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Water Supply Forecasts Northwest River Forecast Center Thursday March 27, 2008 at 20:48 GMT Observed precipitation through the 24th Future precip assumed to be normal Snow included in this run Observed runoff through February note: current month runoff based on OBSERVED + ESP to the end of MAR UPPER COLUMBIA BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 9830.0 102 11200.0 116 8500.0 88 9619. 9985 2130 104 FEB-SEP 13200.0 102 14500.0 112 11900.0 92 12960. 12300 2130 104 APR-SEP 12800.0 102 14100.0 113 11400.0 91 12500. 11850 2130 104 REVELSTOKE, BC JAN-JUL 14200.0 102 15300.0 110 13100.0 94 13880. 14190 3091 105 ARROW LAKES INFLOW JAN-JUL 20700.0 99 22700.0 108 18600.0 89 20960. 20790 4456 84 FEB-SEP 26200.0 99 28300.0 107 24200.0 91 26460. 24050 4456 84 APR-SEP 25300.0 101 27400.0 109 23300.0 93 25110. 22920 4456 84 BIRCHBANK, BC (1) JAN-JUL 38200.0 98 43400.0 111 32900.0 85 38930. 41180 8186 88 APR-SEP 43500.0 100 48800.0 112 38300.0 88 43500. 42860 8186 88 GRAND COULEE, WA (1) JAN-JUL 61300.0 97 69900.0 111 52800.0 84 62900. 66890 13230 76 APR-SEP 65300.0 102 73800.0 115 56700.0 89 63990. 63870 13230 76 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 67700.0 98 77100.0 112 58200.0 84 68910. 71930 13910 74 APR-SEP 71800.0 103 81300.0 117 62400.0 90 69540. 68910 13910 74 THE DALLES NR, OR (1) JAN-JUL 102000.0 95 115000.0 107 88100.0 82 107300. 114700 27890 71 APR-AUG 95800.0 103 109000.0 117 82300.0 88 93090. 97540 27890 71 APR-SEP 101000.0 102 115000.0 117 87500.0 89 98650. 101700 27890 71 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 6080.0 96 7380.0 117 4780.0 76 6306. 6909 1155 74 APR-AUG 6200.0 99 7500.0 120 4900.0 78 6248. 6628 1155 74 APR-SEP 6580.0 99 7880.0 119 5280.0 80 6638. 6922 1155 74 LEONIA, ID (1) APR-JUL 7250.0 103 8830.0 125 5670.0 81 7041. 7768 1540 71 APR-SEP 8360.0 103 9940.0 122 6780.0 83 8125. 8545 1540 71 BONNERS FERRY, ID APR-JUL 7930.0 104 9490.0 125 6380.0 84 7619. 8380 1653 71 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 15600.0 97 18000.0 112 13200.0 82 16010. 17210 2939 75 APR-SEP 16500.0 100 19300.0 117 13800.0 84 16450. 16790 2939 75 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1790.0 99 2170.0 121 1420.0 79 1800. 2033 343 91 FEB-SEP 2300.0 100 2670.0 116 1920.0 83 2305. 2361 343 91 APR-SEP 2240.0 101 2610.0 117 1860.0 84 2227. 2291 343 91 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 710.0 101 1040.0 148 380.0 54 704. 504 261 76 MISSOULA ABV, MT APR-SEP 1570.0 98 2030.0 127 1110.0 70 1595. 1344 438 75 MISSOULA BLO, MT APR-SEP 3080.0 104 3780.0 128 2390.0 81 2962. 2770 747 77 ST. REGIS, MT (1) APR-SEP 4150.0 106 5220.0 134 3080.0 79 3907. 3648 1013 76 PLAINS NR, MT (1) APR-SEP 11300.0 102 13600.0 123 9050.0 82 11060. 10840 2105 67 WHITEHORSE RAPIDS, ID (1) APR-SEP 12700.0 102 15400.0 124 10100.0 81 12460. 12060 2254 60 BLACKFOOT RIVER BONNER NR, MT APR-SEP 855.0 96 1140.0 128 570.0 64 892. 840 178 74 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1510.0 111 1790.0 131 1220.0 89 1364. 1319 316 81 Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1920.0 107 2270.0 126 1570.0 87 1801. 1780 239 66 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1770.0 102 2050.0 118 1480.0 85 1740. 1737 234 67 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2080.0 94 2520.0 113 1640.0 74 2224. 2357 306 66 APR-SEP 2060.0 97 2500.0 118 1620.0 76 2124. 2175 306 66 UPPER/MIDDLE COLUMBIA BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5900.0 101 7170.0 123 4630.0 79 5825. 6002 784 64 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6790.0 101 8170.0 122 5410.0 81 6713. 7002 1137 73 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 895.0 110 1120.0 138 675.0 83 814. 997 244 68 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 14300.0 103 17200.0 124 11400.0 82 13910. 14260 3217 70 APR-JUL 13100.0 103 16000.0 126 10200.0 80 12740. 13520 3217 70 BOX CANYON BLO, WA (1) APR-SEP 14700.0 104 17700.0 126 11700.0 83 14090. 14500 3281 69 KETTLE RIVER LAURIER NR, WA APR-SEP 1950.0 99 2320.0 118 1580.0 80 1972. 2366 141 52 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 930.0 120 1130.0 145 735.0 94 778. 871 259 44 APR-JUL 885.0 120 1080.0 146 690.0 93 739. 841 259 44 COEUR D'ALENE LAKE IN, ID APR-JUL 3030.0 119 3670.0 144 2400.0 94 2552. 2456 1087 56 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 3460.0 126 3550.0 129 3380.0 123 2744. 2705 1123 56 ST JOE RIVER CALDER, ID APR-SEP 1420.0 118 1660.0 138 1190.0 99 1205. 1263 250 49 APR-JUL 1340.0 118 1570.0 138 1110.0 98 1136. 1203 250 49 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1470.0 83 2030.0 115 910.0 52 1766. 1470 364 75 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1140.0 84 1500.0 111 770.0 57 1350. 1079 236 87 APR-SEP 1220.0 84 1590.0 110 855.0 59 1450. 1122 236 87 METHOW RIVER PATEROS NR, WA (1) APR-SEP 935.0 95 1180.0 120 690.0 70 985. 1144 157 88 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1140.0 96 1310.0 111 960.0 81 1185. 1345 267 81 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1760.0 108 2300.0 141 1230.0 75 1635. 1669 411 65 YAKIMA AND MAINSTEM SNAKE BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 164.0 123 190.0 143 137.0 103 133. 137 76 63 CLE ELUM, WA APR-SEP 1070.0 118 1170.0 130 965.0 107 903. 906 372 59 PARKER NR, WA APR-SEP 2220.0 116 2430.0 127 2000.0 104 1918. 2346 949 63 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 147.0 123 166.0 138 127.0 106 120. 122 67 66 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 540.0 121 595.0 133 485.0 108 448. 475 155 65 NACHES RIVER NACHES NR, WA APR-SEP 905.0 108 1000.0 119 810.0 97 837. 1086 330 70 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 147.0 110 165.0 123 130.0 97 134. 154 58 76 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 260.0 107 290.0 120 230.0 95 242. 244 103 71 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 49.0 107 66.0 143 32.0 70 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 815.0 100 960.0 118 675.0 83 815. 812 205 99 APR-SEP 905.0 100 1040.0 115 760.0 84 904. 861 205 99 PALISADES RES INFLOW, ID (1) APR-JUL 3270.0 98 3810.0 114 2720.0 82 3331. 3267 907 83 APR-SEP 3810.0 98 4350.0 112 3270.0 84 3875. 3672 907 83 HEISE NR, ID APR-JUL 3490.0 98 4100.0 115 2880.0 81 3561. 3618 1027 81 APR-SEP 4070.0 98 4680.0 113 3460.0 83 4159. 4188 1027 81 SHELLEY NR, ID (1) APR-JUL 4570.0 103 5310.0 120 3840.0 87 4428. 4634 1605 86 APR-SEP 5500.0 103 6230.0 117 4760.0 89 5324. 5339 1605 86 BLACKFOOT NR, ID (1) APR-JUL 4600.0 100 5360.0 116 3840.0 83 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 3150.0 97 4220.0 130 2090.0 64 3242. 2929 1984 76 MILNER, ID APR-JUL 495.0 40 1350.0 110 186.0 15 1228. 996 179 11 KING HILL, ID (1) APR-JUL 2160.0 71 3110.0 102 1200.0 39 3045. 3030 2604 60 MURPHY NR, ID (1) APR-JUL 2280.0 74 3270.0 106 1280.0 41 3092. 3104 2642 58 WEISER, ID (1) JAN-JUL 6870.0 70 8620.0 88 5120.0 52 9793. 12140 4027 58 APR-JUL 4800.0 83 6540.0 113 3050.0 53 5765. 8160 4027 58 APR-SEP 6240.0 87 7980.0 111 4490.0 62 7192. 9471 4027 58 BROWNLEE RES INFLOW APR-JUL 5440.0 86 7600.0 120 3280.0 52 6313. 8975 4351 58 APR-SEP 6880.0 88 9040.0 116 4720.0 61 7801. 10350 4351 58 HELLS CANYON, ID (1) APR-JUL 5610.0 86 7550.0 116 3660.0 56 6493. 9324 4461 59 APR-SEP 7080.0 89 9020.0 113 5140.0 64 7977. 10740 4461 59 LOWER GRANITE RES IN, WA (1) JAN-JUL 28300.0 94 33200.0 111 23300.0 78 30020. 32200 8745 63 FEB-SEP 29500.0 97 34400.0 113 24600.0 81 30370. 31790 8745 63 APR-JUL 23500.0 109 28400.0 132 18600.0 86 21550. 24440 8745 63 APR-SEP 25900.0 107 30800.0 128 21000.0 87 24140. 26590 8745 63 UPPER SNAKE BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 365.0 93 430.0 109 295.0 75 394. 401 150 163 SALT RIVER ETNA NR, WY APR-JUL 310.0 91 410.0 120 210.0 61 342. 363 143 76 HENRYS FORK ASHTON NR, ID APR-JUL 560.0 98 675.0 118 440.0 77 571. 659 406 80 ST. ANTHONY, ID APR-JUL 725.0 99 945.0 129 510.0 69 734. 819 475 79 REXBURG NR, ID APR-JUL 1500.0 96 1850.0 119 1160.0 74 1559. 1016 687 70 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 370.0 96 435.0 113 300.0 78 386. 370 107 62 TETON RIVER ST. ANTHONY NR, ID APR-JUL 405.0 100 520.0 129 285.0 71 403. 464 142 82 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 132.0 93 190.0 134 75.0 53 142. 229 51 69 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 79.0 92 110.0 128 48.0 56 86. 94 11 47 PORTNEUF RIVER TOPAZ, ID APR-SEP 87.0 92 108.0 114 66.0 69 95. 120 38 61 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 25.0 86 39.0 134 11.6 40 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 245.0 96 330.0 129 160.0 63 256. 431 51 74 MAGIC RESERVOIR INFLOW, ID APR-JUL 275.0 95 395.0 136 160.0 55 291. 591 25 31 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 86.0 99 116.0 133 57.0 66 87. 163 19 64 MIDDLE SNAKE BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 205.0 99 305.0 147 106.0 51 208. 276 34 46 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 545.0 89 755.0 123 335.0 55 613. 1050 197 46 OWYHEE RES OUTFLOW APR-JUL 36.0 17 215.0 99 16.3 8 217. 594 15 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 635.0 100 750.0 118 515.0 81 636. 828 187 87 BOISE NR, ID (1) APR-JUL 1390.0 98 1680.0 119 1090.0 77 1414. 2060 383 70 PARMA NR, ID APR-JUL 295.0 50 555.0 94 110.0 19 593. 1102 288 49 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 525.0 97 630.0 116 420.0 77 542. 816 112 74 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 117.0 106 152.0 138 83.0 75 110. 239 36 46 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 86.0 106 103.0 127 69.0 85 81. 155 29 60 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1710.0 106 2080.0 129 1340.0 83 1617. 2214 532 81 EMMETT NR, ID APR-JUL 1520.0 122 1920.0 154 1130.0 91 1246. 1977 501 66 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 141.0 105 166.0 124 116.0 87 134. 180 32 96 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 540.0 109 660.0 133 425.0 86 495. 684 193 92 WEISER RIVER WEISER NR, ID (1) APR-JUL 435.0 111 610.0 156 265.0 68 391. 717 294 76 BURNT RIVER HEREFORD NR, OR MAR-JUL 57.0 112 71.0 139 43.0 84 51. 81 LOWER SNAKE AND CENTRAL OREGON BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 75.0 107 90.0 129 60.0 86 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 340.0 113 420.0 140 265.0 88 301. 394 62 65 SALMON RIVER SALMON, ID (1) APR-JUL 855.0 100 1160.0 135 545.0 64 857. 1078 392 88 WHITEBIRD, ID (1) JAN-JUL 6890.0 101 8280.0 122 5500.0 81 6805. 7274 1664 89 APR-JUL 6120.0 105 7510.0 128 4730.0 81 5851. 6441 1664 89 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 255.0 102 320.0 129 196.0 79 249. 238 85 62 APR-JUL 205.0 111 270.0 147 146.0 79 184. 202 85 62 TROY, OR (1) MAR-JUL 1860.0 118 2260.0 143 1450.0 92 1578. 1573 544 61 APR-JUL 1640.0 129 2050.0 161 1240.0 97 1274. 1369 544 61 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 5370.0 116 6640.0 143 4100.0 88 4645. 4316 1029 62 SPALDING, ID (1) JAN-JUL 10200.0 105 11900.0 123 8390.0 87 9683. 9175 1963 59 APR-JUL 8980.0 121 10800.0 145 7200.0 97 7435. 7274 1963 59 APR-SEP 9420.0 120 11200.0 143 7640.0 97 7849. 7550 1963 59 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3520.0 99 4140.0 117 2900.0 82 3547. 3507 725 54 APR-JUL 3110.0 118 3730.0 141 2490.0 94 2644. 2676 725 54 APR-SEP 3300.0 118 3920.0 140 2680.0 96 2803. 2786 725 54 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 60.0 113 72.0 136 48.0 91 53. 63 51 83 UMATILLA RIVER GIBBON NR, OR APR-JUL 86.0 118 111.0 152 60.0 82 73. 86 70 76 PENDLETON, OR APR-JUL 178.0 119 245.0 164 111.0 74 149. 178 168 74 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 194.0 121 240.0 150 149.0 93 160. 0 APR-JUL 151.0 123 195.0 159 106.0 86 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 715.0 120 925.0 155 510.0 85 597. 745 306 68 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1250.0 108 1590.0 138 900.0 78 1153. 1235 429 61 APR-SEP 1040.0 120 1390.0 161 690.0 80 865. 1038 429 61 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 570.0 108 605.0 115 535.0 101 528. 497 469 96 Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 199.0 108 255.0 139 141.0 77 184. 316 66 41 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 39.0 108 54.0 150 24.0 67 36. 59 WESTSIDE AND SOUTHERN OREGON BASINS Apr-08 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6600.0 104 7850.0 123 5350.0 84 6365. 5621 4053 86 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3110.0 97 3980.0 124 2240.0 70 3217. 3453 2095 77 APR-JUL 1930.0 114 2800.0 166 1060.0 63 1689. 1642 2095 77 APR-SEP 2200.0 114 3070.0 160 1330.0 69 1922. 1817 2095 77 CASTLE ROCK, WA APR-SEP 2920.0 111 4120.0 156 1710.0 65 2639. 2380 3578 84 JAN-JUL 4580.0 97 5780.0 123 3370.0 72 4709. 5136 3578 84 LEWIS RIVER ARIEL, WA JAN-JUL 2230.0 95 2600.0 111 1860.0 79 2351. 2514 1812 76 MCKENZIE RIVER VIDA NR, OR APR-SEP 1330.0 111 1590.0 132 1070.0 89 1201. 1142 1794 98 S. SANTIAM RIVER WATERLOO, OR APR-SEP 685.0 117 935.0 159 435.0 74 587. 540 1600 97 N. SANTIAM RIVER MEHAMA, OR APR-SEP 960.0 115 1200.0 144 720.0 86 834. 754 1630 96 WILLAMETTE RIVER SALEM, OR APR-SEP 5400.0 112 6940.0 144 3850.0 80 4804. 4373 12090 96 CLACKAMAS RIVER ESTACADA, OR APR-SEP 925.0 124 1080.0 144 765.0 102 748. 678 1159 87 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 161.0 107 199.0 132 124.0 82 151. 156 114 83 JAN-JUL 172.0 95 210.0 116 135.0 75 181. 195 114 83 ROGUE RIVER RAYGOLD, OR APR-SEP 965.0 109 1090.0 123 835.0 94 889. 895 1208 88 JAN-JUL 1600.0 101 1730.0 109 1470.0 93 1584. 1970 1208 88 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 74.0 83 110.0 124 38.0 43 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 139.0 108 205.0 159 75.0 58 129. 196 APR-SEP 131.0 132 195.0 197 67.0 68 99. 167 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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