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Water Supply Forecasts Northwest River Forecast Center Thursday April 02, 2009 at 16:31 GMT Observed precipitation through the 30th Future precip assumed to be normal Snow included in this run Observed runoff through February note: current runoff based on OBSERVED + ESP to the end of MARCH UPPER COLUMBIA BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 8660.0 90 9990.0 104 7340.0 76 9619. 9199 1905 93 FEB-JUL 8430.0 90 9750.0 104 7100.0 76 9372. 8909 1905 93 APR-SEP 11300.0 90 12600.0 101 9940.0 80 12500. 11570 1905 93 REVELSTOKE, BC JAN-JUL 12500.0 90 13800.0 99 11500.0 83 13880. 13420 2896 98 ARROW LAKES INFLOW JAN-JUL 18500.0 88 20600.0 98 16400.0 78 20960. 19230 4581 87 FEB-JUL 17900.0 88 19900.0 98 15800.0 78 20230. 18670 4581 87 APR-SEP 22400.0 89 24500.0 98 20300.0 81 25110. 22910 4581 87 BIRCHBANK, BC (1) JAN-JUL 33100.0 85 38300.0 98 27800.0 71 38930. 36130 8201 88 APR-SEP 37300.0 86 42600.0 98 32100.0 74 43500. 40800 8201 88 GRAND COULEE, WA (1) JAN-JUL 54400.0 86 63000.0 100 45900.0 73 62900. 59650 14180 82 APR-SEP 56600.0 88 65100.0 102 48000.0 75 63990. 62860 14180 82 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 59300.0 86 68800.0 100 49900.0 72 68910. 64110 15580 83 APR-SEP 61100.0 88 70500.0 101 51600.0 74 69540. 67150 15580 83 THE DALLES NR, OR (1) JAN-JUL 88500.0 82 102000.0 95 74900.0 70 107300. 99210 31480 80 APR-AUG 78700.0 85 92300.0 99 65100.0 70 93090. 93200 31480 80 APR-SEP 83300.0 84 96800.0 98 69700.0 71 98650. 97910 31480 80 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5150.0 82 6450.0 102 3850.0 61 6306. 5516 1165 75 APR-AUG 5200.0 83 6500.0 104 3900.0 62 6248. 5539 1165 75 APR-SEP 5520.0 83 6820.0 103 4220.0 64 6638. 5887 1165 75 LEONIA, ID (1) APR-JUL 5850.0 83 7430.0 106 4270.0 61 7041. 6568 1449 67 APR-SEP 6750.0 83 8330.0 103 5170.0 64 8125. 7516 1449 67 BONNERS FERRY, ID APR-JUL 6330.0 83 7870.0 103 4770.0 63 7619. 7099 1535 66 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 12800.0 80 15100.0 94 10400.0 65 16010. 14250 2907 74 APR-SEP 13400.0 81 16100.0 98 10700.0 65 16450. 15060 2907 74 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1630.0 91 2000.0 111 1250.0 69 1800. 1691 387 102 FEB-JUL 1570.0 90 1950.0 112 1200.0 69 1746. 1638 387 102 APR-SEP 2010.0 90 2390.0 107 1640.0 74 2227. 2111 387 102 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 820.0 116 1150.0 163 490.0 70 704. 852 393 114 MISSOULA ABV, MT APR-SEP 1740.0 109 2200.0 138 1280.0 80 1595. 1798 677 116 MISSOULA BLO, MT APR-SEP 3120.0 105 3810.0 129 2420.0 82 2962. 3420 1098 113 ST. REGIS, MT (1) APR-SEP 4010.0 103 5080.0 130 2940.0 75 3907. 4509 1467 111 PLAINS NR, MT (1) APR-SEP 10700.0 97 13000.0 118 8430.0 76 11060. 12090 2831 91 WHITEHORSE RAPIDS, ID (1) APR-SEP 12100.0 97 14700.0 118 9420.0 76 12460. 13630 3002 80 BLACKFOOT RIVER BONNER NR, MT APR-SEP 935.0 105 1220.0 137 645.0 72 892. 946 285 119 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1370.0 100 1660.0 122 1090.0 80 1364. 1597 456 117 Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1550.0 86 1910.0 106 1200.0 67 1801. 1865 232 64 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1610.0 93 1900.0 109 1320.0 76 1740. 2103 225 65 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2190.0 98 2640.0 119 1750.0 79 2224. 2506 414 90 APR-SEP 2140.0 101 2580.0 121 1690.0 80 2124. 2530 414 90 UPPER/MIDDLE COLUMBIA BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5460.0 94 6730.0 116 4190.0 72 5825. 6676 870 71 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6370.0 95 7750.0 115 4990.0 74 6713. 7562 1439 93 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 705.0 87 925.0 114 485.0 60 814. 849 212 59 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 13100.0 94 16000.0 115 10200.0 73 13910. 15810 3887 85 APR-JUL 12000.0 94 14900.0 117 9080.0 71 12740. 14580 3887 85 BOX CANYON BLO, WA (1) APR-SEP 13300.0 94 16300.0 116 10400.0 74 14090. 16110 4016 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 795.0 102 990.0 127 600.0 77 778. 1302 351 60 APR-JUL 755.0 102 950.0 129 560.0 76 739. 1258 351 60 COEUR D'ALENE LAKE IN, ID APR-JUL 2480.0 97 3110.0 122 1840.0 72 2552. 3826 1618 83 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2690.0 98 2780.0 101 2610.0 95 2744. 4128 1661 83 ST JOE RIVER CALDER, ID APR-SEP 1140.0 95 1370.0 114 905.0 75 1205. 1656 488 95 APR-JUL 1070.0 94 1300.0 114 840.0 74 1136. 1571 488 95 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1070.0 61 1630.0 92 510.0 29 1766. 1542 354 73 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 855.0 63 1220.0 90 490.0 36 1350. 1189 239 88 APR-SEP 920.0 63 1280.0 88 555.0 38 1450. 1259 239 88 METHOW RIVER PATEROS NR, WA (1) APR-SEP 640.0 65 885.0 90 395.0 40 985. 926 189 106 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 835.0 70 1010.0 85 660.0 56 1185. 1157 346 105 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1260.0 77 1790.0 109 730.0 45 1635. 1521 676 107 YAKIMA AND MAINSTEM SNAKE BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 106.0 80 132.0 99 80.0 60 133. 174 109 91 CLE ELUM, WA APR-SEP 705.0 78 805.0 89 605.0 67 903. 1013 675 106 PARKER NR, WA APR-SEP 1640.0 86 1860.0 97 1420.0 74 1918. 2325 1426 95 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 95.0 79 115.0 96 76.0 63 120. 150 95 94 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 360.0 80 410.0 92 305.0 68 448. 479 248 104 NACHES RIVER NACHES NR, WA APR-SEP 695.0 83 790.0 94 600.0 72 837. 991 481 102 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 117.0 87 135.0 101 100.0 75 134. 155 67 88 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 205.0 85 235.0 97 173.0 71 242. 247 129 89 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 37.0 80 54.0 117 20.0 43 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 730.0 90 870.0 107 590.0 72 815. 894 175 84 APR-SEP 810.0 90 950.0 105 670.0 74 904. 970 175 84 PALISADES RES INFLOW, ID (1) APR-JUL 3010.0 90 3550.0 107 2470.0 74 3331. 3352 1008 92 APR-SEP 3510.0 91 4050.0 105 2960.0 76 3875. 3850 1008 92 HEISE NR, ID APR-JUL 3220.0 90 3820.0 107 2610.0 73 3561. 3644 1222 97 APR-SEP 3760.0 90 4370.0 105 3150.0 76 4159. 4282 1222 97 SHELLEY NR, ID (1) APR-JUL 4130.0 93 4870.0 110 3400.0 77 4428. 4541 1847 99 APR-SEP 4970.0 93 5700.0 107 4230.0 79 5324. 5320 1847 99 BLACKFOOT NR, ID (1) APR-JUL 4160.0 90 4920.0 107 3400.0 74 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 2600.0 80 3660.0 113 1530.0 47 3242. 2731 2140 82 MILNER, ID APR-JUL 655.0 53 1510.0 123 225.0 18 1228. 160 222 14 KING HILL, ID (1) APR-JUL 2120.0 70 3070.0 101 1160.0 38 3045. 1765 2442 56 MURPHY NR, ID (1) APR-JUL 2260.0 73 3260.0 105 1270.0 41 3092. 1549 2714 60 WEISER, ID (1) JAN-JUL 5850.0 60 7600.0 78 4100.0 42 9793. 5966 3804 55 APR-JUL 3930.0 68 5680.0 99 2180.0 38 5765. 3926 3804 55 APR-SEP 5340.0 74 7090.0 99 3600.0 50 7192. 5218 3804 55 BROWNLEE RES INFLOW APR-JUL 4280.0 68 6440.0 102 2120.0 34 6313. 4367 4315 58 APR-SEP 5690.0 73 7850.0 101 3530.0 45 7801. 5699 4315 58 HELLS CANYON, ID (1) APR-JUL 4340.0 67 6280.0 97 2390.0 37 6493. 4738 4392 58 APR-SEP 5760.0 72 7700.0 97 3820.0 48 7977. 6060 4392 58 LOWER GRANITE RES IN, WA (1) JAN-JUL 25200.0 84 30100.0 100 20300.0 68 30020. 27520 10270 75 FEB-SEP 25500.0 84 30400.0 100 20500.0 68 30370. 28890 10270 75 APR-JUL 19200.0 89 24100.0 112 14300.0 66 21550. 22830 10270 75 APR-SEP 21400.0 89 26300.0 109 16500.0 68 24140. 25390 10270 75 UPPER SNAKE BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 355.0 90 425.0 108 285.0 72 394. 389 88 96 SALT RIVER ETNA NR, WY APR-JUL 295.0 86 395.0 115 195.0 57 342. 311 181 96 HENRYS FORK ASHTON NR, ID APR-JUL 490.0 86 605.0 106 370.0 65 571. 518 459 90 ST. ANTHONY, ID APR-JUL 570.0 78 785.0 107 360.0 49 734. 703 551 92 REXBURG NR, ID APR-JUL 1260.0 81 1600.0 103 920.0 59 1559. 905 686 70 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 325.0 84 390.0 101 260.0 67 386. 308 95 55 TETON RIVER ST. ANTHONY NR, ID APR-JUL 325.0 81 445.0 110 210.0 52 403. 445 167 96 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 121.0 85 179.0 126 64.0 45 142. 80 54 73 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 77.0 90 108.0 126 46.0 53 86. 41 13 55 PORTNEUF RIVER TOPAZ, ID APR-SEP 71.0 75 93.0 98 50.0 53 95. 61 43 69 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 21.0 72 35.0 121 7.3 25 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 200.0 78 285.0 111 114.0 45 256. 185 60 87 MAGIC RESERVOIR INFLOW, ID APR-JUL 195.0 67 310.0 107 78.0 27 291. 172 29 36 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 67.0 77 97.0 111 37.0 43 87. 50 21 71 MIDDLE SNAKE BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 191.0 92 290.0 139 92.0 44 208. 155 46 62 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 405.0 66 615.0 100 194.0 32 613. 452 227 53 OWYHEE RES OUTFLOW APR-JUL 14.7 7 110.0 51 1.5 217. 53 16 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 520.0 82 635.0 100 400.0 63 636. 655 174 81 BOISE NR, ID (1) APR-JUL 1100.0 78 1400.0 99 810.0 57 1414. 1290 379 69 PARMA NR, ID APR-JUL 320.0 54 585.0 99 128.0 22 593. 319 298 50 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 410.0 76 515.0 95 305.0 56 542. 442 115 76 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 66.0 60 101.0 92 32.0 29 110. 85 36 46 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 48.0 59 65.0 80 32.0 40 81. 80 28 57 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1220.0 75 1590.0 98 850.0 53 1617. 1701 482 74 EMMETT NR, ID APR-JUL 925.0 74 1320.0 106 525.0 42 1246. 1394 446 59 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 104.0 78 129.0 96 79.0 59 134. 141 27 81 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 380.0 77 495.0 100 265.0 54 495. 525 155 74 WEISER RIVER WEISER NR, ID (1) APR-JUL 265.0 68 440.0 113 92.0 24 391. 479 195 50 BURNT RIVER HEREFORD NR, OR MAR-JUL 34.0 67 48.0 94 19.4 38 51. 57 21 66 LOWER SNAKE AND CENTRAL OREGON BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 51.0 73 66.0 94 37.0 53 70. 80 IMNAHA RIVER IMNAHA, OR MAR-JUL 250.0 83 325.0 108 172.0 57 301. 337 80 84 SALMON RIVER SALMON, ID (1) APR-JUL 700.0 82 1010.0 118 390.0 46 857. 806 411 92 WHITEBIRD, ID (1) JAN-JUL 6170.0 91 7560.0 111 4780.0 70 6805. 7310 1636 88 APR-JUL 5350.0 91 6740.0 115 3960.0 68 5851. 6560 1636 88 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 215.0 86 275.0 110 152.0 61 249. 347 109 79 APR-JUL 165.0 90 225.0 122 105.0 57 184. 301 109 79 TROY, OR (1) MAR-JUL 1470.0 93 1880.0 119 1060.0 67 1578. 1971 742 83 APR-JUL 1190.0 93 1600.0 126 785.0 62 1274. 1761 742 83 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 4760.0 102 6030.0 130 3490.0 75 4645. 5729 1733 105 SPALDING, ID (1) JAN-JUL 9690.0 100 11500.0 119 7910.0 82 9683. 10500 3117 94 APR-JUL 7690.0 103 9460.0 127 5910.0 79 7435. 9382 3117 94 APR-SEP 8100.0 103 9880.0 126 6320.0 81 7849. 9851 3117 94 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3380.0 95 4000.0 113 2760.0 78 3547. 3823 1218 90 APR-JUL 2600.0 98 3220.0 122 1980.0 75 2644. 3434 1218 90 APR-SEP 2760.0 98 3380.0 121 2140.0 76 2803. 3659 1218 90 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 54.0 102 66.0 125 42.0 79 53. 92 63 102 UMATILLA RIVER GIBBON NR, OR APR-JUL 79.0 108 105.0 144 53.0 73 73. 127 86 93 PENDLETON, OR APR-JUL 163.0 109 230.0 154 96.0 64 149. 285 206 91 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 132.0 83 176.0 110 87.0 54 160. 0 APR-JUL 102.0 83 146.0 119 57.0 46 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 495.0 83 705.0 118 285.0 48 597. 883 262 58 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 925.0 80 1270.0 110 580.0 50 1153. 1362 388 55 APR-SEP 745.0 86 1090.0 126 395.0 46 865. 1152 388 55 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 485.0 92 520.0 98 450.0 85 528. 504 523 107 Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 142.0 77 200.0 109 84.0 46 184. 143 53 33 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 27.0 75 42.0 117 12.3 34 36. 33 WESTSIDE AND SOUTHERN OREGON BASINS Apr-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 5040.0 79 6290.0 99 3790.0 60 6365. 6790 3803 81 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3060.0 95 3930.0 122 2190.0 68 3217. 3468 2436 90 APR-JUL 1550.0 92 2420.0 143 675.0 40 1689. 2328 2436 90 APR-SEP 1760.0 92 2630.0 137 895.0 47 1922. 2615 2436 90 CASTLE ROCK, WA APR-SEP 2450.0 93 3660.0 139 1250.0 47 2639. 3330 3607 85 JAN-JUL 4500.0 96 5700.0 121 3300.0 70 4709. 4998 3607 85 LEWIS RIVER ARIEL, WA JAN-JUL 2130.0 91 2500.0 106 1760.0 75 2351. 2397 1706 72 MCKENZIE RIVER VIDA NR, OR APR-SEP 1110.0 92 1370.0 114 855.0 71 1201. 1674 1651 90 S. SANTIAM RIVER WATERLOO, OR APR-SEP 620.0 106 870.0 148 370.0 63 587. 895 1352 82 N. SANTIAM RIVER MEHAMA, OR APR-SEP 835.0 100 1070.0 128 600.0 72 834. 1413 1499 89 WILLAMETTE RIVER SALEM, OR APR-SEP 4760.0 99 6310.0 131 3220.0 67 4804. 6084 9191 73 CLACKAMAS RIVER ESTACADA, OR APR-SEP 775.0 104 935.0 125 615.0 82 748. 1174 1058 80 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 143.0 95 180.0 119 106.0 70 151. 164 107 78 JAN-JUL 152.0 84 189.0 104 115.0 64 181. 180 107 78 ROGUE RIVER RAYGOLD, OR APR-SEP 760.0 85 890.0 100 630.0 71 889. 1076 1033 76 JAN-JUL 1300.0 82 1430.0 90 1170.0 74 1584. 1697 1033 76 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 68.0 76 104.0 117 32.0 36 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 96.0 74 160.0 124 32.0 25 129. 79 30 50 APR-SEP 79.0 80 143.0 144 15.5 16 99. 82 30 50 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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