Country= U.S.A. Station= NORTH CLIFF AVE AT SIOUX FALLS SD River= BIG SIOUX R Area= 13508.64 Lat= 43.57 Lon= -96.71 Source= USGS PointID= 6482020 Area Units= km2 Discharge Units= m3/sec Starting Year= 1933 Ending Year= 1993 Total Years= 61 Total Usable Years= 60 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1933 330.82 280.58 728.97 670.97 418.57 287.93 61.68 38.15 44.72 43.4 209.75 445.31 296.74 1934 560.95 107.25 567.8 592.84 102.22 42.7 30.28 29.27 32.44 37.39 262.39 244.67 217.52 1935 606.03 304.31 793.33 287.22 465.64 167.21 180.66 115.99 66.37 52.61 135.45 329.11 291.99 1936 242.8 290.69 1784.61 766.16 247.97 74.75 40.86 37.26 26.92 52.34 279.61 404.32 354.02 1937 1516.6 434.54 328.76 944.28 596.21 515.51 228.38 231.05 86.1 183.21 325.39 512.68 491.89 1938 386.91 1078.78 744.55 671.4 207.12 162.58 149.82 124.76 187.53 80.78 204.68 268.82 355.64 1939 344.09 860.43 810.51 680.13 142.98 76.12 52.72 55.46 27.49 133.87 177.36 383.4 312.05 1940 167.57 312.66 601.42 1645.5 394.43 356.59 144.66 45.61 90.56 62.64 220.03 818.12 404.98 1941 473.2 221.53 504.86 619.44 130.57 179.49 79.76 70.83 33.66 67.67 131.8 244.14 229.75 1942 272.71 402.1 1205.94 700.9 397.75 156.26 320.58 122.52 183.54 350.68 673.94 616.99 450.33 1943 787.4 765.47 750.58 658.18 1025.71 454.99 116.83 102.49 42.16 81.34 220.62 142 428.98 1944 198.36 379.86 788.22 809.21 508.43 237.03 72.76 33.14 54.13 83.64 113.37 235.29 292.79 1945 226.44 560.47 1672.26 671.25 536.1 359.67 188.02 103.93 211.9 656.7 566.34 359.36 509.37 1946 557.75 320.14 679.31 160.01 648.74 714.02 150.59 60.43 27.82 84.74 123.41 287.86 317.9 1947 800.73 395.63 562.69 1281.25 848.51 616.7 157.01 80.22 91.28 42.41 106.06 333.44 442.99 1948 202.07 582.45 1082.28 893.78 507.42 236.31 144.57 103.96 33.35 88.96 191.46 313.8 365.03 1949 773.42 541.88 493.11 627.88 378.74 98.23 84.97 77.73 71.01 46.34 79.79 414.48 307.3 1950 992.56 708.94 901.76 937.2 431.83 258.26 154.39 100.92 175.41 182.02 787.67 820.69 537.64 1951 873.08 873.38 888.79 830.44 267.5 278.78 217.02 44.93 38.68 37.32 295.56 499.38 428.74 1952 1390.64 688.18 829.66 606.44 638.13 132.91 44.46 42.37 46.5 38.74 134.4 342.56 411.25 1953 406.75 447.8 703.45 544.44 828.5 458.57 62.32 78.89 62.43 38.69 61.77 227.5 326.76 1954 343.87 515.28 708.38 874.9 415.06 192.73 55.15 33.92 35.36 406.12 228.94 543.74 362.79 1955 557.13 446.09 1172.05 504.61 195.94 132.48 64.88 70.86 34.2 264.15 538.53 408.4 365.78 1956 138.66 653.83 1237.82 1012.52 855.6 339.97 340.69 454 438.5 134.47 176.39 594.67 531.43 1957 539.48 414.44 485.23 1075.86 364.4 187.69 148.33 39.83 31.37 32.03 78.88 498.95 324.71 1958 212.34 150.48 544.87 757.2 529.51 338.71 419.03 199.29 253.17 159.49 323.83 258.05 345.5 1959 819 855.88 742.45 742.94 396.03 178.39 116.69 56.44 40.33 233.72 527.55 761 455.87 1960 654.31 541.34 340.39 875.66 548.66 357.77 96.35 66.36 37.24 25.14 46.86 37.72 302.32 1961 59.79 605.58 827.86 985.53 508.88 329.13 105.2 79.38 61.53 45.06 232.21 269.03 342.43 1962 373.74 263.75 652.57 733.41 255.44 152.85 41.48 36.48 35.18 125.51 263.84 126.95 255.1 1963 192.28 108.41 1179.59 698.62 245.98 131.91 56.72 42.36 38.36 22.71 102.1 192.24 250.94 1964 441.93 209.5 1429.21 825.72 282.63 112.85 107.52 152.06 48.01 40.83 81.27 488.83 351.7 1965 657.69 712.19 635.95 714.91 367.66 148.58 57.75 47.32 65.6 110.98 432.44 434.48 365.46 1966 403.52 643.12 751.13 553.24 523.82 132.29 40.63 46.11 42.21 46.21 238.11 618.95 336.61 1967 250.64 342.71 562.32 612.39 595.23 139.07 237.68 241.11 247.06 636.77 653.65 586.34 425.41 1968 415.35 562.24 487.69 334.57 416.43 202.88 145.03 100.35 102.97 136.43 436.8 694.04 336.23 1969 622.15 578.68 219.35 826.76 465.5 161.81 213.99 128.33 94.01 102.17 238.99 501.79 346.13 1970 316.36 582.52 490.61 893.87 454.74 155.61 221.93 133.23 244.77 529.86 852.15 759.9 469.63 1971 332.98 544.19 846.86 487.75 317.01 173 93.85 81.54 104.57 100.9 148.46 668.52 324.97 1972 669.93 279.02 1152.32 674.61 432.15 838.24 738.72 120.26 117.45 218 598.22 925.97 563.74 1973 440.89 425.96 888.59 427.77 507.79 341.64 99.62 119.86 90.64 158.29 318.36 507.8 360.6 1974 721.44 475.93 851.06 752.76 553.88 149.71 258.58 98.77 186.79 183.56 544.9 565.24 445.22 1975 591.28 762.07 868.51 440.1 355.03 592.11 115.37 136.04 361.67 424.56 303.07 632.57 465.2 1976 502.31 1145.57 1010.28 331.54 293.34 183.5 182.98 162.51 137.46 355.62 333.06 329.94 414.01 1977 180.13 368.83 1080.89 641.87 247.94 106.62 322.1 459.2 605.07 610.14 660.67 1077.23 530.06 1978 550.63 297.53 600.96 800.78 539.08 195.2 114.26 113.76 108.05 213.44 250.28 506.23 357.52 1979 784.47 283.98 994.38 895.95 318.81 172.82 115.94 183.82 290.49 411.07 395.31 574.47 451.79 1980 474.56 189.82 619.32 910.5 253.5 318.99 196.9 381.77 149.83 236.72 348.05 454.61 377.88 1981 312.13 856.99 550.08 593.53 548.09 489.28 159.17 175.7 243.97 467.18 546.29 523.5 455.49 1982 408.95 564.72 837 619.3 268.74 541.48 213.45 112.37 106.22 106.44 399.09 597.85 397.97 1983 538.86 372.81 514.04 515.57 690.66 296.32 173.75 149.88 87.59 111.52 379.48 810.05 386.71 1984 228.34 851.79 681.71 712.36 903.4 674.31 309.84 274.03 162.18 149.83 532.94 588.54 505.77 1985 392.42 579.18 1132.77 531.26 108.65 171.97 193.33 107.71 118.21 138.95 956.07 656.82 423.94 1986 525.05 707.42 507.71 406.74 202.52 663.55 375.62 153.23 142.89 440.37 363.64 796.16 440.41 1987 247.28 158.22 492.62 802.5 272.9 220.57 484.87 155.74 530.23 350.41 342.61 695.87 396.15 1988 308.55 529.47 466.58 479.78 415.75 109.56 87.1 80.22 110.48 178.68 412.22 329.24 292.3 1989 397.33 426.47 395.36 767.7 844.52 1000.82 305.81 99.16 127.45 163.83 372.84 263.41 430.39 1990 701.17 1132.48 433.91 584.7 602.34 167.9 312.46 145.71 527.38 811.14 483.84 879.75 565.23 1991 791.87 655.24 792.51 409.23 255.14 83.56 84.54 70.2 76.81 79.9 74.45 195.6 297.42 1992 371.74 403.84 480.8 762.01 300.8 89.22 456.47 391.88 463.48 430.58 852.72 538.12 461.81 1993 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 493.02 512.58 768.14 702.83 439.61 280.66 175.77 123.35 138.88 197.3 339.5 485.61 388.1 Std Dev 275.26 243.08 309.64 236.42 205.27 203.07 130.4 96.47 135.91 183.63 216.32 217.72 82.44