Results
| Country: | U.S.A.
| | Station: | GRAND COULEE, WASH. | | River: | COLUMBIA RIVER | | Area: | 193461.53 | | Lat: | 47.96 | | Lon: | -118.98 | | Source: | USGS | | PointID: | 12436500 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1923 | | Ending Year: | 1993 | | Total Years: | 71 | | Total Usable Years: | 64 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1923 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 7287.52 | 3849.28 | 2619.61 | 1364.61 | 930.12 | 801.46 | -9999 |
| 1924 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1925 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1926 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1927 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1928 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1929 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 1164.65 | 828.08 | 670.2 | -9999 |
| 1930 | 531.99 | 652.3 | 806.12 | 2011.64 | 4529.81 | 6296.76 | 5524.56 | 3523.73 | 2180.22 | 1275.82 | 923.42 | 757.8 | 2417.85 |
| 1931 | 639.69 | 687.19 | 907.7 | 1571.4 | 4477.74 | 6246.73 | 4701.54 | 2952 | 2205.61 | 1217.63 | 964.48 | 799.36 | 2280.92 |
| 1932 | 847.68 | 733.7 | 1593.52 | 3251.07 | 7201.65 | 9450.33 | 6701.08 | 3684.86 | 2231.29 | 1345.24 | 1364.22 | 1451.2 | 3321.32 |
| 1933 | 1206.76 | 871.15 | 1062.8 | 1944.06 | 5493.5 | 11104 | 9548.31 | 4720.72 | 2637.26 | 1792.01 | 2453.01 | 2787.12 | 3801.73 |
| 1934 | 3225.4 | 2256.06 | 2051.06 | 4773.3 | 8924.42 | 8827.35 | 4985.62 | 3317.84 | 2089.89 | 1279.2 | 1611.14 | 1444.44 | 3732.14 |
| 1935 | 1211.15 | 1421.31 | 1353.55 | 1906.68 | 5043.17 | 9119.02 | 7344.15 | 4107.06 | 2282.73 | 1338.85 | 944.94 | 775.79 | 3070.7 |
| 1936 | 752.87 | 607.84 | 895.82 | 2193.81 | 7327.71 | 8531.91 | 4837.64 | 3022.52 | 1867.41 | 1188.49 | 806.56 | 656.95 | 2724.13 |
| 1937 | 516.01 | 515.47 | 675.04 | 1247.55 | 3838.05 | 6902.74 | 5506.29 | 3101.44 | 1920.27 | 1205.48 | 1621.81 | 1329.99 | 2365.01 |
| 1938 | 1339.58 | 1050.76 | 1446.09 | 2825.94 | 6195.03 | 9767.48 | 6669.11 | 2861.57 | 2064.97 | 1548.57 | 1066.61 | 880.57 | 3143.02 |
| 1939 | 929.16 | 862.96 | 995.48 | 2441.3 | 6631.66 | 6657.33 | 5339.13 | 3119.71 | 1908.75 | 1362.78 | 1434.16 | 1260.47 | 2745.24 |
| 1940 | 988.08 | 1088.06 | 1430.19 | 2850.11 | 4311.49 | 6826.28 | 4729.85 | 2682.26 | 2157.09 | 1549.67 | 1373.09 | 1037.5 | 2585.31 |
| 1941 | 1050.38 | 1037.41 | 1355.47 | 2141.33 | 4114.1 | 4012.52 | 2630.19 | 2528.53 | 2361.45 | 2149.99 | 1955.1 | 2643.99 | 2331.71 |
| 1942 | 1664.58 | 1408.37 | 1336.29 | 2084.13 | 4067.33 | 7270.86 | 6254.4 | 3395.12 | 1883.46 | 1376.11 | 1180.63 | 1193.7 | 2759.58 |
| 1943 | 1099.43 | 1104.57 | 1058.05 | 3953.81 | 5530.95 | 8103.38 | 7680.3 | 3631.52 | 1762.54 | 1410.09 | 1273.04 | 1059.97 | 3138.97 |
| 1944 | 1299.39 | 1151.82 | 1081.98 | 906.8 | 2447.78 | 5456.69 | 3365.52 | 2600.6 | 1785.76 | 1583.1 | 1293.99 | 1183.56 | 2013.08 |
| 1945 | 1104.91 | 1088.89 | 1149.76 | 1262.94 | 4441.75 | 7899.5 | 5216.72 | 2620.6 | 1739.51 | 1171.23 | 1147.69 | 1123 | 2497.21 |
| 1946 | 1239.92 | 1121.25 | 1484.27 | 2930.43 | 8074.91 | 10124.3 | 6438.01 | 3302.4 | 2125.95 | 1327.15 | 1147.03 | 1584.84 | 3408.37 |
| 1947 | 1378.4 | 1553.59 | 1854.03 | 2744.48 | 7716.84 | 8917.02 | 5909.12 | 3114.6 | 1897.52 | 2447.59 | 2120.38 | 1498.97 | 3429.38 |
| 1948 | 1597.9 | 1519.55 | 1415.21 | 2066.76 | 7599.92 | 14967.4 | 6264.45 | 3711.35 | 2247.9 | 1603.2 | 1297.01 | 1211.97 | 3791.89 |
| 1949 | 1238.18 | 1204.79 | 1295.09 | 2835.38 | 7596.26 | 7213.28 | 3826.45 | 2508.43 | 1667.02 | 1294.09 | 1228.58 | 1452.39 | 2780 |
| 1950 | 1540.26 | 1591.92 | 1845.54 | 2604.31 | 5233.17 | 10407.4 | 10065.3 | 3790.82 | 2227.6 | 1754.01 | 1932.64 | 1976.8 | 3747.48 |
| 1951 | 2170.27 | 2456.9 | 2105.51 | 3145.83 | 7974.43 | 8677.27 | 7713.19 | 3667.69 | 1957.84 | 2102.03 | 1719.03 | 1725.88 | 3784.66 |
| 1952 | 1981.55 | 1796.47 | 2099.11 | 2090.08 | 7396.22 | 7268.97 | 5432.3 | 2817.54 | 1662.4 | 1480.16 | 1445.68 | 1356.75 | 3068.94 |
| 1953 | 1255.9 | 1817.14 | 2092.26 | 2127.55 | 3460.98 | 8727.3 | 6415.17 | 3162.92 | 2298.49 | 1939.62 | 1753.29 | 1547.11 | 3049.81 |
| 1954 | 1745.51 | 1590.71 | 1869.84 | 1654.47 | 6580.69 | 10139.4 | 9332.74 | 4651.3 | 3030.11 | 1858.6 | 1843.63 | 1820.69 | 3843.14 |
| 1955 | 1792.65 | 2030.53 | 2242.71 | 2025.14 | 2131.9 | 8229.86 | 8499.67 | 3785.52 | 2052.23 | 1761.68 | 1874.4 | 1764.79 | 3182.59 |
| 1956 | 1854.31 | 1863.55 | 1889.93 | 4992.29 | 7868.47 | 11310.8 | 6216.95 | 3198.09 | 2039.67 | 1818.04 | 1738.66 | 1541.36 | 3861.01 |
| 1957 | 2075 | 1833.93 | 1394.11 | 1966.99 | 7771.37 | 8194 | 4069.43 | 2624.44 | 1703.46 | 1677.55 | 1628.51 | 1494.59 | 3036.12 |
| 1958 | 1611.79 | 1776.39 | 2223.71 | 2409.3 | 5549.22 | 8458.29 | 4346.2 | 2476.92 | 1807.76 | 1759.31 | 1546.3 | 1665.13 | 2969.19 |
| 1959 | 2009.87 | 2123.77 | 2543.87 | 3114.11 | 5986.76 | 9532.45 | 7617.27 | 3513.77 | 3124.59 | 2960.59 | 2706.44 | 2192.65 | 3952.18 |
| 1960 | 2001.46 | 1900.07 | 1868.47 | 4166.37 | 4867.78 | 6961.26 | 6553.1 | 3208.68 | 1964.07 | 1767.16 | 1771.61 | 1529.76 | 3213.32 |
| 1961 | 1675.91 | 2393.19 | 2399.82 | 2886.92 | 5993.16 | 11904.5 | 5124.46 | 2723.46 | 1802.85 | 1702.86 | 1655.32 | 1469.83 | 3477.69 |
| 1962 | 1792.01 | 1999.18 | 1584.84 | 2999.53 | 4951.82 | 7016.01 | 5114.42 | 3270.8 | 1824.09 | 1731.36 | 1822.95 | 2072.07 | 3014.92 |
| 1963 | 2185.25 | 2223.79 | 1957.25 | 2695.97 | 3811.92 | 6907.46 | 5350.09 | 2912.45 | 1919.04 | 1582.55 | 1498.82 | 1456.13 | 2875.06 |
| 1964 | 1437.04 | 1911.59 | 1628.5 | 1653.15 | 4322.27 | 9654.21 | 7419.05 | 3345.24 | 1972.56 | 2265.45 | 1886.86 | 1842.34 | 3278.19 |
| 1965 | 2097.28 | 2782.95 | 2394.25 | 2947.42 | 6160.32 | 7832.48 | 5726.43 | 3481.16 | 2077.52 | 1766.16 | 1778.97 | 1912.59 | 3413.13 |
| 1966 | 1834.03 | 2119.93 | 2046.86 | 1880.44 | 4665.36 | 7083.97 | 5917.34 | 2894.45 | 1964.73 | 1824.62 | 1699.49 | 1946.38 | 2989.8 |
| 1967 | 1963.65 | 1999.89 | 2300.98 | 2416.1 | 3437.87 | 10542.4 | 7267.42 | 3207.59 | 2253.56 | 1933.5 | 1825.5 | 2301.81 | 3454.19 |
| 1968 | 1959.35 | 1833.57 | 2792.79 | 2646.79 | 3024.62 | 6599.37 | 5699.94 | 3017.22 | 2392.31 | 2002.29 | 2066.57 | 2438.55 | 3039.45 |
| 1969 | 2799.46 | 3133.88 | 2964.7 | 5120.66 | 5735.56 | 5872.95 | 5048.65 | 2812.15 | 2075.07 | 2200.96 | 2440.64 | 2579.22 | 3565.33 |
| 1970 | 2402.38 | 2069.67 | 2308.38 | 2516.25 | 3345.24 | 4384.42 | 3258.56 | 2747.94 | 2040.05 | 2136.84 | 2007.86 | 2120.03 | 2611.47 |
| 1971 | 1969.68 | 2618.51 | 3719.58 | 3320.92 | 6720.26 | 7310.5 | 5316.29 | 3515.69 | 2064.4 | 1976.8 | 2227.51 | 2763.01 | 3626.93 |
| 1972 | 2609.91 | 2897.12 | 4052.07 | 4104.93 | 5573.88 | 8787.71 | 5707.25 | 3972.51 | 2581.09 | 2108.34 | 2258 | 2834.62 | 3957.29 |
| 1973 | 2528.25 | 2657.04 | 2719.07 | 2743.54 | 1862.07 | 2137.65 | 2859.65 | 2869.33 | 2081.11 | 2047.14 | 1806.53 | 2548.53 | 2404.99 |
| 1974 | 4044.95 | 3941.12 | 3093.4 | 3944.56 | 4917.11 | 5860.67 | 5196.63 | 3580.82 | 2997.35 | 2531.08 | 2665.95 | 2713.77 | 3790.62 |
| 1975 | 2890.53 | 3302.98 | 3915.97 | 3431.08 | 4166.25 | 3553.69 | 2864.31 | 2712.04 | 1901.68 | 2157.21 | 2696.53 | 2746.66 | 3028.24 |
| 1976 | 3244.22 | 3939.97 | 3863.9 | 3658.18 | 4510.62 | 4080.48 | 4715.24 | 5199.37 | 3446.56 | 2974.65 | 2682.09 | 2731.4 | 3753.89 |
| 1977 | 3088.11 | 2648.85 | 2668.47 | 1827.11 | 2469.79 | 1999.09 | 2016.44 | 2209.82 | 2231.85 | 1818.96 | 2213.35 | 2118.48 | 2275.86 |
| 1978 | 2820.65 | 2858.2 | 2541.31 | 3696.31 | 3743.87 | 2705.5 | 3189.41 | 2561.5 | 3013.68 | 2732.32 | 2905.42 | 2765.75 | 2961.16 |
| 1979 | 3367.9 | 3067.84 | 2593.56 | 2805.65 | 3130.95 | 2556.27 | 2522.22 | 2533.28 | 2098.29 | 2218.96 | 2820.56 | 2576.21 | 2690.97 |
| 1980 | 2983.24 | 2655.74 | 2208 | 1890.07 | 3009 | 4174.87 | 2976.12 | 2547.89 | 1912.91 | 1929.39 | 2296.41 | 3060.52 | 2637.01 |
| 1981 | 4140.68 | 3575.73 | 2724.55 | 2494.92 | 3499.62 | 6000.37 | 4876 | 3844.72 | 2250.82 | 2273.22 | 2288.11 | 2617.5 | 3382.19 |
| 1982 | 3219.09 | 3380.04 | 5245.95 | 4280.59 | 4495.1 | 4526.94 | 4683.27 | 3383.79 | 2267.06 | 2104.68 | 2661.23 | 2438.92 | 3557.22 |
| 1983 | 3043.9 | 3962.86 | 5173.79 | 3980.43 | 3707.7 | 3063.43 | 3515.78 | 3297.01 | 2194 | 2020.46 | 2375.99 | 3229.14 | 3297.04 |
| 1984 | 2947.98 | 3693.81 | 2969.45 | 3635.71 | 3618.36 | 3181.6 | 3146.2 | 2877.83 | 1919.7 | 2122.77 | 2055.91 | 2712.77 | 2906.84 |
| 1985 | 3940.17 | 3890.55 | 2997.77 | 2375.42 | 3135.24 | 2402.13 | 2006.21 | 1774.11 | 1755.09 | 2327.75 | 3048.7 | 3416.04 | 2755.77 |
| 1986 | 2199.32 | 2629.94 | 3138.25 | 3756.16 | 3246.5 | 2982.35 | 3078.33 | 2652.02 | 1998.43 | 2107.06 | 2472.55 | 2734.51 | 2749.62 |
| 1987 | 3352.64 | 2585.34 | 2021.65 | 2324.73 | 3395.76 | 2877.57 | 2201.97 | 2293.95 | 2142.84 | 2517.11 | 2199.76 | 2854.26 | 2563.97 |
| 1988 | 3093.31 | 2696.17 | 2377.17 | 1828.24 | 2640.33 | 2484.16 | 2070.16 | 2181.78 | 2359.09 | 2201.69 | 2618.09 | 3384.79 | 2494.58 |
| 1989 | 3284.68 | 2866.19 | 1913.13 | 2188.15 | 3649.88 | 2450.36 | 1809.27 | 1712.81 | 1846.74 | 2127.06 | 2588.83 | 2772.51 | 2434.13 |
| 1990 | 3201.28 | 3585.34 | 3606.03 | 3382.65 | 3466.73 | 4975.3 | 3649.42 | 2949.08 | 1956.99 | -9999 | -9999 | -9999 | -9999 |
| 1991 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 2400.55 | 2484.72 | 2545.7 | -9999 |
| 1992 | 2875.82 | 2191.25 | 2624.89 | 2248.09 | 3173.88 | 3729.16 | 2280.43 | 2314.05 | 2068.65 | 1864.99 | 2318.6 | 3111.31 | 2566.76 |
| 1993 | 2848.14 | 2432.63 | 1526.74 | 1371.39 | 3369.08 | 2709.56 | 2753.6 | 2015.71 | 1920.65 | -9999 | -9999 | -9999 | -9999 |
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| Avg | 2091.12 | 2115.29 | 2182.47 | 2718.91 | 4878.34 | 6729.35 | 5099.72 | 3104.15 | 2138.05 | 1852.86 | 1863.95 | 1953.69 | 3075.41 |
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| Std Dev | 912.94 |
929.92 |
968.98 |
928.06 |
1735.83 |
2881.96 |
1960.98 |
656.89 |
361.24 |
434.39 |
577.64 |
755.29 |
501.51 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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