Country= U.S.A. Station= SHEFFIELD, TEX.(DISC) River= PECOS RIVER Area= 81839.15 Lat= 30.66 Lon= -101.77 Source= USGS PointID= 8447000 Area Units= km2 Discharge Units= m3/sec Starting Year= 1925 Ending Year= 1993 Total Years= 69 Total Usable Years= 68 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1925 200.34 80.11 58.45 38.87 61.05 31.25 21.08 12.53 14.66 89.73 697.49 163.85 122.45 1926 388.94 229.63 465.66 781.27 440.01 136.38 107.87 111.93 37.28 26.86 40.11 153.78 243.31 1927 556.77 394.08 601.05 619.48 487.97 152.14 125.41 69.95 25.83 62.54 40 102.99 269.85 1928 122.59 92.69 286.6 353 199.35 167.15 99.35 62.87 20.96 17.31 45.29 117.49 132.05 1929 372.78 369.94 502.51 263.47 401.35 570.63 68.14 27.9 27.62 19.74 172.13 179.54 247.98 1930 411.4 533.98 278.91 138.48 222.59 425.55 34.1 20.33 25.84 69.73 63.37 362.74 215.58 1931 470.07 328.77 384.07 181.99 246.39 42.99 28.76 23.37 23.77 15.74 28.41 373.1 178.95 1932 1078.97 1259.42 1002.24 218.65 100.03 48.17 35.73 20.23 13.93 13.44 14.56 140.26 328.8 1933 349.86 516.08 556.64 412.45 249.22 143.13 240.16 770.22 59.89 33.6 28.54 63.18 285.25 1934 553.79 593.34 760.08 647.42 174.75 49.16 27.84 16.29 13.41 19.26 67.39 239.16 263.49 1935 369.54 415.68 376.65 227 928.25 505.43 177.42 52.75 49.38 36.72 116.52 381.87 303.1 1936 113.33 150.74 92.82 46.14 99.96 61.66 111.5 23.59 19.97 44.06 34.23 119.02 76.42 1937 539.37 441.96 293.24 340.43 99.78 65.88 27.73 21.96 38.57 56.95 57.58 124.57 175.67 1938 555.01 556.83 379.52 871.3 367.78 72.94 67.3 86.15 32.28 20.2 52.37 56.45 259.84 1939 416.51 478.76 515.46 213.84 120.19 73.96 27.39 24.2 11.72 15.78 22.77 79.75 166.69 1940 264.32 499.72 119.49 213.34 257.22 250.15 161.18 383.98 84.62 32.3 297.44 1340.67 325.37 1941 916.92 389.14 616.95 302.36 531.5 649.88 535.02 98.44 107.66 123.91 516.45 301.27 424.13 1942 270.98 273.36 430.13 544.99 583.06 415.6 154.02 92.5 177.71 46.76 56.95 79.73 260.48 1943 236.36 120.83 132.09 172.92 84.84 163.98 262.07 47.76 30.15 39.47 47.05 69 117.21 1944 383.85 398 525.87 603.44 1314.64 716.41 64.9 37.3 86.88 35.73 68.99 306.11 378.51 1945 958.76 678.39 642.07 1600.76 426.07 139.32 394.21 152.74 55.1 236 142.28 281.15 475.57 1946 819.15 1138.44 813.34 469.69 460.01 934.74 354.19 82.47 68.32 65.58 374.1 601.23 515.11 1947 1012.29 410.12 558.39 445.99 272.14 147.44 58.25 23.23 31.71 23.95 85.83 347.46 284.73 1948 379.9 623.36 494.45 380.02 205.3 183.52 41.27 19.75 16.06 12.94 123.53 81.11 213.43 1949 344.15 575.85 561.68 572.57 290.08 141.31 107.22 108.62 44.45 230.36 192.22 345.3 292.82 1950 720.35 938.91 806.94 183.93 607.63 1137.5 140.77 90.85 62.68 51.22 49.18 51 403.41 1951 210.1 211.04 247.02 310.24 160.66 71.84 69.92 21.5 40.35 26.21 28.4 87.57 123.74 1952 76.95 362.18 297.7 478.57 448.5 243.89 94.82 34.22 13.71 10.71 18.48 110.51 182.52 1953 157.52 313.91 611.28 217.09 1869.56 583.61 120.75 102.18 55.66 28.15 32.91 140.6 352.77 1954 172.25 163 88.66 172.15 443.54 103.99 22.38 14.56 9.86 11.09 79.91 47.35 110.73 1955 97.23 341.75 161.64 452.17 179.16 103.63 64 288.61 88.47 37.04 27.13 55.67 158.04 1956 86.07 357.63 160.05 162.7 206.66 42.73 19.46 10.3 9.23 8.06 20.45 104.65 99 1957 46.36 139.78 312.05 425.23 1140.99 660.16 302.52 43.84 62.91 138.69 659.5 519.72 370.98 1958 428.28 389.97 295.12 272.07 683.99 248.42 126.63 74.3 349.24 313.8 86.75 85.31 279.49 1959 80.62 475.32 265.67 322.59 302.86 128.85 110.44 95.15 38.72 81.83 75.5 210.48 182.34 1960 437.18 469.57 484.59 138.5 96.12 63.97 89.97 43.5 37.44 59.41 137.92 476.18 211.2 1961 1007.17 622.67 581.05 496.09 95.84 120.44 248.39 94.1 292.3 62.51 148.9 589.24 363.23 1962 402.02 320.22 266.04 164.28 305.43 138.99 59.47 38.11 52.5 37.41 38.49 95.87 159.9 1963 150.27 131.47 120.2 77.08 124.7 39.15 41.95 21.01 86.72 13.03 37.49 79.42 76.87 1964 111.45 91.13 275.1 205.16 178.52 53.17 24.57 18.18 15.18 14.26 16.3 76.47 89.96 1965 67.71 184.45 228.02 261.85 153.11 303.34 52.34 17.09 23.23 20.63 19.67 117 120.7 1966 155.31 703.62 145.89 105.84 933.82 292.2 36.93 34.09 35.82 28.8 34.36 52.13 213.23 1967 83.8 84.9 74.41 158.51 57.88 51.9 22.8 10.81 9.43 8.26 9.27 48.01 51.66 1968 120.1 44.15 71.7 179.39 175.72 486.7 158.13 92.83 159.94 76.23 61.46 495.46 176.82 1969 306.34 252 778.17 941.35 679.7 301.45 95 100.24 90.9 22.78 41.61 49.9 304.95 1970 64.35 97.57 276.56 363.05 227.12 40.43 56.18 75.57 89.22 154.39 80.09 60.88 132.12 1971 124.35 94.16 151.1 29.18 42.6 56.97 43.1 39.19 17.58 29.12 27.79 401.45 88.05 1972 579.22 298.46 130.11 70 146.96 91.27 95.77 158.13 163.7 55 69.89 215.65 172.85 1973 493.45 508.9 517.1 764.37 657.69 431.97 358.79 177.36 298.07 189.1 247.06 496.55 428.37 1974 928.71 792.67 295.59 269.54 260.35 169.82 161.14 165.16 162.18 35.57 178.29 582.23 333.44 1975 670.56 669.19 580.41 426.94 609.2 437.59 263.96 226.03 159.68 76.25 43.55 56.13 351.62 1976 73.16 106.78 281.36 203.9 238.32 332.87 240.97 222.27 140.81 49.86 42.52 116.47 170.77 1977 199.69 231.02 383.96 366.6 173.3 119.55 104.97 125.19 126.94 33.42 50.41 117.73 169.4 1978 176.29 262.54 162.26 60.5 69.23 102.51 74 58.17 95.48 22.41 44.38 106.54 102.86 1979 448.03 683.05 666.27 696.6 482.94 488.8 168.07 133.91 191.32 62.62 86.17 252.93 363.39 1980 274.83 465.28 361.6 605.42 593.92 124.59 90.2 81.94 71.53 44.73 40.35 38.69 232.76 1981 40.27 65.17 64.76 44.86 70.35 147.54 182.9 193.66 45.69 41.98 43.66 51.23 82.67 1982 55.08 241.33 103.62 272.41 279.72 100.64 106.45 124.46 34.71 39.46 72.35 625.02 171.27 1983 671.39 697.41 507.15 271.03 397.74 328.01 220.2 129.02 66.77 39.06 56.37 412.56 316.39 1984 287.06 433.51 541.31 172.68 70.81 120.65 115.94 53.67 48.87 140.55 204.11 281.64 205.9 1985 216.57 325.39 501.03 210.21 149.93 121.84 113.81 78.08 64.47 92.77 160.21 305.98 195.02 1986 337.5 346.49 124.67 81.52 120.2 547.58 274.13 114.09 61.44 123.77 335.69 477.2 245.36 1987 508.7 263.44 548.53 289.68 109.24 220.21 200.72 134.11 52.75 42.24 111.55 389.81 239.25 1988 490.98 280.07 427.57 259.32 76.8 77.04 54.2 54.36 52.4 37 34.37 64.61 159.06 1989 294.35 434.97 379.68 439.99 686.04 743.13 1198.31 159.74 139.53 79.63 50.16 67.5 389.42 1990 311.11 532.16 450.15 521.32 567.44 431.95 165.7 163.15 55.52 51.28 49.26 83.12 281.85 1991 637.67 534.28 536.84 659.67 835.63 377.52 154.02 158.34 223.65 204.51 196.77 341.86 405.06 1992 406.63 534.31 709.75 336.23 116.45 166.51 165.28 185.96 115.61 48.42 114.92 272.07 264.35 1993 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 371.96 397.72 388.54 350 359.56 253.58 144.74 97.77 75.44 60.76 108.08 231.19 236.61 Std Dev 266.06 242.56 218.11 260.04 327.91 233.31 163.83 108.77 71.36 59.89 134.98 215.52 107.25