Country= U.S.A. Station= BLACK ROCK, ARK. River= BLACK RIVER Area= 19084.58 Lat= 36.1 Lon= -91.09 Source= USGS PointID= 7072500 Area Units= km2 Discharge Units= m3/sec Starting Year= 1929 Ending Year= 1980 Total Years= 52 Total Usable Years= 51 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1929 14959.6 21587.7 30270 41805.3 43224.5 37742.8 18917.6 8158.04 5256.58 6170.37 12682.2 12941.8 21143 1930 24693.3 27504.9 24961 15089.2 14770.5 10272.5 6087.24 3347.8 4067.26 3871.21 3612.31 5017.59 11941.2 1931 4309.67 6469.42 10489.2 16073.7 12915.3 9214.35 6055.27 5840.61 5710.59 5082.44 4734.6 17150.1 8670.44 1932 26816.2 37407.7 22086.3 23016.1 15644.7 9172.82 15280.2 7583.48 5219.77 5117.16 6430.79 8526.16 15191.8 1933 22481 23286.7 21829.7 32840.2 32266.8 26057.3 7644.68 6920.31 6444.01 4823.03 4325.89 6806.13 16310.5 1934 11081.1 5355.96 16405.6 19178.2 8777.36 5747.41 4974.66 4844.95 5208.44 5355.57 5693.6 9951.14 8547.83 1935 13585.8 18476.8 24239.3 37453.9 28655 34688.3 24977.4 11532.3 7070.76 3991.78 8015.6 10184.1 18572.6 1936 12657.7 10463.6 20127 31585.7 15523.2 7123.61 5239.56 3218.09 3635.9 7454.68 9636.28 7095.69 11146.8 1937 26826.2 56017.1 25947.5 14486 24892.5 15766.9 11381.6 6734.88 5946.57 4630.29 6855.55 6310.12 17149.6 1938 12002.8 21437 25351 31849.1 18547.6 24363 15822.8 13911.9 7611.61 7167.85 6136.29 6679.16 15906.7 1939 9815.04 28859.1 38401.5 32087.9 24190.9 12744.5 12415.6 7314.92 4080.48 2793.34 3161.12 3429.1 14941.1 1940 3725.97 7519.63 16113.3 17956.8 19706.8 10588.7 8840.38 6214.21 6286.37 3402.61 3918.13 7226.32 9291.6 1941 10135.7 10954.6 8707.93 14324.6 11978.1 13403.4 10091.8 5066 7143.44 14287.3 19378.3 9652.44 11260.3 1942 11145 17301.7 21872.6 27891.3 18229.8 16750.4 19420.9 10259 9801.46 8643.08 10690.6 14189.6 15516.3 1943 27789.9 18511.2 19048.2 27767.7 30572.3 36249.5 17166.5 9720.04 6044.74 4600.14 5653.02 4791.97 17326.3 1944 6653.58 9672.7 27168.8 34206.9 37288.9 18147.4 12908.9 7044.54 7622.94 7510.4 5577.51 8158.04 15163.4 1945 18721.2 12976.3 43809.1 50630.8 34126.6 31725.4 21338.2 9258.75 6920.67 15909.6 10802 13120.8 22444.9 1946 30248 26443 26403.3 21250 19988.2 21204.7 13756.6 9096.15 6159.89 6251.66 12897.5 13330.9 17252.5 1947 20543.5 17686 12132.5 27337.2 30050.7 27893.2 22952.3 7874.87 6220.3 4796.53 6802.69 8049.34 16028.3 1948 11582.6 16744.1 30911.2 35018.7 21778.5 9708.01 15842.9 12520.7 5587.89 4764.56 8306.32 16940.9 15808.9 1949 27645.6 40321.4 31340.5 27420.3 16177.2 17391.4 14696.5 8596.49 7475.69 9326.34 9116.19 13133.6 18553.4 1950 37345.6 49423.3 35019.9 27113.5 26980.6 20822.4 16696.1 16222.9 15703.7 9939.27 10302.7 19206.2 23731.3 1951 21251.4 27755.7 33971.3 31422.4 26271.8 18036 28892.5 15029.9 13747.9 9428.65 15149.6 25940.2 22241.4 1952 27838.3 30674.1 27761.6 35415.1 24851.4 13958.4 10300.1 7666.6 5846.52 4093.18 4229.62 8071.26 16725.5 1953 10101 15368 22713 22284.5 24423.9 14997.6 9727.35 7414.49 4855.42 3750.63 3917.19 4735.33 12024 1954 8844.95 10632 10387.8 11863.9 16288.7 10801 8669.57 6038.83 5644.52 7480.25 6947.1 6670.02 9189.05 1955 13582.1 13112.8 27839.3 27434.4 14845.4 12502.9 9109.85 6244.36 4421.23 6668.2 6250.51 6779.64 12399.2 1956 4121.49 23741.4 26775.1 20282.5 14825.3 10849.2 9211.25 8618.42 5899.38 4334.33 4481.64 7978.09 11759.8 1957 10256.2 27547.4 16903.4 26502.8 25212.2 30162.3 18734.9 9660.66 6788.53 6573.2 15185.5 22339.4 17988.9 1958 18482.8 15660.3 17383.9 22121.2 29231.4 14468.1 19258.3 22761.4 9136.95 7197.08 6894.25 8382.75 15914.9 1959 9815.95 23280.6 21455.2 18314.5 14799.7 12339.6 8505.15 7982.65 5754.02 13680.8 9861.87 14984.3 13397.9 1960 19945.2 18631.6 16723.5 27419.3 21268.8 16675.9 15477.5 7646.5 7344.49 5711.81 7007.51 7287.52 14261.6 1961 8689.67 8854.12 31623.7 31809.4 36310.6 21570 11343.2 11293.9 10151.6 10441.7 13868.7 19138.6 17924.6 1962 20096.8 28116.8 37797.7 37944.8 17538.3 14012.2 9643.31 7213.53 7335.99 7766.17 8089.22 7165.11 16893.3 1963 9049.56 8287.78 24002.8 23482.3 11885.8 10456.5 6925.79 6310.12 5016.83 4003.66 4172.98 5002.97 9883.09 1964 6200.51 8908.14 23582.6 27538.3 18860.9 9325.73 7926.02 5156.43 5357.58 5842.44 5636.97 12276.8 11384.4 1965 15629.2 19451.8 21731 32015.2 21203.9 14323.7 11747.9 7005.26 11037 13472.5 7857.02 7333.19 15234 1966 13932 17855.9 17508.1 14423.7 26862.8 12515.2 7115.79 6835.36 5834.25 5965.75 7457.75 13586.7 12491.1 1967 10088.2 11553.3 20622.1 19198 24280.5 16792 18042.5 10589.7 7075.47 7871.21 11247.5 19409.9 14730.9 1968 20268.6 21264.1 15908.7 26918.1 19283.9 23218.1 10991.6 10677.3 5846.52 7060.07 9341.78 13810.5 15382.4 1969 18239.8 34686.3 16238.4 27030.5 24849.5 14754.1 22081.8 11932.4 7472.86 10471.8 9348.39 9998.64 17258.7 1970 15642.9 18359.5 19720.5 25144.6 32524.4 18859.1 9736.48 8768.22 8254.41 13891.8 14694.6 12962.8 16546.6 1971 18320.2 19265.7 30109.2 15644.2 16921.7 13094.7 9658.84 9378.41 7700.34 6968.72 7941.98 16192.8 14266.4 1972 18943.2 15556.8 23283 22417.6 28433.9 10979.5 12676 11339.6 8635.74 10799.7 22768.8 29361.1 17932.9 1973 28831.3 30259.7 30889.3 49922.9 48687 30828.7 15396.2 11825.5 7941.97 15179.7 13624.2 28526.2 25992.7 1974 35332.3 36700.9 30432.6 29028.7 23090.2 32286.1 16557.2 9205.77 12873.8 7821.89 15002.3 17275.2 22133.9 1975 24983.8 28697.2 37506.3 42477.4 30839 18078.5 13017.6 8579.14 9742.94 11646.5 11192.8 14174 20911.3 1976 19197.1 17949.1 23750.7 18699.6 14745.8 11513.7 12070.3 7220.84 4998.89 6974.2 7547.42 7273.82 12661.8 1977 6902.95 6862.83 20356.3 21342.5 11491.2 6909.35 9637.83 8113.28 10407.4 13738.3 17284.7 24026.5 13089.4 1978 17843.4 17650.6 21970.3 31048.7 27781.7 16119 13260.6 10713 9547.55 7688.52 7992.94 24562.7 17181.6 1979 24541.7 19210.1 39095.7 45949.1 33784.9 20561.9 14093.7 15668.4 16334.2 13710 13952.7 19006.2 22992.4 1980 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 16896.8 20790.5 24327 27283.9 23287.9 17407.2 13182.7 8983.74 7376.93 7767.1 9091.7 12473.4 15739.1 Std Dev 8157.89 10656.2 7785.16 9032.63 8405.95 8007.59 5269.39 3434.33 2741.37 3446.36 4312.6 6508.43 4025.17