Country= U.S.A. Station= PIERRE SD River= MISSOURI R Area= 630627.62 Lat= 44.37 Lon= -100.37 Source= USGS PointID= 6440000 Area Units= km2 Discharge Units= m3/sec Starting Year= 1939 Ending Year= 1993 Total Years= 55 Total Usable Years= 54 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1939 458.95 1383.49 1150.13 988.64 235.04 163.35 100.31 80.41 40.9 150.12 210.23 435.49 449.75 1940 215.9 457.13 957.85 2372.4 535.47 519.93 237.11 71.43 117.77 74.09 284.66 1005.16 570.74 1941 640.56 323.79 713.73 820.38 173.56 393.49 131.82 178 78.81 109.5 221.67 364.06 345.78 1942 404.26 666.57 1659.83 1025.87 535.55 263.15 346.44 156.84 217.92 491.72 884.91 946.56 633.3 1943 1241.84 1030.54 1041.33 936.84 1370.45 604.97 177.58 134.54 57.6 100.84 292.51 180.93 597.5 1944 308.13 550.36 1315.64 1132.96 779.63 332.18 106.51 52.4 73.21 144.43 169.57 427.33 449.36 1945 411.44 981.88 2464.31 956.83 805.12 455.78 230.57 152.64 345.34 791.87 827.89 514.07 744.81 1946 802.19 457.27 1018.59 254.85 848.88 1126.83 235.71 136.1 52.39 151.29 173.68 400.27 471.5 1947 1072.3 531.52 784.76 1514.49 1179.27 829.39 221.69 149.68 136.44 59.1 181.38 428.5 590.71 1948 320.76 867.92 1400.5 1465.4 771.68 420.38 268.51 182.59 51.89 118.31 270.71 576.02 559.56 1949 1179.81 903.31 715.14 865.65 489.38 137.27 156.78 113.94 97.53 60.7 104.48 586.28 450.86 1950 1390.64 1130.15 1260.65 1181.29 592.74 385.79 250.27 136.2 248.81 233.95 1001.83 1200.73 751.09 1951 1373.92 1316.74 1203.11 1252.93 470.31 523.04 347.76 69 56.88 53.53 361.18 677.69 642.17 1952 1942.45 982.4 1150.22 922.1 979.71 211.47 68.17 74.93 62.29 54.48 172.25 434.76 587.94 1953 618.47 655.34 976.3 845.92 1079.97 712.24 104.7 125.36 89.06 56.78 76.05 281.06 468.44 1954 454.07 656.64 1016.58 1115.41 550.45 295.78 90.16 96.42 75.89 755.13 325.67 784.29 518.04 1955 811.93 751.21 1635.35 722.65 295.37 247.66 110.14 127.24 55.1 339.18 682.06 476.49 521.2 1956 187.24 1205.13 1697.65 1423.59 1208.31 517.81 589.58 651.98 496.95 182.17 207.21 824.65 766.02 1957 749.42 701.35 703.08 1577.45 475.98 230.76 197.58 54.53 50.52 49.02 103.14 695.08 465.66 1958 362.15 247.81 861.29 1036.59 908.18 412.55 599.19 428.85 357.36 212.7 419.5 368.36 517.88 1959 1155.46 1205.19 1009.27 1001.38 622.7 228 155.83 82.76 53.19 295.78 664.51 1034.67 625.73 1960 969.99 770.71 468.4 1329.48 856.34 514.27 150.34 94.2 74.36 48.29 78.23 65.58 451.68 1961 128 902.36 1405.62 1402.82 748.57 469.34 166.33 171.22 83.62 62.85 320.43 377.8 519.91 1962 565.19 453.45 1066.45 1166.28 339.94 192.45 59.77 50.57 63.75 185.59 345.4 190.54 389.95 1963 332.57 202.94 1740.16 867.44 326.26 191.95 79.66 65.98 53.55 34.76 123.59 275.35 357.85 1964 648.58 335.82 2049.47 1210.93 447.9 188.24 138.86 187.95 66.32 58.85 106.71 680.38 510 1965 1032.64 968.64 997.95 995.34 464.07 180.21 70.56 59.65 96.87 154.52 515.97 522.04 504.87 1966 558.42 991 988.17 784.85 919.08 172.71 55.05 66.92 64.36 68.93 297.89 810.21 481.47 1967 313.34 553.13 1149.93 906.33 901.58 185.71 265.13 274.66 261.49 729.5 792.4 753.23 590.54 1968 530.78 805.26 717.15 514.36 725.37 343.74 173.89 131.66 130.95 158.89 524.31 850.33 467.22 1969 819 804.22 294.73 1077.93 638.23 203.03 256.97 177.75 115.82 128.94 321.97 649.77 457.36 1970 447.63 959.04 802.65 1306.45 633.94 314.73 277.98 196.11 302.04 599.1 1068.78 1074.58 665.25 1971 548.35 892.03 1302.31 610.99 510.4 233.28 132.77 159.53 221 143.61 190.52 911.08 487.99 1972 902.67 388.98 1660.38 1076.71 581.43 1288.57 980.69 160.57 176.18 282.94 819.19 1336.47 804.57 1973 574.05 631.51 1194.16 727.65 802.83 459.75 150.38 153.41 111.59 240.87 515.14 773.42 527.9 1974 1090.94 633.39 1151.22 1020.07 729.39 262.62 363.81 130.69 332.96 220.56 625.03 862.57 618.6 1975 850.7 1202.16 1275.54 642.98 560.59 791.18 157.1 163.39 528.47 601.14 415.69 781.18 664.18 1976 771.23 1511.74 1202.92 460.68 339.43 248.14 249.4 243.98 167.16 590.64 414.26 414.78 551.2 1977 189.07 478.1 1567.12 969.95 331.98 129.51 597.04 591 637.25 738.97 785.85 1378.76 699.55 1978 817.81 411.29 964.12 1106.72 868.77 354.29 204.17 182.03 166.05 289.04 320.98 777.53 538.57 1979 1089.11 496.93 1556.16 1181.67 482.94 267.65 182.14 287.94 423.6 670.47 566.62 732.41 661.47 1980 573.93 285.86 924.43 1305.22 478.74 479.46 361.73 614.84 203.32 277.64 444.48 619.49 547.43 1981 331.77 1444.98 908.15 879.62 726.5 673.66 269.98 220.67 336.33 564.83 638.64 702.44 641.46 1982 587.62 892.49 1197.35 789.63 379.47 726.21 269.36 137.24 123.04 118.01 445.58 716.88 531.91 1983 615.37 513.65 671.78 799.48 1019.87 470.13 250.69 170.95 103.9 142.2 492.98 1061.25 526.02 1984 344.28 1170.37 934.92 1088.41 1116.51 887.45 495.26 510.45 197.75 173.16 651.39 867.87 703.15 1985 527.46 734.25 1453.3 882.73 241.12 267.47 269.78 137.17 160.19 164.75 1280.64 951.09 589.16 1986 740.99 1268.5 802.38 576.65 273.8 770.45 531.73 205.48 171.67 572.53 639.86 1088.74 636.9 1987 425.08 275.33 666.73 1208.38 448.01 332.19 581.84 197.08 641.7 420.04 410.22 915.37 543.5 1988 433.2 851.66 701.35 627.91 613.47 154.08 105.8 89.5 151.27 208.86 519 413.65 405.81 1989 569.71 681.36 690.11 1059.76 1192.23 1297.48 438.79 139.47 178.75 236.75 479.63 345.39 609.12 1990 995.11 1487.05 588.9 820.25 789.17 332.56 557.74 216.32 642.44 976.21 610.8 1186.94 766.96 1991 1203.75 934.76 1081.07 605.23 352.12 106.44 106.71 78.22 83.21 86.48 94.91 302.65 419.63 1992 465.77 545.84 761.18 982.69 400.88 118.87 557.89 512.08 536.1 492.44 993.83 792.6 596.68 1993 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 686.96 786.75 1105.03 1007.39 650.9 418.88 263.63 185.82 193.02 276.43 453.44 681.94 559.18 Std Dev 362.28 339.51 399.67 331.56 282.29 280.03 184.46 142.47 165.78 238.55 281.51 301.67 106.12