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Water Supply Forecasts Northwest River Forecast Center Friday May 29, 2009 at 15:58 GMT Observed precipitation through the 25th Future precip_zero to end of month; 85% rest of way No snow included Observed runoff through April note: current month runoff based on OBSERVED + ESP to the end of MAY UPPER COLUMBIA BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 8450.0 88 9730.0 101 7170.0 75 9619. 9199 3191 74 FEB-JUL 8210.0 88 9490.0 101 6930.0 74 9372. 8909 3191 74 APR-SEP 11000.0 88 12200.0 98 9690.0 78 12500. 11570 3191 74 REVELSTOKE, BC JAN-JUL 12100.0 87 13200.0 95 11100.0 80 13880. 13420 5021 77 ARROW LAKES INFLOW JAN-JUL 18100.0 86 20000.0 95 16200.0 77 20960. 19230 8345 74 FEB-JUL 17500.0 87 19400.0 96 15600.0 77 20230. 18670 8345 74 APR-SEP 21900.0 87 23800.0 95 20000.0 80 25110. 22910 8345 74 BIRCHBANK, BC (1) JAN-JUL 32800.0 84 37000.0 95 28500.0 73 38930. 36130 16660 75 APR-SEP 36900.0 85 41200.0 95 32700.0 75 43500. 40800 16660 75 GRAND COULEE, WA (1) JAN-JUL 54100.0 86 60300.0 96 47900.0 76 62900. 59650 32450 79 APR-SEP 56200.0 88 62400.0 98 50000.0 78 63990. 62860 32450 79 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 59200.0 86 66500.0 97 51900.0 75 68910. 64110 35330 79 APR-SEP 60900.0 88 68200.0 98 53600.0 77 69540. 67150 35330 79 THE DALLES NR, OR (1) JAN-JUL 91100.0 85 101000.0 94 81600.0 76 107300. 99210 67460 84 APR-AUG 81400.0 87 91000.0 98 71900.0 77 93090. 93200 67460 84 APR-SEP 86300.0 87 95800.0 97 76700.0 78 98650. 97910 67460 84 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5020.0 80 6140.0 97 3890.0 62 6306. 5516 2471 66 APR-AUG 5050.0 81 6170.0 99 3920.0 63 6248. 5539 2471 66 APR-SEP 5360.0 81 6480.0 98 4230.0 64 6638. 5887 2471 66 LEONIA, ID (1) APR-JUL 5730.0 81 7120.0 101 4340.0 62 7041. 6568 3525 67 APR-SEP 6610.0 81 8000.0 98 5220.0 64 8125. 7516 3525 67 BONNERS FERRY, ID APR-JUL 6190.0 81 7550.0 99 4840.0 64 7619. 7099 3887 66 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 12800.0 80 14600.0 91 10800.0 67 16010. 14250 6912 69 APR-SEP 13400.0 81 15500.0 94 11200.0 68 16450. 15060 6912 69 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1610.0 89 1960.0 109 1250.0 69 1800. 1691 748 85 FEB-JUL 1560.0 89 1910.0 109 1200.0 69 1746. 1638 748 85 APR-SEP 1990.0 89 2350.0 106 1640.0 74 2227. 2111 748 85 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 815.0 116 1030.0 146 590.0 84 704. 852 818 128 MISSOULA ABV, MT APR-SEP 1820.0 114 2070.0 130 1570.0 98 1595. 1798 1670 129 MISSOULA BLO, MT APR-SEP 3260.0 110 3630.0 123 2880.0 97 2962. 3420 2745 122 ST. REGIS, MT (1) APR-SEP 4100.0 105 4840.0 124 3360.0 86 3907. 4509 3544 115 PLAINS NR, MT (1) APR-SEP 10300.0 93 12000.0 108 8690.0 79 11060. 12090 7537 93 WHITEHORSE RAPIDS, ID (1) APR-SEP 11700.0 94 13600.0 109 9790.0 79 12460. 13630 8321 88 BLACKFOOT RIVER BONNER NR, MT APR-SEP 1000.0 112 1090.0 122 915.0 103 892. 946 852 129 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1390.0 102 1570.0 115 1220.0 89 1364. 1597 1115 117 Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1420.0 79 1610.0 89 1240.0 69 1801. 1865 822 71 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1550.0 89 1750.0 101 1350.0 78 1740. 2103 909 82 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2050.0 92 2470.0 111 1640.0 74 2224. 2506 1424 95 APR-SEP 1990.0 94 2400.0 113 1570.0 74 2124. 2530 1424 95 UPPER/MIDDLE COLUMBIA BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5110.0 88 5840.0 100 4380.0 75 5825. 6676 3164 81 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 5940.0 88 7120.0 106 4770.0 71 6713. 7562 4142 89 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 695.0 85 885.0 109 505.0 62 814. 849 596 68 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 12800.0 92 14900.0 107 10700.0 77 13910. 15810 10280 92 APR-JUL 11700.0 92 13800.0 108 9620.0 76 12740. 14580 10280 92 BOX CANYON BLO, WA (1) APR-SEP 13000.0 92 15200.0 108 10900.0 77 14090. 16110 10410 90 KETTLE RIVER LAURIER NR, WA APR-SEP 1660.0 84 1920.0 97 1400.0 71 1972. 1517 909 67 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 835.0 107 930.0 120 740.0 95 778. 1302 1000 86 APR-JUL 795.0 108 890.0 120 700.0 95 739. 1258 1000 86 COEUR D'ALENE LAKE IN, ID APR-JUL 2640.0 103 2920.0 114 2360.0 92 2552. 3826 3777 99 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2980.0 109 3050.0 111 2910.0 106 2744. 4128 3851 99 ST JOE RIVER CALDER, ID APR-SEP 1140.0 95 1250.0 104 1030.0 85 1205. 1656 1248 98 APR-JUL 1070.0 94 1180.0 104 955.0 84 1136. 1571 1248 98 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1050.0 59 1520.0 86 575.0 33 1766. 1542 735 61 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 805.0 60 1120.0 83 490.0 36 1350. 1189 603 68 APR-SEP 865.0 60 1180.0 81 550.0 38 1450. 1259 603 68 METHOW RIVER PATEROS NR, WA (1) APR-SEP 670.0 68 880.0 89 460.0 47 985. 926 481 80 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 870.0 73 1080.0 91 665.0 56 1185. 1157 698 89 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1320.0 81 1830.0 112 815.0 50 1635. 1521 1246 94 YAKIMA AND MAINSTEM SNAKE BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 131.0 98 154.0 116 108.0 81 133. 174 189 97 CLE ELUM, WA APR-SEP 900.0 100 1030.0 114 770.0 85 903. 1013 1214 109 PARKER NR, WA APR-SEP 2080.0 108 2380.0 124 1780.0 93 1918. 2325 2635 104 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 119.0 99 137.0 114 101.0 84 120. 150 167 98 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 395.0 88 460.0 103 330.0 74 448. 479 445 98 NACHES RIVER NACHES NR, WA APR-SEP 880.0 105 1000.0 119 755.0 90 837. 991 1022 114 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 136.0 101 164.0 122 108.0 81 134. 155 129 94 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 250.0 103 280.0 116 220.0 91 242. 247 233 96 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 43.0 93 58.0 126 28.0 61 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 775.0 95 935.0 115 620.0 76 815. 894 536 100 APR-SEP 860.0 95 1020.0 113 705.0 78 904. 970 536 100 PALISADES RES INFLOW, ID (1) APR-JUL 3150.0 95 3580.0 107 2710.0 81 3331. 3352 2472 100 APR-SEP 3670.0 95 4100.0 106 3230.0 83 3875. 3850 2472 100 HEISE NR, ID APR-JUL 3430.0 96 3910.0 110 2940.0 83 3561. 3644 2867 103 APR-SEP 4010.0 96 4500.0 108 3520.0 85 4159. 4282 2867 103 SHELLEY NR, ID (1) APR-JUL 4210.0 95 4760.0 107 3660.0 83 4428. 4541 3912 104 APR-SEP 5060.0 95 5610.0 105 4510.0 85 5324. 5320 3912 104 BLACKFOOT NR, ID (1) APR-JUL 4240.0 92 4830.0 105 3650.0 79 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 2680.0 83 3490.0 108 1870.0 58 3242. 2731 3630 83 MILNER, ID APR-JUL 970.0 79 1620.0 132 505.0 41 1228. 160 1060 44 KING HILL, ID (1) APR-JUL 2400.0 79 3200.0 105 1600.0 53 3045. 1765 4106 67 MURPHY NR, ID (1) APR-JUL 2500.0 81 3380.0 109 1630.0 53 3092. 1549 4394 69 WEISER, ID (1) JAN-JUL 6340.0 65 7760.0 79 4920.0 50 9793. 5966 6484 62 APR-JUL 4420.0 77 5840.0 101 3000.0 52 5765. 3926 6484 62 APR-SEP 5850.0 81 7260.0 101 4430.0 62 7192. 5218 6484 62 BROWNLEE RES INFLOW APR-JUL 4820.0 76 6530.0 103 3100.0 49 6313. 4367 7263 64 APR-SEP 5990.0 77 7710.0 99 4270.0 55 7801. 5699 7263 64 HELLS CANYON, ID (1) APR-JUL 4890.0 75 6460.0 99 3310.0 51 6493. 4738 7464 65 APR-SEP 6340.0 79 7910.0 99 4760.0 60 7977. 6060 7464 65 LOWER GRANITE RES IN, WA (1) JAN-JUL 26800.0 89 30300.0 101 23300.0 78 30020. 27520 23430 90 FEB-SEP 27200.0 90 30700.0 101 23600.0 78 30370. 28890 23430 90 APR-JUL 20800.0 97 24300.0 113 17200.0 80 21550. 22830 23430 90 APR-SEP 23100.0 96 26600.0 110 19500.0 81 24140. 25390 23430 90 UPPER SNAKE BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 385.0 98 435.0 110 340.0 86 394. 389 258 107 SALT RIVER ETNA NR, WY APR-JUL 330.0 96 390.0 114 270.0 79 342. 311 374 101 HENRYS FORK ASHTON NR, ID APR-JUL 465.0 81 540.0 95 395.0 69 571. 518 725 87 ST. ANTHONY, ID APR-JUL 665.0 91 775.0 106 550.0 75 734. 703 946 93 REXBURG NR, ID APR-JUL 1200.0 77 1380.0 89 1020.0 65 1559. 905 1141 67 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 260.0 67 315.0 82 200.0 52 386. 308 215 61 TETON RIVER ST. ANTHONY NR, ID APR-JUL 340.0 84 415.0 103 265.0 66 403. 445 332 100 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 119.0 84 159.0 112 79.0 56 142. 80 99 83 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 57.0 66 84.0 98 31.0 36 86. 41 58 65 PORTNEUF RIVER TOPAZ, ID APR-SEP 53.0 56 65.0 68 41.0 43 95. 61 71 67 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 19.6 68 25.0 86 14.0 48 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 178.0 70 255.0 100 102.0 40 256. 185 147 81 MAGIC RESERVOIR INFLOW, ID APR-JUL 152.0 52 205.0 70 101.0 35 291. 172 141 55 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 44.0 51 61.0 70 27.0 31 87. 50 51 60 MIDDLE SNAKE BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 178.0 86 220.0 106 134.0 64 208. 155 158 78 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 355.0 58 420.0 69 290.0 47 613. 452 415 56 OWYHEE RES OUTFLOW APR-JUL 27.0 12 33.0 15 23.0 11 217. 53 39 11 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 540.0 85 640.0 101 440.0 69 636. 655 527 93 BOISE NR, ID (1) APR-JUL 1140.0 81 1380.0 98 910.0 64 1414. 1290 1116 80 PARMA NR, ID APR-JUL 355.0 60 570.0 96 149.0 25 593. 319 433 44 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 420.0 77 520.0 96 320.0 59 542. 442 375 80 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 49.0 45 54.0 49 44.0 40 110. 85 68 48 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 44.0 54 48.0 59 40.0 49 81. 80 58 62 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1520.0 94 1850.0 114 1200.0 74 1617. 1701 1368 87 EMMETT NR, ID APR-JUL 1200.0 96 1560.0 125 855.0 69 1246. 1394 1114 77 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 115.0 86 139.0 104 91.0 68 134. 141 90 89 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 465.0 94 565.0 114 365.0 74 495. 525 444 90 WEISER RIVER WEISER NR, ID (1) APR-JUL 270.0 69 395.0 101 147.0 38 391. 479 401 60 BURNT RIVER HEREFORD NR, OR MAR-JUL 44.0 86 48.0 94 41.0 80 51. 57 54 85 LOWER SNAKE AND CENTRAL OREGON BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 59.0 84 69.0 99 50.0 71 70. 80 IMNAHA RIVER IMNAHA, OR MAR-JUL 305.0 101 350.0 116 260.0 86 301. 337 251 101 SALMON RIVER SALMON, ID (1) APR-JUL 815.0 95 1100.0 128 530.0 62 857. 806 779 100 WHITEBIRD, ID (1) JAN-JUL 6520.0 96 7520.0 111 5530.0 81 6805. 7310 4871 108 APR-JUL 5700.0 97 6700.0 115 4710.0 80 5851. 6560 4871 108 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 300.0 120 320.0 129 285.0 114 249. 347 324 114 APR-JUL 250.0 136 270.0 147 230.0 125 184. 301 324 114 TROY, OR (1) MAR-JUL 1980.0 125 2380.0 151 1590.0 101 1578. 1971 2015 119 APR-JUL 1710.0 134 2100.0 165 1310.0 103 1274. 1761 2015 119 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 4880.0 105 5930.0 128 3830.0 82 4645. 5729 4856 112 SPALDING, ID (1) JAN-JUL 9690.0 100 11100.0 115 8230.0 85 9683. 10500 8193 105 APR-JUL 7720.0 104 9180.0 123 6260.0 84 7435. 9382 8193 105 APR-SEP 8130.0 104 9590.0 122 6670.0 85 7849. 9851 8193 105 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3250.0 92 3680.0 104 2820.0 80 3547. 3823 2909 96 APR-JUL 2470.0 93 2900.0 110 2030.0 77 2644. 3434 2909 96 APR-SEP 2620.0 93 3060.0 109 2190.0 78 2803. 3659 2909 96 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 89.0 168 97.0 183 81.0 153 53. 92 143 150 UMATILLA RIVER GIBBON NR, OR APR-JUL 126.0 173 136.0 186 117.0 160 73. 127 196 130 PENDLETON, OR APR-JUL 315.0 211 330.0 221 300.0 201 149. 285 491 140 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 168.0 105 186.0 116 150.0 94 160. 0 APR-JUL 130.0 106 148.0 120 112.0 91 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 765.0 128 850.0 142 680.0 114 597. 883 871 96 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1190.0 103 1480.0 128 905.0 78 1153. 1362 1183 88 APR-SEP 990.0 114 1270.0 147 705.0 82 865. 1152 1183 88 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 510.0 97 535.0 101 485.0 92 528. 504 688 104 Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 123.0 67 135.0 73 110.0 60 184. 143 140 54 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 19.0 53 23.0 64 15.3 43 36. 33 WESTSIDE AND SOUTHERN OREGON BASINS Jun-09 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 5420.0 85 6550.0 103 4280.0 67 6365. 6790 6042 86 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3290.0 102 4080.0 127 2500.0 78 3217. 3468 3604 97 APR-JUL 1770.0 105 2560.0 152 975.0 58 1689. 2328 3604 97 APR-SEP 2010.0 105 2800.0 146 1220.0 63 1922. 2615 3604 97 CASTLE ROCK, WA APR-SEP 2750.0 104 3840.0 146 1660.0 63 2639. 3330 5223 93 JAN-JUL 4780.0 102 5870.0 125 3690.0 78 4709. 4998 5223 93 LEWIS RIVER ARIEL, WA JAN-JUL 2200.0 94 2320.0 99 2090.0 89 2351. 2397 2567 84 MCKENZIE RIVER VIDA NR, OR APR-SEP 1370.0 114 1450.0 121 1290.0 107 1201. 1674 2434 99 S. SANTIAM RIVER WATERLOO, OR APR-SEP 675.0 115 785.0 134 565.0 96 587. 895 1888 92 N. SANTIAM RIVER MEHAMA, OR APR-SEP 990.0 119 1120.0 134 860.0 103 834. 1413 2225 102 WILLAMETTE RIVER SALEM, OR APR-SEP 5080.0 106 5670.0 118 4490.0 93 4804. 6084 12690 81 CLACKAMAS RIVER ESTACADA, OR APR-SEP 930.0 124 1020.0 136 845.0 113 748. 1174 1689 96 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 122.0 81 143.0 95 101.0 67 151. 164 155 80 JAN-JUL 151.0 83 172.0 95 130.0 72 181. 180 155 80 ROGUE RIVER RAYGOLD, OR APR-SEP 755.0 85 820.0 92 695.0 78 889. 1076 1501 81 JAN-JUL 1310.0 83 1370.0 86 1250.0 79 1584. 1697 1501 81 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 65.0 73 87.0 98 43.0 48 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 83.0 64 129.0 100 38.0 29 129. 79 78 55 APR-SEP 67.0 68 113.0 114 22.0 22 99. 82 78 55 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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