37 | 262.25 | 256.23 | 263.83 | 251.29 | 293.48 | 323.95 | 302.44 | 285.82 |
| 1990 | 359.9 | 330.6 | 220.98 | 174.06 | 214.4 | 221.09 | 222.22 | 226.48 | 228.02 | 241.61 | 219.49 | 212.38 | 239.27 |
| 1991 | 231.1 | 226.54 | 251.96 | 191.09 | 238.74 | 250.45 | 274.85 | 218.98 | 219.51 | 225.67 | 142.16 | 226.84 | 224.82 |
| 1992 | 233.57 | 227.32 | 231.66 | 230.53 | 216.21 | 222.05 | 215.15 | 169.52 | 106.78 | 96.28 | 99.45 | 214.13 | 188.55 |
| 1993 | 230.19 | 208.33 | 211.28 | 214.87 | 209.13 | 206.13 | 265.37 | 219.26 | 148.6 | 127.24 | 112.72 | 197.76 | 195.91 |
| 1994 | 216.58 | 200.95 | 258.42 | 236.86 | 354.31 | 324.41 | 245.74 | 247.55 | 220.95 | 165 | 151.27 | 299.61 | 243.47 |
| 1995 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
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| Avg | 276.11 | 295.85 | 298.95 | 307.81 | 274.17 | 272.81 | 292.24 | 327.83 | 324.47 | 312.01 | 263.48 | 263.29 | 292.42 |
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| Std Dev | 101.39 |
129.3 |
123 |
164.2 |
141.09 |
140.99 |
161.33 |
138.58 |
154.56 |
164.75 |
115.35 |
76.08 |
83.42 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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