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Water Supply Forecasts Northwest River Forecast Center Tuesday April 07, 2009 at 14:04 GMT Full month of observed precipitation Future precip assumed to be normal Snow included in this run Full complement runoff applied through MAR UPPER COLUMBIA BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 8880.0 92 10200.0 106 7550.0 78 9619. 9199 1910 94 FEB-JUL 8640.0 92 9970.0 106 7320.0 78 9372. 8909 1910 94 APR-SEP 11600.0 93 12900.0 103 10200.0 82 12500. 11570 1910 94 REVELSTOKE, BC JAN-JUL 12800.0 92 14000.0 101 11700.0 84 13880. 13420 2899 98 ARROW LAKES INFLOW JAN-JUL 19100.0 91 21200.0 101 17100.0 82 20960. 19230 4583 87 FEB-JUL 18500.0 91 20500.0 101 16400.0 81 20230. 18670 4583 87 APR-SEP 23200.0 92 25300.0 101 21100.0 84 25110. 22910 4583 87 BIRCHBANK, BC (1) JAN-JUL 34500.0 89 39700.0 102 29200.0 75 38930. 36130 8202 88 APR-SEP 39000.0 90 44300.0 102 33800.0 78 43500. 40800 8202 88 GRAND COULEE, WA (1) JAN-JUL 56200.0 89 64800.0 103 47700.0 76 62900. 59650 14170 82 APR-SEP 58700.0 92 67200.0 105 50100.0 78 63990. 62860 14170 82 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 61200.0 89 70600.0 102 51700.0 75 68910. 64110 15560 82 APR-SEP 63200.0 91 72600.0 104 53800.0 77 69540. 67150 15560 82 THE DALLES NR, OR (1) JAN-JUL 92000.0 86 106000.0 99 78400.0 73 107300. 99210 31570 80 APR-AUG 82400.0 89 96000.0 103 68800.0 74 93090. 93200 31570 80 APR-SEP 87200.0 88 101000.0 102 73600.0 75 98650. 97910 31570 80 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5430.0 86 6730.0 107 4130.0 65 6306. 5516 1162 74 APR-AUG 5500.0 88 6800.0 109 4200.0 67 6248. 5539 1162 74 APR-SEP 5840.0 88 7140.0 108 4540.0 68 6638. 5887 1162 74 LEONIA, ID (1) APR-JUL 6200.0 88 7780.0 110 4620.0 66 7041. 6568 1447 67 APR-SEP 7150.0 88 8730.0 107 5570.0 69 8125. 7516 1447 67 BONNERS FERRY, ID APR-JUL 6700.0 88 8250.0 108 5150.0 68 7619. 7099 1534 66 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 13400.0 84 15700.0 98 11000.0 69 16010. 14250 2901 74 APR-SEP 14100.0 86 16800.0 102 11400.0 69 16450. 15060 2901 74 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1650.0 92 2020.0 112 1270.0 71 1800. 1691 387 102 FEB-JUL 1600.0 92 1970.0 113 1220.0 70 1746. 1638 387 102 APR-SEP 2040.0 92 2420.0 109 1670.0 75 2227. 2111 387 102 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 760.0 108 1090.0 155 425.0 60 704. 852 392 114 MISSOULA ABV, MT APR-SEP 1750.0 110 2210.0 139 1290.0 81 1595. 1798 677 116 MISSOULA BLO, MT APR-SEP 3180.0 107 3870.0 131 2480.0 84 2962. 3420 1099 113 ST. REGIS, MT (1) APR-SEP 4100.0 105 5170.0 132 3030.0 78 3907. 4509 1463 110 PLAINS NR, MT (1) APR-SEP 10600.0 96 12900.0 117 8360.0 76 11060. 12090 2809 90 WHITEHORSE RAPIDS, ID (1) APR-SEP 12100.0 97 14700.0 118 9440.0 76 12460. 13630 2984 80 BLACKFOOT RIVER BONNER NR, MT APR-SEP 985.0 110 1270.0 142 695.0 78 892. 946 285 119 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1420.0 104 1710.0 125 1140.0 84 1364. 1597 457 117 Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1510.0 84 1870.0 104 1160.0 64 1801. 1865 231 64 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1600.0 92 1890.0 109 1310.0 75 1740. 2103 225 65 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2100.0 94 2540.0 114 1660.0 75 2224. 2506 415 90 APR-SEP 2040.0 96 2480.0 117 1590.0 75 2124. 2530 415 90 UPPER/MIDDLE COLUMBIA BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5290.0 91 6560.0 113 4020.0 69 5825. 6676 871 71 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6130.0 91 7510.0 112 4750.0 71 6713. 7562 1431 92 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 775.0 95 995.0 122 555.0 68 814. 849 211 59 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 13300.0 96 16200.0 116 10400.0 75 13910. 15810 3873 84 APR-JUL 12200.0 96 15100.0 119 9270.0 73 12740. 14580 3873 84 BOX CANYON BLO, WA (1) APR-SEP 13600.0 97 16600.0 118 10600.0 75 14090. 16110 4001 84 KETTLE RIVER LAURIER NR, WA APR-SEP 1680.0 85 2050.0 104 1310.0 66 1972. 1517 172 63 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 810.0 104 1010.0 130 615.0 79 778. 1302 350 60 APR-JUL 770.0 104 965.0 131 575.0 78 739. 1258 350 60 COEUR D'ALENE LAKE IN, ID APR-JUL 2540.0 100 3170.0 124 1910.0 75 2552. 3826 1620 83 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2770.0 101 2850.0 104 2690.0 98 2744. 4128 1657 83 ST JOE RIVER CALDER, ID APR-SEP 1180.0 98 1410.0 117 950.0 79 1205. 1656 487 95 APR-JUL 1110.0 98 1350.0 119 885.0 78 1136. 1571 487 95 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1040.0 59 1600.0 91 480.0 27 1766. 1542 355 73 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 800.0 59 1170.0 87 435.0 32 1350. 1189 239 88 APR-SEP 860.0 59 1230.0 85 495.0 34 1450. 1259 239 88 METHOW RIVER PATEROS NR, WA (1) APR-SEP 620.0 63 865.0 88 375.0 38 985. 926 189 106 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 850.0 72 1030.0 87 675.0 57 1185. 1157 346 105 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1300.0 80 1830.0 112 770.0 47 1635. 1521 677 107 YAKIMA AND MAINSTEM SNAKE BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 118.0 89 144.0 108 91.0 68 133. 174 110 91 CLE ELUM, WA APR-SEP 770.0 85 870.0 96 665.0 74 903. 1013 676 107 PARKER NR, WA APR-SEP 1750.0 91 1970.0 103 1530.0 80 1918. 2325 1437 96 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 105.0 88 124.0 103 85.0 71 120. 150 95 94 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 400.0 89 455.0 102 350.0 78 448. 479 248 104 NACHES RIVER NACHES NR, WA APR-SEP 720.0 86 815.0 97 625.0 75 837. 991 481 102 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 120.0 90 138.0 103 103.0 77 134. 155 67 88 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 220.0 91 255.0 105 190.0 79 242. 247 129 89 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 38.0 83 55.0 120 21.0 46 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 835.0 102 975.0 120 695.0 85 815. 894 175 84 APR-SEP 925.0 102 1070.0 118 785.0 87 904. 970 175 84 PALISADES RES INFLOW, ID (1) APR-JUL 3360.0 101 3900.0 117 2810.0 84 3331. 3352 1005 91 APR-SEP 3910.0 101 4450.0 115 3370.0 87 3875. 3850 1005 91 HEISE NR, ID APR-JUL 3600.0 101 4200.0 118 2990.0 84 3561. 3644 1220 97 APR-SEP 4200.0 101 4810.0 116 3590.0 86 4159. 4282 1220 97 SHELLEY NR, ID (1) APR-JUL 4560.0 103 5290.0 119 3830.0 86 4428. 4541 1848 99 APR-SEP 5480.0 103 6220.0 117 4750.0 89 5324. 5320 1848 99 BLACKFOOT NR, ID (1) APR-JUL 4590.0 100 5350.0 116 3830.0 83 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 3040.0 94 4110.0 127 1980.0 61 3242. 2731 2129 82 MILNER, ID APR-JUL 1010.0 82 1870.0 152 265.0 22 1228. 160 222 14 KING HILL, ID (1) APR-JUL 2480.0 81 3440.0 113 1530.0 50 3045. 1765 2439 56 MURPHY NR, ID (1) APR-JUL 2650.0 86 3640.0 118 1650.0 53 3092. 1549 2709 60 WEISER, ID (1) JAN-JUL 6470.0 66 8220.0 84 4720.0 48 9793. 5966 3803 55 APR-JUL 4550.0 79 6290.0 109 2800.0 49 5765. 3926 3803 55 APR-SEP 5980.0 83 7730.0 107 4230.0 59 7192. 5218 3803 55 BROWNLEE RES INFLOW APR-JUL 4970.0 79 7130.0 113 2810.0 45 6313. 4367 4317 58 APR-SEP 6400.0 82 8560.0 110 4240.0 54 7801. 5699 4317 58 HELLS CANYON, ID (1) APR-JUL 5050.0 78 6990.0 108 3100.0 48 6493. 4738 4397 59 APR-SEP 6500.0 81 8440.0 106 4550.0 57 7977. 6060 4397 59 LOWER GRANITE RES IN, WA (1) JAN-JUL 26400.0 88 31300.0 104 21500.0 72 30020. 27520 10280 75 FEB-SEP 26800.0 88 31700.0 104 21800.0 72 30370. 28890 10280 75 APR-JUL 20400.0 95 25300.0 117 15500.0 72 21550. 22830 10280 75 APR-SEP 22700.0 94 27600.0 114 17800.0 74 24140. 25390 10280 75 UPPER SNAKE BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 420.0 107 490.0 124 350.0 89 394. 389 88 96 SALT RIVER ETNA NR, WY APR-JUL 350.0 102 450.0 132 250.0 73 342. 311 181 96 HENRYS FORK ASHTON NR, ID APR-JUL 495.0 87 615.0 108 375.0 66 571. 518 462 91 ST. ANTHONY, ID APR-JUL 610.0 83 830.0 113 400.0 54 734. 703 551 92 REXBURG NR, ID APR-JUL 1320.0 85 1670.0 107 985.0 63 1559. 905 684 70 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 335.0 87 400.0 104 265.0 69 386. 308 94 55 TETON RIVER ST. ANTHONY NR, ID APR-JUL 345.0 86 460.0 114 225.0 56 403. 445 167 96 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 118.0 83 175.0 123 60.0 42 142. 80 53 72 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 89.0 103 121.0 141 58.0 67 86. 41 13 55 PORTNEUF RIVER TOPAZ, ID APR-SEP 81.0 85 102.0 107 59.0 62 95. 61 43 69 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 24.0 83 37.0 128 9.9 34 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 196.0 77 280.0 109 110.0 43 256. 185 60 87 MAGIC RESERVOIR INFLOW, ID APR-JUL 199.0 68 315.0 108 82.0 28 291. 172 34 42 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 66.0 76 96.0 110 37.0 43 87. 50 21 71 MIDDLE SNAKE BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 205.0 99 305.0 147 108.0 52 208. 155 45 61 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 400.0 65 605.0 99 188.0 31 613. 452 229 53 OWYHEE RES OUTFLOW APR-JUL 14.1 6 100.0 46 1.2 217. 53 16 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 530.0 83 650.0 102 410.0 64 636. 655 174 81 BOISE NR, ID (1) APR-JUL 1140.0 81 1440.0 102 845.0 60 1414. 1290 379 69 PARMA NR, ID APR-JUL 355.0 60 625.0 105 133.0 22 593. 319 299 51 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 430.0 79 535.0 99 325.0 60 542. 442 116 77 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 73.0 66 108.0 98 39.0 35 110. 85 36 46 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 60.0 74 77.0 95 44.0 54 81. 80 28 57 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1310.0 81 1680.0 104 935.0 58 1617. 1701 483 74 EMMETT NR, ID APR-JUL 1020.0 82 1420.0 114 615.0 49 1246. 1394 444 59 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 109.0 81 134.0 100 84.0 63 134. 141 27 81 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 395.0 80 515.0 104 280.0 57 495. 525 155 74 WEISER RIVER WEISER NR, ID (1) APR-JUL 320.0 82 495.0 127 145.0 37 391. 479 194 50 BURNT RIVER HEREFORD NR, OR MAR-JUL 36.0 71 50.0 98 21.0 41 51. 57 22 69 LOWER SNAKE AND CENTRAL OREGON BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 57.0 81 72.0 103 43.0 61 70. 80 IMNAHA RIVER IMNAHA, OR MAR-JUL 255.0 85 330.0 110 176.0 58 301. 337 80 84 SALMON RIVER SALMON, ID (1) APR-JUL 795.0 93 1110.0 130 485.0 57 857. 806 411 92 WHITEBIRD, ID (1) JAN-JUL 6480.0 95 7870.0 116 5090.0 75 6805. 7310 1636 88 APR-JUL 5660.0 97 7050.0 120 4270.0 73 5851. 6560 1636 88 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 235.0 94 295.0 118 172.0 69 249. 347 109 79 APR-JUL 185.0 101 245.0 133 124.0 67 184. 301 109 79 TROY, OR (1) MAR-JUL 1520.0 96 1920.0 122 1110.0 70 1578. 1971 741 83 APR-JUL 1240.0 97 1650.0 130 835.0 66 1274. 1761 741 83 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 4950.0 107 6220.0 134 3680.0 79 4645. 5729 1723 104 SPALDING, ID (1) JAN-JUL 9880.0 102 11700.0 121 8100.0 84 9683. 10500 3087 93 APR-JUL 7910.0 106 9690.0 130 6130.0 82 7435. 9382 3087 93 APR-SEP 8330.0 106 10100.0 129 6550.0 83 7849. 9851 3087 93 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3490.0 98 4110.0 116 2870.0 81 3547. 3823 1216 90 APR-JUL 2710.0 102 3330.0 126 2090.0 79 2644. 3434 1216 90 APR-SEP 2870.0 102 3490.0 125 2250.0 80 2803. 3659 1216 90 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 54.0 102 66.0 125 43.0 81 53. 92 63 102 UMATILLA RIVER GIBBON NR, OR APR-JUL 84.0 115 110.0 151 59.0 81 73. 127 86 93 PENDLETON, OR APR-JUL 170.0 114 235.0 158 104.0 70 149. 285 207 91 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 149.0 93 194.0 121 105.0 66 160. 0 APR-JUL 115.0 93 160.0 130 71.0 58 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 545.0 91 750.0 126 335.0 56 597. 883 264 59 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1050.0 91 1400.0 121 705.0 61 1153. 1362 406 57 APR-SEP 855.0 99 1200.0 139 505.0 58 865. 1152 406 57 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 500.0 95 535.0 101 460.0 87 528. 504 522 107 Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 136.0 74 194.0 105 77.0 42 184. 143 54 33 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 26.0 72 41.0 114 11.3 31 36. 33 WESTSIDE AND SOUTHERN OREGON BASINS Apr-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 5090.0 80 6330.0 99 3840.0 60 6365. 6790 3788 80 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3100.0 96 3970.0 123 2230.0 69 3217. 3468 2446 90 APR-JUL 1580.0 94 2450.0 145 710.0 42 1689. 2328 2446 90 APR-SEP 1800.0 94 2670.0 139 925.0 48 1922. 2615 2446 90 CASTLE ROCK, WA APR-SEP 2500.0 95 3700.0 140 1290.0 49 2639. 3330 3614 85 JAN-JUL 4550.0 97 5750.0 122 3340.0 71 4709. 4998 3614 85 LEWIS RIVER ARIEL, WA JAN-JUL 2150.0 91 2510.0 107 1780.0 76 2351. 2397 1719 72 MCKENZIE RIVER VIDA NR, OR APR-SEP 1150.0 96 1410.0 117 890.0 74 1201. 1674 1660 90 S. SANTIAM RIVER WATERLOO, OR APR-SEP 615.0 105 865.0 147 365.0 62 587. 895 1363 83 N. SANTIAM RIVER MEHAMA, OR APR-SEP 850.0 102 1090.0 131 615.0 74 834. 1413 1510 89 WILLAMETTE RIVER SALEM, OR APR-SEP 4810.0 100 6360.0 132 3270.0 68 4804. 6084 9243 74 CLACKAMAS RIVER ESTACADA, OR APR-SEP 800.0 107 960.0 128 640.0 86 748. 1174 1066 80 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 145.0 96 182.0 121 108.0 72 151. 164 127 93 JAN-JUL 172.0 95 210.0 116 135.0 75 181. 180 127 93 ROGUE RIVER RAYGOLD, OR APR-SEP 780.0 88 910.0 102 650.0 73 889. 1076 1039 76 JAN-JUL 1330.0 84 1460.0 92 1200.0 76 1584. 1697 1039 76 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 69.0 78 105.0 118 33.0 37 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 101.0 78 165.0 128 37.0 29 129. 79 29 48 APR-SEP 85.0 86 148.0 149 21.0 21 99. 82 29 48 Forecasts are selected from those prepared by: National Weather Service Natural Resource Conservation Service B.C. Hydro and Power Authority. Project inflow forecasts have been coordinated with the U.S. Army Corp of Engineers and U.S. Bureau of Reclamation. All forecasts are in thousands of acre-feet. All averages are for the period 1971 through 2000 NOAA/NWS/Northwest River Forecast Center NNNN $$
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