Grand Coulee Daily Inflow in Thousands of CFS for Water Year 2026 Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 01 73.0 71.2 84.4 104.3 --- --- --- --- --- --- --- --- 02 69.5 66.4 82.4 108.7 --- --- --- --- --- --- --- --- 03 71.2 79.9 91.7 122.7 --- --- --- --- --- --- --- --- 04 61.9 77.6 94.7 124.4 --- --- --- --- --- --- --- --- 05 66.8 70.7 85.9 130.5 --- --- --- --- --- --- --- --- 06 65.2 83.5 85.8 --- --- --- --- --- --- --- --- --- 07 66.5 80.1 90.1 --- --- --- --- --- --- --- --- --- 08 65.9 78.2 83.2 --- --- --- --- --- --- --- --- --- 09 68.3 79.6 93.6 --- --- --- --- --- --- --- --- --- 10 67.1 78.1 89.7 --- --- --- --- --- --- --- --- --- 11 62.1 75.2 82.8 --- --- --- --- --- --- --- --- --- 12 76.4 77.1 81.3 --- --- --- --- --- --- --- --- --- 13 70.5 70.9 86.1 --- --- --- --- --- --- --- --- --- 14 73.1 73.4 97.8 --- --- --- --- --- --- --- --- --- 15 66.0 76.7 91.0 --- --- --- --- --- --- --- --- --- 16 68.1 78.5 109.5 --- --- --- --- --- --- --- --- --- 17 70.8 82.3 117.0 --- --- --- --- --- --- --- --- --- 18 71.3 89.6 118.5 --- --- --- --- --- --- --- --- --- 19 67.9 92.0 125.4 --- --- --- --- --- --- --- --- --- 20 68.2 84.2 121.0 --- --- --- --- --- --- --- --- --- 21 70.4 88.2 114.8 --- --- --- --- --- --- --- --- --- 22 72.5 88.7 118.6 --- --- --- --- --- --- --- --- --- 23 75.6 77.2 120.6 --- --- --- --- --- --- --- --- --- 24 68.3 82.6 109.1 --- --- --- --- --- --- --- --- --- 25 71.0 79.3 101.4 --- --- --- --- --- --- --- --- --- 26 71.8 75.5 107.5 --- --- --- --- --- --- --- --- --- 27 74.4 78.1 120.6 --- --- --- --- --- --- --- --- --- 28 75.3 73.8 130.7 --- --- --- --- --- --- --- --- --- 29 64.5 79.9 118.0 --- --- --- --- --- --- --- --- 30 71.9 82.8 113.1 --- --- --- --- --- --- --- --- 31 71.4 107.8 --- --- --- --- --- --- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ VOL 4278 4703 6296 1171