Northwest River Forecast Center
Water Supply Seasonal Forecasts
Ensemble Date: 2026-02-22 Issued Date: 2026-02-22
Water Year 2026
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SILVIES - NEAR BURNS APR-AUG 9.4 13 21.4 30 4.5 6 71 158
APR-JUL 9.4 13 21.4 31 4.5 6 70 156
APR-SEP 9.4 13 21.4 30 4.5 6 71 160
JAN-JUL 34.2 32 52.5 48 25.3 23 108 281 9.08 75
JAN-SEP 34.2 31 52.6 48 25.3 23 110 284 9.08 75
OCT-SEP 41.9 36 60.2 52 33.0 28 116
DONNER UND BLITZEN - NR FRENCHGLEN APR-AUG 27.0 45 50.3 84 15.3 25 60 77
APR-JUL 24.7 43 47.5 83 13.6 24 57 73
APR-SEP 28.9 46 52.9 85 16.9 27 63 80
JAN-JUL 40.4 54 64.5 87 27.9 38 74 114 6.20 86
JAN-SEP 44.1 56 69.4 87 31.4 40 79 121 6.20 86
OCT-SEP 54.4 62 79.7 91 41.7 48 88
DUNGENESS - NEAR SEQUIM APR-AUG 109.4 81 142.7 105 92.1 68 136 108
APR-JUL 99.7 82 129.4 107 83.1 69 121 100
APR-SEP 116.9 81 154.4 107 98.9 68 145 113
JAN-JUL 172.3 89 209.6 108 157.3 81 195 147 47.75 99
JAN-SEP 189.2 87 232.8 107 173.0 79 219 160 47.75 99
OCT-SEP 282.8 98 326.3 114 266.5 93 287
SKAGIT - NEAR CONCRETE APR-AUG 4670.6 84 5526.8 100 4060.1 73 5549 3966
APR-JUL 4193.5 85 4970.5 100 3522.7 71 4959 3545
APR-SEP 5009.2 84 5966.4 100 4384.7 74 5955 4236
JAN-JUL 6820.7 93 7826.3 107 6121.7 83 7334 5445 1880.57 127
JAN-SEP 7703.1 92 8744.1 105 7027.7 84 8330 6136 1880.57 127
OCT-SEP 11839.9 108 12880.9 117 11164.5 102 10972
COLUMBIA - MICA DAM APR-AUG 12027.1 108 13704.5 123 10896.7 98 11166 10191
APR-JUL 9960.9 110 11457.0 126 8432.9 93 9064 8132
APR-SEP 13312.6 108 15109.6 123 12093.9 98 12296 11509
JAN-JUL 10794.3 110 12230.4 124 9186.5 93 9850 8925 409.33 89
JAN-SEP 14014.0 107 15913.7 122 12849.0 98 13082 12302 409.33 89
OCT-SEP 15292.3 106 17192.0 119 14127.4 98 14472
COLUMBIA - REVELSTOKE DAM APR-AUG 17178.8 109 19129.2 121 15558.5 99 15746 14447
APR-JUL 14366.1 110 16255.0 125 12504.8 96 13046 11785
APR-SEP 18942.3 110 21135.8 123 17077.8 99 17242 16099
JAN-JUL 15593.0 110 17539.9 124 13655.3 97 14115 12936 659.96 107
JAN-SEP 20033.4 109 22373.5 122 18271.1 100 18311 17250 659.96 107
OCT-SEP 22003.7 108 24343.7 120 20241.4 100 20340
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
COLUMBIA - ARROW LAKES (HUGH KEENLEYSIDE DAM)APR-AUG 24438.7 110 27021.0 122 22019.8 99 22135 20023
APR-JUL 20390.6 109 23062.8 123 17798.2 95 18779 16696
APR-SEP 26843.8 112 29435.0 122 23798.0 99 24059 22004
JAN-JUL 22521.5 109 25377.5 123 19896.8 96 20698 18826 1272.57 118
JAN-SEP 28903.7 111 31721.8 122 25981.5 100 25978 24134 1272.57 118
OCT-SEP 31924.4 110 34742.6 119 29002.3 100 29084
KOOTENAI - LIBBY DAM APR-AUG 6607.1 109 7829.9 129 5848.7 96 6080 4257
APR-JUL 6138.1 110 7207.6 129 5280.5 95 5570 3840
APR-SEP 7070.1 110 8209.8 128 6262.9 97 6429 4497
JAN-JUL 6967.3 112 8066.8 130 6107.4 98 6227 4314 493.88 138
JAN-SEP 7813.6 110 9030.6 127 7089.1 100 7086 4971 493.88 138
OCT-SEP 8761.6 110 9978.7 125 8037.2 101 7981
KOOTENAI - AT LEONIA APR-AUG 7891.6 107 9153.5 124 6854.2 93 7409 5183
APR-JUL 7266.3 106 8469.4 123 6300.0 92 6858 4741
APR-SEP 8275.8 106 9620.3 123 7264.8 93 7803 5446
JAN-JUL 8582.3 109 9784.1 124 7608.2 97 7877 5488 777.17 150
JAN-SEP 9618.9 109 10915.4 124 8647.4 98 8822 6194 777.17 150
OCT-SEP 11186.8 113 12483.2 126 10215.3 103 9923
MOYIE - AT EASTPORT APR-AUG 414.9 106 501.1 129 306.0 79 390 253
APR-JUL 401.2 105 487.5 128 297.1 78 382 246
APR-SEP 423.3 107 510.1 129 313.2 79 395 257
JAN-JUL 479.4 111 581.4 135 410.0 95 431 274 48.63 250
JAN-SEP 498.7 112 603.2 136 428.0 97 443 286 48.63 250
OCT-SEP 571.6 119 676.1 141 500.8 105 479
KOOTENAI - AT BONNERS FERRY APR-AUG 8512.1 106 9902.0 123 7391.7 92 8061 5650
APR-JUL 8006.4 107 9259.2 124 6821.6 91 7495 5174
APR-SEP 8978.3 106 10368.5 123 7826.3 92 8463 5941
JAN-JUL 9327.5 109 10686.5 124 8280.8 96 8596 5962 852.11 154
JAN-SEP 10363.1 108 11797.7 123 9354.7 98 9565 6729 852.11 154
OCT-SEP 12101.1 113 13535.7 126 11092.7 103 10724
DUNCAN - DUNCAN DAM APR-AUG 2237.9 110 2518.9 123 2055.5 101 2040 1744
APR-JUL 1914.0 112 2191.2 128 1704.3 100 1713 1455
APR-SEP 2404.9 108 2679.7 120 2221.1 100 2224 1928
JAN-JUL 2070.4 112 2346.2 127 1851.4 100 1849 1589 98.79 120
JAN-SEP 2565.5 109 2841.6 120 2375.8 101 2361 2062 98.79 120
OCT-SEP 2774.9 106 3051.0 116 2585.2 99 2620
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
KOOTENAI - KOOTENAY L AT QUEENS BAY APR-AUG 16213.6 108 18076.3 120 14181.4 94 15052 10979
APR-JUL 15000.0 108 16757.2 121 12765.5 92 13836 10020
APR-SEP 17014.1 107 18897.4 119 14963.6 94 15842 11519
JAN-JUL 17282.9 110 19126.2 121 15036.3 95 15754 11492 1341.41 136
JAN-SEP 19294.8 109 21327.5 120 17238.1 97 17761 12991 1341.41 136
OCT-SEP 21946.2 110 23978.8 121 19889.5 100 19885
SLOCAN - NEAR CRESCENT VALLEY APR-AUG 2084.6 113 2306.7 125 1789.2 97 1850 1429
APR-JUL 1921.9 113 2157.9 126 1610.5 94 1708 1339
APR-SEP 2233.1 116 2406.2 125 1868.6 97 1933 1478
JAN-JUL 2165.0 114 2394.6 127 1823.7 96 1892 1494 139.69 141
JAN-SEP 2458.0 116 2644.8 125 2108.7 100 2116 1634 139.69 141
OCT-SEP 2653.9 112 2840.7 120 2304.6 97 2364
COLUMBIA - AT BIRCHBANK APR-AUG 42703.6 107 47039.2 118 37964.9 96 39736 32748
APR-JUL 37501.6 107 41615.0 119 32546.1 93 34960 28363
APR-SEP 45912.1 108 50543.1 119 40651.6 95 42578 35371
JAN-JUL 42652.6 109 46811.1 120 37658.0 96 39168 32229 2928.73 129
JAN-SEP 50888.2 109 55542.0 119 45717.2 98 46786 39237 2928.73 129
OCT-SEP 56795.2 108 61448.9 117 51624.2 99 52397
BLACKFOOT - NEAR BONNER APR-AUG 640.0 75 769.1 90 477.6 56 855 415
APR-JUL 596.4 74 723.7 89 445.1 55 811 390
APR-SEP 674.7 76 807.6 91 506.5 57 891 435
JAN-JUL 770.7 82 890.2 95 615.2 66 937 474 93.87 154
JAN-SEP 838.9 82 975.1 96 680.9 67 1017 519 93.87 154
OCT-SEP 969.5 86 1105.8 98 811.5 72 1126
CLARK FORK - ABOVE BLACKFOOT APR-AUG 527.3 83 797.0 125 367.7 58 637 380
APR-JUL 489.4 82 747.8 126 339.7 57 594 358
APR-SEP 576.1 85 847.6 125 397.6 58 680 399
JAN-JUL 636.6 84 902.3 119 492.9 65 756 483 85.54 101
JAN-SEP 723.3 86 1002.1 119 549.7 65 842 523 85.54 101
OCT-SEP 867.2 87 1145.9 115 693.5 70 996
CLARK FORK - ABOVE MISSOULA APR-AUG 1175.1 79 1558.1 104 874.3 59 1492 795
APR-JUL 1096.8 78 1462.7 104 812.3 58 1405 748
APR-SEP 1247.1 79 1646.5 105 944.5 60 1571 834
JAN-JUL 1419.3 84 1788.9 106 1131.4 67 1693 956 179.40 123
JAN-SEP 1569.6 84 1972.7 106 1263.6 68 1859 1042 179.40 123
OCT-SEP 1844.1 87 2247.2 106 1538.1 72 2122
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
BITTERROOT - NEAR DARBY APR-AUG 425.3 86 558.4 112 310.5 63 497 323
APR-JUL 395.1 85 519.0 112 285.9 61 465 296
APR-SEP 449.3 87 585.1 113 331.8 64 519 339
JAN-JUL 465.0 89 583.2 112 349.2 67 521 342 41.04 152
JAN-SEP 519.4 90 649.0 113 395.1 69 575 384 41.04 152
OCT-SEP 582.5 93 712.1 114 458.2 73 624
BITTERROOT - NEAR MISSOULA APR-AUG 1146.2 92 1378.5 111 875.6 71 1241 812
APR-JUL 1095.2 92 1319.5 111 829.3 70 1191 777
APR-SEP 1194.7 93 1431.7 111 923.3 72 1289 843
JAN-JUL 1376.4 99 1582.4 114 1109.1 80 1385 942 148.13 150
JAN-SEP 1478.1 100 1695.0 114 1203.1 81 1484 1008 148.13 150
OCT-SEP 1760.5 105 1977.5 118 1485.5 89 1669
CLARK FORK - BELOW MISSOULA APR-AUG 2275.0 82 2914.9 105 1776.5 64 2767 1551
APR-JUL 2143.2 81 2765.8 105 1666.8 63 2630 1465
APR-SEP 2391.4 83 3055.0 106 1897.8 66 2893 1626
JAN-JUL 2813.6 90 3361.7 108 2224.8 71 3121 1838 319.15 128
JAN-SEP 3052.7 90 3659.0 108 2464.0 73 3384 1999 319.15 128
OCT-SEP 3601.2 94 4207.5 110 3012.4 78 3838
CLARK FORK - AT ST REGIS APR-AUG 3074.1 85 3750.4 104 2489.9 69 3610 2086
APR-JUL 2886.4 84 3548.5 103 2341.3 68 3429 1970
APR-SEP 3242.3 86 3933.6 104 2634.2 70 3771 2185
JAN-JUL 3832.9 93 4456.9 108 3183.1 77 4109 2467 484.37 143
JAN-SEP 4164.1 94 4818.0 108 3476.7 78 4451 2682 484.37 143
OCT-SEP 4964.6 98 5618.4 111 4277.1 85 5042
NF FLATHEAD - NEAR COLUMBIA FALLS APR-AUG 1384.8 82 1708.8 101 1111.8 66 1690 1231
APR-JUL 1309.0 82 1605.5 100 1040.4 65 1600 1157
APR-SEP 1438.3 82 1773.1 101 1163.6 66 1750 1272
JAN-JUL 1611.9 91 1860.4 105 1344.2 76 1771 1291 170.06 202
JAN-SEP 1757.1 91 2029.9 106 1467.5 76 1921 1406 170.06 202
OCT-SEP 2136.3 100 2409.2 113 1846.7 87 2133
MF FLATHEAD - NEAR WEST GLACIER APR-AUG 1366.8 83 1697.6 103 1086.0 66 1651 1232
APR-JUL 1295.3 82 1608.8 102 1034.4 66 1576 1181
APR-SEP 1423.5 84 1762.7 104 1121.1 66 1697 1258
JAN-JUL 1545.3 89 1882.8 108 1285.2 74 1744 1339 173.42 217
JAN-SEP 1668.6 89 2021.2 108 1376.5 74 1865 1416 173.42 217
OCT-SEP 2116.3 103 2468.8 120 1824.1 88 2065
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SF FLATHEAD - HUNGRY HORSE DAM APR-AUG 1752.3 86 2062.8 101 1474.1 72 2043 1423
APR-JUL 1699.1 86 1991.3 101 1425.6 72 1981 1388
APR-SEP 1791.1 86 2105.6 101 1523.3 73 2088 1445
JAN-JUL 2056.2 92 2371.5 106 1766.8 79 2236 1645 228.04 189
JAN-SEP 2158.9 92 2483.0 106 1863.1 80 2343 1702 228.04 189
OCT-SEP 2685.6 105 3009.8 117 2389.9 93 2567
FLATHEAD - AT COLUMBIA FALLS APR-AUG 4717.6 86 5492.8 100 3673.2 67 5473 3853
APR-JUL 4497.3 86 5197.8 99 3500.5 67 5237 3691
APR-SEP 4874.6 87 5690.6 101 3816.9 68 5634 3940
JAN-JUL 5355.0 92 6239.2 107 4461.8 76 5847 4174 583.37 197
JAN-SEP 5731.5 92 6658.8 107 4782.7 77 6244 4422 583.37 197
OCT-SEP 7076.3 102 8003.6 116 6127.6 89 6906
FLATHEAD - SELI’Š KSANKA QLISPE’ DAMAPR-AUG 5239.1 82 6255.9 98 4055.2 63 6396 4521
APR-JUL 5009.3 82 5955.3 97 3885.9 63 6137 4325
APR-SEP 5390.0 82 6456.8 98 4202.3 64 6577 4616
JAN-JUL 6082.8 87 7253.5 103 5060.2 72 7010 5036 737.08 171
JAN-SEP 6487.0 87 7701.4 103 5382.8 72 7450 5327 737.08 171
OCT-SEP 8028.7 97 9243.1 112 6924.5 84 8277
CLARK FORK - NEAR PLAINS APR-AUG 8590.0 84 10528.1 103 6991.0 68 10215 6872
APR-JUL 8114.7 83 10003.7 103 6625.7 68 9749 6542
APR-SEP 8956.2 85 10942.4 103 7324.0 69 10574 7082
JAN-JUL 10227.8 90 12243.3 108 8739.8 77 11342 7814 1260.51 159
JAN-SEP 11029.4 91 13154.2 108 9439.2 78 12168 8354 1260.51 159
OCT-SEP 13433.8 99 15558.7 114 11843.6 87 13632
CLARK FORK - CABINET GORGE DAM APR-AUG 9859.3 87 11952.3 106 8013.7 71 11280 6998
APR-JUL 9279.8 86 11326.1 105 7568.1 70 10767 6687
APR-SEP 10287.2 88 12447.4 107 8416.1 72 11639 7179
JAN-JUL 11695.6 93 14096.1 112 10066.7 80 12591 7935 1387.69 156
JAN-SEP 12663.8 94 15164.2 113 10915.1 81 13463 8428 1387.69 156
OCT-SEP 15311.5 102 17811.9 119 13562.9 90 14991
PRIEST - NEAR PRIEST RIVER APR-AUG 570.1 69 692.9 84 416.8 51 823 637
APR-JUL 536.0 67 661.2 83 402.2 50 800 621
APR-SEP 594.7 71 723.5 86 433.5 51 843 649
JAN-JUL 892.1 87 1038.0 101 726.9 71 1026 804 135.81 136
JAN-SEP 951.6 89 1108.0 104 759.5 71 1069 832 135.81 136
OCT-SEP 1179.5 97 1335.9 110 987.4 81 1217
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
PEND OREILLE - ALBENI FALLS DAM APR-AUG 10929.5 85 13242.1 102 8835.7 68 12919 8764
APR-JUL 10315.2 83 12574.0 102 8394.8 68 12369 8391
APR-SEP 11370.7 85 13834.3 104 9244.4 69 13347 9030
JAN-JUL 13640.7 91 16270.1 109 11727.9 79 14922 10473 1847.48 149
JAN-SEP 14733.5 93 17310.9 109 12520.7 79 15900 11112 1847.48 149
OCT-SEP 18168.3 101 20745.7 116 15955.5 89 17911
COLUMBIA - AT INTL BOUNDARY APR-AUG 54483.6 102 59742.9 111 48841.3 91 53664 42218
APR-JUL 49164.8 102 53209.9 110 42929.8 89 48307 37452
APR-SEP 57791.0 101 63749.1 112 52322.1 92 56951 45091
JAN-JUL 57926.6 105 62033.2 112 51702.9 94 55223 43551 4919.33 138
JAN-SEP 66459.1 104 72776.6 114 60764.2 95 63866 51189 4919.33 138
OCT-SEP 75991.1 106 82308.6 115 70296.1 98 71709
KETTLE - AT LAURIER APR-AUG 1295.6 67 1759.5 91 810.1 42 1928 1670
APR-JUL 1264.7 67 1652.5 88 785.5 42 1886 1646
APR-SEP 1320.9 68 1811.3 93 824.1 42 1954 1682
JAN-JUL 1467.4 71 1875.3 91 1026.7 50 2058 1798 114.21 170
JAN-SEP 1522.0 72 2030.6 96 1057.6 50 2125 1833 114.21 170
OCT-SEP 1637.7 73 2146.3 96 1173.3 52 2247
NF COEUR D ALENE - AT ENAVILLE APR-AUG 531.4 73 687.4 95 337.3 46 727 462
APR-JUL 508.5 72 664.7 94 320.9 45 708 450
APR-SEP 548.0 74 705.3 95 352.0 47 743 472
JAN-JUL 1023.0 91 1183.8 105 829.3 73 1129 831 263.85 134
JAN-SEP 1058.2 91 1223.2 105 861.2 74 1164 853 263.85 134
OCT-SEP 1490.1 113 1655.2 125 1293.2 98 1322
ST JOE - AT CALDER APR-AUG 854.4 77 1054.4 95 644.1 58 1112 745
APR-JUL 818.6 76 1013.8 94 617.7 57 1076 722
APR-SEP 878.0 77 1082.5 95 666.1 59 1138 763
JAN-JUL 1276.2 90 1496.2 106 1134.7 80 1415 1020 255.23 165
JAN-SEP 1335.0 90 1566.7 106 1182.7 80 1477 1062 255.23 165
OCT-SEP 1762.1 108 1993.8 122 1609.8 98 1636
COEUR D ALENE - COEUR D ALENE LAKE APR-AUG 1794.1 73 2244.2 91 1204.3 49 2470 1484
APR-JUL 1752.3 72 2193.8 90 1168.3 48 2428 1473
APR-SEP 1829.8 73 2283.8 91 1237.1 49 2504 1499
JAN-JUL 3184.2 82 3640.2 94 2656.3 69 3868 2717 716.14 105
JAN-SEP 3269.4 83 3736.2 95 2730.0 69 3945 2744 716.14 105
OCT-SEP 4408.8 99 4875.6 109 3869.4 87 4461
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SPOKANE - AT SPOKANE APR-AUG 1850.5 73 2313.1 91 1246.4 49 2540 1553
APR-JUL 1789.4 72 2240.0 91 1194.4 48 2475 1526
APR-SEP 1896.7 73 2360.3 91 1285.5 50 2587 1570
JAN-JUL 3276.5 83 3741.8 95 2733.7 70 3926 2778 760.05 109
JAN-SEP 3390.4 84 3870.1 96 2831.6 70 4038 2823 760.05 109
OCT-SEP 4492.7 98 4972.4 108 3934.0 86 4584
SPOKANE - AT LONGLAKE APR-AUG 2088.7 74 2552.8 91 1456.5 52 2817 1705
APR-JUL 1981.5 73 2442.4 90 1368.6 50 2714 1649
APR-SEP 2174.0 75 2637.1 91 1530.5 53 2901 1753
JAN-JUL 3625.8 82 4119.4 93 3055.8 69 4433 3084 825.78 98
JAN-SEP 3813.2 83 4322.7 94 3227.0 70 4619 3189 825.78 98
OCT-SEP 5008.4 95 5517.9 104 4422.2 84 5295
COLUMBIA - GRAND COULEE DAM APR-AUG 57627.4 99 63762.1 110 51538.8 89 58186 45448
APR-JUL 52012.7 99 56836.6 108 45449.9 86 52774 40738
APR-SEP 61443.7 100 68010.1 111 55124.0 90 61483 48260
JAN-JUL 62505.9 101 67700.5 110 56270.3 91 61749 48445 5676.02 126
JAN-SEP 71912.2 102 78698.5 112 65295.3 93 70457 55967 5676.02 126
OCT-SEP 82470.4 105 89256.8 113 75853.5 96 78842
SIMILKAMEEN - NEAR HEDLEY APR-AUG 1005.9 102 1218.6 124 839.8 85 984 464
APR-JUL 989.2 103 1191.4 125 825.8 86 956 454
APR-SEP 1017.9 101 1254.6 125 860.7 86 1004 471
JAN-JUL 1225.1 114 1433.0 133 1109.9 103 1078 543 167.33 269
JAN-SEP 1267.7 113 1498.4 133 1144.6 102 1126 560 167.33 269
OCT-SEP 1549.4 123 1780.1 142 1426.3 113 1257
SIMILKAMEEN - NEAR NIGHTHAWK APR-AUG 1289.8 97 1599.4 120 1055.6 79 1335 664
APR-JUL 1275.9 99 1529.4 119 1043.2 81 1286 646
APR-SEP 1313.6 96 1639.8 120 1087.9 80 1366 675
JAN-JUL 1607.6 111 1841.3 128 1362.7 94 1443 745 217.38 259
JAN-SEP 1663.3 109 1951.2 128 1411.1 93 1522 774 217.38 259
OCT-SEP 1990.0 118 2277.8 135 1737.7 103 1692
OKANOGAN - NEAR TONASKET APR-AUG 1388.8 84 1882.1 114 1163.6 70 1656 855
APR-JUL 1344.9 86 1776.4 113 1123.3 72 1566 815
APR-SEP 1463.4 85 1953.2 114 1216.6 71 1720 889
JAN-JUL 1784.1 97 2151.3 117 1489.9 81 1832 977 248.95 175
JAN-SEP 1869.2 94 2334.4 118 1581.8 80 1986 1051 248.95 175
OCT-SEP 2252.6 101 2717.8 121 1965.2 88 2238
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
METHOW - NEAR PATEROS APR-AUG 1044.6 111 1239.0 132 859.8 91 942 679
APR-JUL 1006.3 111 1208.9 134 831.9 92 904 659
APR-SEP 1077.4 112 1262.4 131 881.8 91 965 695
JAN-JUL 1235.8 123 1447.2 145 1073.2 107 1001 744 149.40 312
JAN-SEP 1288.0 121 1500.1 141 1122.5 106 1063 781 149.40 312
OCT-SEP 1517.7 131 1729.8 149 1352.1 116 1162
STEHEKIN - AT STEHEKIN APR-AUG 602.2 77 729.1 94 532.4 68 778 559
APR-JUL 563.0 79 655.5 92 489.4 69 710 522
APR-SEP 621.6 76 766.1 94 551.0 68 814 580
JAN-JUL 684.8 85 781.6 97 609.8 75 809 612 92.13 177
JAN-SEP 759.9 83 897.3 98 682.9 75 913 671 92.13 177
OCT-SEP 1040.3 99 1177.6 113 963.2 92 1046
CHELAN - LAKE CHELAN DAM APR-AUG 825.2 75 1019.5 92 708.0 64 1102 772
APR-JUL 759.7 74 935.9 91 644.3 63 1029 732
APR-SEP 851.0 75 1065.9 94 730.1 64 1139 790
JAN-JUL 1024.6 84 1193.7 98 886.0 73 1217 886 194.21 196
JAN-SEP 1105.6 83 1336.9 101 978.2 74 1326 943 194.21 196
OCT-SEP 1559.3 103 1790.6 118 1431.8 94 1518
WENATCHEE - AT PESHASTIN APR-AUG 1066.8 73 1345.2 93 884.4 61 1454 1082
APR-JUL 1022.1 74 1278.2 93 838.1 61 1379 1046
APR-SEP 1098.8 73 1382.5 92 914.9 61 1496 1104
JAN-JUL 1506.5 87 1786.8 104 1290.0 75 1726 1337 321.73 170
JAN-SEP 1589.5 86 1889.3 103 1376.1 75 1842 1394 321.73 170
OCT-SEP 2351.7 108 2651.5 122 2138.4 98 2175
COLUMBIA - BLO ROCK ISLAND DAM APR-AUG 62345.5 97 69159.8 108 55757.5 87 64028 49150
APR-JUL 56162.9 96 62345.2 107 49262.3 85 58256 44311
APR-SEP 66258.9 98 73598.5 109 59490.5 88 67524 52003
JAN-JUL 68750.6 100 74684.6 109 61931.6 90 68440 52894 7033.57 137
JAN-SEP 78286.1 101 86384.7 111 71390.8 92 77708 60586 7033.57 137
OCT-SEP 90936.4 104 99034.9 114 84041.1 96 87167
COLUMBIA - BLO PRIEST RAPIDS DAM APR-AUG 62356.5 96 69169.5 107 55772.5 86 64656 49743
APR-JUL 56159.9 95 62345.7 106 49273.7 84 58905 44904
APR-SEP 66272.7 97 73612.2 108 59506.3 87 68162 52642
JAN-JUL 68839.4 99 74763.3 108 62019.7 89 69359 53727 7113.60 134
JAN-SEP 78377.4 100 86475.2 110 71482.4 91 78616 61465 7113.60 134
OCT-SEP 91324.7 104 99422.4 113 84429.7 96 88197
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
YAKIMA - NEAR MARTIN APR-AUG 75.5 61 96.0 77 54.4 44 124 91
APR-JUL 72.6 62 93.1 79 52.0 44 118 88
APR-SEP 78.1 60 99.4 77 56.4 44 129 92
JAN-JUL 122.6 69 146.6 83 102.7 58 176 144 32.48 92
JAN-SEP 128.0 68 152.3 81 106.9 57 188 147 32.48 92
OCT-SEP 240.7 97 264.9 106 219.5 88 249
KACHESS - NEAR EASTON APR-AUG 64.6 60 84.2 78 46.3 43 108 80
APR-JUL 63.7 62 82.7 80 45.5 44 104 75
APR-SEP 65.8 58 86.0 75 47.3 42 114 84
JAN-JUL 112.8 71 135.7 86 93.8 59 158 123 32.15 100
JAN-SEP 114.8 68 138.6 82 95.8 57 168 132 32.15 100
OCT-SEP 212.7 97 236.5 108 193.7 89 218
CLE ELUM - NEAR ROSLYN APR-AUG 249.8 61 332.4 82 206.9 51 407 290
APR-JUL 244.3 63 325.6 84 201.3 52 386 274
APR-SEP 255.2 61 337.8 81 211.8 51 419 296
JAN-JUL 367.3 72 444.6 87 325.7 64 512 405 84.73 116
JAN-SEP 378.2 69 455.6 84 337.7 62 545 426 84.73 116
OCT-SEP 670.5 100 747.9 111 630.1 94 672
YAKIMA - NEAR HORLICK APR-AUG 560.4 61 737.7 81 438.3 48 916 623
APR-JUL 536.7 61 713.7 81 417.3 48 876 602
APR-SEP 594.7 62 774.1 80 472.2 49 962 653
JAN-JUL 932.3 71 1107.4 84 811.1 62 1311 1005 260.42 106
JAN-SEP 996.2 71 1165.4 83 867.2 62 1398 1056 260.42 106
OCT-SEP 1767.3 101 1936.5 111 1638.3 94 1746
BUMPING - BELOW BUMPING DAM APR-AUG 78.5 65 98.6 82 62.4 52 120 90
APR-JUL 75.4 66 95.3 83 58.8 51 115 87
APR-SEP 81.2 65 101.9 82 65.2 52 125 92
JAN-JUL 115.9 73 141.8 90 104.1 66 158 122 24.10 93
JAN-SEP 121.4 72 148.3 88 110.1 66 168 127 24.10 93
OCT-SEP 202.1 98 229.1 111 190.9 92 207
TIETON - AT TIETON DAM APR-AUG 181.8 87 209.7 100 160.2 77 209 161
APR-JUL 161.8 85 187.8 98 141.1 74 191 147
APR-SEP 198.2 88 227.4 101 174.9 78 225 164
JAN-JUL 270.2 100 297.3 110 249.8 92 271 217 76.09 161
JAN-SEP 306.9 101 334.3 110 282.8 93 305 234 76.09 161
OCT-SEP 446.4 120 473.8 127 422.2 113 372
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
NACHES - NEAR NACHES APR-AUG 520.6 67 688.9 89 420.9 54 773 584
APR-JUL 490.7 67 658.8 89 390.7 53 737 566
APR-SEP 538.9 67 715.5 89 441.9 55 807 585
JAN-JUL 874.4 85 1025.1 100 797.2 77 1030 790 260.19 159
JAN-SEP 920.2 84 1084.4 99 844.0 77 1100 809 260.19 159
OCT-SEP 1489.2 115 1653.4 128 1413.0 109 1297
YAKIMA - NEAR PARKER APR-AUG 1258.1 70 1613.7 89 1078.0 60 1804 1228
APR-JUL 1172.4 68 1525.5 89 989.9 58 1721 1188
APR-SEP 1385.9 73 1721.9 91 1225.0 65 1899 1268
JAN-JUL 2008.8 77 2384.5 92 1834.0 71 2596 1952 498.14 102
JAN-SEP 2212.8 80 2594.2 94 2066.6 75 2774 2032 498.14 102
OCT-SEP 3520.0 103 3901.4 115 3373.7 99 3404
YAKIMA - AT KIONA APR-AUG 613.3 59 867.0 83 449.9 43 1043 589
APR-JUL 516.7 54 775.2 81 365.5 38 952 530
APR-SEP 698.2 61 954.2 83 535.5 47 1149 655
JAN-JUL 1377.8 77 1658.2 93 1213.8 68 1785 1150 522.18 112
JAN-SEP 1546.3 78 1832.9 92 1379.4 70 1982 1275 522.18 112
OCT-SEP 2361.4 94 2648.0 105 2194.4 87 2516
SNAKE - JACKSON LAKE AT DAM APR-AUG 712.9 87 861.6 106 596.7 73 816 561
APR-JUL 675.1 88 816.8 106 563.0 73 771 537
APR-SEP 747.9 88 895.4 105 627.5 74 849 581
JAN-JUL 758.1 87 898.9 103 651.6 75 869 626 51.95 90
JAN-SEP 831.3 88 977.6 103 715.8 76 947 670 51.95 90
OCT-SEP 925.4 89 1071.7 103 809.9 78 1039
GREYS - AB RES NR ALPINE APR-AUG 290.7 83 357.8 102 241.1 69 350 300
APR-JUL 263.5 82 324.6 101 221.5 69 321 278
APR-SEP 312.2 84 380.9 103 257.2 69 371 317
JAN-JUL 303.8 84 364.1 101 263.8 73 361 309 23.06 108
JAN-SEP 357.0 87 420.4 102 302.5 73 412 347 23.06 108
OCT-SEP 403.0 87 466.4 101 348.5 76 461
SALT - ABV PALISADES RES NR ETNA APR-AUG 284.4 85 370.1 111 219.5 66 335 263
APR-JUL 252.5 84 332.1 110 195.5 65 301 238
APR-SEP 316.0 86 405.1 110 246.2 67 368 291
JAN-JUL 339.6 89 423.2 111 283.2 74 383 317 47.73 107
JAN-SEP 402.3 89 496.1 110 336.9 75 450 370 47.73 107
OCT-SEP 494.1 91 587.9 108 428.6 79 545
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SNAKE - NEAR IRWIN APR-AUG 2996.1 89 3718.1 111 2512.8 75 3362 2683
APR-JUL 2706.2 87 3400.0 110 2321.8 75 3097 2498
APR-SEP 3199.7 89 3961.1 111 2682.0 75 3577 2856
JAN-JUL 3203.2 89 3909.6 109 2821.9 79 3584 2927 265.25 98
JAN-SEP 3706.8 91 4468.6 110 3209.7 79 4064 3285 265.25 98
OCT-SEP 4257.2 92 5019.1 109 3760.2 82 4612
SNAKE - NEAR HEISE APR-AUG 3245.3 90 4040.9 112 2737.7 76 3605 2723
APR-JUL 2945.1 89 3699.6 112 2520.7 76 3308 2511
APR-SEP 3482.2 90 4311.6 112 2930.4 76 3849 2915
JAN-JUL 3539.7 91 4305.5 111 3120.7 81 3871 3021 313.83 100
JAN-SEP 4067.6 92 4915.6 111 3549.2 80 4413 3425 313.83 100
OCT-SEP 4701.6 93 5549.7 110 4183.2 83 5050
FALL RIVER - NEAR CHESTER APR-AUG 259.4 74 337.5 96 189.9 54 352 259
APR-JUL 249.7 76 329.6 100 185.1 56 329 239
APR-SEP 275.6 73 355.6 94 204.3 54 377 281
JAN-JUL 337.5 81 411.8 99 268.4 65 416 318 51.14 103
JAN-SEP 363.6 78 437.7 94 289.2 62 464 360 51.14 103
OCT-SEP 455.8 82 529.9 95 381.4 68 559
HENRYS FORK - AT ST. ANTHONY APR-AUG 512.9 71 643.8 89 367.7 51 720 483
APR-JUL 460.8 72 576.3 90 332.2 52 639 421
APR-SEP 554.8 70 704.1 89 407.8 51 794 539
JAN-JUL 705.4 76 826.2 89 588.5 63 931 671 142.96 84
JAN-SEP 800.0 74 957.6 88 663.7 61 1086 789 142.96 84
OCT-SEP 1015.3 75 1172.9 86 878.9 65 1358
TETON - NEAR ST. ANTHONY APR-AUG 314.6 76 450.4 109 258.5 63 412 312
APR-JUL 276.8 75 401.2 109 219.5 60 368 283
APR-SEP 352.4 79 490.1 110 289.0 65 447 335
JAN-JUL 349.8 78 472.1 105 292.8 65 448 354 40.21 96
JAN-SEP 424.0 81 562.0 107 362.3 69 526 407 40.21 96
OCT-SEP 502.5 82 640.5 104 440.8 72 614
HENRYS FORK - AT REXBURG APR-AUG 940.0 61 1195.6 78 717.8 47 1536 1040
APR-JUL 851.5 64 1086.2 81 643.0 48 1335 924
APR-SEP 1044.4 61 1303.1 76 801.7 47 1710 1147
JAN-JUL 1157.0 67 1395.9 81 966.0 56 1721 1254 174.25 79
JAN-SEP 1344.9 64 1611.8 77 1123.1 54 2096 1477 174.25 79
OCT-SEP 1665.9 66 1932.8 76 1444.1 57 2527
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
WILLOW CREEK - NEAR RIRIE APR-AUG 52.0 88 93.3 158 27.3 46 59 36
APR-JUL 52.0 89 91.3 157 27.2 47 58 35
APR-SEP 53.0 88 95.3 158 27.7 46 60 37
JAN-JUL 62.8 91 101.8 148 39.5 57 69 46 4.20 90
JAN-SEP 63.6 90 106.3 150 40.0 56 71 48 4.20 90
OCT-SEP 72.7 92 115.4 147 49.1 62 79
SNAKE - NEAR SHELLEY APR-AUG 3776.2 84 4829.7 107 3140.6 69 4520 3268
APR-JUL 3459.3 85 4387.1 107 2875.7 70 4090 3015
APR-SEP 4090.6 83 5195.9 106 3390.2 69 4905 3539
JAN-JUL 4302.9 89 5281.6 109 3775.7 78 4841 3825 482.13 112
JAN-SEP 5000.5 88 6085.2 108 4301.1 76 5656 4349 482.13 112
OCT-SEP 5879.2 89 6963.8 105 5179.8 78 6605
PORTNEUF - AT TOPAZ APR-AUG 41.9 63 57.2 86 32.2 49 66 55
APR-JUL 36.1 63 49.4 86 27.3 47 58 47
APR-SEP 47.2 65 64.5 89 36.9 51 72 61
JAN-JUL 63.5 76 76.4 92 54.4 65 83 74 13.94 104
JAN-SEP 76.0 78 92.2 94 64.1 65 98 88 13.94 104
OCT-SEP 97.4 83 113.6 96 85.6 73 118
SNAKE - AT AMERICAN FALLS DAM APR-AUG 1906.8 75 2994.2 118 1221.5 48 2531 1100
APR-JUL 1954.6 77 2907.2 115 1310.5 52 2529 1248
APR-SEP 1982.7 76 3141.5 120 1268.1 48 2624 1124
JAN-JUL 3062.6 84 4026.6 110 2428.1 67 3651 2268 582.46 89
JAN-SEP 3116.3 83 4253.4 114 2385.7 64 3745 2144 582.46 89
OCT-SEP 4203.6 86 5340.6 109 3473.0 71 4883
SALMON FALLS CREEK - NR SAN JACINTO APR-AUG 30.9 47 62.1 94 17.9 27 66 35
APR-JUL 29.9 46 60.5 94 17.4 27 65 35
APR-SEP 32.2 47 64.2 95 19.4 29 68 37
JAN-JUL 48.4 56 76.2 88 33.6 39 87 53 6.67 72
JAN-SEP 51.6 57 80.1 89 35.6 40 90 55 6.67 72
OCT-SEP 61.1 61 89.5 90 45.1 45 100
BIG LOST - AT HOWELL RANCH NEAR CHILLY APR-AUG 212.0 129 293.8 178 148.9 90 165 109
APR-JUL 198.3 129 274.7 178 139.5 91 154 103
APR-SEP 220.5 128 304.1 177 155.5 91 172 113
JAN-JUL 215.0 128 291.3 173 156.6 93 168 117 10.63 134
JAN-SEP 237.1 128 320.7 173 172.6 93 186 127 10.63 134
OCT-SEP 255.1 125 338.7 166 190.7 93 204
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
BIG LOST - MACKAY RESERVOIR NEAR MACKAY APR-AUG 190.6 151 267.0 212 131.8 105 126 79
APR-JUL 173.9 153 243.7 215 121.7 107 113 69
APR-SEP 202.7 149 281.8 207 140.9 103 136 94
JAN-JUL 203.2 144 269.1 190 148.5 105 141 94 14.64 89
JAN-SEP 230.0 140 307.3 187 167.7 102 164 119 14.64 89
OCT-SEP 259.8 132 337.0 171 197.4 100 197
BIG WOOD - AT HAILEY APR-AUG 242.1 98 315.7 128 169.0 69 246 164
APR-JUL 228.0 98 295.1 127 157.8 68 232 157
APR-SEP 254.6 99 330.2 128 179.4 70 257 171
JAN-JUL 261.5 99 327.1 124 198.9 76 263 185 18.48 114
JAN-SEP 289.8 100 362.2 125 220.5 76 289 199 18.48 114
OCT-SEP 321.0 100 393.4 122 251.7 78 321
BIG WOOD - MAGIC DAM APR-AUG 189.3 81 311.9 133 110.0 47 235 131
APR-JUL 184.0 81 299.4 132 107.7 48 227 123
APR-SEP 196.0 82 321.4 134 113.7 47 240 134
JAN-JUL 240.0 88 346.2 127 156.2 57 273 186 15.92 132
JAN-SEP 252.5 88 368.2 129 162.0 57 286 197 15.92 132
OCT-SEP 271.4 88 387.1 126 180.9 59 307
LITTLE WOOD - NEAR CAREY APR-AUG 80.3 108 133.5 180 49.4 66 74 34
APR-JUL 77.7 109 127.7 179 47.6 67 71 33
APR-SEP 83.2 109 138.4 181 50.8 66 77 34
JAN-JUL 99.2 112 141.9 160 68.8 78 89 45 7.62 118
JAN-SEP 104.3 111 152.6 163 71.8 77 94 46 7.62 118
OCT-SEP 115.8 111 164.1 158 83.3 80 104
SNAKE - AT KING HILL APR-AUG 2210.0 76 2988.7 102 1900.1 65 2925 2143
APR-JUL 1771.1 72 2547.1 104 1525.7 62 2450 1751
APR-SEP 2692.0 79 3438.1 101 2298.6 67 3412 2575
JAN-JUL 2887.4 70 4009.9 97 2600.1 63 4129 2848 629.92 67
JAN-SEP 3828.6 75 4901.0 96 3398.0 67 5090 3672 629.92 67
OCT-SEP 5058.8 76 6131.1 93 4628.1 70 6626
BRUNEAU - NEAR HOT SPRINGS APR-AUG 96.3 54 149.5 83 56.8 32 180 118
APR-JUL 94.1 54 144.8 82 56.3 32 176 115
APR-SEP 98.3 54 154.4 84 58.2 32 183 121
JAN-JUL 129.7 60 176.9 82 90.8 42 217 165 10.56 63
JAN-SEP 134.1 60 186.5 83 92.8 41 225 171 10.56 63
OCT-SEP 150.9 62 203.3 84 109.6 45 242
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SNAKE - BELOW SWAN FALLS APR-AUG 2393.5 85 3208.0 114 2104.9 75 2812 1913
APR-JUL 1964.0 82 2766.2 115 1711.1 71 2405 1588
APR-SEP 2939.8 90 3682.0 113 2530.8 78 3258 2321
JAN-JUL 3178.2 76 4329.6 104 2914.3 70 4166 2798 670.66 68
JAN-SEP 4171.1 83 5245.0 104 3746.1 75 5020 3531 670.66 68
OCT-SEP 5456.6 83 6530.5 99 5031.7 76 6584
OWYHEE - OWYHEE DAM APR-AUG 137.8 43 383.4 119 73.7 23 321 228
APR-JUL 131.8 43 370.6 121 70.5 23 307 211
APR-SEP 143.6 43 394.1 117 78.6 23 336 242
JAN-JUL 307.4 56 589.5 108 207.9 38 547 597 36.28 41
JAN-SEP 325.3 57 618.9 108 218.6 38 575 628 36.28 41
OCT-SEP 381.3 60 674.8 105 274.6 43 641
SF BOISE - ANDERSON RANCH DAM APR-AUG 345.0 72 449.9 94 229.7 48 480 429
APR-JUL 333.0 72 434.9 94 220.7 48 462 410
APR-SEP 360.3 73 463.7 94 238.1 48 495 443
JAN-JUL 421.6 77 561.5 102 322.1 59 550 489 50.35 135
JAN-SEP 443.2 76 590.0 101 339.2 58 583 521 50.35 135
OCT-SEP 525.1 82 672.0 105 421.2 66 637
BOISE - LUCKY PEAK DAM APR-AUG 844.8 66 1141.0 89 545.1 42 1284 1163
APR-JUL 807.8 66 1084.0 88 516.5 42 1232 1121
APR-SEP 888.2 67 1186.7 89 574.7 43 1329 1202
JAN-JUL 1121.8 72 1476.2 94 833.0 53 1566 1440 144.46 106
JAN-SEP 1202.4 72 1576.2 95 891.4 54 1663 1521 144.46 106
OCT-SEP 1431.3 78 1805.1 99 1120.3 61 1829
BOISE - NEAR PARMA APR-AUG 427.0 80 513.6 97 342.9 65 531 389
APR-JUL 382.2 79 461.6 95 340.3 70 486 351
APR-SEP 444.8 76 572.4 98 361.0 62 584 442
JAN-JUL 550.0 72 643.0 84 508.1 67 761 620 86.04 65
JAN-SEP 612.6 71 749.8 87 528.5 62 859 712 86.04 65
OCT-SEP 772.3 75 909.5 89 688.2 67 1023
MALHEUR - NEAR DREWSEY APR-AUG 20.3 32 42.3 66 13.4 21 64 116
APR-JUL 20.3 32 41.2 65 13.2 21 64 115
APR-SEP 21.1 33 43.7 67 13.9 21 65 117
JAN-JUL 56.8 49 87.7 76 44.0 38 116 264 9.80 56
JAN-SEP 57.9 49 90.3 77 44.6 38 117 266 9.80 56
OCT-SEP 72.2 55 104.6 80 58.9 45 130
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
NF MALHEUR - AT BEULAH APR-AUG 25.2 45 48.1 85 17.9 32 57 76
APR-JUL 24.2 45 46.0 86 16.8 31 54 74
APR-SEP 26.6 45 50.3 85 19.0 32 59 78
JAN-JUL 48.3 58 76.0 91 39.2 47 84 138 7.72 72
JAN-SEP 50.7 57 80.6 90 41.5 47 89 143 7.72 72
OCT-SEP 62.4 62 92.3 92 53.2 53 101
DEADWOOD - BELOW DEADWOOD RES APR-AUG 106.0 81 133.9 102 81.8 62 131 128
APR-JUL 102.7 82 130.4 104 79.6 64 125 126
APR-SEP 108.8 81 136.7 101 83.8 62 135 132
JAN-JUL 128.7 90 162.0 114 105.1 74 143 142 14.02 157
JAN-SEP 135.1 89 168.7 111 110.4 72 153 147 14.02 157
OCT-SEP 160.1 95 193.7 115 135.4 81 168
NF PAYETTE - CASCADE DAM APR-AUG 406.0 86 549.3 117 294.7 63 470 452
APR-JUL 387.3 84 527.9 114 285.0 62 463 444
APR-SEP 424.1 87 567.9 117 305.7 63 487 466
JAN-JUL 551.4 96 682.5 118 429.0 74 576 554 84.29 160
JAN-SEP 587.0 98 713.0 119 452.2 75 600 576 84.29 160
OCT-SEP 715.6 104 841.6 123 580.8 85 685
PAYETTE - NEAR HORSESHOE BEND APR-AUG 1233.0 80 1617.0 105 934.7 61 1540 1567
APR-JUL 1183.2 80 1552.4 105 894.8 60 1484 1515
APR-SEP 1278.1 80 1671.3 105 975.3 61 1597 1622
JAN-JUL 1626.1 88 2076.9 112 1318.9 71 1854 1892 229.50 140
JAN-SEP 1736.5 88 2192.4 111 1418.1 72 1968 2000 229.50 140
OCT-SEP 2086.1 94 2542.0 115 1767.7 80 2208
PAYETTE - NEAR EMMETT APR-AUG 1035.9 81 1448.0 113 704.7 55 1277 1291
APR-JUL 938.6 80 1337.2 113 616.0 52 1179 1171
APR-SEP 1110.2 84 1529.5 115 777.4 59 1325 1333
JAN-JUL 1336.9 84 1840.6 116 1001.3 63 1589 1642 186.90 101
JAN-SEP 1516.5 87 2031.1 117 1161.1 67 1736 1804 186.90 101
OCT-SEP 1765.0 91 2279.6 117 1409.6 72 1947
WEISER - NEAR WEISER APR-AUG 256.9 68 377.8 100 177.9 47 380 373
APR-JUL 241.4 66 360.4 99 163.1 45 365 359
APR-SEP 267.7 69 390.6 100 188.9 49 389 382
JAN-JUL 442.7 69 622.9 97 334.7 52 645 757 87.68 82
JAN-SEP 468.9 70 650.2 97 359.6 54 669 780 87.68 82
OCT-SEP 541.0 74 722.4 99 431.7 59 726
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SNAKE - AT WEISER APR-AUG 4621.5 87 5864.1 110 3585.3 68 5311 4346
APR-JUL 3981.6 84 5188.0 110 3061.8 65 4718 3817
APR-SEP 5318.4 89 6578.9 110 4193.9 70 5956 4961
JAN-JUL 6181.1 80 7437.4 96 5129.6 66 7719 6890 1127.85 72
JAN-SEP 7531.1 84 8812.6 98 6268.5 70 8957 8035 1127.85 72
OCT-SEP 9528.7 85 10810.2 97 8266.1 74 11199
BURNT - Unity Dam & Burnt RVR NR Hereford APR-AUG 9.7 32 23.7 78 5.6 19 30 38
APR-JUL 9.7 33 23.6 80 5.3 18 30 38
APR-SEP 9.9 32 24.0 77 5.8 19 31 39
JAN-JUL 22.8 45 36.9 74 17.4 35 50 70 5.23 77
JAN-SEP 23.2 45 38.2 74 17.7 34 51 72 5.23 77
OCT-SEP 31.0 54 46.0 80 25.4 44 58
EAGLE CREEK - ABOVE SKULL CK APR-AUG 98.3 58 131.9 78 69.7 41 169 185
APR-JUL 92.9 58 125.2 78 65.0 40 161 178
APR-SEP 102.7 59 136.9 79 73.5 42 174 190
JAN-JUL 127.0 68 162.5 87 96.5 51 188 205 14.02 111
JAN-SEP 137.4 68 174.5 87 105.2 52 201 218 14.02 111
OCT-SEP 162.1 73 199.1 90 129.8 59 221
SNAKE - BROWNLEE DAM APR-AUG 4948.3 86 6240.8 109 3798.6 66 5736 4812
APR-JUL 4281.2 84 5543.7 108 3261.3 64 5125 4267
APR-SEP 5628.6 88 6976.6 109 4429.6 69 6398 5436
JAN-JUL 6727.3 81 8036.6 97 5571.8 67 8326 7650 1253.03 76
JAN-SEP 8085.5 84 9468.7 99 6735.9 70 9600 8819 1253.03 76
OCT-SEP 10177.7 85 11560.9 97 8828.0 74 11906
SNAKE - AT HELLS CANYON DAM APR-AUG 4948.3 82 6240.8 103 3798.6 63 6046 5036
APR-JUL 4281.2 79 5543.7 102 3261.3 60 5429 4486
APR-SEP 5628.6 84 6976.6 104 4429.6 66 6725 5670
JAN-JUL 6741.3 76 8050.6 91 5585.8 63 8834 7970 1266.26 72
JAN-SEP 8099.6 80 9482.8 94 6749.9 67 10130 9154 1266.26 72
OCT-SEP 10214.3 82 11597.5 93 8864.6 71 12500
IMNAHA - AT IMNAHA APR-AUG 220.2 82 304.1 113 135.5 50 269 235
APR-JUL 211.2 82 292.1 113 127.1 49 258 226
APR-SEP 227.7 82 312.7 113 142.6 51 277 242
JAN-JUL 274.8 87 358.7 114 195.5 62 315 283 24.99 108
JAN-SEP 292.0 87 379.1 113 211.2 63 334 299 24.99 108
OCT-SEP 328.5 90 415.6 113 247.7 68 366
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
SALMON - AT SALMON APR-AUG 790.1 91 1141.9 131 615.8 71 873 696
APR-JUL 732.8 90 1052.1 130 572.4 71 810 647
APR-SEP 844.4 91 1217.5 131 665.6 72 929 745
JAN-JUL 939.8 93 1258.7 125 767.4 76 1008 837 118.34 106
JAN-SEP 1051.5 93 1422.8 126 860.5 76 1126 935 118.34 106
OCT-SEP 1280.9 95 1652.3 123 1090.0 81 1346
SALMON - AT WHITEBIRD APR-AUG 4559.4 77 5902.1 100 3497.8 59 5917 4961
APR-JUL 4275.0 76 5577.3 99 3260.7 58 5614 4730
APR-SEP 4805.3 78 6175.9 100 3714.7 60 6158 5162
JAN-JUL 5332.8 81 6642.7 101 4447.3 68 6555 5601 566.16 120
JAN-SEP 5873.9 83 7265.0 102 4904.5 69 7099 6032 566.16 120
OCT-SEP 6888.7 87 8279.8 104 5919.2 74 7958
GRANDE RONDE - NEAR PERRY APR-AUG 96.6 55 215.0 123 30.4 17 174 82
APR-JUL 95.4 55 211.1 123 30.1 17 172 82
APR-SEP 97.8 56 220.0 125 31.1 18 176 83
JAN-JUL 141.3 52 261.6 97 72.4 27 271 205 15.87 43
JAN-SEP 143.7 52 270.0 99 74.5 27 274 206 15.87 43
OCT-SEP 160.9 55 287.2 99 91.6 32 291
LOSTINE - NR LOSTINE APR-AUG 76.3 68 99.9 88 50.8 45 113 88
APR-JUL 72.7 67 94.7 88 49.0 45 108 85
APR-SEP 77.9 67 102.0 88 53.0 46 116 90
JAN-JUL 86.2 73 106.3 89 61.6 52 119 93 6.95 126
JAN-SEP 90.0 71 113.5 90 65.9 52 126 99 6.95 126
OCT-SEP 102.5 75 125.9 92 78.4 57 137
GRANDE RONDE - TROY APR-AUG 819.3 63 1241.5 96 478.4 37 1293 936
APR-JUL 782.0 62 1186.2 95 451.0 36 1251 906
APR-SEP 852.2 64 1285.5 97 503.7 38 1331 965
JAN-JUL 1308.8 70 1714.2 92 979.2 52 1872 1557 210.19 76
JAN-SEP 1396.4 72 1809.9 93 1031.1 53 1952 1616 210.19 76
OCT-SEP 1650.9 76 2064.4 95 1285.6 59 2170
SNAKE - LOWER GRANITE DAM APR-AUG 15870.3 75 18990.0 90 12201.4 58 21121 16674
APR-JUL 14727.8 74 17693.2 89 11234.4 56 19946 15809
APR-SEP 16924.1 76 20321.1 91 13236.0 60 22232 17594
JAN-JUL 21795.6 79 25137.5 92 17979.8 66 27450 22893 3250.61 90
JAN-SEP 24108.8 81 27509.0 93 19905.6 67 29736 24677 3250.61 90
OCT-SEP 29345.4 86 32745.7 96 25142.2 73 34287
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
CLEARWATER - AT OROFINO APR-AUG 3552.4 78 4299.2 95 2750.0 61 4539 3507
APR-JUL 3455.7 78 4164.4 94 2659.0 60 4417 3422
APR-SEP 3638.8 79 4399.1 95 2817.5 61 4632 3573
JAN-JUL 4734.8 86 5568.9 101 3956.3 72 5531 4453 621.78 124
JAN-SEP 4941.2 86 5781.6 101 4106.2 71 5745 4603 621.78 124
OCT-SEP 5933.8 94 6774.2 107 5098.8 81 6313
NF CLEARWATER - DWORSHAK DAM APR-AUG 1877.9 74 2308.2 90 1429.1 56 2554 1819
APR-JUL 1816.2 73 2234.1 90 1373.4 56 2474 1768
APR-SEP 1929.1 74 2366.6 90 1477.9 56 2620 1857
JAN-JUL 2862.9 84 3410.3 100 2489.4 73 3397 2620 521.57 124
JAN-SEP 2971.2 84 3552.8 100 2594.4 73 3543 2708 521.57 124
OCT-SEP 3856.6 96 4438.2 111 3479.8 87 3998
CLEARWATER - AT SPALDING APR-AUG 5555.6 76 6710.1 92 4275.5 58 7319 5441
APR-JUL 5352.0 75 6479.8 91 4127.1 58 7117 5295
APR-SEP 5701.3 76 6873.9 92 4396.4 59 7481 5552
JAN-JUL 7958.5 84 9493.4 101 6776.1 72 9421 7403 1230.73 118
JAN-SEP 8350.5 85 9904.0 101 7025.1 72 9785 7660 1230.73 118
OCT-SEP 10283.5 95 11837.0 109 8958.1 83 10841
COLUMBIA - MCNARY DAM APR-AUG 80040.0 91 88326.1 100 68182.6 77 88088 65657
APR-JUL 72072.6 89 80552.3 100 61929.6 77 80726 60057
APR-SEP 85094.4 92 94323.8 102 73655.1 79 92790 69577
JAN-JUL 92091.6 92 100834.5 101 82120.8 82 99964 76729 10096.41 105
JAN-SEP 103697.3 93 114664.4 102 92583.1 83 112028 86249 10096.41 105
OCT-SEP 121838.4 96 132806.2 105 110724.2 87 126785
UMATILLA - NEAR GIBBON APR-AUG 45.9 57 69.1 87 27.2 34 80 54
APR-JUL 43.3 56 66.0 86 24.8 32 77 51
APR-SEP 48.2 58 71.8 87 29.4 36 82 58
JAN-JUL 97.2 67 123.8 86 77.5 54 145 130 24.88 72
JAN-SEP 102.1 68 129.4 86 81.9 55 150 137 24.88 72
OCT-SEP 131.9 76 159.3 91 111.7 64 174
UMATILLA - AT PENDLETON APR-AUG 75.5 49 131.5 85 38.4 25 155 88
APR-JUL 74.7 49 129.0 85 38.0 25 152 86
APR-SEP 76.6 49 134.2 85 39.2 25 158 90
JAN-JUL 168.8 52 238.8 73 125.2 38 326 281 40.85 47
JAN-SEP 170.8 52 243.7 74 126.3 38 331 286 40.85 47
OCT-SEP 229.0 60 301.9 79 184.5 49 380
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
NF JOHN DAY - AT MONUMENT APR-AUG 225.2 40 416.2 75 91.8 16 558 499
APR-JUL 219.9 40 407.0 74 90.7 16 551 494
APR-SEP 231.2 41 423.9 75 94.4 17 564 505
JAN-JUL 383.0 44 577.2 66 234.4 27 869 1042 65.96 51
JAN-SEP 390.6 44 591.0 67 238.5 27 883 1053 65.96 51
OCT-SEP 465.8 49 666.2 71 313.7 33 945
JOHN DAY - AT SERVICE CK APR-AUG 295.1 37 534.7 68 158.4 20 790 757
APR-JUL 294.3 38 529.9 68 158.3 20 781 748
APR-SEP 300.7 38 540.8 68 159.8 20 798 767
JAN-JUL 538.2 43 810.4 64 391.4 31 1262 1629 109.40 54
JAN-SEP 545.3 43 822.7 64 391.8 31 1279 1648 109.40 54
OCT-SEP 663.0 48 940.4 68 509.4 37 1392
COLUMBIA - JOHN DAY DAM APR-AUG 81447.7 93 89841.3 103 69508.4 79 87643 67401
APR-JUL 73411.4 91 82015.3 102 63173.2 78 80636 61843
APR-SEP 86726.5 94 95908.4 104 75029.9 81 92354 71335
JAN-JUL 95225.7 94 103913.2 103 84780.3 84 101178 80095 10958.38 106
JAN-SEP 106625.0 94 117772.4 104 95376.7 84 112896 89587 10958.38 106
OCT-SEP 125784.9 98 136932.1 107 114536.6 89 128295
DESCHUTES - AT MOODY NR BIGGS APR-AUG 1455.3 89 1506.6 92 1418.7 87 1637 1513
APR-JUL 1198.2 88 1245.3 91 1163.8 85 1365 1259
APR-SEP 1705.6 90 1760.5 93 1667.6 88 1902 1775
JAN-JUL 2130.1 82 2209.4 85 2095.0 81 2590 2631 470.83 65
JAN-SEP 2637.1 84 2724.9 87 2599.3 83 3127 3147 470.83 65
OCT-SEP 3555.6 86 3643.5 88 3517.8 85 4118
COLUMBIA - THE DALLES DAM APR-AUG 81698.6 92 90158.8 101 69750.9 78 89196 67993
APR-JUL 73571.3 90 82230.9 100 63334.0 77 81933 62272
APR-SEP 87171.5 93 96402.9 102 75441.9 80 94166 72162
JAN-JUL 95712.4 92 104445.1 101 85256.2 82 103714 81428 11098.37 100
JAN-SEP 107362.8 93 118592.4 102 96099.2 83 115946 91317 11098.37 100
OCT-SEP 127248.3 96 138477.6 105 115984.7 88 132314
COLUMBIA - BONNEVILLE DAM APR-AUG 82550.5 92 91231.6 101 70550.3 78 90174 67995
APR-JUL 74313.9 90 83213.9 101 64068.5 77 82678 62214
APR-SEP 88135.4 93 97590.5 103 76322.3 80 95202 72318
JAN-JUL 97107.2 92 106055.8 101 86547.2 82 105246 82523 11295.73 98
JAN-SEP 108859.5 92 120360.7 102 97521.1 83 117770 92627 11295.73 98
OCT-SEP 129809.1 96 141310.9 105 118470.6 88 134527
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
MCKENZIE - NEAR VIDA APR-AUG 759.8 70 1009.1 92 667.1 61 1091 891
APR-JUL 646.3 66 879.9 90 562.2 57 978 760
APR-SEP 863.8 72 1125.7 94 763.1 64 1195 995
JAN-JUL 1221.9 61 1499.6 75 1137.8 57 2001 1924 336.81 55
JAN-SEP 1435.7 65 1747.7 79 1352.8 61 2219 2160 336.81 55
OCT-SEP 2038.3 69 2350.2 80 1955.4 66 2951
NORTH SANTIAM - AT MEHAMA APR-AUG 586.8 73 828.8 103 437.6 55 802 501
APR-JUL 544.9 72 778.2 103 397.9 53 753 461
APR-SEP 634.3 74 881.4 103 472.4 55 855 539
JAN-JUL 1213.6 71 1540.1 90 1054.5 62 1703 1440 344.05 59
JAN-SEP 1307.1 72 1633.7 91 1134.1 63 1805 1518 344.05 59
OCT-SEP 2114.3 84 2440.8 97 1941.3 77 2522
SOUTH SANTIAM - AT WATERLOO APR-AUG 440.1 77 722.3 126 266.2 47 571 297
APR-JUL 420.9 75 696.4 125 255.0 46 558 287
APR-SEP 457.1 77 739.4 125 275.6 47 590 307
JAN-JUL 1027.5 70 1366.8 93 827.4 57 1462 1269 263.17 47
JAN-SEP 1065.8 71 1419.7 95 849.5 57 1494 1289 263.17 47
OCT-SEP 1639.8 76 1993.7 93 1423.5 66 2146
WILLAMETTE - AT SALEM APR-AUG 3283.6 72 5266.6 116 2215.2 49 4539 3194
APR-JUL 3145.2 73 5053.1 117 2110.6 49 4324 3012
APR-SEP 3486.8 73 5461.9 115 2327.2 49 4754 3379
JAN-JUL 7712.3 67 10033.5 88 6537.5 57 11461 11343 2188.31 49
JAN-SEP 8010.1 67 10445.0 88 6755.8 57 11890 11710 2188.31 49
OCT-SEP 11570.3 71 14005.1 86 10316.0 63 16315
CLACKAMAS - AT ESTACADA APR-AUG 469.4 69 671.4 99 372.2 55 677 464
APR-JUL 427.6 69 617.8 99 333.3 53 624 426
APR-SEP 523.4 71 720.9 98 406.3 55 733 505
JAN-JUL 913.3 68 1158.3 86 791.0 59 1341 1108 227.79 52
JAN-SEP 998.3 69 1258.8 87 874.5 60 1450 1187 227.79 52
OCT-SEP 1541.9 78 1802.4 91 1418.0 72 1975
LEWIS - MERWIN DAM APR-AUG 796.3 82 1089.0 112 590.5 61 969 714
APR-JUL 744.5 84 1038.6 118 552.3 63 881 664
APR-SEP 884.0 82 1143.5 106 631.5 58 1082 757
JAN-JUL 1839.2 85 2230.8 103 1563.3 72 2162 1800 572.54 70
JAN-SEP 1928.3 82 2331.7 99 1632.2 69 2363 1893 572.54 70
OCT-SEP 3213.1 94 3616.4 106 2916.9 85 3417
---------------------Forecast --------------------- ----------Runoff-----------
River Basin Period Probable % Maximum % Minimum % Average PrevYR CurYR %
COWLITZ - MAYFIELD RESERVOIR APR-AUG 1291.6 73 1777.5 101 994.4 56 1765 1175
APR-JUL 1197.5 73 1659.4 101 918.5 56 1648 1088
APR-SEP 1371.5 74 1952.9 105 1053.3 56 1864 1240
JAN-JUL 2365.8 74 3086.4 96 2089.7 65 3204 2336 696.74 71
JAN-SEP 2511.9 73 3279.1 96 2272.5 66 3420 2488 696.74 71
OCT-SEP 4454.3 96 5221.6 113 4214.9 91 4624
COWLITZ - AT CASTLE ROCK APR-AUG 1749.3 74 2493.7 105 1330.2 56 2366 1508
APR-JUL 1613.2 73 2336.1 106 1227.8 55 2213 1394
APR-SEP 1852.4 74 2696.1 108 1402.9 56 2504 1590
JAN-JUL 3716.1 80 4778.9 103 3307.6 71 4638 3336 1349.43 89
JAN-SEP 3946.8 80 5083.1 103 3545.0 72 4929 3532 1349.43 89
OCT-SEP 6758.7 100 7894.9 117 6356.9 94 6739
ROGUE - AT RAYGOLD APR-AUG 489.1 64 724.8 96 370.0 49 759 757
APR-JUL 430.5 63 653.7 95 318.0 46 687 681
APR-SEP 548.0 66 789.6 95 416.6 50 831 833
JAN-JUL 923.6 64 1225.8 85 759.1 53 1442 1832 219.75 49
JAN-SEP 1034.9 65 1368.0 86 854.5 54 1586 1984 219.75 49
OCT-SEP 1369.6 67 1702.6 84 1189.1 59 2032
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