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Water Supply Forecasts Northwest River Forecast Center Thursday May 07, 2009 at 14:09 GMT Full month of observed precipitation Future precip assumed to be normal Snow included in this run Full complement runoff applied through APR UPPER COLUMBIA BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 8660.0 90 9960.0 104 7370.0 77 9619. 9199 2222 87 FEB-JUL 8430.0 90 9720.0 104 7130.0 76 9372. 8909 2222 87 APR-SEP 11300.0 90 12600.0 101 9970.0 80 12500. 11570 2222 87 REVELSTOKE, BC JAN-JUL 12400.0 89 13400.0 97 11400.0 82 13880. 13420 3401 91 ARROW LAKES INFLOW JAN-JUL 18500.0 88 20500.0 98 16500.0 79 20960. 19230 5487 81 FEB-JUL 17900.0 88 19900.0 98 15900.0 79 20230. 18670 5487 81 APR-SEP 22400.0 89 24400.0 97 20400.0 81 25110. 22910 5487 81 BIRCHBANK, BC (1) JAN-JUL 33500.0 86 38000.0 98 29100.0 75 38930. 36130 10340 82 APR-SEP 37800.0 87 42300.0 97 33400.0 77 43500. 40800 10340 82 GRAND COULEE, WA (1) JAN-JUL 55000.0 87 61800.0 98 48300.0 77 62900. 59650 19940 81 APR-SEP 57300.0 90 64000.0 100 50500.0 79 63990. 62860 19940 81 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 60200.0 87 68000.0 99 52400.0 76 68910. 64110 21710 81 APR-SEP 62100.0 89 69900.0 101 54300.0 78 69540. 67150 21710 81 THE DALLES NR, OR (1) JAN-JUL 91100.0 85 102000.0 95 80200.0 75 107300. 99210 44170 82 APR-AUG 81400.0 87 92300.0 99 70500.0 76 93090. 93200 44170 82 APR-SEP 86300.0 87 97200.0 99 75400.0 76 98650. 97910 44170 82 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5220.0 83 6420.0 102 4020.0 64 6306. 5516 1469 71 APR-AUG 5270.0 84 6470.0 104 4070.0 65 6248. 5539 1469 71 APR-SEP 5590.0 84 6790.0 102 4390.0 66 6638. 5887 1469 71 LEONIA, ID (1) APR-JUL 5950.0 85 7430.0 106 4470.0 63 7041. 6568 2056 68 APR-SEP 6870.0 85 8350.0 103 5390.0 66 8125. 7516 2056 68 BONNERS FERRY, ID APR-JUL 6430.0 84 7880.0 103 4990.0 65 7619. 7099 2225 66 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 13000.0 81 15200.0 95 10900.0 68 16010. 14250 3936 71 APR-SEP 13700.0 83 16200.0 98 11300.0 69 16450. 15060 3936 71 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1610.0 89 1970.0 109 1250.0 69 1800. 1691 457 93 FEB-JUL 1560.0 89 1920.0 110 1200.0 69 1746. 1638 457 93 APR-SEP 1990.0 89 2350.0 106 1630.0 73 2227. 2111 457 93 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 805.0 114 1020.0 145 580.0 82 704. 852 534 122 MISSOULA ABV, MT APR-SEP 1810.0 113 2190.0 137 1420.0 89 1595. 1798 1018 126 MISSOULA BLO, MT APR-SEP 3250.0 110 3850.0 130 2640.0 89 2962. 3420 1592 118 ST. REGIS, MT (1) APR-SEP 4170.0 107 5070.0 130 3270.0 84 3907. 4509 2110 113 PLAINS NR, MT (1) APR-SEP 10500.0 95 12400.0 112 8640.0 78 11060. 12090 4282 94 WHITEHORSE RAPIDS, ID (1) APR-SEP 12000.0 96 14300.0 115 9690.0 78 12460. 13630 4654 85 BLACKFOOT RIVER BONNER NR, MT APR-SEP 1000.0 112 1250.0 140 755.0 85 892. 946 484 132 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1390.0 102 1650.0 121 1130.0 83 1364. 1597 624 115 May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1440.0 80 1760.0 98 1120.0 62 1801. 1865 393 69 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1570.0 90 1830.0 105 1310.0 75 1740. 2103 412 76 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2050.0 92 2480.0 112 1620.0 73 2224. 2506 701 93 APR-SEP 1990.0 94 2420.0 114 1560.0 73 2124. 2530 701 93 UPPER/MIDDLE COLUMBIA BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5150.0 88 6190.0 106 4110.0 71 5825. 6676 1527 79 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6010.0 90 7300.0 109 4720.0 70 6713. 7562 2270 94 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 750.0 92 950.0 117 550.0 68 814. 849 357 64 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 13200.0 95 15700.0 113 10700.0 77 13910. 15810 6009 89 APR-JUL 12100.0 95 14600.0 115 9580.0 75 12740. 14580 6009 89 BOX CANYON BLO, WA (1) APR-SEP 13500.0 96 16000.0 114 10900.0 77 14090. 16110 6164 88 KETTLE RIVER LAURIER NR, WA APR-SEP 1680.0 85 2030.0 103 1330.0 67 1972. 1517 329 54 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 795.0 102 955.0 123 635.0 82 778. 1302 662 75 APR-JUL 755.0 102 915.0 124 590.0 80 739. 1258 662 75 COEUR D'ALENE LAKE IN, ID APR-JUL 2440.0 96 2970.0 116 1920.0 75 2552. 3826 2627 93 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2670.0 97 2740.0 100 2590.0 94 2744. 4128 2648 92 ST JOE RIVER CALDER, ID APR-SEP 1100.0 91 1290.0 107 915.0 76 1205. 1656 754 94 APR-JUL 1040.0 92 1220.0 107 850.0 75 1136. 1571 754 94 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1170.0 66 1690.0 96 655.0 37 1766. 1542 428 65 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 860.0 64 1200.0 89 525.0 39 1350. 1189 304 77 APR-SEP 925.0 64 1260.0 87 590.0 41 1450. 1259 304 77 METHOW RIVER PATEROS NR, WA (1) APR-SEP 650.0 66 880.0 89 420.0 43 985. 926 255 91 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 900.0 76 1050.0 89 760.0 64 1185. 1157 446 96 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1340.0 82 1850.0 113 825.0 50 1635. 1521 835 97 YAKIMA AND MAINSTEM SNAKE BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 120.0 90 146.0 110 93.0 70 133. 174 131 87 CLE ELUM, WA APR-SEP 830.0 92 945.0 105 720.0 80 903. 1013 861 105 PARKER NR, WA APR-SEP 1800.0 94 2020.0 105 1570.0 82 1918. 2325 1859 97 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 108.0 90 126.0 105 91.0 76 120. 150 117 91 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 410.0 92 460.0 103 360.0 80 448. 479 307 98 NACHES RIVER NACHES NR, WA APR-SEP 760.0 91 880.0 105 645.0 77 837. 991 649 103 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 124.0 93 147.0 110 100.0 75 134. 155 81 84 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 225.0 93 260.0 107 191.0 79 242. 247 161 89 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 40.0 87 56.0 122 24.0 52 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 885.0 109 1010.0 124 755.0 93 815. 894 229 85 APR-SEP 980.0 108 1110.0 123 855.0 95 904. 970 229 85 PALISADES RES INFLOW, ID (1) APR-JUL 3600.0 108 4060.0 122 3130.0 94 3331. 3352 1364 94 APR-SEP 4190.0 108 4650.0 120 3730.0 96 3875. 3850 1364 94 HEISE NR, ID APR-JUL 3860.0 108 4360.0 122 3350.0 94 3561. 3644 1651 100 APR-SEP 4510.0 108 5010.0 120 4010.0 96 4159. 4282 1651 100 SHELLEY NR, ID (1) APR-JUL 4850.0 110 5500.0 124 4210.0 95 4428. 4541 2412 102 APR-SEP 5830.0 110 6480.0 122 5190.0 97 5324. 5320 2412 102 BLACKFOOT NR, ID (1) APR-JUL 4780.0 104 5440.0 118 4130.0 90 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 3240.0 100 4180.0 129 2290.0 71 3242. 2731 2529 79 MILNER, ID APR-JUL 1170.0 95 1920.0 156 410.0 33 1228. 160 734 36 KING HILL, ID (1) APR-JUL 2620.0 86 3500.0 115 1740.0 57 3045. 1765 3343 64 MURPHY NR, ID (1) APR-JUL 2780.0 90 3710.0 120 1840.0 60 3092. 1549 3596 66 WEISER, ID (1) JAN-JUL 6490.0 66 8060.0 82 4920.0 50 9793. 5966 5007 57 APR-JUL 4570.0 79 6140.0 107 3010.0 52 5765. 3926 5007 57 APR-SEP 6000.0 83 7570.0 105 4430.0 62 7192. 5218 5007 57 BROWNLEE RES INFLOW APR-JUL 5000.0 79 6900.0 109 3100.0 49 6313. 4367 5641 60 APR-SEP 6310.0 81 8210.0 105 4410.0 57 7801. 5699 5641 60 HELLS CANYON, ID (1) APR-JUL 5080.0 78 6820.0 105 3340.0 51 6493. 4738 5780 61 APR-SEP 6530.0 82 8270.0 104 4790.0 60 7977. 6060 5780 61 LOWER GRANITE RES IN, WA (1) JAN-JUL 26900.0 90 31000.0 103 22700.0 76 30020. 27520 15180 81 FEB-SEP 27300.0 90 31400.0 103 23100.0 76 30370. 28890 15180 81 APR-JUL 20900.0 97 25000.0 116 16700.0 77 21550. 22830 15180 81 APR-SEP 23200.0 96 27300.0 113 19000.0 79 24140. 25390 15180 81 UPPER SNAKE BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 450.0 114 500.0 127 400.0 102 394. 389 128 97 SALT RIVER ETNA NR, WY APR-JUL 385.0 113 465.0 136 300.0 88 342. 311 245 98 HENRYS FORK ASHTON NR, ID APR-JUL 540.0 95 660.0 116 425.0 74 571. 518 565 90 ST. ANTHONY, ID APR-JUL 705.0 96 870.0 119 540.0 74 734. 703 677 92 REXBURG NR, ID APR-JUL 1440.0 92 1700.0 109 1180.0 76 1559. 905 823 68 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 360.0 93 425.0 110 295.0 76 386. 308 115 53 TETON RIVER ST. ANTHONY NR, ID APR-JUL 380.0 94 460.0 114 300.0 74 403. 445 210 96 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 114.0 80 148.0 104 81.0 57 142. 80 61 71 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 89.0 103 118.0 137 60.0 70 86. 41 32 67 PORTNEUF RIVER TOPAZ, ID APR-SEP 77.0 81 89.0 94 65.0 68 95. 61 55 69 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 26.0 90 36.0 124 15.0 52 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 190.0 74 270.0 105 111.0 43 256. 185 85 85 MAGIC RESERVOIR INFLOW, ID APR-JUL 184.0 63 285.0 98 84.0 29 291. 172 78 47 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 62.0 71 87.0 100 37.0 43 87. 50 35 65 MIDDLE SNAKE BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 200.0 96 280.0 135 123.0 59 208. 155 90 75 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 385.0 63 535.0 87 235.0 38 613. 452 350 58 OWYHEE RES OUTFLOW APR-JUL 12.4 6 30.0 14 3.5 2 217. 53 27 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 540.0 85 650.0 102 430.0 68 636. 655 307 90 BOISE NR, ID (1) APR-JUL 1140.0 81 1380.0 98 895.0 63 1414. 1290 666 75 PARMA NR, ID APR-JUL 355.0 60 570.0 96 139.0 23 593. 319 332 42 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 415.0 77 515.0 95 310.0 57 542. 442 205 78 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 56.0 51 66.0 60 46.0 42 110. 85 54 46 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 50.0 62 58.0 72 43.0 53 81. 80 42 59 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1300.0 80 1620.0 100 975.0 60 1617. 1701 765 78 EMMETT NR, ID APR-JUL 1010.0 81 1360.0 109 660.0 53 1246. 1394 674 64 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 106.0 79 130.0 97 82.0 61 134. 141 45 88 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 395.0 80 500.0 101 290.0 59 495. 525 237 77 WEISER RIVER WEISER NR, ID (1) APR-JUL 295.0 75 435.0 111 154.0 39 391. 479 283 54 BURNT RIVER HEREFORD NR, OR MAR-JUL 37.0 73 45.0 88 28.0 55 51. 57 40 78 LOWER SNAKE AND CENTRAL OREGON BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 56.0 80 71.0 101 42.0 60 70. 80 IMNAHA RIVER IMNAHA, OR MAR-JUL 255.0 85 310.0 103 198.0 66 301. 337 143 95 SALMON RIVER SALMON, ID (1) APR-JUL 855.0 100 1150.0 134 570.0 67 857. 806 511 94 WHITEBIRD, ID (1) JAN-JUL 6680.0 98 7810.0 115 5550.0 82 6805. 7310 2424 94 APR-JUL 5860.0 100 6980.0 119 4730.0 81 5851. 6560 2424 94 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 255.0 102 295.0 118 220.0 88 249. 347 224 105 APR-JUL 205.0 111 245.0 133 166.0 90 184. 301 224 105 TROY, OR (1) MAR-JUL 1610.0 102 2010.0 127 1210.0 77 1578. 1971 1342 107 APR-JUL 1340.0 105 1740.0 137 935.0 73 1274. 1761 1342 107 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 4920.0 106 6060.0 130 3780.0 81 4645. 5729 2749 107 SPALDING, ID (1) JAN-JUL 9780.0 101 11400.0 118 8180.0 84 9683. 10500 4925 99 APR-JUL 7810.0 105 9410.0 127 6210.0 84 7435. 9382 4925 99 APR-SEP 8230.0 105 9830.0 125 6630.0 84 7849. 9851 4925 99 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3390.0 96 3890.0 110 2890.0 81 3547. 3823 1848 92 APR-JUL 2610.0 99 3110.0 118 2110.0 80 2644. 3434 1848 92 APR-SEP 2770.0 99 3270.0 117 2270.0 81 2803. 3659 1848 92 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 78.0 147 88.0 166 67.0 126 53. 92 103 133 UMATILLA RIVER GIBBON NR, OR APR-JUL 102.0 140 120.0 164 84.0 115 73. 127 141 114 PENDLETON, OR APR-JUL 245.0 164 285.0 191 210.0 141 149. 285 368 124 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 156.0 98 182.0 114 131.0 82 160. 0 APR-JUL 120.0 98 146.0 119 95.0 77 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 645.0 108 790.0 132 500.0 84 597. 883 547 81 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1090.0 95 1390.0 121 790.0 69 1153. 1362 784 76 APR-SEP 890.0 103 1190.0 138 590.0 68 865. 1152 784 76 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 495.0 94 525.0 99 470.0 89 528. 504 589 104 May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 122.0 66 154.0 84 89.0 48 184. 143 107 47 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 19.0 53 31.0 86 7.1 20 36. 33 WESTSIDE AND SOUTHERN OREGON BASINS May-09 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 5170.0 81 6300.0 99 4040.0 63 6365. 6790 4530 82 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3150.0 98 3960.0 123 2340.0 73 3217. 3468 2901 92 APR-JUL 1630.0 97 2440.0 144 830.0 49 1689. 2328 2901 92 APR-SEP 1860.0 97 2660.0 138 1050.0 55 1922. 2615 2901 92 CASTLE ROCK, WA APR-SEP 2540.0 96 3650.0 138 1430.0 54 2639. 3330 4287 87 JAN-JUL 4590.0 97 5700.0 121 3470.0 74 4709. 4998 4287 87 LEWIS RIVER ARIEL, WA JAN-JUL 2120.0 90 2280.0 97 1950.0 83 2351. 2397 2094 77 MCKENZIE RIVER VIDA NR, OR APR-SEP 1100.0 92 1260.0 105 950.0 79 1201. 1674 2017 94 S. SANTIAM RIVER WATERLOO, OR APR-SEP 610.0 104 785.0 134 435.0 74 587. 895 1622 86 N. SANTIAM RIVER MEHAMA, OR APR-SEP 885.0 106 1090.0 131 680.0 82 834. 1413 1824 93 WILLAMETTE RIVER SALEM, OR APR-SEP 4730.0 98 5750.0 120 3700.0 77 4804. 6084 10920 76 CLACKAMAS RIVER ESTACADA, OR APR-SEP 820.0 110 930.0 124 710.0 95 748. 1174 1337 86 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 127.0 84 148.0 98 106.0 70 151. 164 150 93 JAN-JUL 155.0 86 177.0 98 134.0 74 181. 180 150 93 ROGUE RIVER RAYGOLD, OR APR-SEP 755.0 85 850.0 96 660.0 74 889. 1076 1244 77 JAN-JUL 1310.0 83 1400.0 88 1210.0 76 1584. 1697 1244 77 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 67.0 75 89.0 100 44.0 49 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 87.0 67 133.0 103 41.0 32 129. 79 56 52 APR-SEP 71.0 72 117.0 118 25.0 25 99. 82 56 52 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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