Northwest River Forecast Center
Water Supply Seasonal Forecasts
Ensemble Date: 2021-08-01 Issued Date: 2021-08-01
Water Year 2021
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SILVIES - NEAR BURNS APR-AUG 20.8 24 20.8 24 20.8 24 88 37 20.76
APR-JUL 20.6 24 20.6 24 20.6 24 87 36 20.75
APR-SEP 20.8 23 21.1 23 20.8 23 90 37 20.76
JAN-JUL 33.6 25 33.6 25 33.6 25 134 56 33.64
JAN-SEP 33.8 24 34.0 24 33.8 24 143 57 33.65
OCT-SEP 37.5 26 37.7 26 37.4 26 144
DONNER UND BLITZEN - NR FRENCHGLEN APR-AUG 35.6 55 35.7 55 35.6 55 65 44 34.12 55
APR-JUL 34.0 55 34.0 55 34.0 55 62 42 34.05
APR-SEP 37.2 55 37.4 55 37.1 55 68 46 34.12 55
JAN-JUL 42.9 52 42.9 52 42.9 52 82 53 42.93
JAN-SEP 46.1 53 46.3 53 46.0 53 87 57 43.00 52
OCT-SEP 52.3 54 52.5 55 52.2 54 96
DUNGENESS - NEAR SEQUIM APR-AUG 127.6 94 131.6 97 127.2 94 136 117 114.98 95
APR-JUL 114.5 95 114.5 95 114.5 95 120 107 114.53
APR-SEP 136.3 94 145.4 100 134.8 93 145 126 114.98 95
JAN-JUL 175.6 91 175.6 91 175.6 91 192 177 175.73
JAN-SEP 197.5 91 206.5 96 195.9 91 216 196 176.18 91
OCT-SEP 248.0 88 257.0 91 246.5 88 281
SKAGIT - NEAR CONCRETE APR-AUG 5671.7 103 5711.4 103 5637.5 102 5519 6250 5211.03 105
APR-JUL 5184.6 106 5184.6 106 5184.6 106 4914 5745 5189.82
APR-SEP 6027.1 102 6219.6 105 5955.1 100 5934 6714 5211.03 105
JAN-JUL 7387.3 103 7387.3 103 7387.3 103 7181 8489 7396.51
JAN-SEP 8229.8 100 8422.3 103 8157.8 99 8201 9458 7417.72 103
OCT-SEP 11245.5 105 11438.0 107 11173.6 104 10715
COLUMBIA - MICA DAM APR-AUG 11823.1 108 11973.9 109 11728.5 107 10972 12318 10251.03 115
APR-JUL 10172.6 116 10172.6 116 10172.6 116 8750 10124 10173.21
APR-SEP 12658.9 105 13053.7 108 12434.7 103 12090 13513 10251.03 115
JAN-JUL 11108.4 117 11108.4 117 11108.4 117 9514 11013 11101.11
JAN-SEP 13594.7 106 13989.5 109 13370.5 104 12855 14402 11178.93 116
OCT-SEP 15330.3 108 15725.1 111 15106.1 106 14206
COLUMBIA - REVELSTOKE DAM APR-AUG 16418.6 106 16687.1 108 16327.5 105 15509 17549 14384.52 112
APR-JUL 14281.8 113 14281.8 113 14281.8 113 12632 14669 14282.30
APR-SEP 17581.2 104 18261.1 108 17323.4 102 16985 19138 14384.52 112
JAN-JUL 15580.2 114 15580.2 114 15580.2 114 13671 15851 15576.40
JAN-SEP 18879.7 105 19559.5 109 18621.9 103 18023 20320 15678.62 113
OCT-SEP 21598.8 108 22278.7 111 21341.0 107 19998
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)APR-AUG 22116.9 101 22451.2 102 22014.2 100 21975 24097 19566.10 105
APR-JUL 19461.0 106 19461.0 106 19461.0 106 18338 20556 19566.10
APR-SEP 23615.2 99 24539.4 102 23310.9 97 23944 26029 19566.10 105
JAN-JUL 21549.2 106 21549.2 106 21549.2 106 20381 22409 21668.40
JAN-SEP 25703.4 99 26627.5 102 25399.0 98 25987 27882 21668.40 105
OCT-SEP 29395.8 101 30320.0 104 29091.5 100 29149
KOOTENAI - LIBBY DAM APR-AUG 4759.0 81 4766.0 81 4757.1 81 5885 6320 4472.89 83
APR-JUL 4460.5 83 4460.5 83 4460.5 83 5342 5838 4462.21
APR-SEP 4971.4 79 5108.5 82 4943.0 79 6254 6604 4472.89 83
JAN-JUL 4941.0 82 4941.0 82 4941.0 82 6002 6389 4942.14
JAN-SEP 5451.9 79 5589.0 81 5423.4 78 6914 7155 4952.82 82
OCT-SEP 6224.0 80 6361.1 81 6195.5 79 7806
KOOTENAI - AT LEONIA APR-AUG 5609.7 78 5616.8 78 5607.6 78 7200 7363 5289.03 79
APR-JUL 5274.9 80 5274.9 80 5274.9 80 6616 6859 5277.50
APR-SEP 5856.4 77 5996.3 79 5827.3 77 7610 7671 5289.03 79
JAN-JUL 6008.5 79 6008.5 79 6008.5 79 7619 7597 6010.95
JAN-SEP 6590.1 77 6730.0 78 6561.0 76 8612 8410 6022.48 79
OCT-SEP 7501.4 77 7641.3 79 7472.3 77 9712
MOYIE - AT EASTPORT APR-AUG 261.4 68 261.7 69 261.4 68 382 422 257.79 69
APR-JUL 257.5 69 257.5 69 257.5 69 374 416 257.65
APR-SEP 265.1 68 265.9 69 264.7 68 387 424 257.79 69
JAN-JUL 283.3 68 283.3 68 283.3 68 418 458 283.40
JAN-SEP 290.9 68 291.8 68 290.6 68 428 466 283.54 68
OCT-SEP 308.8 67 309.6 67 308.4 67 461
KOOTENAI - AT BONNERS FERRY APR-AUG 6105.6 78 6112.8 78 6103.2 78 7837 8222 5776.58 79
APR-JUL 5761.6 80 5761.6 80 5761.6 80 7240 7695 5764.39
APR-SEP 6358.9 77 6499.6 79 6329.3 77 8256 8548 5776.58 79
JAN-JUL 6508.6 78 6508.6 78 6508.6 78 8317 8518 6511.38
JAN-SEP 7105.9 76 7246.6 78 7076.3 76 9333 9371 6523.57 78
OCT-SEP 8096.7 77 8237.4 79 8067.1 77 10488
DUNCAN - DUNCAN DAM APR-AUG 2091.2 104 2116.3 105 2074.9 103 2008 2158 1816.37 108
APR-JUL 1807.0 109 1807.0 109 1807.0 109 1662 1812 1804.95
APR-SEP 2239.2 102 2280.4 104 2200.4 101 2189 2339 1816.37 108
JAN-JUL 1962.0 109 1962.0 109 1962.0 109 1799 1980 1957.44
JAN-SEP 2394.2 103 2435.3 105 2355.4 101 2325 2507 1968.86 108
OCT-SEP 2694.8 105 2735.9 106 2656.0 103 2575
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
KOOTENAI - KOOTENAY L AT QUEENS BAY APR-AUG 12064.3 82 12120.1 82 12053.2 82 14778 15341 11251.28 83
APR-JUL 11208.7 83 11208.7 83 11208.7 83 13474 14177 11213.71
APR-SEP 12624.6 81 12867.9 83 12589.9 81 15590 16023 11251.28 83
JAN-JUL 12636.8 82 12636.8 82 12636.8 82 15355 15725 12642.20
JAN-SEP 14052.8 80 14296.0 82 14018.0 80 17471 17571 12679.77 82
OCT-SEP 15903.0 81 16146.3 83 15868.3 81 19539
SLOCAN - NEAR CRESCENT VALLEY APR-AUG 1500.3 83 1541.7 85 1500.3 83 1814 1953 1423.14 85
APR-JUL 1419.2 85 1419.2 85 1419.2 85 1660 1818 1419.75
APR-SEP 1559.1 82 1661.0 87 1547.2 81 1905 2019 1423.14 85
JAN-JUL 1582.8 86 1582.8 86 1582.8 86 1838 1992 1583.26
JAN-SEP 1722.7 83 1824.5 88 1710.8 82 2082 2194 1586.65 86
OCT-SEP 1956.4 84 2058.3 88 1944.5 84 2327
COLUMBIA - AT BIRCHBANK APR-AUG 36473.4 94 36821.6 95 36357.3 93 38910 42787 32985.44 97
APR-JUL 32859.1 97 32859.1 97 32859.1 97 33840 37795 32829.46
APR-SEP 38641.1 93 39776.6 95 38242.2 92 41747 45637 32985.44 97
JAN-JUL 36694.6 97 36694.6 97 36694.6 97 37905 41694 36681.47
JAN-SEP 42476.6 93 43612.1 95 42077.7 92 45812 49536 36837.45 96
OCT-SEP 48650.7 95 49786.2 97 48251.8 94 51215
BLACKFOOT - NEAR BONNER APR-AUG 848.6 111 849.4 111 848.4 111 764 1030 807.39 112
APR-JUL 805.2 112 805.2 112 805.2 112 720 979 805.84
APR-SEP 885.9 111 888.4 111 884.7 110 801 1068 807.39 112
JAN-JUL 942.5 112 942.5 112 942.5 112 838 1095 942.89
JAN-SEP 1023.2 111 1025.7 112 1022.1 111 919 1184 944.44 112
OCT-SEP 1179.3 115 1181.9 115 1178.2 115 1028
CLARK FORK - ABOVE BLACKFOOT APR-AUG 572.1 100 577.3 101 570.4 100 573 933 540.89 101
APR-JUL 538.9 101 538.9 101 538.9 101 531 874 539.54
APR-SEP 609.4 99 623.7 101 602.6 98 617 987 540.89 101
JAN-JUL 750.2 109 750.2 109 750.2 109 689 1035 750.70
JAN-SEP 820.8 106 835.1 108 814.0 105 774 1148 752.05 109
OCT-SEP 1034.6 111 1048.9 113 1027.8 111 929
CLARK FORK - ABOVE MISSOULA APR-AUG 1420.6 106 1426.5 107 1418.7 106 1337 1963 1348.26 107
APR-JUL 1344.0 107 1344.0 107 1344.0 107 1251 1853 1345.37
APR-SEP 1495.0 105 1511.8 107 1487.6 105 1418 2055 1348.26 107
JAN-JUL 1692.7 111 1692.7 111 1692.7 111 1527 2129 1693.58
JAN-SEP 1843.8 109 1860.5 110 1836.3 108 1694 2332 1696.47 111
OCT-SEP 2213.8 113 2230.5 114 2206.3 113 1957
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
BITTERROOT - NEAR DARBY APR-AUG 468.1 104 470.4 105 466.8 104 450 672 435.32 103
APR-JUL 434.1 103 434.1 103 434.1 103 420 633 434.44
APR-SEP 494.1 104 497.7 105 491.8 104 473 697 435.32 103
JAN-JUL 493.6 105 493.6 105 493.6 105 471 682 493.76
JAN-SEP 553.5 106 557.2 106 551.3 105 524 746 494.64 105
OCT-SEP 623.8 109 627.4 109 621.5 108 573
BITTERROOT - NEAR MISSOULA APR-AUG 1099.0 93 1101.4 93 1097.9 93 1185 1496 1054.12 94
APR-JUL 1052.2 93 1052.2 93 1052.2 93 1131 1444 1052.87
APR-SEP 1145.1 92 1152.2 93 1142.5 92 1238 1541 1054.12 94
JAN-JUL 1238.7 94 1238.7 94 1238.7 94 1315 1588 1239.17
JAN-SEP 1331.6 95 1338.7 95 1329.0 94 1407 1684 1240.42 95
OCT-SEP 1601.9 101 1609.0 101 1599.2 101 1590
CLARK FORK - BELOW MISSOULA APR-AUG 2466.7 97 2475.5 98 2463.6 97 2535 3457 2349.28 98
APR-JUL 2343.3 98 2343.3 98 2343.3 98 2397 3297 2345.20
APR-SEP 2587.4 97 2609.9 98 2577.2 97 2668 3590 2349.28 98
JAN-JUL 2837.8 99 2837.8 99 2837.8 99 2860 3720 2839.17
JAN-SEP 3081.9 98 3104.4 99 3071.7 98 3131 4013 2843.25 99
OCT-SEP 3704.0 103 3726.5 104 3693.8 103 3580
CLARK FORK - AT ST REGIS APR-AUG 3094.0 92 3103.3 93 3091.0 92 3345 4207 2943.67 93
APR-JUL 2935.7 93 2935.7 93 2935.7 93 3162 3996 2938.30
APR-SEP 3244.3 92 3268.3 93 3233.6 92 3514 4377 2943.67 93
JAN-JUL 3579.1 94 3579.1 94 3579.1 94 3807 4546 3580.79
JAN-SEP 3887.7 93 3911.8 94 3877.0 93 4158 4927 3586.16 94
OCT-SEP 4677.7 99 4701.8 99 4667.0 98 4747
NF FLATHEAD - NEAR COLUMBIA FALLS APR-AUG 1232.0 76 1232.0 76 1232.0 76 1631 1644 1178.85 76
APR-JUL 1176.3 77 1176.3 77 1176.3 77 1536 1573 1176.74
APR-SEP 1273.7 75 1277.2 75 1273.7 75 1696 1684 1178.85 76
JAN-JUL 1302.7 77 1302.7 77 1302.7 77 1697 1686 1303.09
JAN-SEP 1400.1 75 1403.7 76 1400.1 75 1857 1797 1305.20 77
OCT-SEP 1574.5 76 1578.1 76 1574.5 76 2065
MF FLATHEAD - NEAR WEST GLACIER APR-AUG 1354.9 86 1354.9 86 1354.9 86 1578 1781 1299.80 86
APR-JUL 1297.1 86 1297.1 86 1297.1 86 1500 1709 1297.68
APR-SEP 1394.7 86 1403.2 86 1394.7 86 1631 1815 1299.80 86
JAN-JUL 1435.5 87 1435.5 87 1435.5 87 1653 1814 1435.92
JAN-SEP 1533.1 86 1541.5 86 1533.1 86 1784 1920 1438.04 87
OCT-SEP 1780.1 90 1788.5 90 1780.1 90 1985
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SF FLATHEAD - HUNGRY HORSE DAM APR-AUG 1852.6 96 1854.8 96 1852.5 96 1936 2338 1807.65 96
APR-JUL 1805.2 96 1805.2 96 1805.2 96 1871 2277 1805.98
APR-SEP 1891.8 95 1905.2 96 1889.4 95 1988 2373 1807.65 96
JAN-JUL 2055.1 98 2055.1 98 2055.1 98 2098 2488 2056.01
JAN-SEP 2141.6 97 2155.0 97 2139.3 97 2215 2585 2057.68 98
OCT-SEP 2424.5 99 2437.9 100 2422.2 99 2447
FLATHEAD - AT COLUMBIA FALLS APR-AUG 4504.3 85 4506.5 86 4504.2 85 5270 5865 4338.81 86
APR-JUL 4330.1 86 4330.1 86 4330.1 86 5021 5633 4332.03
APR-SEP 4632.8 85 4658.5 85 4630.3 85 5450 5992 4338.81 86
JAN-JUL 4859.9 87 4859.9 87 4859.9 87 5592 6072 4861.78
JAN-SEP 5162.6 86 5188.3 86 5160.1 86 6021 6432 4868.56 87
OCT-SEP 5900.3 88 5926.0 89 5897.9 88 6693
FLATHEAD - SELI’Š KSANKA QLISPE’ DAMAPR-AUG 5052.6 83 5057.8 83 5051.6 83 6076 6725 4890.36 84
APR-JUL 4881.8 84 4881.8 84 4881.8 84 5807 6496 4883.95
APR-SEP 5186.3 83 5226.7 83 5180.2 83 6270 6844 4890.36 84
JAN-JUL 5594.3 85 5594.3 85 5594.3 85 6575 7154 5593.74
JAN-SEP 5898.9 84 5939.2 84 5892.8 84 7037 7502 5600.15 85
OCT-SEP 6806.8 87 6847.1 88 6800.6 87 7825
CLARK FORK - NEAR PLAINS APR-AUG 8296.8 86 8313.0 86 8291.9 86 9691 11288 7931.42 86
APR-JUL 7913.4 86 7913.4 86 7913.4 86 9208 10809 7918.32
APR-SEP 8621.0 86 8690.5 86 8600.8 85 10078 11617 7931.42 86
JAN-JUL 9272.5 87 9272.5 87 9272.5 87 10716 12004 9273.66
JAN-SEP 9980.1 86 10049.5 87 9959.8 86 11586 12812 9286.76 86
OCT-SEP 11713.1 90 11782.6 90 11692.9 90 13044
CLARK FORK - CABINET GORGE DAM APR-AUG 9073.4 83 9091.5 83 9068.1 83 10945 12187 8636.22 83
APR-JUL 8618.3 83 8618.3 83 8618.3 83 10391 11711 8624.12
APR-SEP 9456.2 83 9531.5 84 9433.9 83 11376 12504 8636.22 83
JAN-JUL 10089.1 82 10089.1 82 10089.1 82 12242 12999 10088.97
JAN-SEP 10927.0 83 11002.3 83 10904.7 82 13226 13793 10101.07 82
OCT-SEP 12696.0 85 12771.3 86 12673.6 85 14871
PRIEST - NEAR PRIEST RIVER APR-AUG 421.5 52 426.3 53 420.2 52 809 848 412.05 53
APR-JUL 411.5 53 411.5 53 411.5 53 782 829 412.11
APR-SEP 436.0 52 444.2 53 431.4 52 831 861 412.05 53
JAN-JUL 555.1 55 555.1 55 555.1 55 1002 1016 555.38
JAN-SEP 579.6 55 587.9 56 574.9 55 1051 1048 555.32 55
OCT-SEP 673.9 57 682.1 57 669.2 56 1188
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
PEND OREILLE - ALBENI FALLS DAM APR-AUG 10047.8 81 10074.1 82 10037.9 81 12354 13936 9620.14 81
APR-JUL 9601.3 82 9601.3 82 9601.3 82 11777 13397 9599.10
APR-SEP 10437.2 81 10525.9 82 10408.0 81 12815 14319 9620.14 81
JAN-JUL 11408.7 80 11408.7 80 11408.7 80 14189 15399 11404.82
JAN-SEP 12244.6 80 12333.3 81 12215.4 80 15226 16321 11425.86 80
OCT-SEP 14284.8 83 14373.6 83 14255.6 83 17218
COLUMBIA - AT INTL BOUNDARY APR-AUG 47057.5 90 47401.0 90 46935.8 89 52448 57412 43066.32 91
APR-JUL 42913.9 92 42913.9 92 42913.9 92 46746 51868 42883.56
APR-SEP 49647.5 89 50795.1 91 49272.1 88 55784 60653 43066.32 91
JAN-JUL 48890.0 91 48890.0 91 48890.0 91 53529 58001 48873.04
JAN-SEP 55623.6 89 56771.2 91 55248.2 88 62567 66786 49055.80 91
OCT-SEP 64061.2 91 65208.8 93 63685.9 91 70237
KETTLE - AT LAURIER APR-AUG 1375.1 75 1380.8 75 1373.7 74 1845 2410 1361.05 76
APR-JUL 1359.6 76 1359.6 76 1359.6 76 1795 2374 1360.42
APR-SEP 1392.5 74 1422.2 76 1385.8 74 1875 2425 1361.05 76
JAN-JUL 1480.3 76 1480.3 76 1480.3 76 1954 2538 1480.51
JAN-SEP 1513.2 74 1542.9 76 1506.5 74 2034 2589 1481.14 76
OCT-SEP 1593.6 74 1623.3 75 1586.8 74 2152
NF COEUR D ALENE - AT ENAVILLE APR-AUG 458.1 63 458.3 63 458.0 63 723 739 444.59 63
APR-JUL 443.0 63 443.0 63 443.0 63 701 720 444.11
APR-SEP 471.7 64 472.2 64 471.5 64 739 754 444.59 63
JAN-JUL 702.0 63 702.0 63 702.0 63 1110 975 702.30
JAN-SEP 730.6 64 731.2 64 730.5 64 1147 1008 702.78 63
OCT-SEP 831.1 64 831.6 64 830.9 64 1308
ST JOE - AT CALDER APR-AUG 842.1 77 842.6 77 841.9 77 1093 1130 818.08 77
APR-JUL 816.3 77 816.3 77 816.3 77 1055 1096 817.10
APR-SEP 862.5 77 864.9 77 861.6 77 1120 1153 818.08 77
JAN-JUL 1027.9 74 1027.9 74 1027.9 74 1380 1272 1028.34
JAN-SEP 1074.1 74 1076.5 74 1073.3 74 1446 1329 1029.32 74
OCT-SEP 1215.8 76 1218.2 76 1215.0 76 1608
COEUR D ALENE - COEUR D ALENE LAKE APR-AUG 1645.4 68 1646.1 68 1645.2 68 2430 2425 1615.60 68
APR-JUL 1611.1 68 1611.1 68 1611.1 68 2383 2394 1614.33
APR-SEP 1676.0 68 1679.1 68 1675.1 68 2468 2447 1615.60 68
JAN-JUL 2562.7 69 2562.7 69 2562.7 69 3735 3313 2563.46
JAN-SEP 2627.6 69 2630.7 69 2626.8 69 3821 3366 2564.73 69
OCT-SEP 2996.4 69 2999.5 69 2995.6 69 4339
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SPOKANE - AT SPOKANE APR-AUG 1676.0 68 1677.0 68 1675.7 68 2480 2456 1631.04 68
APR-JUL 1626.2 67 1626.2 67 1626.2 67 2410 2403 1629.38
APR-SEP 1716.8 68 1720.3 68 1715.6 68 2530 2488 1631.04 68
JAN-JUL 2621.4 70 2621.4 70 2621.4 70 3770 3397 2622.34
JAN-SEP 2712.0 70 2715.5 70 2710.8 70 3890 3483 2624.00 70
OCT-SEP 3126.8 71 3130.3 71 3125.6 71 4431
SPOKANE - AT LONGLAKE APR-AUG 1791.5 64 1792.5 65 1791.3 64 2778 2677 1711.15 64
APR-JUL 1705.1 64 1705.1 64 1705.1 64 2669 2588 1708.14
APR-SEP 1868.4 65 1871.9 65 1867.1 65 2866 2744 1711.15 64
JAN-JUL 2868.3 67 2868.3 67 2868.3 67 4310 3739 2869.27
JAN-SEP 3031.7 67 3035.2 67 3030.4 67 4505 3895 2872.28 67
OCT-SEP 3538.4 68 3541.9 68 3537.2 68 5188
COLUMBIA - GRAND COULEE DAM APR-AUG 49983.0 88 50327.6 89 49859.6 88 56763 62386 45945.99 89
APR-JUL 45774.7 90 45774.7 90 45774.7 90 51015 56791 45762.45
APR-SEP 52675.6 88 53830.7 90 52304.4 87 60110 65564 45945.99 89
JAN-JUL 53026.1 89 53026.1 89 53026.1 89 59599 64366 53043.42
JAN-SEP 59927.0 87 61082.1 89 59555.8 87 68694 73139 53226.96 89
OCT-SEP 68712.8 89 69868.0 91 68341.6 89 76824
SIMILKAMEEN - NEAR HEDLEY APR-AUG 1005.0 108 1008.2 108 1003.5 108 933 1185 991.00 110
APR-JUL 990.0 110 990.0 110 990.0 110 903 1161 990.34
APR-SEP 1018.6 107 1026.9 108 1013.7 106 953 1202 991.00 110
JAN-JUL 1090.9 108 1090.9 108 1090.9 108 1013 1268 1091.04
JAN-SEP 1119.4 105 1127.7 106 1114.5 105 1064 1309 1091.70 108
OCT-SEP 1213.2 102 1221.6 103 1208.3 102 1186
SIMILKAMEEN - NEAR NIGHTHAWK APR-AUG 1337.8 107 1341.0 107 1336.5 107 1252 1792 1324.67 110
APR-JUL 1323.2 110 1323.2 110 1323.2 110 1198 1747 1323.70
APR-SEP 1360.0 106 1369.7 107 1355.0 106 1283 1817 1324.67 110
JAN-JUL 1479.3 110 1479.3 110 1479.3 110 1341 1910 1479.80
JAN-SEP 1516.1 106 1525.8 107 1511.1 106 1426 1980 1480.77 110
OCT-SEP 1732.2 109 1741.9 110 1727.2 109 1584
OKANOGAN - NEAR TONASKET APR-AUG 1466.2 97 1470.7 97 1464.9 97 1516 2322 1435.39 101
APR-JUL 1433.0 101 1433.0 101 1433.0 101 1419 2197 1433.68
APR-SEP 1506.1 95 1533.7 97 1499.0 95 1583 2383 1435.39 101
JAN-JUL 1689.5 101 1689.5 101 1689.5 101 1668 2536 1690.18
JAN-SEP 1762.6 96 1790.3 98 1755.5 96 1832 2722 1691.89 101
OCT-SEP 2085.4 101 2113.1 102 2078.3 100 2070
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
METHOW - NEAR PATEROS APR-AUG 887.4 102 887.8 102 887.3 102 872 868 865.89 104
APR-JUL 864.5 104 864.5 104 864.5 104 833 844 864.99
APR-SEP 906.9 101 908.0 101 906.5 101 895 884 865.89 104
JAN-JUL 965.6 105 965.6 105 965.6 105 923 933 965.91
JAN-SEP 1008.0 102 1009.1 102 1007.6 102 985 973 966.81 104
OCT-SEP 1131.2 105 1132.3 105 1130.7 105 1075
STEHEKIN - AT STEHEKIN APR-AUG 819.9 109 821.4 109 819.5 109 753 721 766.49 112
APR-JUL 763.3 112 763.3 112 763.3 112 682 667 763.59
APR-SEP 846.8 107 851.0 108 845.1 107 791 756 766.49 112
JAN-JUL 838.6 108 838.6 108 838.6 108 776 773 838.90
JAN-SEP 922.2 104 926.4 105 920.5 104 885 862 841.80 108
OCT-SEP 1102.9 110 1107.1 110 1101.2 110 1005
CHELAN - LAKE CHELAN DAM APR-AUG 1131.5 105 1133.0 105 1131.1 105 1080 1011 1072.18 107
APR-JUL 1070.7 107 1070.7 107 1070.7 107 1000 958 1070.76
APR-SEP 1158.5 104 1167.7 105 1156.7 104 1116 1050 1072.18 107
JAN-JUL 1235.1 105 1235.1 105 1235.1 105 1178 1140 1235.01
JAN-SEP 1322.9 102 1332.1 103 1321.1 102 1294 1232 1236.43 105
OCT-SEP 1569.5 107 1578.7 108 1567.7 107 1464
WENATCHEE - AT PESHASTIN APR-AUG 1514.9 105 1514.9 105 1514.9 105 1446 1410 1469.11 107
APR-JUL 1466.1 107 1466.1 107 1466.1 107 1368 1352 1467.01
APR-SEP 1547.3 104 1552.7 104 1547.3 104 1489 1451 1469.11 107
JAN-JUL 1752.8 103 1752.8 103 1752.8 103 1700 1748 1753.59
JAN-SEP 1834.1 101 1839.4 101 1834.0 101 1821 1846 1755.69 103
OCT-SEP 2222.8 105 2228.2 105 2222.8 105 2125
COLUMBIA - BLO ROCK ISLAND DAM APR-AUG 54941.6 89 55286.8 90 54816.9 89 61742 67315 50765.39 90
APR-JUL 50564.3 91 50564.3 91 50564.3 91 55772 61502 50560.13
APR-SEP 57776.6 89 58938.5 90 57400.8 88 65202 70647 50765.39 90
JAN-JUL 58668.3 90 58668.3 90 58668.3 90 65319 69752 58693.86
JAN-SEP 65880.6 88 67042.5 90 65504.8 88 74749 78898 58899.12 90
OCT-SEP 75658.9 91 76820.8 92 75283.1 90 83588
COLUMBIA - BLO PRIEST RAPIDS DAM APR-AUG 55499.0 88 55844.1 88 55374.4 88 63174 68445 51294.15 89
APR-JUL 51092.4 90 51092.4 90 51092.4 90 57020 62624 51088.05
APR-SEP 58342.4 87 59504.2 89 57966.4 87 66778 71756 51294.15 89
JAN-JUL 59334.1 88 59334.1 88 59334.1 88 67248 71181 59357.15
JAN-SEP 66584.1 86 67745.9 88 66208.2 86 77006 80313 59563.25 88
OCT-SEP 76667.5 89 77829.3 90 76291.5 88 86367
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
YAKIMA - NEAR MARTIN APR-AUG 142.6 118 143.0 118 142.5 118 121 130 139.67 120
APR-JUL 139.2 120 139.2 120 139.2 120 116 121 139.23
APR-SEP 145.9 116 150.2 119 145.1 115 126 134 139.67 120
JAN-JUL 188.8 109 188.8 109 188.8 109 173 213 188.91
JAN-SEP 195.5 107 199.8 109 194.7 106 183 227 189.35 110
OCT-SEP 271.4 113 275.7 115 270.6 113 240
KACHESS - NEAR EASTON APR-AUG 123.2 114 123.3 114 123.0 114 108 101 121.47 116
APR-JUL 121.2 117 121.2 117 121.2 117 104 99 121.26
APR-SEP 125.0 111 127.8 113 124.8 110 113 109 121.47 116
JAN-JUL 167.7 107 167.7 107 167.7 107 157 184 167.86
JAN-SEP 171.4 104 174.2 106 171.2 104 165 194 168.07 107
OCT-SEP 226.8 108 229.7 109 226.6 107 211
CLE ELUM - NEAR ROSLYN APR-AUG 465.2 115 465.3 115 465.2 115 406 408 448.28 116
APR-JUL 448.6 117 448.6 117 448.6 117 384 384 447.19
APR-SEP 470.6 113 480.2 115 470.5 113 417 423 448.28 116
JAN-JUL 556.3 110 556.3 110 556.3 110 504 571 554.83
JAN-SEP 578.3 108 587.9 109 578.2 108 537 610 555.92 110
OCT-SEP 720.9 111 730.5 112 720.8 111 652
YAKIMA - NEAR HORLICK APR-AUG 1026.6 112 1027.4 112 1026.3 112 920 852 993.11
APR-JUL 992.1 113 992.1 113 992.1 113 879 821 991.47
APR-SEP 1066.2 110 1085.1 112 1064.9 110 966 895 993.11
JAN-JUL 1382.8 107 1382.8 107 1382.8 107 1293 1450 1381.95
JAN-SEP 1456.9 106 1475.7 107 1455.5 105 1380 1523 1383.59
OCT-SEP 1846.1 107 1865.0 108 1844.8 107 1720
BUMPING - BELOW BUMPING DAM APR-AUG 121.8 102 122.0 102 121.8 102 120 124 117.91 103
APR-JUL 117.6 103 117.6 103 117.6 103 114 120 117.70
APR-SEP 125.3 101 126.2 102 125.3 101 124 127 117.91 103
JAN-JUL 152.2 98 152.2 98 152.2 98 155 167 152.28
JAN-SEP 159.9 97 160.8 97 159.9 97 165 173 152.49 98
OCT-SEP 191.4 96 192.3 97 191.4 96 199
TIETON - AT TIETON DAM APR-AUG 199.1 97 200.3 98 197.2 96 205 186 179.76 96
APR-JUL 178.9 96 178.9 96 178.9 96 187 170 179.13
APR-SEP 213.4 97 217.3 99 210.9 96 220 203 179.76 96
JAN-JUL 244.4 93 244.4 93 244.4 93 263 254 244.46
JAN-SEP 278.9 94 282.8 96 276.4 93 296 287 245.09 93
OCT-SEP 338.6 95 342.5 96 336.1 94 356
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
NACHES - NEAR NACHES APR-AUG 791.1 105 793.4 106 789.6 105 752 704 759.33 106
APR-JUL 757.5 106 757.5 106 757.5 106 715 676 758.15
APR-SEP 817.2 104 826.6 105 814.3 104 784 727 759.33 106
JAN-JUL 962.2 97 962.2 97 962.2 97 989 1038 962.55
JAN-SEP 1022.0 97 1031.3 97 1019.0 96 1058 1089 963.73 97
OCT-SEP 1165.8 95 1175.2 95 1162.9 94 1233
YAKIMA - NEAR PARKER APR-AUG 1887.5 107 1890.9 107 1886.1 107 1767 1623 1798.14 106
APR-JUL 1794.5 106 1794.5 106 1794.5 106 1686 1547 1794.77
APR-SEP 1997.5 107 2025.8 109 1993.1 107 1864 1720 1798.14 106
JAN-JUL 2500.8 99 2500.8 99 2500.8 99 2531 2622 2500.62
JAN-SEP 2703.8 100 2732.1 101 2699.5 100 2709 2794 2503.99 99
OCT-SEP 3335.6 101 3363.9 102 3331.3 101 3290
YAKIMA - AT KIONA APR-AUG 866.1 92 867.6 92 864.8 92 944 704 761.56 89
APR-JUL 756.1 89 756.1 89 756.1 89 852 598 757.70
APR-SEP 953.7 91 961.8 92 951.8 91 1050 851 761.56 89
JAN-JUL 1366.2 82 1366.2 82 1366.2 82 1660 1362 1367.08
JAN-SEP 1563.8 84 1571.9 85 1561.9 84 1858 1615 1370.94 82
OCT-SEP 2001.3 85 2009.3 85 1999.3 85 2364
SNAKE - JACKSON LAKE AT DAM APR-AUG 492.7 61 493.4 61 492.3 61 811 725 463.90 60
APR-JUL 461.7 60 461.7 60 461.7 60 765 704 461.96
APR-SEP 516.9 61 519.7 62 515.5 61 845 736 463.90 60
JAN-JUL 535.2 62 535.2 62 535.2 62 861 806 535.51
JAN-SEP 590.3 63 593.2 63 589.0 63 940 837 537.45 62
OCT-SEP 646.6 63 649.4 63 645.2 62 1033
GREYS - AB RES NR ALPINE APR-AUG 223.0 66 223.5 67 222.8 66 336 362 204.74 66
APR-JUL 203.9 66 203.9 66 203.9 66 307 332 204.01
APR-SEP 238.5 67 240.4 67 237.9 66 358 384 204.74 66
JAN-JUL 243.7 70 243.7 70 243.7 70 346 373 243.84
JAN-SEP 278.4 70 280.3 71 277.7 70 396 426 244.57 70
OCT-SEP 330.4 74 332.4 75 329.8 74 444
SALT - ABV PALISADES RES NR ETNA APR-AUG 170.9 51 173.2 52 169.8 51 335 392 149.09 49
APR-JUL 148.0 49 148.0 49 148.0 49 301 358 148.28
APR-SEP 196.6 53 201.2 54 193.2 52 370 427 149.09 49
JAN-JUL 226.4 60 226.4 60 226.4 60 379 446 226.65
JAN-SEP 275.0 61 279.6 62 271.6 61 448 514 227.46 60
OCT-SEP 374.0 69 378.5 69 370.6 68 545
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SNAKE - NEAR IRWIN APR-AUG 2187.1 67 2191.8 67 2183.6 66 3285 3518 2010.60 66
APR-JUL 2000.1 66 2000.1 66 2000.1 66 3011 3278 2001.35
APR-SEP 2363.1 67 2379.9 68 2353.2 67 3501 3711 2010.60 66
JAN-JUL 2471.4 71 2471.4 71 2471.4 71 3487 3773 2472.63
JAN-SEP 2834.4 71 2851.2 72 2824.5 71 3977 4206 2481.88 71
OCT-SEP 3330.9 73 3347.8 74 3321.1 73 4534
SNAKE - NEAR HEISE APR-AUG 2348.7 66 2353.4 66 2345.2 66 3541 3745 2148.65 66
APR-JUL 2137.3 66 2137.3 66 2137.3 66 3237 3453 2138.81
APR-SEP 2545.6 67 2562.8 68 2535.4 67 3785 3980 2148.65 66
JAN-JUL 2686.0 71 2686.0 71 2686.0 71 3790 4042 2687.63
JAN-SEP 3094.3 71 3111.5 72 3084.2 71 4338 4569 2697.47 71
OCT-SEP 3677.7 74 3694.9 74 3667.6 74 4982
FALL RIVER - NEAR CHESTER APR-AUG 226.5 65 227.7 65 224.5 64 351 331 212.22 64
APR-JUL 211.2 64 211.2 64 211.2 64 331 306 211.44
APR-SEP 242.5 65 249.4 67 239.4 64 375 352 212.22 64
JAN-JUL 294.3 71 294.3 71 294.3 71 416 391 294.49
JAN-SEP 325.5 71 332.5 72 322.4 70 460 437 295.27 71
OCT-SEP 411.3 74 418.3 76 408.2 74 554
HENRYS FORK - AT ST. ANTHONY APR-AUG 481.3 63 486.9 64 474.5 63 759 631 407.83 60
APR-JUL 404.6 60 404.6 60 404.6 60 672 568 405.31
APR-SEP 546.4 65 559.1 67 536.9 64 836 688 407.83 60
JAN-JUL 693.2 72 693.2 72 693.2 72 964 885 693.98
JAN-SEP 835.0 74 847.7 75 825.5 73 1128 1005 696.50 72
OCT-SEP 1074.1 76 1086.8 77 1064.6 76 1407
TETON - NEAR ST. ANTHONY APR-AUG 288.0 69 289.6 69 286.9 68 419 404 251.24 67
APR-JUL 249.9 67 249.9 67 249.9 67 373 363 250.12
APR-SEP 321.9 70 326.3 71 319.2 70 457 434 251.24 67
JAN-JUL 316.2 70 316.2 70 316.2 70 451 435 316.36
JAN-SEP 388.2 73 392.6 73 385.5 72 535 507 317.48 70
OCT-SEP 466.3 75 470.6 75 463.6 74 624
HENRYS FORK - AT REXBURG APR-AUG 961.2 60 967.1 60 958.1 60 1607 1364 845.72 60
APR-JUL 842.6 60 842.6 60 842.6 60 1403 1200 840.88
APR-SEP 1066.5 60 1078.3 60 1056.6 59 1785 1474 845.72 60
JAN-JUL 1181.2 65 1181.2 65 1181.2 65 1824 1553 1179.30
JAN-SEP 1405.1 64 1416.9 64 1395.2 63 2206 1827 1184.14 64
OCT-SEP 1710.5 64 1722.3 64 1700.6 64 2678
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
WILLOW CREEK - NEAR RIRIE APR-AUG 19.2 29 19.3 29 19.2 29 67 59 19.11 29
APR-JUL 19.1 29 19.1 29 19.1 29 66 58 19.06
APR-SEP 19.3 28 19.7 29 19.1 28 69 62 19.11 29
JAN-JUL 26.8 35 26.8 35 26.8 35 77 69 26.91
JAN-SEP 27.1 34 27.5 34 26.9 34 80 73 26.96 35
OCT-SEP 34.6 39 35.0 40 34.4 39 88
SNAKE - NEAR SHELLEY APR-AUG 2794.9 60 2809.9 61 2782.5 60 4643 4543 2486.53 59
APR-JUL 2469.3 59 2469.3 59 2469.3 59 4165 4209 2471.72
APR-SEP 3086.4 61 3114.6 62 3061.7 61 5051 4858 2486.53 59
JAN-JUL 3365.1 68 3365.1 68 3365.1 68 4917 5206 3367.41
JAN-SEP 3982.2 69 4010.4 69 3957.5 68 5803 5855 3382.22 68
OCT-SEP 4847.2 71 4875.5 72 4822.6 71 6787
PORTNEUF - AT TOPAZ APR-AUG 50.5 68 50.8 69 50.3 68 74 71 43.47 67
APR-JUL 43.1 67 43.1 67 43.1 67 64 59 43.19
APR-SEP 57.0 70 57.6 71 56.5 70 81 81 43.47 67
JAN-JUL 66.0 71 66.0 71 66.0 71 93 88 66.03
JAN-SEP 79.9 73 80.5 73 79.3 72 110 111 66.31 71
OCT-SEP 104.1 78 104.8 78 103.6 77 134
SNAKE - AT AMERICAN FALLS DAM APR-AUG 620.5 23 636.8 24 607.5 23 2696 2445 906.30 34
APR-JUL 634.2 24 634.2 24 634.2 24 2650 2549 908.26
APR-SEP 701.2 25 730.2 26 674.6 24 2806 2471 906.30 34
JAN-JUL 1670.7 43 1670.7 43 1670.7 43 3841 3616 1946.81
JAN-SEP 1737.7 43 1766.7 44 1711.1 43 3997 3538 1944.85 51
OCT-SEP 2705.2 52 2734.2 53 2678.7 52 5195
SALMON FALLS CREEK - NR SAN JACINTO APR-AUG 21.2 30 21.3 30 21.2 30 72 59 21.27 30
APR-JUL 21.2 30 21.2 30 21.2 30 70 58 21.22
APR-SEP 22.2 30 23.0 31 21.7 29 74 61 21.27 30
JAN-JUL 32.8 36 32.8 36 32.8 36 90 78 32.83
JAN-SEP 33.9 36 34.6 37 33.3 35 94 81 32.88 36
OCT-SEP 42.8 41 43.6 42 42.3 41 104
BIG LOST - AT HOWELL RANCH NEAR CHILLY APR-AUG 52.9 31 53.3 31 52.8 31 172 84 47.93 30
APR-JUL 47.6 30 47.6 30 47.6 30 159 78 47.59
APR-SEP 56.9 32 57.5 32 56.6 31 180 89 47.93 30
JAN-JUL 61.2 35 61.2 35 61.2 35 174 95 61.28
JAN-SEP 70.5 36 71.2 37 70.2 36 194 106 61.62 35
OCT-SEP 83.3 39 83.9 39 83.0 39 213
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
BIG LOST - MACKAY RESERVOIR NEAR MACKAY APR-AUG 41.0 30 41.5 30 40.9 30 138 73 34.82 28
APR-JUL 34.5 28 34.5 28 34.5 28 124 59 34.51
APR-SEP 46.7 31 47.5 31 46.3 31 151 84 34.82 28
JAN-JUL 63.0 41 63.0 41 63.0 41 155 98 63.00
JAN-SEP 75.2 41 76.0 42 74.8 41 182 123 63.31 41
OCT-SEP 107.8 49 108.6 49 107.4 49 220
BIG WOOD - AT HAILEY APR-AUG 86.4 34 86.8 35 86.3 34 251 113 79.23 34
APR-JUL 78.8 34 78.8 34 78.8 34 235 105 78.84
APR-SEP 93.4 36 94.5 36 93.0 35 263 119 79.23 34
JAN-JUL 101.6 38 101.6 38 101.6 38 266 136 101.66
JAN-SEP 116.2 40 117.3 40 115.9 39 294 150 102.05 38
OCT-SEP 141.0 43 142.1 43 140.6 43 327
BIG WOOD - MAGIC DAM APR-AUG 31.7 12 32.1 12 31.7 12 258 53 29.39 12
APR-JUL 29.3 12 29.3 12 29.3 12 250 49 29.29
APR-SEP 33.8 13 35.8 14 33.3 13 264 58 29.39 12
JAN-JUL 43.4 15 43.4 15 43.4 15 292 79 43.27
JAN-SEP 47.9 16 49.9 16 47.4 15 306 87 43.37 15
OCT-SEP 59.0 18 61.0 18 58.5 18 330
LITTLE WOOD - NEAR CAREY APR-AUG 21.4 26 21.8 27 21.4 26 81 33 19.39 25
APR-JUL 19.3 25 19.3 25 19.3 25 77 31 19.29
APR-SEP 22.9 28 24.0 29 22.5 27 83 34 19.39 25
JAN-JUL 30.1 32 30.1 32 30.1 32 94 44 30.15
JAN-SEP 33.8 34 34.9 35 33.4 33 100 47 30.25 32
OCT-SEP 40.3 37 41.4 38 39.9 36 110
SNAKE - AT KING HILL APR-AUG 2251.3 72 2293.5 74 2226.5 72 3106 2982 1855.79 70
APR-JUL 1838.3 70 1838.3 70 1838.3 70 2617 2503 1841.79
APR-SEP 2683.4 74 2803.2 77 2629.6 73 3627 3479 1855.79 70
JAN-JUL 2983.2 67 2983.2 67 2983.2 67 4465 3837 2986.50
JAN-SEP 3828.3 70 3948.2 72 3774.5 69 5474 4813 3000.50 67
OCT-SEP 5097.0 70 5216.9 71 5043.2 69 7298
BRUNEAU - NEAR HOT SPRINGS APR-AUG 65.4 35 66.0 35 65.3 35 188 167 64.67 35
APR-JUL 64.5 35 64.5 35 64.5 35 183 163 64.59
APR-SEP 66.7 35 67.6 35 66.2 34 192 169 64.67 35
JAN-JUL 86.9 38 86.9 38 86.9 38 226 199 86.93
JAN-SEP 89.1 38 90.1 38 88.6 38 234 205 87.01 39
OCT-SEP 101.9 40 102.8 41 101.4 40 252
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SNAKE - BELOW SWAN FALLS APR-AUG 1928.8 64 1964.1 65 1907.7 63 3035 2702 1575.05 60
APR-JUL 1561.2 60 1561.2 60 1561.2 60 2609 2319 1564.23
APR-SEP 2377.3 68 2485.7 71 2329.1 66 3514 3145 1575.05 60
JAN-JUL 2733.0 60 2733.0 60 2733.0 60 4560 3675 2736.37
JAN-SEP 3549.0 65 3657.4 67 3500.9 64 5464 4502 2747.19 60
OCT-SEP 4907.0 67 5015.4 69 4858.9 66 7312
OWYHEE - OWYHEE DAM APR-AUG 105.2 27 106.7 27 104.9 27 390 198 97.35 26
APR-JUL 97.0 26 97.0 26 97.0 26 375 180 96.83
APR-SEP 112.9 28 116.5 29 111.0 27 405 213 97.35 26
JAN-JUL 189.7 28 189.7 28 189.7 28 677 328 189.41
JAN-SEP 205.6 29 209.3 30 203.7 29 707 361 189.93 28
OCT-SEP 254.8 33 258.5 33 252.9 33 775
SF BOISE - ANDERSON RANCH DAM APR-AUG 243.3 49 244.5 49 243.2 49 496 296 229.72 48
APR-JUL 228.5 48 228.5 48 228.5 48 477 280 228.83
APR-SEP 257.1 50 259.0 51 256.0 50 510 308 229.72 48
JAN-JUL 291.6 52 291.6 52 291.6 52 562 343 291.79
JAN-SEP 320.1 54 322.0 54 319.1 54 595 370 292.68 52
OCT-SEP 365.5 56 367.4 57 364.5 56 649
BOISE - LUCKY PEAK DAM APR-AUG 702.8 53 705.0 54 702.5 53 1316 883 664.69 53
APR-JUL 661.5 52 661.5 52 661.5 52 1261 838 662.62
APR-SEP 739.7 54 744.3 55 737.3 54 1361 923 664.69 53
JAN-JUL 877.6 55 877.6 55 877.6 55 1592 1056 878.22
JAN-SEP 955.8 56 960.4 57 953.4 56 1692 1141 880.29 55
OCT-SEP 1123.3 60 1128.0 60 1120.9 60 1866
BOISE - NEAR PARMA APR-AUG 175.4 33 177.8 34 173.9 33 530 207 151.05 31
APR-JUL 149.1 31 149.1 31 149.1 31 481 169 149.40
APR-SEP 232.7 40 235.8 40 229.7 39 588 255 151.05 31
JAN-JUL 291.5 36 291.5 36 291.5 36 803 309 291.88
JAN-SEP 375.0 41 378.1 42 372.0 41 910 395 293.53 36
OCT-SEP 531.9 48 535.0 49 528.8 48 1098
MALHEUR - NEAR DREWSEY APR-AUG 25.2 37 25.4 37 25.2 37 69 40 25.32 37
APR-JUL 25.2 37 25.2 37 25.2 37 68 40 25.31
APR-SEP 25.5 36 26.1 37 25.3 36 70 41 25.32 37
JAN-JUL 44.0 35 44.0 35 44.0 35 125 69 44.08
JAN-SEP 44.3 35 44.9 36 44.2 35 126 70 44.09 35
OCT-SEP 54.2 39 54.8 39 54.0 39 139
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
NF MALHEUR - AT BEULAH APR-AUG 30.4 51 30.5 51 30.3 50 60 39 28.76 51
APR-JUL 28.6 50 28.6 50 28.6 50 57 37 28.66
APR-SEP 32.2 52 32.4 52 32.0 52 62 42 28.76 51
JAN-JUL 45.2 50 45.2 50 45.2 50 90 55 45.26
JAN-SEP 48.8 51 49.0 51 48.6 51 96 60 45.36 50
OCT-SEP 58.3 54 58.5 54 58.1 54 108
DEADWOOD - BELOW DEADWOOD RES APR-AUG 79.6 62 80.0 62 79.5 62 128 102 77.51 63
APR-JUL 77.1 63 77.1 63 77.1 63 123 98 77.51
APR-SEP 81.9 58 82.9 58 81.6 57 142 106 77.51 63
JAN-JUL 93.4 67 93.4 67 93.4 67 140 112 93.64
JAN-SEP 98.2 66 99.1 67 97.9 66 148 119 93.64 67
OCT-SEP 111.5 68 112.5 69 111.2 68 163
NF PAYETTE - CASCADE DAM APR-AUG 246.4 52 251.7 54 245.3 52 470 450 235.62 51
APR-JUL 234.6 51 234.6 51 234.6 51 461 446 235.58
APR-SEP 257.8 53 270.4 55 254.0 52 489 464 235.62 51
JAN-JUL 304.7 54 304.7 54 304.7 54 569 516 305.69
JAN-SEP 327.9 55 340.5 57 324.1 54 597 534 305.73 54
OCT-SEP 385.6 56 398.1 58 381.8 56 684
PAYETTE - NEAR HORSESHOE BEND APR-AUG 880.0 57 888.6 58 878.5 57 1544 1329 839.13 56
APR-JUL 836.7 56 836.7 56 836.7 56 1485 1277 837.64
APR-SEP 922.3 57 940.8 59 916.6 57 1606 1384 839.13 56
JAN-JUL 1083.0 59 1083.0 59 1083.0 59 1849 1510 1083.51
JAN-SEP 1168.7 59 1187.2 60 1163.0 59 1970 1617 1085.00 59
OCT-SEP 1368.2 62 1386.7 63 1362.5 62 2215
PAYETTE - NEAR EMMETT APR-AUG 608.5 49 611.7 49 608.1 49 1248 1057 526.45 45
APR-JUL 522.5 45 522.5 45 522.5 45 1151 945 523.45
APR-SEP 677.8 52 682.9 52 675.8 52 1311 1109 526.45 45
JAN-JUL 772.3 49 772.3 49 772.3 49 1578 1167 772.83
JAN-SEP 927.5 53 932.6 54 925.5 53 1738 1332 775.83 49
OCT-SEP 1096.8 56 1101.9 56 1094.8 56 1967
WEISER - NEAR WEISER APR-AUG 210.9 54 211.3 55 210.8 54 387 278 197.58 53
APR-JUL 196.4 53 196.4 53 196.4 53 371 263 197.14
APR-SEP 221.2 56 222.3 56 220.9 55 398 287 197.58 53
JAN-JUL 386.8 58 386.8 58 386.8 58 663 394 386.96
JAN-SEP 411.7 60 412.8 60 411.3 60 691 419 387.40 58
OCT-SEP 440.3 59 441.4 59 440.0 59 752
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SNAKE - AT WEISER APR-AUG 3043.3 54 3084.2 55 3016.8 54 5633 4468 2519.37 50
APR-JUL 2496.8 50 2496.8 50 2496.8 50 5010 3913 2502.44
APR-SEP 3714.3 59 3847.2 61 3660.7 58 6335 5090 2519.37 50
JAN-JUL 4456.1 53 4456.1 53 4456.1 53 8404 5976 4461.13
JAN-SEP 5673.6 58 5806.5 60 5619.9 58 9729 7153 4478.06 53
OCT-SEP 7607.3 62 7740.2 63 7553.6 61 12310
BURNT - NR HEREFORD APR-AUG 24.0 71 24.5 72 23.9 70 34 33 23.94 72
APR-JUL 23.7 72 23.7 72 23.7 72 33 31 23.84
APR-SEP 24.7 71 25.4 73 24.4 70 35 34 23.94 72
JAN-JUL 38.0 69 38.0 69 38.0 69 55 48 38.16
JAN-SEP 39.1 70 39.8 71 38.8 69 56 51 38.26 70
OCT-SEP 45.3 72 46.0 73 45.0 71 63
EAGLE CREEK - ABOVE SKULL CK APR-AUG 138.6 81 138.6 81 138.6 81 172 158 132.86 81
APR-JUL 132.5 81 132.5 81 132.5 81 163 150 132.60
APR-SEP 143.4 81 143.5 81 143.4 81 178 164 132.86 81
JAN-JUL 149.4 78 149.4 78 149.4 78 191 169 149.41
JAN-SEP 160.3 78 160.4 78 160.3 78 205 183 149.67 78
OCT-SEP 175.6 78 175.7 78 175.5 78 224
SNAKE - BROWNLEE DAM APR-AUG 3335.6 54 3376.0 55 3309.6 54 6121 4919 2789.52 51
APR-JUL 2769.9 51 2769.9 51 2769.9 51 5474 4342 2772.80
APR-SEP 4033.7 59 4167.3 61 3982.2 58 6853 5569 2789.52 51
JAN-JUL 4952.6 54 4952.6 54 4952.6 54 9124 6640 4954.46
JAN-SEP 6216.4 59 6350.0 60 6164.9 59 10503 7867 4971.18 54
OCT-SEP 8220.2 63 8353.8 64 8168.7 62 13142
SNAKE - AT HELLS CANYON DAM APR-AUG 3403.7 53 3444.1 54 3377.7 53 6411 5052 2860.05 49
APR-JUL 2838.0 49 2838.0 49 2838.0 49 5759 4480 2842.72
APR-SEP 4101.8 57 4235.4 59 4050.3 57 7148 5698 2860.05 49
JAN-JUL 5122.9 54 5122.9 54 5122.9 54 9555 6780 5128.14
JAN-SEP 6386.8 58 6520.3 60 6335.2 58 10944 7998 5145.47 54
OCT-SEP 8408.0 62 8541.5 63 8356.5 61 13628
IMNAHA - AT IMNAHA APR-AUG 160.8 60 160.8 60 160.8 60 269 230 153.71 60
APR-JUL 153.2 60 153.2 60 153.2 60 257 220 153.42
APR-SEP 167.5 60 167.5 60 167.4 60 278 237 153.71 60
JAN-JUL 190.1 61 190.1 61 190.1 61 314 260 190.18
JAN-SEP 204.4 61 204.4 61 204.3 61 335 277 190.47 61
OCT-SEP 230.4 63 230.4 63 230.3 63 366
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SALMON - AT SALMON APR-AUG 400.4 48 403.8 48 399.4 47 843 698 369.28 47
APR-JUL 367.5 47 367.5 47 367.5 47 777 645 368.01
APR-SEP 433.2 48 443.9 49 429.3 48 901 746 369.28 47
JAN-JUL 553.1 57 553.1 57 553.1 57 973 836 553.62
JAN-SEP 618.7 56 629.4 57 614.9 56 1097 937 554.89 57
OCT-SEP 824.8 63 835.5 63 820.9 62 1317
SALMON - AT WHITEBIRD APR-AUG 3595.6 63 3600.7 63 3594.6 63 5686 6346 3387.91 63
APR-JUL 3378.1 63 3378.1 63 3378.1 63 5369 6030 3381.09
APR-SEP 3801.5 64 3816.2 64 3795.3 64 5935 6589 3387.91 63
JAN-JUL 4133.6 66 4133.6 66 4133.6 66 6267 6836 4135.50
JAN-SEP 4556.9 67 4571.7 67 4550.8 67 6833 7395 4142.32 66
OCT-SEP 5337.6 69 5352.4 70 5331.5 69 7683
GRANDE RONDE - NEAR PERRY APR-AUG 114.5 63 115.1 64 114.4 63 181 214 114.23 64
APR-JUL 113.7 64 113.7 64 113.7 64 179 212 114.21
APR-SEP 115.7 63 116.8 64 115.3 63 183 216 114.23 64
JAN-JUL 178.4 63 178.4 63 178.4 63 284 323 178.52
JAN-SEP 180.5 63 181.6 63 180.1 63 288 326 178.54 63
OCT-SEP 190.4 62 191.6 63 190.0 62 306
LOSTINE - NR LOSTINE APR-AUG 84.8 76 85.1 76 84.7 76 112 120 83.24 80
APR-JUL 83.1 78 83.1 78 83.1 78 107 115 83.12
APR-SEP 85.9 75 89.1 77 85.4 74 115 122 83.24 80
JAN-JUL 89.3 76 89.3 76 89.3 76 117 122 89.38
JAN-SEP 92.1 76 95.4 78 91.7 75 122 129 89.50
OCT-SEP 99.2 76 102.5 79 98.8 76 130
GRANDE RONDE - TROY APR-AUG 985.6 78 987.1 78 985.4 78 1269 1478 964.71 79
APR-JUL 961.2 79 961.2 79 961.2 79 1223 1434 963.75
APR-SEP 1008.2 77 1013.0 77 1006.3 77 1310 1518 964.71 79
JAN-JUL 1432.8 79 1432.8 79 1432.8 79 1812 2053 1433.46
JAN-SEP 1479.8 78 1484.6 78 1478.0 78 1899 2136 1434.42 79
OCT-SEP 1678.4 79 1683.1 80 1676.5 79 2113
SNAKE - LOWER GRANITE DAM APR-AUG 13998.6 66 14041.3 67 13968.1 66 21091 20767 13100.94 66
APR-JUL 13043.7 66 13043.7 66 13043.7 66 19848 19702 13063.35
APR-SEP 15037.9 67 15188.5 68 14975.3 67 22279 21893 13100.94 66
JAN-JUL 18321.0 67 18321.0 67 18321.0 67 27440 25173 18329.85
JAN-SEP 20315.2 68 20465.8 69 20252.5 68 29872 27363 18367.44 67
OCT-SEP 24412.4 70 24562.9 71 24349.7 70 34667
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
CLEARWATER - AT OROFINO APR-AUG 3877.8 87 3881.5 88 3876.5 87 4436 5148 3794.84 88
APR-JUL 3787.2 88 3787.2 88 3787.2 88 4307 5018 3791.26
APR-SEP 3952.6 87 3968.7 87 3945.0 87 4538 5240 3794.84 88
JAN-JUL 4642.2 87 4642.2 87 4642.2 87 5318 5866 4643.85
JAN-SEP 4807.6 87 4823.7 87 4800.1 87 5549 6088 4647.43 87
OCT-SEP 5445.9 89 5462.0 90 5438.4 89 6088
NF CLEARWATER - DWORSHAK DAM APR-AUG 2006.3 80 2010.2 80 2004.9 80 2509 2416 1951.72 81
APR-JUL 1948.5 81 1948.5 81 1948.5 81 2419 2357 1950.46
APR-SEP 2054.5 80 2068.8 80 2050.2 80 2575 2466 1951.72 81
JAN-JUL 2631.8 80 2631.8 80 2631.8 80 3289 2869 2632.60
JAN-SEP 2737.8 79 2752.0 80 2733.4 79 3445 2978 2633.86 80
OCT-SEP 3167.8 81 3182.1 82 3163.5 81 3891
CLEARWATER - AT SPALDING APR-AUG 6092.5 86 6100.9 86 6089.8 86 7111 7822 5943.57 86
APR-JUL 5931.0 86 5931.0 86 5931.0 86 6897 7620 5937.88
APR-SEP 6224.9 86 6254.4 86 6212.9 85 7278 7987 5943.57 86
JAN-JUL 7744.9 86 7744.9 86 7744.9 86 9005 9218 7747.70
JAN-SEP 8038.9 86 8068.4 86 8026.9 86 9386 9585 7753.39 86
OCT-SEP 9166.8 88 9196.3 89 9154.9 88 10391
COLUMBIA - MCNARY DAM APR-AUG 72646.5 85 73016.2 85 72505.2 85 85421 92599 67395.86 86
APR-JUL 67168.0 86 67168.0 86 67168.0 86 77883 84969 67175.75
APR-SEP 76723.8 85 77981.5 86 76298.6 85 90262 97265 67395.86 86
JAN-JUL 81746.7 84 81746.7 84 81746.7 84 96748 100397 81776.07
JAN-SEP 91302.6 84 92560.3 85 90877.4 83 109127 112693 81996.18 84
OCT-SEP 106298.2 86 107555.9 87 105873.0 86 123818
UMATILLA - NEAR GIBBON APR-AUG 71.2 92 71.2 92 71.1 92 77 111 68.98 93
APR-JUL 68.7 93 68.7 93 68.7 93 74 108 68.89
APR-SEP 73.4 92 73.5 92 73.3 92 80 114 68.98 93
JAN-JUL 130.1 95 130.1 95 130.1 95 137 216 130.23
JAN-SEP 134.8 95 134.9 95 134.7 95 142 221 130.32 95
OCT-SEP 159.7 97 159.8 97 159.6 97 164
UMATILLA - AT PENDLETON APR-AUG 167.6 109 167.7 109 167.6 109 154 184 165.92 109
APR-JUL 165.1 109 165.1 109 165.1 109 151 181 165.82
APR-SEP 170.0 108 170.3 108 169.8 108 157 187 165.92 109
JAN-JUL 332.8 105 332.8 105 332.8 105 317 417 333.14
JAN-SEP 337.7 105 338.0 105 337.5 105 322 423 333.24 105
OCT-SEP 386.8 105 387.1 105 386.6 105 368
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
NF JOHN DAY - AT MONUMENT APR-AUG 324.2 55 325.3 55 324.0 55 590 564 322.26 55
APR-JUL 321.1 55 321.1 55 321.1 55 581 559 322.17
APR-SEP 329.0 55 331.1 55 328.0 55 598 569 322.26 55
JAN-JUL 489.9 53 489.9 53 489.9 53 920 756 490.05
JAN-SEP 497.8 53 499.9 53 496.8 53 937 766 490.14 53
OCT-SEP 530.2 53 532.3 53 529.2 53 1006
JOHN DAY - AT SERVICE CK APR-AUG 432.0 52 433.8 52 431.8 52 830 783 433.18 53
APR-JUL 431.7 53 431.7 53 431.7 53 818 779 433.11
APR-SEP 436.7 52 440.0 52 435.0 52 842 788 433.18 53
JAN-JUL 701.8 53 701.8 53 701.8 53 1335 1086 702.07
JAN-SEP 706.8 52 710.1 52 705.2 52 1359 1095 702.14 53
OCT-SEP 771.7 52 775.0 52 770.0 52 1486
COLUMBIA - JOHN DAY DAM APR-AUG 71299.6 83 71668.9 84 71158.4 83 85818 91945 66032.87 84
APR-JUL 65819.1 84 65819.1 84 65819.1 84 78433 84800 65835.89
APR-SEP 75448.8 83 76709.0 85 75022.0 83 90714 96476 66032.87 84
JAN-JUL 80672.7 82 80672.7 82 80672.7 82 98586 100961 80708.80
JAN-SEP 90302.5 81 91562.7 83 89875.7 81 110866 112637 80905.78 82
OCT-SEP 105115.5 83 106375.6 84 104688.7 83 126095
DESCHUTES - AT MOODY NR BIGGS APR-AUG 1375.7 83 1375.8 83 1375.7 83 1649 1399 1116.61 80
APR-JUL 1105.8 80 1105.8 80 1105.8 80 1377 1147 1108.28
APR-SEP 1635.1 85 1635.7 85 1634.8 85 1916 1642 1116.61 80
JAN-JUL 2023.8 76 2023.8 76 2023.8 76 2660 2085 2026.42
JAN-SEP 2553.1 80 2553.7 80 2552.8 80 3199 2580 2034.75 76
OCT-SEP 3413.5 81 3414.1 81 3413.2 81 4202
COLUMBIA - THE DALLES DAM APR-AUG 71597.2 82 71966.2 82 71456.0 82 87532 91841 66217.00 82
APR-JUL 66016.6 83 66016.6 83 66016.6 83 79855 84610 66032.52
APR-SEP 75929.0 82 77189.1 83 75502.2 81 92704 96591 66217.00 82
JAN-JUL 82249.3 81 82249.3 81 82249.3 81 101368 101597 82284.42
JAN-SEP 92161.7 81 93421.8 82 91734.9 80 114216 113578 82468.90 81
OCT-SEP 107331.8 82 108591.9 83 106905.0 82 130518
COLUMBIA - BONNEVILLE DAM APR-AUG 72575.5 82 72946.1 83 72436.7 82 88403 93014 67111.21 83
APR-JUL 66897.2 83 66897.2 83 66897.2 83 80530 85610 66909.62
APR-SEP 76985.3 82 78257.6 84 76567.8 82 93618 98071 67111.21 83
JAN-JUL 84550.7 82 84550.7 82 84550.7 82 102951 103980 84598.79
JAN-SEP 94638.9 82 95911.1 83 94221.3 81 116039 116441 84800.38 82
OCT-SEP 111359.4 84 112631.7 85 110941.9 84 132751
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
MCKENZIE - NEAR VIDA APR-AUG 786.4 72 789.6 73 786.1 72 1085 951 695.71 71
APR-JUL 690.5 71 690.5 71 690.5 71 971 861 692.17
APR-SEP 868.0 73 893.6 75 863.3 73 1188 1021 695.71 71
JAN-JUL 1636.1 82 1636.1 82 1636.1 82 1987 1778 1638.81
JAN-SEP 1813.6 82 1839.2 83 1808.9 82 2205 1938 1642.35 82
OCT-SEP 2452.1 84 2477.7 84 2447.4 83 2934
NORTH SANTIAM - AT MEHAMA APR-AUG 505.4 64 507.4 64 505.1 64 789 778 473.36 64
APR-JUL 471.0 64 471.0 64 471.0 64 739 732 472.05
APR-SEP 537.1 64 556.1 66 534.3 64 837 829 473.36 64
JAN-JUL 1445.4 87 1445.4 87 1445.4 87 1670 1660 1448.13
JAN-SEP 1511.5 85 1530.4 87 1508.6 85 1768 1757 1449.44 87
OCT-SEP 2289.1 93 2308.0 94 2286.2 93 2455
SOUTH SANTIAM - AT WATERLOO APR-AUG 233.7 41 235.5 41 233.4 41 568 547 225.27 41
APR-JUL 223.8 40 223.8 40 223.8 40 554 532 224.90
APR-SEP 242.3 41 258.4 44 239.5 41 587 567 225.27 41
JAN-JUL 1124.7 77 1124.7 77 1124.7 77 1456 1412 1127.29
JAN-SEP 1143.2 77 1159.3 78 1140.5 77 1489 1448 1127.66 77
OCT-SEP 1746.5 82 1762.6 82 1743.7 81 2142
WILLAMETTE - AT SALEM APR-AUG 2217.9 49 2239.4 50 2216.4 49 4524 3968 2108.31 49
APR-JUL 2095.3 49 2095.3 49 2095.3 49 4306 3779 2102.28
APR-SEP 2335.6 49 2471.5 52 2309.2 49 4727 4139 2108.31 49
JAN-JUL 9157.5 80 9157.5 80 9157.5 80 11495 9788 9175.65
JAN-SEP 9397.9 79 9533.7 80 9371.4 79 11916 10148 9181.68 80
OCT-SEP 13102.7 80 13238.5 81 13076.2 80 16389
CLACKAMAS - AT ESTACADA APR-AUG 463.5 68 465.2 69 463.3 68 678 509 421.00 67
APR-JUL 418.0 67 418.0 67 418.0 67 624 468 419.22
APR-SEP 501.3 68 509.2 70 499.1 68 732 550 421.00 67
JAN-JUL 1113.5 83 1113.5 83 1113.5 83 1349 1067 1114.92
JAN-SEP 1196.8 82 1204.7 83 1194.7 82 1457 1149 1116.70 83
OCT-SEP 1608.8 81 1616.7 82 1606.7 81 1980
LEWIS - MERWIN DAM APR-AUG 720.0 68 723.9 68 720.0 68 1060 863 681.04 68
APR-JUL 677.2 68 677.2 68 677.2 68 992 804 679.08
APR-SEP 761.6 68 790.0 70 753.3 67 1125 927 681.04 68
JAN-JUL 1990.5 88 1990.5 88 1990.5 88 2259 2381 1995.24
JAN-SEP 2074.9 87 2103.3 88 2066.6 86 2391 2505 1997.20 88
OCT-SEP 2959.3 88 2987.7 89 2951.0 88 3351
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
COWLITZ - MAYFIELD RESERVOIR APR-AUG 1606.2 92 1614.9 93 1603.2 92 1740 1637 1490.71 91
APR-JUL 1479.9 91 1479.9 91 1479.9 91 1624 1506 1481.66
APR-SEP 1690.9 92 1717.3 94 1677.8 91 1835 1758 1490.71 91
JAN-JUL 3123.8 101 3123.8 101 3123.8 101 3098 3648 3129.37
JAN-SEP 3334.8 101 3361.1 102 3321.6 100 3310 3901 3138.42 101
OCT-SEP 4455.4 101 4481.8 101 4442.3 100 4429
COWLITZ - AT CASTLE ROCK APR-AUG 1900.7 79 1911.4 80 1897.5 79 2399 2181 1762.26 79
APR-JUL 1752.0 79 1752.0 79 1752.0 79 2223 2006 1755.46
APR-SEP 2010.6 79 2052.1 81 1992.1 79 2532 2342 1762.26 79
JAN-JUL 4315.3 95 4315.3 95 4315.3 95 4562 5355 4323.53
JAN-SEP 4573.9 94 4615.4 95 4555.4 94 4872 5691 4330.33 95
OCT-SEP 6166.6 94 6208.1 94 6148.1 93 6589
ROGUE - AT RAYGOLD APR-AUG 414.7 55 417.4 55 414.4 55 760 580 368.97 53
APR-JUL 366.0 53 366.0 53 366.0 53 687 519 367.09
APR-SEP 462.9 56 469.0 56 460.7 55 833 640 368.97 53
JAN-JUL 860.5 59 860.5 59 860.5 59 1454 1024 861.78
JAN-SEP 957.5 60 963.5 60 955.3 60 1599 1146 863.66 59
OCT-SEP 1237.5 60 1243.5 60 1235.3 60 2065
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