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Water Supply Forecasts Northwest River Forecast Center Thursday April 30, 2009 at 13:47 GMT Observed precipitation through the 27th Future precip assumed to be normal Snow included in this run Observed runoff through March note: current month runoff based on OBSERVED + ESP to the end of APR UPPER COLUMBIA BASINS May-09 EarlyBird ________________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 7590.0 79 9619. 9199 2241 88 FEB-JUL 8640.0 92 9940.0 106 7350.0 78 9372. 8909 2241 88 APR-SEP 11600.0 93 12900.0 103 10300.0 82 12500. 11570 2241 88 REVELSTOKE, BC JAN-JUL 12800.0 92 13900.0 100 11700.0 84 13880. 13420 3435 92 ARROW LAKES INFLOW JAN-JUL 19100.0 91 21100.0 101 17100.0 82 20960. 19230 5546 82 FEB-JUL 18500.0 91 20500.0 101 16500.0 82 20230. 18670 5546 82 APR-SEP 23200.0 92 25200.0 100 21200.0 84 25110. 22910 5546 82 BIRCHBANK, BC (1) JAN-JUL 34500.0 89 38900.0 100 30000.0 77 38930. 36130 10450 83 APR-SEP 39000.0 90 43500.0 100 34600.0 80 43500. 40800 10450 83 GRAND COULEE, WA (1) JAN-JUL 55600.0 88 62400.0 99 48900.0 78 62900. 59650 20230 82 APR-SEP 58000.0 91 64700.0 101 51200.0 80 63990. 62860 20230 82 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 60600.0 88 68400.0 99 52800.0 77 68910. 64110 21990 82 APR-SEP 62600.0 90 70400.0 101 54800.0 79 69540. 67150 21990 82 THE DALLES NR, OR (1) JAN-JUL 91100.0 85 102000.0 95 80200.0 75 107300. 99210 44490 83 APR-AUG 81400.0 87 92300.0 99 70500.0 76 93090. 93200 44490 83 APR-SEP 86300.0 87 97200.0 99 75400.0 76 98650. 97910 44490 83 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5400.0 86 6600.0 105 4200.0 67 6306. 5516 1481 71 APR-AUG 5470.0 88 6670.0 107 4270.0 68 6248. 5539 1481 71 APR-SEP 5800.0 87 7000.0 105 4600.0 69 6638. 5887 1481 71 LEONIA, ID (1) APR-JUL 6130.0 87 7610.0 108 4650.0 66 7041. 6568 2069 68 APR-SEP 7070.0 87 8550.0 105 5590.0 69 8125. 7516 2069 68 BONNERS FERRY, ID APR-JUL 6620.0 87 8080.0 106 5170.0 68 7619. 7099 2242 67 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 13400.0 84 15600.0 97 11300.0 71 16010. 14250 3991 72 APR-SEP 14100.0 86 16600.0 101 11700.0 71 16450. 15060 3991 72 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1660.0 92 2020.0 112 1300.0 72 1800. 1691 456 93 FEB-JUL 1610.0 92 1970.0 113 1250.0 72 1746. 1638 456 93 APR-SEP 2060.0 93 2420.0 109 1700.0 76 2227. 2111 456 93 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 730.0 104 950.0 135 505.0 72 704. 852 534 122 MISSOULA ABV, MT APR-SEP 1670.0 105 2050.0 129 1280.0 80 1595. 1798 1018 126 MISSOULA BLO, MT APR-SEP 3020.0 102 3620.0 122 2410.0 81 2962. 3420 1595 118 ST. REGIS, MT (1) APR-SEP 3890.0 100 4790.0 123 2990.0 77 3907. 4509 2112 114 PLAINS NR, MT (1) APR-SEP 10300.0 93 12200.0 110 8440.0 76 11060. 12090 4306 94 WHITEHORSE RAPIDS, ID (1) APR-SEP 11700.0 94 14000.0 112 9390.0 75 12460. 13630 4700 86 BLACKFOOT RIVER BONNER NR, MT APR-SEP 935.0 105 1180.0 132 685.0 77 892. 946 484 132 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1340.0 98 1600.0 117 1080.0 79 1364. 1597 626 115 May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1480.0 82 1800.0 100 1160.0 64 1801. 1865 394 70 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1590.0 91 1850.0 106 1330.0 76 1740. 2103 415 76 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2070.0 93 2500.0 112 1640.0 74 2224. 2506 700 93 APR-SEP 2010.0 95 2440.0 115 1580.0 74 2124. 2530 700 93 UPPER/MIDDLE COLUMBIA BASINS May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5230.0 90 6270.0 108 4190.0 72 5825. 6676 1531 79 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6070.0 90 7360.0 110 4780.0 71 6713. 7562 2277 94 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 715.0 88 915.0 112 515.0 63 814. 849 368 66 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 12700.0 91 15200.0 109 10200.0 73 13910. 15810 6066 90 APR-JUL 11600.0 91 14100.0 111 9100.0 71 12740. 14580 6066 90 BOX CANYON BLO, WA (1) APR-SEP 13000.0 92 15500.0 110 10400.0 74 14090. 16110 6233 89 KETTLE RIVER LAURIER NR, WA APR-SEP 1670.0 85 2020.0 102 1320.0 67 1972. 1517 328 54 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 790.0 102 950.0 122 630.0 81 778. 1302 663 75 APR-JUL 750.0 101 915.0 124 590.0 80 739. 1258 663 75 COEUR D'ALENE LAKE IN, ID APR-JUL 2480.0 97 3010.0 118 1950.0 76 2552. 3826 2629 93 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2720.0 99 2790.0 102 2640.0 96 2744. 4128 2708 94 ST JOE RIVER CALDER, ID APR-SEP 1150.0 95 1340.0 111 965.0 80 1205. 1656 759 94 APR-JUL 1080.0 95 1270.0 112 895.0 79 1136. 1571 759 94 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1040.0 59 1560.0 88 525.0 30 1766. 1542 427 64 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 800.0 59 1140.0 84 465.0 34 1350. 1189 304 77 APR-SEP 860.0 59 1200.0 83 525.0 36 1450. 1259 304 77 METHOW RIVER PATEROS NR, WA (1) APR-SEP 635.0 64 865.0 88 405.0 41 985. 926 255 91 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 850.0 72 995.0 84 710.0 60 1185. 1157 446 96 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1290.0 79 1800.0 110 775.0 47 1635. 1521 835 97 YAKIMA AND MAINSTEM SNAKE BASINS May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 117.0 88 143.0 108 90.0 68 133. 174 132 88 CLE ELUM, WA APR-SEP 765.0 85 875.0 97 650.0 72 903. 1013 845 103 PARKER NR, WA APR-SEP 1730.0 90 1960.0 102 1510.0 79 1918. 2325 1862 97 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 104.0 87 122.0 102 86.0 72 120. 150 118 91 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 400.0 89 450.0 100 350.0 78 448. 479 308 98 NACHES RIVER NACHES NR, WA APR-SEP 715.0 85 830.0 99 600.0 72 837. 991 647 102 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 120.0 90 143.0 107 96.0 72 134. 155 81 84 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 220.0 91 255.0 105 187.0 77 242. 247 160 89 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 37.0 80 53.0 115 21.0 46 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 860.0 106 985.0 121 730.0 90 815. 894 228 85 APR-SEP 955.0 106 1080.0 119 825.0 91 904. 970 228 85 PALISADES RES INFLOW, ID (1) APR-JUL 3490.0 105 3950.0 119 3030.0 91 3331. 3352 1371 95 APR-SEP 4060.0 105 4520.0 117 3600.0 93 3875. 3850 1371 95 HEISE NR, ID APR-JUL 3730.0 105 4230.0 119 3230.0 91 3561. 3644 1655 100 APR-SEP 4360.0 105 4860.0 117 3860.0 93 4159. 4282 1655 100 SHELLEY NR, ID (1) APR-JUL 4750.0 107 5390.0 122 4100.0 93 4428. 4541 2417 102 APR-SEP 5710.0 107 6360.0 119 5070.0 95 5324. 5320 2417 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 2541 80 MILNER, ID APR-JUL 1170.0 95 1920.0 156 410.0 33 1228. 160 736 36 KING HILL, ID (1) APR-JUL 2630.0 86 3510.0 115 1750.0 57 3045. 1765 3337 64 MURPHY NR, ID (1) APR-JUL 2810.0 91 3750.0 121 1880.0 61 3092. 1549 3592 66 WEISER, ID (1) JAN-JUL 6550.0 67 8120.0 83 4980.0 51 9793. 5966 5008 57 APR-JUL 4630.0 80 6200.0 108 3060.0 53 5765. 3926 5008 57 APR-SEP 6060.0 84 7630.0 106 4490.0 62 7192. 5218 5008 57 BROWNLEE RES INFLOW APR-JUL 5040.0 80 6940.0 110 3140.0 50 6313. 4367 5636 60 APR-SEP 6350.0 81 8250.0 106 4450.0 57 7801. 5699 5636 60 HELLS CANYON, ID (1) APR-JUL 5110.0 79 6850.0 105 3370.0 52 6493. 4738 5792 61 APR-SEP 6560.0 82 8300.0 104 4820.0 60 7977. 6060 5792 61 LOWER GRANITE RES IN, WA (1) JAN-JUL 26300.0 88 30500.0 102 22200.0 74 30020. 27520 15180 81 FEB-SEP 26700.0 88 30800.0 101 22500.0 74 30370. 28890 15180 81 APR-JUL 20300.0 94 24500.0 114 16200.0 75 21550. 22830 15180 81 APR-SEP 22600.0 94 26700.0 111 18400.0 76 24140. 25390 15180 81 UPPER SNAKE BASINS May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 430.0 109 485.0 123 380.0 96 394. 389 129 98 SALT RIVER ETNA NR, WY APR-JUL 360.0 105 445.0 130 280.0 82 342. 311 246 98 HENRYS FORK ASHTON NR, ID APR-JUL 510.0 89 625.0 109 390.0 68 571. 518 554 88 ST. ANTHONY, ID APR-JUL 640.0 87 805.0 110 485.0 66 734. 703 678 92 REXBURG NR, ID APR-JUL 1370.0 88 1630.0 105 1120.0 72 1559. 905 828 69 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 350.0 91 415.0 108 285.0 74 386. 308 118 54 TETON RIVER ST. ANTHONY NR, ID APR-JUL 360.0 89 440.0 109 280.0 69 403. 445 211 97 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 118.0 83 152.0 107 85.0 60 142. 80 60 69 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 93.0 108 122.0 142 64.0 74 86. 41 33 69 PORTNEUF RIVER TOPAZ, ID APR-SEP 83.0 87 95.0 100 71.0 75 95. 61 55 69 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 24.0 83 35.0 121 13.8 48 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 194.0 76 275.0 107 115.0 45 256. 185 86 86 MAGIC RESERVOIR INFLOW, ID APR-JUL 195.0 67 295.0 101 95.0 33 291. 172 51 31 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 65.0 75 90.0 103 40.0 46 87. 50 35 65 MIDDLE SNAKE BASINS May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 215.0 103 295.0 142 138.0 66 208. 155 89 74 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 395.0 64 545.0 89 245.0 40 613. 452 342 57 OWYHEE RES OUTFLOW APR-JUL 13.5 6 40.0 18 4.0 2 217. 53 27 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 530.0 83 640.0 101 420.0 66 636. 655 314 92 BOISE NR, ID (1) APR-JUL 1130.0 80 1370.0 97 885.0 63 1414. 1290 679 77 PARMA NR, ID APR-JUL 345.0 58 560.0 94 138.0 23 593. 319 333 43 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 420.0 77 525.0 97 320.0 59 542. 442 207 78 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 73.0 66 83.0 75 63.0 57 110. 85 55 47 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 60.0 74 67.0 83 52.0 64 81. 80 41 57 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1270.0 79 1600.0 99 950.0 59 1617. 1701 754 77 EMMETT NR, ID APR-JUL 980.0 79 1340.0 108 635.0 51 1246. 1394 684 65 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 106.0 79 130.0 97 82.0 61 134. 141 32 63 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 385.0 78 490.0 99 280.0 57 495. 525 237 77 WEISER RIVER WEISER NR, ID (1) APR-JUL 300.0 77 440.0 113 159.0 41 391. 479 283 54 BURNT RIVER HEREFORD NR, OR MAR-JUL 35.0 69 43.0 84 26.0 51 51. 57 40 78 LOWER SNAKE AND CENTRAL OREGON BASINS May-09 EarlyBird ________________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 250.0 83 305.0 101 193.0 64 301. 337 144 95 SALMON RIVER SALMON, ID (1) APR-JUL 770.0 90 1060.0 124 480.0 56 857. 806 511 94 WHITEBIRD, ID (1) JAN-JUL 6340.0 93 7470.0 110 5220.0 77 6805. 7310 2435 95 APR-JUL 5520.0 94 6650.0 114 4400.0 75 5851. 6560 2435 95 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 220.0 88 255.0 102 179.0 72 249. 347 224 105 APR-JUL 170.0 92 210.0 114 131.0 71 184. 301 224 105 TROY, OR (1) MAR-JUL 1460.0 93 1860.0 118 1060.0 67 1578. 1971 1340 107 APR-JUL 1180.0 93 1580.0 124 785.0 62 1274. 1761 1340 107 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 4810.0 104 5950.0 128 3680.0 79 4645. 5729 2748 107 SPALDING, ID (1) JAN-JUL 9690.0 100 11300.0 117 8090.0 84 9683. 10500 4924 99 APR-JUL 7720.0 104 9320.0 125 6120.0 82 7435. 9382 4924 99 APR-SEP 8130.0 104 9730.0 124 6530.0 83 7849. 9851 4924 99 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3420.0 96 3920.0 111 2920.0 82 3547. 3823 1843 91 APR-JUL 2640.0 100 3140.0 119 2140.0 81 2644. 3434 1843 91 APR-SEP 2800.0 100 3300.0 118 2300.0 82 2803. 3659 1843 91 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 53.0 100 63.0 119 42.0 79 53. 92 104 134 UMATILLA RIVER GIBBON NR, OR APR-JUL 82.0 112 100.0 137 64.0 88 73. 127 142 115 PENDLETON, OR APR-JUL 167.0 112 205.0 138 129.0 87 149. 285 367 123 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 149.0 93 175.0 109 124.0 78 160. 0 APR-JUL 115.0 93 141.0 115 90.0 73 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 545.0 91 685.0 115 400.0 67 597. 883 544 81 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1060.0 92 1360.0 118 755.0 65 1153. 1362 780 76 APR-SEP 855.0 99 1150.0 133 555.0 64 865. 1152 780 76 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 490.0 93 520.0 98 465.0 88 528. 504 589 104 May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 136.0 74 168.0 91 103.0 56 184. 143 107 47 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 26.0 72 38.0 106 14.0 39 36. 33 WESTSIDE AND SOUTHERN OREGON BASINS May-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 5170.0 81 6300.0 99 4030.0 63 6365. 6790 4500 81 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3030.0 94 3840.0 119 2220.0 69 3217. 3468 2879 91 APR-JUL 1520.0 90 2330.0 138 715.0 42 1689. 2328 2879 91 APR-SEP 1730.0 90 2530.0 132 920.0 48 1922. 2615 2879 91 CASTLE ROCK, WA APR-SEP 2400.0 91 3510.0 133 1290.0 49 2639. 3330 4256 86 JAN-JUL 4450.0 94 5570.0 118 3340.0 71 4709. 4998 4256 86 LEWIS RIVER ARIEL, WA JAN-JUL 2080.0 88 2250.0 96 1920.0 82 2351. 2397 2066 75 MCKENZIE RIVER VIDA NR, OR APR-SEP 1140.0 95 1290.0 107 985.0 82 1201. 1674 2012 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 845.0 101 1050.0 126 640.0 77 834. 1413 1820 93 WILLAMETTE RIVER SALEM, OR APR-SEP 4770.0 99 5790.0 121 3740.0 78 4804. 6084 10910 76 CLACKAMAS RIVER ESTACADA, OR APR-SEP 795.0 106 905.0 121 685.0 92 748. 1174 1326 86 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 142.0 94 163.0 108 121.0 80 151. 164 130 80 JAN-JUL 168.0 93 189.0 104 146.0 81 181. 180 130 80 ROGUE RIVER RAYGOLD, OR APR-SEP 750.0 84 840.0 94 655.0 74 889. 1076 1246 77 JAN-JUL 1300.0 82 1390.0 88 1210.0 76 1584. 1697 1246 77 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 67.0 75 90.0 101 45.0 51 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 96.0 74 142.0 110 51.0 40 129. 79 57 53 APR-SEP 80.0 81 126.0 127 34.0 34 99. 82 57 53 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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