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Water Supply Forecasts Northwest River Forecast Center Friday March 18, 2005 at 16:56 GMT Observed precipitation through the 14th Future precip is 70% of normal for the rest of March Future precip is 80% of normal for the first half of April Future precip is 100% of normal for the rest of the season No snow included Runoff estimated in this run UPPER COLUMBIA BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 9100.0 95 10400.0 108 7770.0 81 9619. 9079 2421 119 FEB-SEP 12100.0 93 13500.0 104 10800.0 83 12960. 11800 2421 119 APR-SEP 11700.0 94 13100.0 105 10400.0 83 12500. 11360 2421 119 REVELSTOKE, BC JAN-JUL 13700.0 99 14900.0 107 12600.0 91 13880. 12860 3503 119 ARROW LAKES INFLOW JAN-JUL 20400.0 97 22500.0 107 18400.0 88 20960. 18580 5622 106 FEB-SEP 25500.0 96 27500.0 104 23400.0 88 26460. 22700 5622 106 APR-SEP 24300.0 97 26400.0 105 22300.0 89 25110. 21650 5622 106 BIRCHBANK, BC (1) JAN-JUL 35500.0 91 40800.0 105 30300.0 78 38930. 34250 11120 120 APR-SEP 38800.0 89 44000.0 101 33500.0 77 43500. 37220 11120 120 GRAND COULEE, WA (1) JAN-JUL 49400.0 79 58000.0 92 40900.0 65 62900. 54180 18420 106 APR-SEP 49300.0 77 57900.0 90 40800.0 64 63990. 52740 18420 106 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 53400.0 77 62900.0 91 44000.0 64 68910. 58540 20290 108 APR-SEP 52400.0 75 61800.0 89 43000.0 62 69540. 56310 20290 108 THE DALLES NR, OR (1) JAN-JUL 67700.0 63 81300.0 76 54100.0 50 107300. 87690 32920 84 APR-AUG 57900.0 62 71500.0 77 44400.0 48 93090. 73770 32920 84 APR-SEP 61500.0 62 75000.0 76 47900.0 49 98650. 77440 32920 84 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 4790.0 76 6090.0 97 3490.0 55 6306. 5187 1700 109 APR-AUG 4550.0 73 5850.0 94 3250.0 52 6248. 5084 1700 109 APR-SEP 4850.0 73 6150.0 93 3550.0 53 6638. 5340 1700 109 LEONIA, ID (1) APR-JUL 5060.0 72 6640.0 94 3480.0 49 7041. 5608 2405 111 APR-SEP 5840.0 72 7420.0 91 4260.0 52 8125. 6276 2405 111 BONNERS FERRY, ID APR-JUL 5490.0 72 7040.0 92 3940.0 52 7619. 5943 2569 110 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 13000.0 81 15500.0 97 10700.0 67 16010. 13420 4346 111 APR-SEP 13000.0 79 15800.0 96 10300.0 63 16450. 13430 4346 111 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1750.0 97 2120.0 118 1370.0 76 1800. 1696 460 122 FEB-SEP 2190.0 95 2570.0 111 1820.0 79 2305. 2147 460 122 APR-SEP 2110.0 95 2490.0 112 1740.0 78 2227. 2066 460 122 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 275.0 39 605.0 86 0.0 0 704. 617 245 71 MISSOULA ABV, MT APR-SEP 635.0 40 1090.0 68 175.0 11 1595. 1353 465 80 MISSOULA BLO, MT APR-SEP 1200.0 41 1890.0 64 500.0 17 2962. 2767 742 76 ST. REGIS, MT (1) APR-SEP 1630.0 42 2700.0 69 560.0 14 3907. 3591 1061 80 PLAINS NR, MT (1) APR-SEP 5710.0 52 7990.0 72 3430.0 31 11060. 8624 3101 99 WHITEHORSE RAPIDS, ID (1) APR-SEP 6210.0 50 8870.0 71 3560.0 29 12460. 9321 3593 96 BLACKFOOT RIVER BONNER NR, MT APR-SEP 360.0 40 645.0 72 72.0 8 892. 736 220 92 BITTERROOT RIVER AT MOUTH, MT APR-SEP 565.0 41 850.0 62 275.0 20 1364. 1317 288 74 Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1080.0 60 1430.0 79 725.0 40 1801. 1404 589 163 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 970.0 56 1260.0 72 680.0 39 1740. 1418 495 142 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 1460.0 66 1900.0 85 1010.0 45 2224. 1817 643 140 APR-SEP 1230.0 58 1670.0 79 790.0 37 2124. 1692 643 140 UPPER/MIDDLE COLUMBIA BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 3470.0 60 4740.0 81 2190.0 38 5825. 4553 1740 142 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 3940.0 59 5320.0 79 2560.0 38 6713. 4984 2082 134 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 480.0 59 700.0 86 260.0 32 814. 662 365 102 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 6680.0 48 9580.0 69 3780.0 27 13910. 10350 4737 103 APR-JUL 6120.0 48 9030.0 71 3220.0 25 12740. 9715 4737 103 BOX CANYON BLO, WA (1) APR-SEP 6960.0 49 9970.0 71 3960.0 28 14090. 10850 4655 97 KETTLE RIVER LAURIER NR, WA APR-SEP 1520.0 77 1890.0 96 1150.0 58 1972. 1569 497 182 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 315.0 40 510.0 66 121.0 16 778. 419 591 101 APR-JUL 300.0 41 495.0 67 103.0 14 739. 393 591 101 COEUR D'ALENE LAKE IN, ID APR-JUL 1010.0 40 1640.0 64 380.0 15 2552. 1367 1546 80 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 1290.0 47 1370.0 50 1210.0 44 2744. 1623 1686 84 ST JOE RIVER CALDER, ID APR-SEP 550.0 46 780.0 65 320.0 27 1205. 867 516 101 APR-JUL 520.0 46 750.0 66 290.0 26 1136. 814 516 101 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 765.0 43 1320.0 75 205.0 12 1766. 847 748 154 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 560.0 41 925.0 69 193.0 14 1350. 807 517 191 APR-SEP 600.0 41 965.0 67 235.0 16 1450. 837 517 191 METHOW RIVER PATEROS NR, WA (1) APR-SEP 300.0 30 545.0 55 53.0 5 985. 674 189 106 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 560.0 47 735.0 62 380.0 32 1185. 973 458 140 WENATCHEE RIVER PESHASTIN, WA APR-SEP 820.0 50 1350.0 83 285.0 17 1635. 1263 794 125 YAKIMA AND MAINSTEM SNAKE BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 60.0 45 86.0 65 34.0 26 133. 97 107 89 CLE ELUM, WA APR-SEP 400.0 44 500.0 55 295.0 33 903. 667 581 92 PARKER NR, WA APR-SEP 760.0 40 980.0 51 540.0 28 1918. 1554 1098 73 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 50.0 42 69.0 58 30.0 25 120. 87 94 93 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 200.0 45 255.0 57 147.0 33 448. 353 266 112 NACHES RIVER NACHES NR, WA APR-SEP 295.0 35 390.0 47 199.0 24 837. 714 323 68 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 58.0 43 76.0 57 41.0 31 134. 100 70 92 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 115.0 48 146.0 60 83.0 34 242. 198 106 73 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 13.5 29 31.0 67 0.0 0 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-SEP 540.0 60 680.0 75 395.0 44 904. 717 162 78 APR-JUL 485.0 60 625.0 77 345.0 42 815. 639 162 78 PALISADES RES INFLOW, ID (1) APR-JUL 1960.0 59 2500.0 75 1410.0 42 3331. 2288 833 76 HEISE NR, ID APR-JUL 2080.0 58 2680.0 75 1470.0 41 3561. 2472 991 78 SHELLEY NR, ID (1) APR-JUL 2650.0 60 3380.0 76 1920.0 43 4428. 2899 1493 80 BLACKFOOT NR, ID (1) APR-JUL 2520.0 55 3280.0 71 1760.0 38 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 895.0 28 1960.0 60 0.0 0 3242. 1071 1750 67 MILNER, ID APR-JUL 78.0 6 78.0 6 78.0 6 1228. 43 116 7 KING HILL, ID (1) APR-JUL 1370.0 45 2320.0 76 415.0 14 3045. 1416 2095 48 MURPHY NR, ID (1) APR-JUL 1380.0 45 2370.0 77 385.0 12 3092. 1399 2176 48 WEISER, ID (1) JAN-JUL 3020.0 31 4770.0 49 1270.0 13 9793. 5271 3215 46 APR-JUL 1660.0 29 3410.0 59 0.0 0 5765. 3085 3215 46 BROWNLEE RES INFLOW APR-JUL 1880.0 30 4030.0 64 0.0 0 6313. 3522 3544 47 HELLS CANYON, ID (1) APR-JUL 1910.0 29 3850.0 59 0.0 0 6493. 3743 3555 47 LOWER GRANITE RES IN, WA (1) JAN-JUL 13300.0 44 18300.0 61 8430.0 28 30020. 23810 7772 56 FEB-SEP 12900.0 42 17800.0 59 8000.0 26 30370. 23940 7772 56 APR-JUL 9880.0 46 14800.0 69 4960.0 23 21550. 16730 7772 56 UPPER SNAKE BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE GREY'S RIVER PALISADES ABV, WY APR-SEP 220.0 56 290.0 74 150.0 38 394. 292 80 87 SALT RIVER ETNA NR, WY APR-JUL 187.0 55 290.0 85 86.0 25 342. 176 144 76 HENRYS FORK ASHTON NR, ID APR-JUL 380.0 67 500.0 88 265.0 46 571. 378 344 67 ST. ANTHONY, ID APR-JUL 450.0 61 665.0 91 235.0 32 734. 382 452 75 REXBURG NR, ID APR-JUL 1020.0 65 1360.0 87 675.0 43 1559. 394 568 58 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 245.0 63 310.0 80 177.0 46 386. 187 79 46 TETON RIVER ST. ANTHONY NR, ID APR-JUL 230.0 57 350.0 87 114.0 28 403. 261 126 73 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 63.0 44 120.0 85 5.6 4 142. 74 49 66 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 27.0 31 58.0 67 0.0 0 86. 13 10 42 PORTNEUF RIVER TOPAZ, ID APR-SEP 57.0 60 79.0 83 36.0 38 95. 39 29 47 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 12.8 44 26.0 90 0.0 0 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 107.0 42 193.0 75 21.0 8 256. 229 47 68 MAGIC RESERVOIR INFLOW, ID APR-JUL 51.0 18 168.0 58 0.0 0 291. 147 15 19 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 32.0 37 61.0 70 1.9 2 87. 56 17 57 MIDDLE SNAKE BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 109.0 52 210.0 101 9.7 5 208. 112 34 46 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 200.0 33 410.0 67 0.0 0 613. 158 157 37 OWYHEE RES OUTFLOW APR-JUL 8.9 4 113.0 52 0.0 0 217. 30 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 265.0 42 385.0 61 147.0 23 636. 586 136 64 BOISE NR, ID (1) APR-JUL 480.0 34 775.0 55 183.0 13 1414. 1129 272 49 PARMA NR, ID APR-JUL 57.0 10 97.0 16 17.7 3 593. 195 253 43 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 184.0 34 290.0 54 79.0 15 542. 393 86 57 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 36.0 33 71.0 65 1.8 2 110. 60 38 48 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 30.0 37 46.0 57 12.9 16 81. 46 26 53 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 500.0 31 870.0 54 128.0 8 1617. 1490 360 55 EMMETT NR, ID APR-JUL 275.0 22 590.0 47 89.0 7 1246. 1177 331 44 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 54.0 40 79.0 59 29.0 22 134. 133 23 69 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 185.0 37 300.0 61 68.0 14 495. 530 114 54 WEISER RIVER WEISER NR, ID (1) APR-JUL 136.0 35 310.0 79 0.0 0 391. 369 94 24 BURNT RIVER HEREFORD NR, OR MAR-JUL 14.8 29 29.0 57 0.4 1 51. 28 13 41 LOWER SNAKE AND CENTRAL OREGON BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE POWDER RIVER SUMPTER NR, OR MAR-JUL 28.0 40 43.0 61 12.9 18 70. 45 11 47 IMNAHA RIVER IMNAHA, OR MAR-JUL 124.0 41 200.0 66 47.0 16 301. 261 55 58 SALMON RIVER SALMON, ID (1) APR-JUL 470.0 55 780.0 91 161.0 19 857. 676 314 70 WHITEBIRD, ID (1) JAN-JUL 3430.0 50 4820.0 71 2040.0 30 6805. 5978 1310 70 APR-JUL 2910.0 50 4300.0 73 1520.0 26 5851. 5081 1310 70 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 86.0 35 147.0 59 25.0 10 249. 191 43 31 APR-JUL 80.0 43 141.0 77 19.2 10 184. 130 43 31 TROY, OR (1) MAR-JUL 760.0 48 1170.0 74 355.0 22 1578. 1410 310 35 APR-JUL 730.0 57 1140.0 89 325.0 26 1274. 1032 310 35 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 2420.0 52 3690.0 79 1150.0 25 4645. 4382 1358 82 SPALDING, ID (1) JAN-JUL 5010.0 52 6780.0 70 3230.0 33 9683. 9879 2673 81 APR-JUL 3710.0 50 5490.0 74 1930.0 26 7435. 6870 2673 81 APR-SEP 3930.0 50 5700.0 73 2150.0 27 7849. 7159 2673 81 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 1820.0 51 2440.0 69 1200.0 34 3547. 3564 1261 93 APR-JUL 1230.0 47 1850.0 70 615.0 23 2644. 2300 1261 93 APR-SEP 1310.0 47 1930.0 69 685.0 24 2803. 2399 1261 93 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 36.0 68 48.0 91 24.0 45 53. 48 29 47 UMATILLA RIVER GIBBON NR, OR APR-JUL 35.0 48 61.0 84 9.5 13 73. 66 38 41 PENDLETON, OR APR-JUL 59.0 40 125.0 84 0.0 0 149. 111 64 28 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 69.0 43 113.0 71 24.0 15 160. 0 APR-JUL 53.0 43 97.0 79 8.4 7 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 240.0 40 450.0 75 34.0 6 597. 471 114 25 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 375.0 33 720.0 62 26.0 2 1153. 842 200 28 APR-SEP 350.0 40 700.0 81 2.9 0 865. 636 200 28 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 380.0 72 415.0 79 340.0 64 528. 0 Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 59.0 32 117.0 64 0.6 0 184. 68 39 24 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 11.6 32 26.0 72 0.0 0 36. 17 6 20 WESTSIDE AND SOUTHERN OREGON BASINS Mar-05MIDMN 1 W A T E R S U P P L Y F O R E C A S T S FORECAST RUNOFF AVERAGE RO PREV YR CURR WY STREAM AND STATION PERIOD PROBABLE % MAXIMUM % MINIMUM % RUNOFF PERIOD RO TO DATE SKAGIT RIVER CONCRETE NR, WA APR-SEP 3540.0 56 4790.0 75 2290.0 36 6365. 4616 4956 105 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 1690.0 53 2560.0 80 820.0 25 3217. 3163 1651 61 APR-JUL 975.0 58 1850.0 110 106.0 6 1689. 1284 1651 61 APR-SEP 1110.0 58 1980.0 103 245.0 13 1922. 1464 1651 61 CASTLE ROCK, WA APR-SEP 1660.0 63 2860.0 108 455.0 17 2639. 1930 2411 57 JAN-JUL 2470.0 52 3670.0 78 1270.0 27 4709. 4567 2411 57 LEWIS RIVER ARIEL, WA JAN-JUL 1170.0 50 1540.0 66 800.0 34 2351. 2532 1448 61 MCKENZIE RIVER VIDA NR, OR APR-SEP 735.0 61 995.0 83 475.0 40 1201. 968 945 51 S. SANTIAM RIVER WATERLOO, OR APR-SEP 345.0 59 595.0 101 98.0 17 587. 509 747 46 N. SANTIAM RIVER MEHAMA, OR APR-SEP 485.0 58 720.0 86 245.0 29 834. 727 833 49 WILLAMETTE RIVER SALEM, OR APR-SEP 2640.0 55 4180.0 87 1100.0 23 4804. 4281 4542 36 CLACKAMAS RIVER ESTACADA, OR APR-SEP 400.0 53 560.0 75 240.0 32 748. 0 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 92.0 61 129.0 85 55.0 36 151. 129 86 63 JAN-JUL 107.0 59 144.0 80 70.0 39 181. 159 86 63 ROGUE RIVER RAYGOLD, OR APR-SEP 455.0 51 585.0 66 325.0 37 889. 786 624 46 JAN-JUL 655.0 41 785.0 50 525.0 33 1584. 1369 624 46 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 46.0 52 82.0 92 9.5 11 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 72.0 56 136.0 105 8.0 6 129. 31 10 17 APR-SEP 71.0 72 134.0 135 6.8 7 99. 27 10 17 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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