Header for Water Supply Runoff Summary Page
20260424
   
        Friday, April 24, 2026    
Click to show table
Columbia Basin Runoff Report

Columbia Basin RUNOFF - Water Year 2026

KAF (Thousand Acre-Feet)

30 Year Average Based on 1991-2020
Columbia River - Mica Dam (MCDQ2W) [122280000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MCDQ2W 2026/04/24 2026 502.8 546.1 381.3 362.7 227.3 257.5 529.9 2807.7 1517.5 502.8
AVERAGE MCDQ2W 2026/04/24 2026 349.4 654.8 428.5 306.9 279.5 229.0 275.3 545.7 1963.6 3293.0 3261.9 2101.8 1129.7 2523.5 1133.2 349.4
PCT AVG MCDQ2W 2026/04/24 2026 143.9 83.4 89.0 118.2 81.3 112.4 192.5 111.3 133.9 143.9
Columbia River - Revelstoke Dam (REVQ2W) [122300001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF REVQ2W 2026/04/24 2026 802.8 755.1 628.1 605.9 378.8 386.6 768.0 4325.4 2336.2 802.8
AVERAGE REVQ2W 2026/04/24 2026 554.3 944.5 648.7 435.5 377.3 301.1 387.9 875.2 3052.9 4727.9 4390.0 2700.4 1494.6 3649.3 1620.6 554.3
PCT AVG REVQ2W 2026/04/24 2026 144.8 80.0 96.8 139.2 100.4 128.4 198.0 118.5 144.2 144.8
Columbia River - Arrow Lakes-Hugh Keenleyside Dam (ARDQ2W) [122410001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ARDQ2W 2026/04/24 2026 1330.7 1011.2 1013.3 1026.5 757.2 688.7 1375.9 7203.6 4152.5 1330.7
AVERAGE ARDQ2W 2026/04/24 2026 1014.3 1328.8 1034.1 742.8 659.8 529.6 723.6 1562.2 4833.6 6685.3 5697.9 3356.3 1923.6 6033.1 2927.3 1014.3
PCT AVG ARDQ2W 2026/04/24 2026 131.2 76.1 98.0 138.2 114.8 130.1 190.2 119.4 141.9 131.2
Kootenai River - Libby Dam (LYDM8W) [123019330 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LYDM8W 2026/04/24 2026 569.2 185.8 304.2 458.2 329.9 214.9 560.8 2623.0 1674.7 569.2
AVERAGE LYDM8W 2026/04/24 2026 357.1 330.1 313.0 251.8 210.8 185.1 259.0 556.3 1737.4 2135.2 1141.1 509.8 349.6 1906.8 1012.0 357.1
PCT AVG LYDM8W 2026/04/24 2026 159.4 56.3 97.2 182.0 156.5 116.1 216.5 137.6 165.5 159.4
Kootenai River - at Leonia (LEOI1W) [123050001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LEOI1W 2026/04/24 2026 808.9 214.0 420.4 932.4 523.3 334.7 881.8 4115.5 2548.7 808.9
AVERAGE LEOI1W 2026/04/24 2026 606.6 381.7 392.3 326.9 292.5 284.5 439.9 908.3 2262.9 2440.1 1246.6 551.5 393.2 2724.3 1623.5 606.6
PCT AVG LEOI1W 2026/04/24 2026 133.4 56.1 107.2 285.2 178.9 117.6 200.5 151.1 157.0 133.4
Kootenai River - at Bonners Ferry (BFEI1W) [123095001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BFEI1W 2026/04/24 2026 959.2 246.6 464.9 1025.1 585.7 352.2 976.1 4609.9 2873.3 959.2
AVERAGE BFEI1W 2026/04/24 2026 687.4 393.9 411.8 353.4 310.7 305.3 482.9 1034.7 2552.6 2614.0 1293.7 565.7 402.1 2945.3 1786.2 687.4
PCT AVG BFEI1W 2026/04/24 2026 139.5 62.6 112.9 290.1 188.5 115.4 202.2 156.5 160.9 139.5
Duncan River - Duncan Dam (DCDQ2W) [123224101 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF DCDQ2W 2026/04/24 2026 119.0 57.8 74.9 76.5 65.5 44.0 124.0 561.7 352.5 119.0
AVERAGE DCDQ2W 2026/04/24 2026 76.3 113.7 83.5 62.0 55.0 34.4 46.9 126.2 451.8 595.0 539.7 327.1 184.3 471.8 212.6 76.3
PCT AVG DCDQ2W 2026/04/24 2026 156.0 50.8 89.7 123.4 119.0 127.8 264.4 119.1 165.8 156.0
Kootenai River - Kootenay L at Queens Bay (QBYQ2W) [123227201 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF QBYQ2W 2026/04/24 2026 1490.3 376.1 764.7 1506.3 891.7 591.1 1553.1 7173.4 4526.4 1490.3
AVERAGE QBYQ2W 2026/04/24 2026 1121.2 733.1 759.7 631.3 566.8 532.8 814.5 1708.7 4593.1 4859.1 2674.6 1216.7 788.9 5159.4 3035.3 1121.2
PCT AVG QBYQ2W 2026/04/24 2026 132.9 51.3 100.7 238.6 157.3 110.9 190.7 139.0 149.1 132.9
Slocan River - near Crescent Valley (SLCQ2W) [123229000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SLCQ2W 2026/04/24 2026 167.8 36.3 62.0 97.2 90.6 63.3 143.2 660.3 464.9 167.8
AVERAGE SLCQ2W 2026/04/24 2026 107.7 85.6 90.2 72.3 57.9 51.6 73.5 164.0 521.0 649.8 373.5 141.6 82.7 538.8 290.7 107.7
PCT AVG SLCQ2W 2026/04/24 2026 155.8 42.3 68.8 134.4 156.4 122.7 194.9 122.6 159.9 155.8
Columbia River - at Birchbank (BIRQ2W) [123230001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BIRQ2W 2026/04/24 2026 3111.4 1413.7 1799.8 2719.8 1846.7 1439.4 3159.3 15490.1 9556.8 3111.4
AVERAGE BIRQ2W 2026/04/24 2026 2305.6 2188.3 1921.1 1501.9 1327.6 1179.2 1689.2 3527.0 10151.4 12411.2 8870.3 4775.9 2840.9 12112.9 6501.6 2305.6
PCT AVG BIRQ2W 2026/04/24 2026 134.9 64.6 93.7 181.1 139.1 122.1 187.0 127.9 147.0 134.9
Blackfoot River - near Bonner (BONM8W) [123400000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BONM8W 2026/04/24 2026 182.1 24.7 25.7 79.7 60.1 45.4 135.1 552.8 422.6 182.1
AVERAGE BONM8W 2026/04/24 2026 99.3 35.9 38.7 34.7 33.7 34.1 58.0 150.6 318.1 249.2 93.2 44.1 35.6 334.4 225.1 99.3
PCT AVG BONM8W 2026/04/24 2026 183.5 68.9 66.5 229.7 178.3 133.0 232.7 165.3 187.7 183.5
Clark Fork River - above Blackfoot (ABBM8W) [123404500 Estimated Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ABBM8W 2026/04/24 2026 96.2 37.9 38.7 66.9 54.4 42.1 99.4 435.6 292.1 96.2
AVERAGE ABBM8W 2026/04/24 2026 72.2 54.3 52.7 47.4 47.5 47.2 66.6 102.9 200.4 203.0 88.0 42.8 42.7 387.9 233.5 72.2
PCT AVG ABBM8W 2026/04/24 2026 133.3 69.9 73.4 141.1 114.4 89.3 149.2 112.3 125.1 133.3
Clark Fork River - above Missoula (ABOM8W) [123405000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ABOM8W 2026/04/24 2026 278.3 62.7 64.4 146.6 114.5 87.5 234.5 988.4 714.8 278.3
AVERAGE ABOM8W 2026/04/24 2026 171.4 90.2 91.4 82.1 81.2 81.3 124.7 253.4 518.5 452.2 181.2 86.9 78.3 722.3 458.6 171.4
PCT AVG ABOM8W 2026/04/24 2026 162.3 69.5 70.5 178.5 140.9 107.6 188.1 136.8 155.8 162.3
Bitterroot River - near Darby (DARM8W) [123440000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF DARM8W 2026/04/24 2026 79.5 12.5 17.8 32.7 24.5 21.4 61.2 249.7 186.7 79.5
AVERAGE DARM8W 2026/04/24 2026 42.5 16.3 17.7 15.0 14.6 15.6 26.0 63.9 188.2 159.8 53.3 31.4 22.2 147.7 98.6 42.5
PCT AVG DARM8W 2026/04/24 2026 187.1 76.5 100.5 217.7 168.2 137.4 236.0 169.1 189.3 187.1
Bitterroot River - near Missoula (BITM8W) [123525000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BITM8W 2026/04/24 2026 196.3 43.4 76.1 162.3 96.9 67.1 188.2 830.2 548.4 196.3
AVERAGE BITM8W 2026/04/24 2026 115.9 58.1 68.5 58.6 53.9 56.6 83.3 170.3 439.6 441.3 139.3 50.5 48.1 495.0 309.8 115.9
PCT AVG BITM8W 2026/04/24 2026 169.4 74.7 111.0 277.0 179.6 118.5 225.9 167.7 177.1 169.4
Clark Fork River - below Missoula (BELM8W) [123530000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BELM8W 2026/04/24 2026 453.1 111.8 147.5 287.9 203.3 154.2 398.5 1756.3 1209.0 453.1
AVERAGE BELM8W 2026/04/24 2026 288.6 150.3 162.0 141.8 136.4 141.7 212.1 426.2 973.1 907.6 322.8 137.0 126.1 1232.9 778.8 288.6
PCT AVG BELM8W 2026/04/24 2026 157.0 74.4 91.1 203.0 149.1 108.8 187.9 142.5 155.2 157.0
Clark Fork River - at St Regis (SRGM8W) [123545000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SRGM8W 2026/04/24 2026 618.1 136.4 184.2 477.5 310.4 230.4 579.6 2536.7 1738.5 618.1
AVERAGE SRGM8W 2026/04/24 2026 401.1 187.3 210.5 193.4 182.8 197.0 298.2 589.5 1270.6 1147.2 421.9 180.7 160.8 1670.2 1079.1 401.1
PCT AVG SRGM8W 2026/04/24 2026 154.1 72.9 87.5 247.0 169.8 117.0 194.4 151.9 161.1 154.1
NF Flathead River - near Columbia Falls (FCFM8W) [123555000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF FCFM8W 2026/04/24 2026 207.4 38.0 106.6 233.8 118.4 66.8 213.7 984.6 606.3 207.4
AVERAGE FCFM8W 2026/04/24 2026 141.5 68.2 84.4 59.4 49.1 44.3 76.8 222.3 585.3 562.9 230.0 89.9 60.0 523.6 311.6 141.5
PCT AVG FCFM8W 2026/04/24 2026 146.6 55.7 126.3 393.7 241.2 150.9 278.4 188.1 194.6 146.6
MF Flathead River - near West Glacier (WGCM8W) [123585000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WGCM8W 2026/04/24 2026 205.0 21.8 106.5 318.2 120.6 67.2 246.4 1085.8 639.3 205.0
AVERAGE WGCM8W 2026/04/24 2026 139.9 60.0 83.7 56.2 44.8 44.3 78.2 219.1 582.4 552.3 222.2 74.5 46.4 507.2 307.2 139.9
PCT AVG WGCM8W 2026/04/24 2026 146.5 36.3 127.2 566.5 269.1 151.9 315.0 214.1 208.1 146.5
SF Flathead River - Hungry Horse Dam (HHWM8W) [123625001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HHWM8W 2026/04/24 2026 310.8 35.7 113.1 377.0 162.6 84.1 326.2 1409.5 883.7 310.8
AVERAGE HHWM8W 2026/04/24 2026 209.7 62.4 92.1 69.2 67.2 67.8 119.7 319.3 782.5 665.4 213.6 62.3 45.0 688.1 464.3 209.7
PCT AVG HHWM8W 2026/04/24 2026 148.2 57.2 122.7 544.8 242.1 124.1 272.6 204.8 190.3 148.2
Flathead River - at Columbia Falls (CFMM8W) [123630001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CFMM8W 2026/04/24 2026 726.1 92.0 321.2 928.5 410.3 221.5 781.9 3481.4 2139.8 726.1
AVERAGE CFMM8W 2026/04/24 2026 495.8 200.4 268.8 192.6 168.1 161.0 280.1 768.2 1973.9 1810.1 684.5 236.4 160.4 1766.7 1104.9 495.8
PCT AVG CFMM8W 2026/04/24 2026 146.5 45.9 119.5 482.0 244.1 137.6 279.1 197.1 193.7 146.5
Flathead River - Kerr Dam (KERM8W) [123720001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF KERM8W 2026/04/24 2026 856.1 104.8 376.4 1055.0 488.5 314.2 937.9 4132.9 2596.7 856.1
AVERAGE KERM8W 2026/04/24 2026 623.0 239.8 328.9 257.5 245.2 235.6 390.7 947.0 2253.2 2117.4 819.1 259.1 180.9 2320.7 1494.5 623.0
PCT AVG KERM8W 2026/04/24 2026 137.4 43.7 114.5 409.7 199.2 133.4 240.1 178.1 173.7 137.4
Clark Fork River - near Plains (PLNM8W) [123890001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PLNM8W 2026/04/24 2026 1535.1 265.5 571.3 1559.9 826.1 562.9 1570.2 6891.0 4494.3 1535.1
AVERAGE PLNM8W 2026/04/24 2026 1030.9 441.5 557.5 464.8 441.3 445.4 703.1 1547.1 3560.1 3340.2 1301.3 466.8 358.7 4084.4 2620.6 1030.9
PCT AVG PLNM8W 2026/04/24 2026 148.9 60.1 102.5 335.6 187.2 126.4 223.3 168.7 171.5 148.9
Clark Fork River - Cabinet Gorge Dam (CABI1W) [123920001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CABI1W 2026/04/24 2026 1660.5 248.9 583.3 1808.1 925.8 600.5 1749.3 7576.4 4936.2 1660.5
AVERAGE CABI1W 2026/04/24 2026 1189.0 437.9 582.7 507.3 487.9 509.8 821.3 1775.9 3946.6 3619.2 1425.7 512.5 359.1 4535.8 3008.0 1189.0
PCT AVG CABI1W 2026/04/24 2026 139.7 56.8 100.1 356.4 189.7 117.8 213.0 167.0 164.1 139.7
Priest River - near Priest River (PRTI1W) [123950001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PRTI1W 2026/04/24 2026 114.0 20.3 61.7 145.2 87.0 64.2 99.2 591.5 364.4 114.0
AVERAGE PRTI1W 2026/04/24 2026 148.9 34.9 57.2 55.8 53.5 58.4 113.4 209.9 323.8 201.9 64.3 23.4 19.9 522.0 374.2 148.9
PCT AVG PRTI1W 2026/04/24 2026 76.5 58.0 107.8 260.4 162.7 109.9 87.5 113.3 97.4 76.5
Pend Oreille River - Albeni Falls Dam (ALFW1W) [123955001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ALFW1W 2026/04/24 2026 1988.9 369.5 811.4 2246.6 1213.9 828.3 2067.7 9526.4 6098.8 1988.9
AVERAGE ALFW1W 2026/04/24 2026 1536.9 566.3 762.4 682.3 673.3 720.1 1153.7 2254.9 4575.1 4001.6 1537.6 550.0 427.9 6095.0 4084.0 1536.9
PCT AVG ALFW1W 2026/04/24 2026 129.4 65.3 106.4 329.3 180.3 115.0 179.2 156.3 149.3 129.4
Columbia River - at International Boundary (CIBW1W) [123995001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CIBW1W 2026/04/24 2026 5231.9 1756.0 2674.3 5119.8 3152.4 2335.0 5351.7 25621.1 16071.0 5231.9
AVERAGE CIBW1W 2026/04/24 2026 4009.2 2801.1 2780.2 2261.0 2061.1 1909.7 2926.7 6015.9 15020.6 16676.5 10594.2 5356.3 3286.1 18749.1 10906.7 4009.2
PCT AVG CIBW1W 2026/04/24 2026 130.5 62.7 96.2 226.4 152.9 122.3 182.9 136.7 147.3 130.5
Kettle River - at Laurier (LAUW1W) [124045000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LAUW1W 2026/04/24 2026 240.6 12.8 37.1 65.2 69.3 58.5 152.6 636.2 521.1 240.6
AVERAGE LAUW1W 2026/04/24 2026 254.6 34.0 47.5 40.5 34.9 40.6 95.9 389.1 802.8 528.8 165.8 41.4 25.7 548.0 426.0 254.6
PCT AVG LAUW1W 2026/04/24 2026 94.5 37.7 78.1 161.2 198.5 144.0 159.2 116.1 122.3 94.5
NF Coeur D Alene River - at Enaville (ENVI1W) [124130000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ENVI1W 2026/04/24 2026 146.5 16.5 39.3 374.7 162.9 135.3 285.5 1160.8 730.3 146.5
AVERAGE ENVI1W 2026/04/24 2026 226.4 22.3 59.2 76.1 98.3 123.9 198.3 302.7 264.4 104.0 36.5 19.6 15.4 804.5 646.9 226.4
PCT AVG ENVI1W 2026/04/24 2026 64.7 74.0 66.4 492.5 165.7 109.2 144.0 144.3 112.9 64.7
St Joe River - at Calder (CLDI1W) [124145000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CLDI1W 2026/04/24 2026 234.9 22.3 41.1 362.3 159.4 127.8 325.1 1273.0 847.2 234.9
AVERAGE CLDI1W 2026/04/24 2026 212.8 30.9 61.6 66.1 75.9 99.1 163.8 299.5 443.3 250.2 82.8 36.1 25.8 710.2 551.6 212.8
PCT AVG CLDI1W 2026/04/24 2026 110.4 72.2 66.7 548.0 210.1 129.0 198.5 179.2 153.6 110.4
Coeur D Alene River - Coeur D Alene Lake (COEI1W) [124190001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF COEI1W 2026/04/24 2026 538.8 52.5 115.6 966.7 491.9 338.4 943.1 3447.1 2312.3 538.8
AVERAGE COEI1W 2026/04/24 2026 667.3 78.8 182.4 255.0 344.1 429.7 662.6 900.0 943.5 457.4 126.9 41.8 34.8 2619.9 2103.7 667.3
PCT AVG COEI1W 2026/04/24 2026 80.7 66.6 63.4 379.1 143.0 78.7 142.3 131.6 109.9 80.7
Spokane River - at Spokane (SPOW1W) [124225001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SPOW1W 2026/04/24 2026 539.4 60.8 130.4 906.6 510.3 358.4 901.4 3407.4 2309.6 539.4
AVERAGE SPOW1W 2026/04/24 2026 660.6 92.1 192.5 261.7 355.5 433.5 658.3 890.6 943.0 483.7 157.4 65.2 46.8 2654.1 2107.8 660.6
PCT AVG SPOW1W 2026/04/24 2026 81.7 66.0 67.8 346.4 143.6 82.7 136.9 128.4 109.6 81.7
Spokane River - Long Lake (LLKW1W) [124330000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LLKW1W 2026/04/24 2026 580.6 93.9 162.7 933.9 547.8 398.7 983.5 3701.1 2510.6 580.6
AVERAGE LLKW1W 2026/04/24 2026 727.2 130.7 230.4 314.2 435.8 515.8 762.5 975.6 1005.9 533.1 199.3 103.5 83.3 3116.5 2441.2 727.2
PCT AVG LLKW1W 2026/04/24 2026 79.8 71.8 70.6 297.2 125.7 77.3 129.0 118.8 102.8 79.8
Columbia River - Grand Coulee Dam (GCDW1W) [124365003 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF GCDW1W 2026/04/24 2026 5989.0 1763.8 2799.1 6005.3 3643.1 2728.6 6473.1 29402.0 18833.8 5989.0
AVERAGE GCDW1W 2026/04/24 2026 5140.4 2867.1 2987.4 2530.6 2506.8 2516.5 3927.7 7581.9 16850.3 17578.0 10764.2 5412.2 3295.0 22476.5 14091.4 5140.4
PCT AVG GCDW1W 2026/04/24 2026 116.5 61.5 93.7 237.3 145.3 108.4 164.8 130.8 133.7 116.5
Columbia River - Grand Coulee Dam (GCDW1) [124365003 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF GCDW1 2026/04/24 2026 5017.2 3847.3 4908.9 6247.0 8295.6 6986.3 7476.1 42778.4 27775.2 5017.2
AVERAGE GCDW1 2026/04/24 2026 4983.5 4237.2 5245.1 6020.9 6537.7 5588.7 5732.4 6718.3 8100.6 8509.1 7285.3 6221.3 4040.0 38345.6 22842.4 4983.5
PCT AVG GCDW1 2026/04/24 2026 100.7 90.8 93.6 103.8 126.9 125.0 130.4 111.6 121.6 100.7
Similkameen River - near Hedley (SMKQ2W) [124398600 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SMKQ2W 2026/04/24 2026 165.5 11.3 60.9 208.8 119.2 60.4 150.7 776.8 495.7 165.5
AVERAGE SMKQ2W 2026/04/24 2026 99.4 32.6 60.3 37.7 34.0 35.5 52.4 157.7 415.6 283.3 99.3 28.3 19.8 352.0 221.3 99.4
PCT AVG SMKQ2W 2026/04/24 2026 166.5 34.8 101.0 553.4 350.2 170.2 287.4 220.7 224.0 166.5
Similkameen River - near Nighthawk (NITW1W) [124425000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF NITW1W 2026/04/24 2026 206.1 16.0 71.8 237.9 150.2 84.8 173.4 940.2 614.6 206.1
AVERAGE NITW1W 2026/04/24 2026 106.5 43.3 73.1 53.2 46.8 46.6 62.8 170.4 531.5 422.7 161.6 49.0 30.7 432.4 262.7 106.5
PCT AVG NITW1W 2026/04/24 2026 193.6 36.9 98.1 446.9 320.5 182.0 276.3 217.4 233.9 193.6
Okanogan River - near Tonasket (TONW1W) [124450000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF TONW1W 2026/04/24 2026 209.4 38.1 91.0 253.2 170.1 99.9 182.7 1044.4 662.0 209.4
AVERAGE TONW1W 2026/04/24 2026 140.7 72.0 99.9 80.2 78.1 81.4 106.0 217.5 611.7 509.5 226.9 90.0 64.1 658.4 406.3 140.7
PCT AVG TONW1W 2026/04/24 2026 148.8 52.9 91.2 315.7 217.7 122.7 172.3 158.6 163.0 148.8
Methow River - near Pateros (PATW1W) [124499500 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PATW1W 2026/04/24 2026 168.8 19.9 39.6 169.4 101.4 60.7 147.6 707.4 478.5 168.8
AVERAGE PATW1W 2026/04/24 2026 84.4 29.8 38.4 31.5 27.3 26.0 43.9 129.2 364.2 295.1 115.5 37.9 23.3 281.2 181.5 84.4
PCT AVG PATW1W 2026/04/24 2026 200.0 66.8 103.3 538.6 371.9 233.3 336.5 251.6 263.6 200.0
Stehekin River - near Stehekin (STHW1W) [124510000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF STHW1W 2026/04/24 2026 91.0 12.5 89.3 178.3 65.9 31.5 126.1 594.6 314.5 91.0
AVERAGE STHW1W 2026/04/24 2026 64.0 41.8 59.7 31.8 30.1 27.9 40.9 95.5 236.1 227.6 151.1 67.2 36.4 296.2 162.9 64.0
PCT AVG STHW1W 2026/04/24 2026 142.1 29.9 149.7 560.2 219.1 113.2 308.2 200.8 193.1 142.1
Chelan River - Lake Chelan Dam (CHDW1W) [124525001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CHDW1W 2026/04/24 2026 137.6 15.8 118.3 316.0 136.0 70.5 200.9 995.0 544.9 137.6
AVERAGE CHDW1W 2026/04/24 2026 101.0 51.8 83.6 56.4 55.7 54.6 76.4 149.8 358.7 328.4 192.4 72.9 36.9 479.5 287.8 101.0
PCT AVG CHDW1W 2026/04/24 2026 136.2 30.6 141.5 560.1 243.9 129.1 262.9 207.5 189.4 136.2
Wenatchee River - at Peshastin (PESW1W) [124590000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PESW1W 2026/04/24 2026 210.9 26.0 177.1 557.8 211.4 136.4 364.6 1684.2 923.3 210.9
AVERAGE PESW1W 2026/04/24 2026 165.9 74.2 156.1 102.6 104.8 105.9 134.8 238.6 489.4 429.3 222.0 74.3 42.3 844.2 511.3 165.9
PCT AVG PESW1W 2026/04/24 2026 127.2 35.0 113.5 543.5 201.8 128.8 270.5 199.5 180.6 127.2
Columbia River - below Rock Island Dam (RISW1W) [124626001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF RISW1W 2026/04/24 2026 6873.7 1906.8 3344.1 7413.2 4587.4 3284.1 7549.9 34959.2 22295.1 6873.7
AVERAGE RISW1W 2026/04/24 2026 5713.9 3136.8 3423.0 2900.5 2849.6 2877.4 4427.5 8429.2 18872.8 19311.6 11642.5 5772.2 3493.3 25328.7 15868.4 5713.9
PCT AVG RISW1W 2026/04/24 2026 120.3 60.8 97.7 255.6 161.0 114.1 170.5 138.0 140.5 120.3
Columbia River - Priest Rapids Dam (PRDW1W) [124728001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PRDW1W 2026/04/24 2026 7029.4 2051.4 3300.3 7593.4 4651.0 3323.9 7686.2 35635.6 22690.5 7029.4
AVERAGE PRDW1W 2026/04/24 2026 5802.7 3184.9 3422.3 2974.6 2926.7 2979.7 4517.8 8565.7 19074.5 19536.6 11728.3 5750.5 3503.8 25808.8 16227.0 5802.7
PCT AVG PRDW1W 2026/04/24 2026 121.1 64.4 96.4 255.3 158.9 111.6 170.1 138.1 139.8 121.1
Yakima River - near Martin (KEEW1W) [124745001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF KEEW1W 2026/04/24 2026 15.1 6.8 26.9 78.7 18.7 15.9 56.0 218.1 105.7 15.1
AVERAGE KEEW1W 2026/04/24 2026 22.6 14.3 28.6 18.6 22.0 16.8 19.7 31.6 45.7 28.6 11.9 6.6 4.7 142.5 81.1 22.6
PCT AVG KEEW1W 2026/04/24 2026 66.8 47.8 94.1 423.9 85.0 94.4 284.8 153.0 130.3 66.8
Kachess River - near Easton (KACW1W) [124760001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF KACW1W 2026/04/24 2026 17.1 4.7 21.4 71.9 19.8 14.6 45.7 195.3 97.3 17.1
AVERAGE KACW1W 2026/04/24 2026 20.8 11.0 23.1 16.1 19.5 15.9 18.6 28.9 41.4 24.5 8.8 4.0 6.3 125.1 74.9 20.8
PCT AVG KACW1W 2026/04/24 2026 82.3 42.7 92.7 446.5 101.4 91.9 245.7 156.1 129.9 82.3
Cle Elum River - near Roslyn (CLEW1W) [124790001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CLEW1W 2026/04/24 2026 45.1 14.1 70.1 208.1 54.4 35.8 116.6 544.1 251.9 45.1
AVERAGE CLEW1W 2026/04/24 2026 55.9 28.0 61.5 37.8 43.3 37.5 45.2 79.8 144.6 107.9 53.3 21.6 11.6 309.2 181.9 55.9
PCT AVG CLEW1W 2026/04/24 2026 80.5 50.3 113.9 551.1 125.8 95.3 258.0 176.0 138.4 80.5
Yakima River - near Horlick (HLKW1W) [124795001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HLKW1W 2026/04/24 2026 129.7 37.7 150.6 582.1 162.5 115.7 367.1 1545.5 775.0 129.7
AVERAGE HLKW1W 2026/04/24 2026 179.8 77.0 156.8 114.5 141.4 131.5 161.2 247.3 338.5 205.9 84.4 40.1 45.9 962.3 614.0 179.8
PCT AVG HLKW1W 2026/04/24 2026 72.1 49.0 96.0 508.3 114.9 88.0 227.7 160.6 126.2 72.1
Bumping River - below Bumping Dam (BUMW1W) [124880001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BUMW1W 2026/04/24 2026 18.4 3.6 21.5 55.6 13.0 13.2 32.5 157.9 77.1 18.4
AVERAGE BUMW1W 2026/04/24 2026 14.8 7.5 17.6 14.0 15.2 13.7 14.1 21.3 44.0 35.3 14.4 5.5 4.1 96.9 57.8 14.8
PCT AVG BUMW1W 2026/04/24 2026 124.3 48.4 122.0 397.4 85.9 96.0 230.8 162.9 133.5 124.3
Tieton River - at Tieton Dam (RIMW1W) [124915001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF RIMW1W 2026/04/24 2026 26.4 11.2 32.0 96.1 56.9 24.4 60.7 307.7 168.4 26.4
AVERAGE RIMW1W 2026/04/24 2026 27.0 16.9 26.3 24.0 26.6 26.1 27.0 37.6 64.6 55.8 32.7 18.1 16.1 173.9 106.7 27.0
PCT AVG RIMW1W 2026/04/24 2026 97.9 66.1 121.6 401.3 213.5 93.6 224.6 176.9 157.8 97.9
Naches River - near Naches (NACW1W) [124940003 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF NACW1W 2026/04/24 2026 146.5 23.6 91.0 452.7 186.7 86.0 268.9 1255.4 688.1 146.5
AVERAGE NACW1W 2026/04/24 2026 126.0 40.5 78.8 77.4 88.8 94.5 108.6 175.5 275.3 199.7 86.7 36.2 33.9 614.6 417.9 126.0
PCT AVG NACW1W 2026/04/24 2026 116.3 58.2 115.5 585.2 210.4 91.0 247.5 204.3 164.7 116.3
Yakima River - near Parker (PARW1W) [125050003 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PARW1W 2026/04/24 2026 254.5 74.7 262.2 968.7 323.7 211.0 653.2 2748.0 1442.4 254.5
AVERAGE PARW1W 2026/04/24 2026 340.5 147.8 263.5 218.6 267.5 277.9 327.0 468.2 663.1 426.5 163.4 82.4 95.1 1842.9 1212.9 340.5
PCT AVG PARW1W 2026/04/24 2026 74.7 50.5 99.5 443.1 121.0 76.0 199.8 149.1 118.9 74.7
Yakima River - at Kiona (KIOW1W) [125105000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF KIOW1W 2026/04/24 2026 198.7 64.8 133.4 614.3 342.1 230.5 524.7 2108.4 1295.9 198.7
AVERAGE KIOW1W 2026/04/24 2026 238.0 134.0 183.1 216.3 244.8 277.3 307.9 309.5 331.5 217.1 93.5 91.2 106.4 1601.3 1067.9 238.0
PCT AVG KIOW1W 2026/04/24 2026 83.5 48.4 72.8 284.0 139.7 83.1 170.4 131.7 121.3 83.5
Snake River - Jackson Lake at Dam (JLKW4W) [130110001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF JLKW4W 2026/04/24 2026 80.6 25.9 22.3 45.8 32.4 27.1 54.7 289.0 194.9 80.6
AVERAGE JLKW4W 2026/04/24 2026 45.1 29.6 29.8 32.7 34.7 29.1 34.1 72.2 299.7 293.3 105.9 44.9 33.0 235.0 142.9 45.1
PCT AVG JLKW4W 2026/04/24 2026 178.9 87.5 75.0 140.0 93.5 93.2 160.6 123.0 136.4 178.9
Salt River - above Palisades Res near Etna (SALW4W) [130275000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SALW4W 2026/04/24 2026 31.2 32.5 28.1 31.2 29.5 25.7 37.8 216.0 124.3 31.2
AVERAGE SALW4W 2026/04/24 2026 42.8 34.5 32.0 29.2 26.3 23.3 31.9 59.9 100.7 92.0 48.5 33.6 33.3 220.0 124.3 42.8
PCT AVG SALW4W 2026/04/24 2026 72.9 94.1 87.8 107.1 112.1 110.5 118.5 98.2 99.9 72.9
Greys River - above Palisades Res near Alpine (GREW4W) [130230000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF GREW4W 2026/04/24 2026 40.4 16.1 14.2 15.7 13.6 12.6 37.3 150.0 103.9 40.4
AVERAGE GREW4W 2026/04/24 2026 29.8 19.3 16.0 13.6 12.6 11.0 16.7 44.8 111.8 110.8 53.3 28.8 21.9 119.1 70.1 29.8
PCT AVG GREW4W 2026/04/24 2026 135.6 83.5 88.7 115.5 107.5 114.4 223.3 125.9 148.1 135.6
Snake River - near Irwin (PALI1W) [130325001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PALI1W 2026/04/24 2026 360.7 188.3 160.3 202.3 165.0 138.6 285.9 1501.0 950.1 360.7
AVERAGE PALI1W 2026/04/24 2026 254.1 207.0 176.6 164.7 159.7 140.9 184.8 378.7 1041.4 1128.8 547.9 265.3 214.6 1287.9 739.6 254.1
PCT AVG PALI1W 2026/04/24 2026 141.9 91.0 90.7 122.9 103.3 98.3 154.7 116.5 128.5 141.9
Snake River - near Heise (HEII1W) [130375001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HEII1W 2026/04/24 2026 369.8 214.3 187.8 232.2 194.1 164.9 321.1 1684.1 1049.9 369.8
AVERAGE HEII1W 2026/04/24 2026 284.5 239.7 205.6 191.4 184.5 162.8 215.1 421.1 1115.3 1187.0 584.3 297.3 244.3 1483.5 846.8 284.5
PCT AVG HEII1W 2026/04/24 2026 130.0 89.4 91.3 121.3 105.2 101.3 149.3 113.5 124.0 130.0
Henrys Fork River - at St Anthony (ANTI1W) [130505000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ANTI1W 2026/04/24 2026 57.3 58.2 67.2 89.5 86.4 74.0 96.9 529.5 314.6 57.3
AVERAGE ANTI1W 2026/04/24 2026 93.8 81.3 92.8 98.5 100.2 89.5 100.8 138.4 242.2 172.6 86.1 80.2 74.7 656.9 384.3 93.8
PCT AVG ANTI1W 2026/04/24 2026 61.0 71.6 72.5 90.8 86.3 82.7 96.2 80.6 81.9 61.0
Teton River - near St Anthony (TEAI1W) [130550000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF TEAI1W 2026/04/24 2026 35.3 26.8 23.1 28.6 24.9 22.1 35.3 196.1 117.6 35.3
AVERAGE TEAI1W 2026/04/24 2026 31.8 33.0 28.9 25.8 24.2 22.2 32.6 45.3 113.0 135.8 74.3 43.3 35.4 198.5 110.8 31.8
PCT AVG TEAI1W 2026/04/24 2026 111.1 81.1 80.1 110.9 102.9 99.4 108.2 98.8 106.1 111.1
Henrys Fork River - at Rexburg (REXI1W) [130565001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF REXI1W 2026/04/24 2026 133.6 103.1 94.0 123.7 110.4 86.8 152.7 804.3 483.5 133.6
AVERAGE REXI1W 2026/04/24 2026 150.2 163.4 136.8 130.3 129.3 115.3 140.4 218.9 434.4 416.8 265.2 200.7 174.2 965.6 535.1 150.2
PCT AVG REXI1W 2026/04/24 2026 89.0 63.1 68.7 95.0 85.4 75.3 108.7 83.3 90.3 89.0
Henrys Fork River - at Rexburg (REXI1) [130565001 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF REXI1 2026/04/24 2026 55.2 67.2 80.1 105.4 103.4 86.4 107.6 605.4 352.8 55.2
AVERAGE REXI1 2026/04/24 2026 94.9 90.5 104.8 111.0 111.6 101.8 112.4 134.2 243.1 211.5 70.2 69.0 72.4 727.0 420.7 94.9
PCT AVG REXI1 2026/04/24 2026 58.2 74.2 76.4 95.0 92.7 84.9 95.7 83.3 83.9 58.2
Willow Creek - near Ririe (RIRI1W) [130580000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF RIRI1W 2026/04/24 2026 2.5 4.2 2.0 2.9 2.6 2.7 6.5 23.4 14.3 2.5
AVERAGE RIRI1W 2026/04/24 2026 13.0 2.4 2.7 2.6 2.6 2.6 5.5 19.5 26.5 9.8 2.4 0.8 1.2 31.4 23.7 13.0
PCT AVG RIRI1W 2026/04/24 2026 19.2 172.9 74.4 113.7 101.3 102.8 118.8 74.6 60.3 19.2
Snake River - near Shelley (SHYI1W) [130600001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SHYI1W 2026/04/24 2026 352.7 281.8 264.6 331.9 292.9 257.6 426.1 2207.6 1329.3 352.7
AVERAGE SHYI1W 2026/04/24 2026 327.9 376.9 305.4 266.9 252.2 223.0 274.0 493.6 1384.6 1471.1 740.2 430.8 384.2 2026.4 1077.1 327.9
PCT AVG SHYI1W 2026/04/24 2026 107.6 74.8 86.6 124.3 116.1 115.5 155.5 108.9 123.4 107.6
Portneuf River - at Topaz (TOPI1W) [130730000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF TOPI1W 2026/04/24 2026 6.3 6.0 7.2 8.2 8.3 7.6 8.7 52.4 31.0 6.3
AVERAGE TOPI1W 2026/04/24 2026 9.8 6.0 6.8 7.1 7.4 7.7 10.7 13.3 19.4 14.4 10.6 8.5 6.0 55.4 35.4 9.8
PCT AVG TOPI1W 2026/04/24 2026 64.6 98.7 105.3 116.3 113.2 99.1 82.0 94.5 87.4 64.6
Snake River - at American Falls Dam (AMFI1W) [130770001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF AMFI1W 2026/04/24 2026 233.2 317.8 353.3 414.8 358.4 303.8 476.1 2457.4 1371.5 233.2
AVERAGE AMFI1W 2026/04/24 2026 364.2 326.8 416.3 393.8 380.4 343.3 394.8 509.7 975.4 910.4 133.8 11.7 92.3 2619.5 1482.7 364.2
PCT AVG AMFI1W 2026/04/24 2026 64.0 97.2 84.9 105.3 94.2 88.5 120.6 93.8 92.5 64.0
Snake River - at Milner (MILI1W) [130880000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MILI1W 2026/04/24 2026 0.0 0.0 0.0 14.8 15.8 6.6 0.0 37.1 22.4 0.0
AVERAGE MILI1W 2026/04/24 2026 30.7 13.7 37.5 44.1 53.8 45.8 54.9 34.0 44.6 62.4 93.1 37.2 11.6 280.5 185.3 30.7
PCT AVG MILI1W 2026/04/24 2026 0.0 0.0 0.0 33.5 29.3 14.4 0.0 13.2 12.1 0.0
Big Lost River - at Howell Ranch near Chilly (HWRI1W) [131205000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HWRI1W 2026/04/24 2026 15.3 5.7 5.7 6.6 6.8 4.9 13.6 58.7 40.7 15.3
AVERAGE HWRI1W 2026/04/24 2026 7.1 7.5 6.0 5.0 4.8 4.0 5.3 11.2 48.3 65.4 29.3 10.5 7.1 39.6 21.1 7.1
PCT AVG HWRI1W 2026/04/24 2026 215.1 76.9 95.9 131.9 143.9 123.4 258.3 148.4 192.5 215.1
Big Lost River - Mackay Res near Mackay (MACI1W) [131270001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MACI1W 2026/04/24 2026 10.0 10.9 9.4 9.5 8.8 7.8 10.2 66.5 36.7 10.0
AVERAGE MACI1W 2026/04/24 2026 7.4 11.3 10.9 10.1 9.7 8.6 9.6 10.2 28.6 49.5 25.2 12.5 10.3 67.6 35.3 7.4
PCT AVG MACI1W 2026/04/24 2026 135.0 96.4 86.5 93.8 90.4 90.8 105.8 98.4 104.0 135.0
Big Wood River - at Hailey (HALI1W) [131395000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HALI1W 2026/04/24 2026 30.7 9.7 9.9 11.5 11.0 10.1 25.7 108.6 77.4 30.7
AVERAGE HALI1W 2026/04/24 2026 22.0 12.3 10.9 9.3 9.5 8.5 13.7 33.0 80.2 82.7 35.7 14.7 10.7 86.1 53.7 22.0
PCT AVG HALI1W 2026/04/24 2026 139.4 79.0 91.0 124.7 115.1 119.1 187.5 126.0 144.1 139.4
Big Wood River - Magic Dam (MAGI1W) [131425001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MAGI1W 2026/04/24 2026 23.8 6.8 3.5 8.5 10.0 8.7 24.1 85.4 66.5 23.8
AVERAGE MAGI1W 2026/04/24 2026 51.0 7.5 7.7 5.5 6.1 7.4 32.3 65.6 73.9 66.2 21.1 7.8 5.9 117.5 96.8 51.0
PCT AVG MAGI1W 2026/04/24 2026 46.6 90.6 45.5 155.5 162.9 117.6 74.6 72.7 68.7 46.6
Little Wood River - near Carey (WODI1W) [131485001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WODI1W 2026/04/24 2026 7.7 2.7 2.6 6.2 4.6 4.2 9.3 37.2 25.8 7.7
AVERAGE WODI1W 2026/04/24 2026 15.7 3.4 3.5 3.3 3.7 3.5 9.9 20.5 24.1 19.4 7.4 2.9 2.3 43.1 32.8 15.7
PCT AVG WODI1W 2026/04/24 2026 49.3 77.9 72.8 185.4 124.3 119.3 93.1 86.2 78.5 49.3
Snake River - at King Hill (SKHI1W) [131545000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SKHI1W 2026/04/24 2026 288.4 455.7 379.5 395.7 380.8 329.9 357.6 2587.6 1356.7 288.4
AVERAGE SKHI1W 2026/04/24 2026 521.0 524.8 486.9 524.5 545.2 505.2 623.3 675.0 654.1 629.0 492.4 475.0 486.5 3730.8 2194.6 521.0
PCT AVG SKHI1W 2026/04/24 2026 55.4 86.8 78.0 75.4 69.8 65.3 57.4 69.4 61.8 55.4
Bruneau River - near Hot Springs (HOTI1W) [131685000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HOTI1W 2026/04/24 2026 8.9 4.6 4.7 7.4 6.5 7.7 13.1 53.0 36.3 8.9
AVERAGE HOTI1W 2026/04/24 2026 30.4 4.6 5.7 6.7 8.3 10.7 22.3 43.3 71.8 47.7 12.7 4.2 3.3 88.8 71.7 30.4
PCT AVG HOTI1W 2026/04/24 2026 29.3 101.3 81.9 110.1 78.8 72.0 58.7 59.7 50.5 29.3
Snake River - below Swan Falls (SWAI1W) [131725000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SWAI1W 2026/04/24 2026 262.9 464.9 400.3 420.9 404.5 353.5 365.4 2672.3 1386.3 262.9
AVERAGE SWAI1W 2026/04/24 2026 533.6 519.6 501.4 543.3 567.7 531.0 657.6 690.6 678.2 609.5 426.3 407.2 446.3 3854.2 2289.9 533.6
PCT AVG SWAI1W 2026/04/24 2026 49.3 89.5 79.8 77.5 71.2 66.6 55.6 69.3 60.5 49.3
Owyhee River - near Gold Creek (WDHN2W) [131745001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WDHN2W 2026/04/24 2026 0.1 -0.2 0.1 0.5 0.4 3.7 1.1 5.8 5.3 0.1
AVERAGE WDHN2W 2026/04/24 2026 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
PCT AVG WDHN2W 2026/04/24 2026
Owyhee River - below Owyhee Dam (OWYO3W) [131830003 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF OWYO3W 2026/04/24 2026 12.4 14.4 17.2 24.2 22.8 19.7 24.6 135.4 79.5 12.4
AVERAGE OWYO3W 2026/04/24 2026 103.3 17.0 18.6 29.8 43.2 57.6 138.0 131.0 110.9 46.6 18.9 14.0 14.1 407.6 342.1 103.3
PCT AVG OWYO3W 2026/04/24 2026 12.0 84.7 92.5 81.1 52.8 34.2 17.8 33.2 23.2 12.0
Owyhee River - below Owyhee Dam (OWYO3) [131830003 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF OWYO3 2026/04/24 2026 5.4 7.5 1.9 1.9 1.6 1.7 1.6 21.6 10.3 5.4
AVERAGE OWYO3 2026/04/24 2026 8.0 6.0 0.9 1.0 1.2 1.1 1.9 10.9 12.9 12.7 13.1 12.7 11.6 20.2 12.3 8.0
PCT AVG OWYO3 2026/04/24 2026 66.6 125.4 207.9 185.1 137.7 148.6 82.9 106.8 83.6 66.6
SF Boise River - Anderson Ranch Dam (ARAI1W) [131905001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ARAI1W 2026/04/24 2026 62.0 16.8 18.3 43.3 32.9 25.2 57.2 255.7 177.3 62.0
AVERAGE ARAI1W 2026/04/24 2026 78.8 17.0 18.2 19.0 20.4 21.2 46.8 111.9 181.8 127.2 40.8 18.7 14.1 221.4 167.2 78.8
PCT AVG ARAI1W 2026/04/24 2026 78.7 99.0 100.3 227.4 161.5 118.6 122.3 115.5 106.0 78.7
Boise River - Lucky Peak Dam (LUCI1W) [132020001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LUCI1W 2026/04/24 2026 194.1 47.3 53.4 124.2 94.3 74.4 157.6 745.3 520.4 194.1
AVERAGE LUCI1W 2026/04/24 2026 236.7 48.6 55.0 62.7 71.5 81.9 179.7 326.9 469.6 322.9 112.5 51.9 44.8 736.1 569.9 236.7
PCT AVG LUCI1W 2026/04/24 2026 82.0 97.5 97.2 198.0 131.8 90.9 87.7 101.2 91.3 82.0
Boise River - near Parma (PARI1W) [132130000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PARI1W 2026/04/24 2026 56.4 55.3 50.8 53.8 51.8 45.6 41.9 355.6 195.7 56.4
AVERAGE PARI1W 2026/04/24 2026 111.7 56.1 52.5 55.5 67.2 82.9 123.9 145.5 167.9 117.4 55.4 45.3 52.6 549.9 385.8 111.7
PCT AVG PARI1W 2026/04/24 2026 50.5 98.5 96.8 96.9 77.1 55.0 33.8 64.7 50.7 50.5
Malheur River - near Drewsey (MADO3W) [132140000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MADO3W 2026/04/24 2026 7.2 3.7 4.4 6.1 5.3 8.6 9.9 45.2 31.0 7.2
AVERAGE MADO3W 2026/04/24 2026 27.3 3.2 4.2 6.0 8.5 11.3 32.4 34.0 20.2 7.6 1.8 0.4 0.9 92.8 79.4 27.3
PCT AVG MADO3W 2026/04/24 2026 26.4 116.0 104.8 102.3 62.6 76.0 30.5 48.7 39.0 26.4
NF Malheur River - at Beulah (BEUO3W) [132175001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BEUO3W 2026/04/24 2026 6.5 3.1 3.8 4.8 4.4 4.8 6.6 34.1 22.3 6.5
AVERAGE BEUO3W 2026/04/24 2026 16.8 3.3 3.6 4.5 5.4 6.7 17.8 21.8 19.2 8.7 4.0 2.9 2.7 58.1 46.6 16.8
PCT AVG BEUO3W 2026/04/24 2026 38.5 94.6 105.8 106.5 82.2 72.2 37.3 58.7 47.9 38.5
Deadwood River - below Deadwood Reservoir (DRBI1W) [132365001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF DRBI1W 2026/04/24 2026 24.9 5.2 6.7 13.0 9.0 7.0 15.2 80.9 56.0 24.9
AVERAGE DRBI1W 2026/04/24 2026 13.7 4.3 5.2 5.8 5.2 4.7 7.6 21.3 54.5 38.1 11.3 6.2 3.8 46.5 31.2 13.7
PCT AVG DRBI1W 2026/04/24 2026 181.2 121.6 128.3 224.7 173.7 146.9 200.3 174.0 179.4 181.2
NF Payette River - Cascade Dam (CSCI1W) [132450001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CSCI1W 2026/04/24 2026 97.4 29.8 29.1 68.7 54.7 41.1 63.4 384.3 256.6 97.4
AVERAGE CSCI1W 2026/04/24 2026 72.4 24.9 26.0 33.7 29.7 29.0 54.2 101.6 202.8 138.0 20.5 7.6 16.7 270.0 185.3 72.4
PCT AVG CSCI1W 2026/04/24 2026 134.5 119.7 112.0 203.9 184.0 141.9 116.8 142.3 138.4 134.5
Payette River - near Horseshoe Bend (HRSI1W) [132475001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HRSI1W 2026/04/24 2026 308.9 80.1 85.2 182.9 148.3 115.1 212.0 1132.5 784.3 308.9
AVERAGE HRSI1W 2026/04/24 2026 244.7 71.4 77.6 91.8 89.4 94.0 186.0 343.1 593.7 423.5 123.5 55.9 57.6 854.9 614.1 244.7
PCT AVG HRSI1W 2026/04/24 2026 126.2 112.2 109.8 199.3 165.8 122.5 114.0 132.5 127.7 126.2
Payette River - near Emmett (EMMI1W) [132495000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF EMMI1W 2026/04/24 2026 252.8 58.1 70.4 119.2 118.4 103.7 177.2 899.8 652.1 252.8
AVERAGE EMMI1W 2026/04/24 2026 216.7 56.0 69.1 86.1 98.1 108.4 203.0 291.7 400.8 345.8 140.4 98.4 48.2 837.5 626.3 216.7
PCT AVG EMMI1W 2026/04/24 2026 116.6 103.8 101.8 138.5 120.7 95.7 87.3 107.4 104.1 116.6
Weiser River - near Weiser (WSRI1W) [132660000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WSRI1W 2026/04/24 2026 107.8 9.6 10.8 51.5 60.6 45.9 81.8 367.9 296.1 107.8
AVERAGE WSRI1W 2026/04/24 2026 105.6 9.0 12.6 35.5 48.5 73.4 156.9 137.0 138.2 70.2 19.3 14.9 9.9 441.6 384.5 105.6
PCT AVG WSRI1W 2026/04/24 2026 102.1 106.0 85.6 145.0 124.9 62.5 52.1 83.3 77.0 102.1
Snake River - at Weiser (WEII1W) [132690000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WEII1W 2026/04/24 2026 738.1 696.4 598.5 703.0 696.6 594.0 720.8 4747.4 2749.5 738.1
AVERAGE WEII1W 2026/04/24 2026 1071.4 744.0 710.3 788.5 865.3 875.8 1250.8 1396.6 1477.5 1190.8 653.5 592.5 644.6 6306.1 4063.3 1071.4
PCT AVG WEII1W 2026/04/24 2026 68.9 93.6 84.3 89.2 80.5 67.8 57.6 75.3 67.7 68.9
Burnt River - near Hereford (UNYO3W) [132730001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF UNYO3W 2026/04/24 2026 1.9 1.7 2.5 3.6 3.0 3.5 5.6 21.6 13.9 1.9
AVERAGE UNYO3W 2026/04/24 2026 13.9 1.3 2.2 2.8 3.3 4.4 12.7 17.3 9.1 2.7 0.7 0.6 0.7 40.7 34.3 13.9
PCT AVG UNYO3W 2026/04/24 2026 13.6 127.0 111.2 126.8 90.9 77.6 43.8 53.1 40.4 13.6
Snake River - Brownlee Dam (BRNI1W) [132896002 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BRNI1W 2026/04/24 2026 771.7 708.1 618.6 764.0 775.3 651.4 760.6 5049.7 2958.9 771.7
AVERAGE BRNI1W 2026/04/24 2026 1157.5 760.6 728.1 817.2 912.3 937.4 1341.9 1511.1 1603.4 1307.9 702.6 611.0 662.4 6655.0 4349.1 1157.5
PCT AVG BRNI1W 2026/04/24 2026 66.7 93.1 85.0 93.5 85.0 69.5 56.7 75.9 68.0 66.7
Snake River - at Hells Canyon Dam (HCDI1W) [132904501 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF HCDI1W 2026/04/24 2026 803.4 711.9 622.7 779.3 788.5 659.2 824.9 5189.8 3075.9 803.4
AVERAGE HCDI1W 2026/04/24 2026 1227.6 773.4 743.9 853.5 963.3 994.6 1436.7 1601.9 1721.1 1375.0 731.0 617.1 679.0 6992.9 4622.1 1227.6
PCT AVG HCDI1W 2026/04/24 2026 65.4 92.0 83.7 91.3 81.9 66.3 57.4 74.2 66.5 65.4
Imnaha River - at Imnaha (IMNO3W) [132920000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF IMNO3W 2026/04/24 2026 29.4 7.8 9.7 18.8 16.8 11.4 27.1 121.0 84.7 29.4
AVERAGE IMNO3W 2026/04/24 2026 42.5 8.9 10.2 13.0 12.4 13.6 31.1 59.4 95.6 72.2 30.8 11.1 7.9 131.7 99.6 42.5
PCT AVG IMNO3W 2026/04/24 2026 69.3 86.9 95.4 144.6 135.5 83.7 87.0 91.9 85.1 69.3
Salmon River - at Salmon (SMNI1W) [133025000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SMNI1W 2026/04/24 2026 118.0 74.3 76.6 78.5 69.4 65.5 103.2 585.5 356.2 118.0
AVERAGE SMNI1W 2026/04/24 2026 75.7 76.5 75.7 67.8 65.0 59.0 73.0 108.4 255.0 309.2 137.8 62.2 55.9 492.7 272.7 75.7
PCT AVG SMNI1W 2026/04/24 2026 155.9 97.1 101.1 115.7 106.9 111.1 141.4 118.8 130.6 155.9
Salmon River - at Whitebird (WHBI1W) [133170000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WHBI1W 2026/04/24 2026 905.8 269.5 317.4 426.6 347.3 295.0 657.0 3218.4 2205.0 905.8
AVERAGE WHBI1W 2026/04/24 2026 556.6 283.3 295.7 280.0 264.6 259.5 414.0 829.1 2157.2 1949.5 678.1 303.1 240.8 2353.8 1494.8 556.6
PCT AVG WHBI1W 2026/04/24 2026 162.7 95.1 107.3 152.3 131.2 113.7 158.7 136.7 147.5 162.7
Grande Ronde River - near Perry (LGNO3W) [133190000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LGNO3W 2026/04/24 2026 27.9 0.9 1.3 14.8 12.6 7.4 26.9 91.8 74.8 27.9
AVERAGE LGNO3W 2026/04/24 2026 61.5 2.8 5.7 11.3 17.3 25.0 55.0 81.4 76.6 27.9 6.9 2.4 1.9 178.6 158.8 61.5
PCT AVG LGNO3W 2026/04/24 2026 45.3 33.2 22.4 131.8 72.8 29.5 49.0 51.4 47.1 45.3
Grande Ronde River - at Troy (TRYO3W) [133330000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF TRYO3W 2026/04/24 2026 202.8 36.0 43.0 174.6 145.9 110.3 297.6 1010.1 756.6 202.8
AVERAGE TRYO3W 2026/04/24 2026 295.7 48.4 68.9 100.1 129.3 184.8 304.7 390.2 447.4 304.5 109.2 42.1 38.0 1131.9 914.5 295.7
PCT AVG TRYO3W 2026/04/24 2026 68.6 74.3 62.5 174.4 112.8 59.7 97.7 89.2 82.7 68.6
Lostine River - near Lostine (LSTO3W) [133300000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LSTO3W 2026/04/24 2026 7.8 1.7 2.8 7.9 4.7 3.1 7.1 35.1 22.7 7.8
AVERAGE LSTO3W 2026/04/24 2026 6.5 2.8 4.2 3.3 3.1 3.1 4.6 9.7 32.8 43.7 21.8 5.0 2.6 27.6 17.3 6.5
PCT AVG LSTO3W 2026/04/24 2026 120.0 61.0 66.5 239.5 151.6 100.5 155.4 127.4 131.5 120.0
Clearwater River - at Orofino (ORFI1W) [133400000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ORFI1W 2026/04/24 2026 867.3 95.5 178.2 715.5 399.8 322.9 1024.6 3603.8 2614.6 867.3
AVERAGE ORFI1W 2026/04/24 2026 701.4 129.0 217.8 221.5 250.3 318.4 541.1 986.9 1800.4 1265.0 364.9 121.4 92.8 2379.5 1811.2 701.4
PCT AVG ORFI1W 2026/04/24 2026 123.7 74.0 81.8 323.1 159.7 101.4 189.3 151.5 144.4 123.7
NF Clearwater River - Dworshak Dam (DWRI1W) [133409501 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF DWRI1W 2026/04/24 2026 558.3 64.3 115.4 703.5 329.0 265.6 705.3 2741.4 1858.2 558.3
AVERAGE DWRI1W 2026/04/24 2026 501.3 98.2 173.3 184.7 205.5 272.4 442.4 686.0 978.2 630.0 179.5 79.9 66.0 1877.7 1421.6 501.3
PCT AVG DWRI1W 2026/04/24 2026 111.4 65.5 66.6 380.9 160.1 97.5 159.4 146.0 130.7 111.4
Clearwater River - at Spalding (SPDI1W) [133425001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SPDI1W 2026/04/24 2026 1458.4 160.2 299.7 1467.4 782.7 656.1 1914.8 6739.2 4812.0 1458.4
AVERAGE SPDI1W 2026/04/24 2026 1286.3 228.3 397.7 429.8 511.0 675.4 1110.5 1778.9 2856.3 1933.1 548.6 202.0 162.3 4638.9 3583.2 1286.3
PCT AVG SPDI1W 2026/04/24 2026 113.4 70.2 75.4 341.4 153.2 97.1 172.4 145.3 134.3 113.4
Snake River - Lower Granite Dam (LGDW1W) [133436001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF LGDW1W 2026/04/24 2026 3478.8 1136.6 1256.5 2833.2 2045.0 1722.7 3720.2 16193.1 10966.8 3478.8
AVERAGE LGDW1W 2026/04/24 2026 3493.4 1348.1 1524.8 1678.8 1903.3 2174.8 3402.3 4770.7 7338.8 5714.6 2122.0 1174.8 1110.9 15525.6 10973.8 3493.4
PCT AVG LGDW1W 2026/04/24 2026 99.6 84.3 82.4 168.8 107.4 79.2 109.3 104.3 99.9 99.6
Columbia River - McNary Dam (MCDW1W) [140193001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MCDW1W 2026/04/24 2026 10468.5 3233.3 4415.7 10483.8 6542.3 4944.2 11693.2 51781.1 33648.3 10468.5
AVERAGE MCDW1W 2026/04/24 2026 9720.9 4689.5 5122.7 4945.2 5169.4 5574.7 8437.5 13909.7 26908.0 25613.7 14294.5 7362.2 4697.5 43660.0 28902.5 9720.9
PCT AVG MCDW1W 2026/04/24 2026 107.7 68.9 86.2 212.0 126.6 88.7 138.6 118.6 116.4 107.7
Columbia River - McNary Dam (MCDW1) [140185600 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MCDW1 2026/04/24 2026 9270.2 5364.3 6517.4 10002.0 11512.4 9195.9 12488.5 64350.8 42467.0 9270.2
AVERAGE MCDW1 2026/04/24 2026 9170.0 6034.6 7046.9 8206.4 8985.9 8089.7 9461.0 12403.8 16902.4 16041.5 11316.6 8657.0 5688.7 56994.5 35706.6 9170.0
PCT AVG MCDW1 2026/04/24 2026 101.1 88.9 92.5 121.9 128.1 113.7 132.0 112.9 118.9 101.1
Umatilla River - near Gibbon (GIBO3W) [140200000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF GIBO3W 2026/04/24 2026 28.2 3.3 3.2 23.3 18.8 11.7 37.3 125.9 96.1 28.2
AVERAGE GIBO3W 2026/04/24 2026 27.2 3.3 7.1 13.7 18.0 21.0 28.5 35.5 28.3 9.9 3.5 2.7 2.6 118.7 94.6 27.2
PCT AVG GIBO3W 2026/04/24 2026 103.7 101.2 44.5 170.4 104.6 56.1 131.0 106.0 101.5 103.7
Umatilla River - at Pendleton (PDTO3W) [140210000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF PDTO3W 2026/04/24 2026 61.0 3.5 4.4 50.1 30.1 24.4 76.9 250.5 192.5 61.0
AVERAGE PDTO3W 2026/04/24 2026 62.0 4.3 12.8 31.7 44.1 52.9 75.9 77.8 52.8 17.5 4.3 2.6 2.8 283.7 234.8 62.0
PCT AVG PDTO3W 2026/04/24 2026 98.4 81.1 34.7 158.0 68.2 46.1 101.4 88.3 82.0 98.4
NF John Day River - at Monument (MONO3W) [140460000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MONO3W 2026/04/24 2026 91.5 8.0 10.5 56.3 46.2 37.1 81.5 331.2 256.3 91.5
AVERAGE MONO3W 2026/04/24 2026 169.0 9.2 15.1 37.6 59.2 87.1 171.4 223.1 221.1 87.6 18.7 7.4 6.1 548.6 486.8 169.0
PCT AVG MONO3W 2026/04/24 2026 54.2 87.9 69.4 150.0 78.1 42.6 47.5 60.4 52.7 54.2
John Day River - at Service Creek (SERO3W) [140465000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SERO3W 2026/04/24 2026 117.4 18.0 21.8 77.4 72.1 64.4 129.7 500.8 383.6 117.4
AVERAGE SERO3W 2026/04/24 2026 242.1 20.7 29.9 62.7 97.3 132.1 250.1 318.4 304.3 130.6 28.0 8.7 8.3 834.7 721.5 242.1
PCT AVG SERO3W 2026/04/24 2026 48.5 86.9 72.8 123.5 74.2 48.7 51.9 60.0 53.2 48.5
Columbia River - John Day Dam (JDAO3W) [140482001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF JDAO3W 2026/04/24 2026 10849.3 3303.7 4722.2 11131.8 7079.2 5370.6 12408.5 54865.3 35707.6 10849.3
AVERAGE JDAO3W 2026/04/24 2026 9990.7 4799.4 5343.8 5256.5 5580.2 5973.7 8925.5 14225.2 27024.8 25474.3 13911.8 7007.2 4708.3 45869.8 30470.1 9990.7
PCT AVG JDAO3W 2026/04/24 2026 108.6 68.8 88.4 211.8 126.9 89.9 139.0 119.6 117.2 108.6
Columbia River - John Day Dam (JDAO3) [140481000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF JDAO3 2026/04/24 2026 9660.1 5431.0 6817.9 10575.2 12081.2 9594.1 13226.7 67386.2 44562.0 9660.1
AVERAGE JDAO3 2026/04/24 2026 9392.1 6154.9 7201.9 8424.4 9412.6 8508.0 10181.4 12643.5 16982.1 15752.6 10885.4 8213.3 5678.2 59275.2 37494.0 9392.1
PCT AVG JDAO3 2026/04/24 2026 102.9 88.2 94.7 125.5 128.4 112.8 129.9 113.7 118.9 102.9
Deschutes River - at Moody near Briggs (MODO3W) [141030000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MODO3W 2026/04/24 2026 195.9 275.7 274.3 368.3 285.3 255.4 322.6 1977.5 1059.2 195.9
AVERAGE MODO3W 2026/04/24 2026 315.9 300.4 317.9 373.0 410.6 388.6 421.9 405.4 363.3 313.5 283.2 272.0 264.9 2528.3 1537.0 315.9
PCT AVG MODO3W 2026/04/24 2026 62.0 91.8 86.3 98.7 69.5 65.7 76.5 78.2 68.9 62.0
Columbia River - The Dalles Dam (TDAO3W) [141057001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF TDAO3W 2026/04/24 2026 10879.4 3556.1 4966.9 11357.2 7172.2 5451.1 12512.4 55895.3 36015.1 10879.4
AVERAGE TDAO3W 2026/04/24 2026 10297.6 5095.5 5649.7 5623.4 5992.4 6367.6 9354.4 14620.4 27376.0 25768.2 14168.6 7262.5 4967.6 48380.5 32012.0 10297.6
PCT AVG TDAO3W 2026/04/24 2026 105.7 69.8 87.9 202.0 119.7 85.6 133.8 115.5 112.5 105.7
Columbia River - The Dalles Dam (TDAO3) [141057001 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF TDAO3 2026/04/24 2026 9690.2 5683.4 7062.5 10800.7 12174.2 9674.6 13330.6 68416.2 44869.6 9690.2
AVERAGE TDAO3 2026/04/24 2026 9691.3 6442.2 7471.7 8767.9 9800.3 8848.3 10603.7 13033.4 17325.6 16083.0 11113.4 8455.5 5939.5 61625.4 38943.5 9691.3
PCT AVG TDAO3 2026/04/24 2026 100.0 88.2 94.5 123.2 124.2 109.3 125.7 111.0 115.2 100.0
Columbia River - Bonneville Dam (BONO3W) [141288701 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BONO3W 2026/04/24 2026 10795.2 3626.7 5232.9 12083.6 7210.0 5687.1 12904.0 57539.4 36596.2 10795.2
AVERAGE BONO3W 2026/04/24 2026 10499.6 5192.9 5813.8 5751.6 6231.7 6597.0 9670.3 14887.3 27521.3 25869.2 14400.1 7496.2 5025.1 49756.8 32998.6 10499.6
PCT AVG BONO3W 2026/04/24 2026 102.8 69.8 90.0 210.1 115.7 86.2 133.4 115.6 110.9 102.8
Columbia River - Bonneville Dam (BONO3) [141288500 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BONO3 2026/04/24 2026 9606.0 5754.0 7328.6 11527.0 12211.9 9910.6 13722.2 70060.2 45450.7 9606.0
AVERAGE BONO3 2026/04/24 2026 9907.8 6533.1 7656.8 8796.9 10035.3 8866.7 10945.9 13359.9 17530.8 16205.1 11300.6 8748.6 5962.2 62742.5 39755.7 9907.8
PCT AVG BONO3 2026/04/24 2026 97.0 88.1 95.7 131.0 121.7 111.8 125.4 111.7 114.3 97.0
McKenzie River - near Vida (VIDO3W) [141625000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF VIDO3W 2026/04/24 2026 149.3 112.6 128.4 360.1 235.3 164.6 279.1 1429.3 828.3 149.3
AVERAGE VIDO3W 2026/04/24 2026 265.2 130.8 239.1 362.3 377.7 300.6 342.4 341.5 296.2 203.6 136.7 113.2 103.9 2018.3 1285.9 265.2
PCT AVG VIDO3W 2026/04/24 2026 56.3 86.0 53.7 99.4 62.3 54.7 81.5 70.8 64.4 56.3
N Santiam River - at Mehama (MEHO3W) [141830000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MEHO3W 2026/04/24 2026 161.3 78.5 146.4 581.9 227.9 224.3 322.0 1742.1 935.4 161.3
AVERAGE MEHO3W 2026/04/24 2026 233.1 106.6 253.0 358.6 363.5 275.6 308.1 296.6 238.7 148.1 69.9 48.9 52.7 1898.5 1180.4 233.1
PCT AVG MEHO3W 2026/04/24 2026 69.2 73.6 57.9 162.3 62.7 81.4 104.5 91.8 79.2 69.2
S Santiam River - at Waterloo (WTLO3W) [141875000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF WTLO3W 2026/04/24 2026 145.6 35.4 75.7 461.6 182.5 197.9 274.5 1373.3 800.6 145.6
AVERAGE WTLO3W 2026/04/24 2026 211.5 68.3 227.2 357.0 354.8 255.3 292.0 264.8 175.4 91.7 26.5 12.9 18.9 1766.1 1113.7 211.5
PCT AVG WTLO3W 2026/04/24 2026 68.8 51.9 33.3 129.3 51.4 77.5 94.0 77.8 71.9 68.8
Willamette River - at Salem (SLMO3W) [141910000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SLMO3W 2026/04/24 2026 1051.8 310.1 542.9 2700.2 1446.0 1611.5 1835.8 9498.5 5945.2 1051.8
AVERAGE SLMO3W 2026/04/24 2026 1508.5 439.1 1368.8 2619.7 2794.8 2106.6 2217.9 1895.7 1320.1 774.5 334.3 214.4 214.4 13055.4 8627.9 1508.5
PCT AVG SLMO3W 2026/04/24 2026 69.7 70.6 39.7 103.1 51.7 76.5 82.8 72.8 68.9 69.7
Clackamas River - at Estacada (ESTO3W) [142100000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF ESTO3W 2026/04/24 2026 111.7 62.6 108.1 372.3 145.1 155.2 270.2 1225.1 682.1 111.7
AVERAGE ESTO3W 2026/04/24 2026 181.6 88.8 181.5 254.6 265.6 213.4 236.3 233.6 198.4 123.4 68.7 53.3 55.4 1421.7 896.9 181.6
PCT AVG ESTO3W 2026/04/24 2026 61.5 70.5 59.6 146.3 54.6 72.7 114.4 86.2 76.1 61.5
Lewis River - Merwin Dam (MEWW1W) [142205001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MEWW1W 2026/04/24 2026 185.2 91.0 305.7 886.6 335.2 314.6 580.0 2698.2 1414.9 185.2
AVERAGE MEWW1W 2026/04/24 2026 231.6 201.5 394.1 459.4 503.5 395.3 377.4 299.4 270.9 196.4 114.6 87.7 113.4 2562.8 1507.8 231.6
PCT AVG MEWW1W 2026/04/24 2026 79.9 45.2 77.6 193.0 66.6 79.6 153.7 105.3 93.8 79.9
Cowlitz River - Mayfield Reservoir (MYDW1W) [142380001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF MYDW1W 2026/04/24 2026 272.6 103.1 404.3 1431.9 451.6 305.1 856.0 3824.6 1885.4 272.6
AVERAGE MYDW1W 2026/04/24 2026 365.9 187.6 485.5 530.6 600.4 482.6 469.1 480.4 539.9 410.4 217.1 117.0 99.5 3121.6 1918.0 365.9
PCT AVG MYDW1W 2026/04/24 2026 74.5 55.0 83.3 269.9 75.2 63.2 182.5 122.5 98.3 74.5
Cowlitz River - at Castle Rock (CASW1W) [142430001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CASW1W 2026/04/24 2026 442.3 163.9 584.3 2057.7 867.3 578.5 1310.6 6004.7 3198.7 442.3
AVERAGE CASW1W 2026/04/24 2026 549.3 267.3 699.6 843.5 934.0 744.6 739.8 711.6 707.1 520.2 274.3 153.0 137.7 4778.2 2967.8 549.3
PCT AVG CASW1W 2026/04/24 2026 80.5 61.3 83.5 243.9 92.9 77.7 177.2 125.7 107.8 80.5
Dungeness River - near Sequim (DRSW1W) [120480000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF DRSW1W 2026/04/24 2026 13.0 8.7 32.2 52.5 31.9 19.7 26.1 184.1 90.7 13.0
AVERAGE DRSW1W 2026/04/24 2026 14.8 13.6 26.8 28.2 30.8 22.0 20.7 20.4 35.4 38.0 27.2 14.6 9.2 156.9 88.4 14.8
PCT AVG DRSW1W 2026/04/24 2026 88.1 64.2 120.1 186.2 103.5 89.8 125.7 117.3 102.7 88.1
Skagit River - near Concrete (CONW1W) [121940001 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CONW1W 2026/04/24 2026 611.6 359.5 1381.5 2390.1 1238.1 758.5 1425.7 8164.8 4033.8 611.6
AVERAGE CONW1W 2026/04/24 2026 614.8 666.2 1120.9 855.0 926.9 705.3 736.9 861.2 1522.0 1494.3 1081.4 590.4 408.0 5626.0 2983.9 614.8
PCT AVG CONW1W 2026/04/24 2026 99.5 54.0 123.2 279.5 133.6 107.5 193.5 145.1 135.2 99.5
Rogue River - at Raygold (RYGO3W) [143590000 Adjusted Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF RYGO3W 2026/04/24 2026 103.6 86.1 85.3 163.0 138.3 160.9 163.2 900.3 566.0 103.6
AVERAGE RYGO3W 2026/04/24 2026 192.9 82.3 119.2 244.7 273.4 223.9 255.6 248.6 216.0 136.2 85.9 72.1 72.1 1392.0 945.8 192.9
PCT AVG RYGO3W 2026/04/24 2026 53.7 104.6 71.6 66.6 50.6 71.9 63.8 64.7 59.8 53.7
Silvies River - near Burns (BUSO3W) [103935000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF BUSO3W 2026/04/24 2026 6.5 1.7 2.0 3.9 5.7 5.6 10.8 36.2 28.6 6.5
AVERAGE BUSO3W 2026/04/24 2026 29.0 1.2 1.7 2.9 5.7 8.1 24.7 37.4 22.6 8.0 1.9 0.8 0.8 73.2 67.4 29.0
PCT AVG BUSO3W 2026/04/24 2026 22.5 138.6 115.4 137.3 101.3 68.6 43.9 49.5 42.5 22.5
Falls River - near Chester (CHEI1W) [130495000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF CHEI1W 2026/04/24 2026 40.1 28.0 28.2 35.8 32.6 25.2 44.9 234.9 142.9 40.1
AVERAGE CHEI1W 2026/04/24 2026 37.9 31.4 33.0 31.0 29.2 25.7 31.7 57.6 135.0 105.8 30.5 23.2 24.9 219.9 124.5 37.9
PCT AVG CHEI1W 2026/04/24 2026 106.0 89.4 85.4 115.5 111.7 98.1 141.5 106.8 114.8 106.0
Moyie River - at Eastport (EASI1W) [123065000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF EASI1W 2026/04/24 2026 68.9 3.4 10.4 58.8 32.5 20.7 62.6 257.4 184.8 68.9
AVERAGE EASI1W 2026/04/24 2026 50.7 7.7 15.0 13.1 10.1 11.7 26.8 77.8 176.4 102.1 26.0 7.5 4.8 135.2 99.3 50.7
PCT AVG EASI1W 2026/04/24 2026 136.0 43.6 69.4 450.2 321.3 176.6 233.6 190.4 186.0 136.0
Salmon Falls Creek - near San Jacin (SFLN2W) [131050000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF SFLN2W 2026/04/24 2026 3.3 2.7 2.9 3.8 4.1 3.8 5.6 26.3 16.8 3.3
AVERAGE SFLN2W 2026/04/24 2026 14.3 2.9 3.3 3.6 4.3 6.3 11.4 20.0 27.1 14.0 3.5 1.4 1.9 46.0 36.2 14.3
PCT AVG SFLN2W 2026/04/24 2026 23.1 92.2 88.7 107.5 94.9 59.7 49.7 57.0 46.3 23.1
Donner und Blitzen River - near Frenchglen (DONO3W) [103960000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF DONO3W 2026/04/24 2026 5.7 3.1 3.0 4.1 4.1 3.3 6.1 29.4 19.1 5.7
AVERAGE DONO3W 2026/04/24 2026 9.0 2.5 2.6 3.4 4.1 4.0 8.8 12.5 23.8 15.8 5.3 2.7 2.4 34.3 25.8 9.0
PCT AVG DONO3W 2026/04/24 2026 62.6 123.6 117.8 122.8 100.3 83.0 69.6 85.8 74.0 62.6
Eagle Creek - above Skull Creek (EGCO3W) [132882000 Observed Runoff]
HB5 ID OBS DATE WY CURR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Oct1-Apr24 Jan1-Apr24 Apr1-Apr24
RUNOFF EGCO3W 2026/04/24 2026 17.6 5.2 7.1 12.3 9.0 6.9 14.8 72.9 48.3 17.6
AVERAGE EGCO3W 2026/04/24 2026 18.7 5.5 7.1 7.3 7.2 6.7 12.7 26.8 59.0 53.0 21.9 7.9 5.4 65.2 45.4 18.7
PCT AVG EGCO3W 2026/04/24 2026 94.3 95.9 100.6 167.8 124.6 102.5 116.3 111.9 106.5 94.3
Report created 2026/04/24