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Water Supply Forecasts Northwest River Forecast Center Thursday April 17, 2008 at 15:58 GMT Observed precipitation through the 14th Future precip assumed to be normal No snow included Observed runoff through March note: current month runoff based on OBSERVED + ESP to the end of APR UPPER COLUMBIA BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 9760.0 101 11100.0 115 8460.0 88 9619. 9985 2410 95 FEB-SEP 13100.0 101 14400.0 111 11800.0 91 12960. 12300 2410 95 APR-SEP 12700.0 102 14000.0 112 11400.0 91 12500. 11850 2410 95 REVELSTOKE, BC JAN-JUL 14000.0 101 15100.0 109 12900.0 93 13880. 14190 3502 93 ARROW LAKES INFLOW JAN-JUL 20400.0 97 22400.0 107 18400.0 88 20960. 20790 5251 77 FEB-SEP 25800.0 98 27800.0 105 23800.0 90 26460. 24050 5251 77 APR-SEP 24900.0 99 26900.0 107 22900.0 91 25110. 22920 5251 77 BIRCHBANK, BC (1) JAN-JUL 37400.0 96 41800.0 107 32900.0 85 38930. 41180 9627 76 APR-SEP 42500.0 98 47000.0 108 38100.0 88 43500. 42860 9627 76 GRAND COULEE, WA (1) JAN-JUL 59900.0 95 66600.0 106 53100.0 84 62900. 66890 16390 66 APR-SEP 63600.0 99 70300.0 110 56800.0 89 63990. 63870 16390 66 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 66000.0 96 73800.0 107 58200.0 84 68910. 71930 17170 64 APR-SEP 69900.0 101 77700.0 112 62100.0 89 69540. 68910 17170 64 THE DALLES NR, OR (1) JAN-JUL 98200.0 92 109000.0 102 87300.0 81 107300. 114700 34780 65 APR-AUG 91900.0 99 103000.0 111 81000.0 87 93090. 97540 34780 65 APR-SEP 97400.0 99 108000.0 109 86500.0 88 98650. 101700 34780 65 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 6010.0 95 7210.0 114 4810.0 76 6306. 6909 1343 64 APR-AUG 6130.0 98 7330.0 117 4930.0 79 6248. 6628 1343 64 APR-SEP 6500.0 98 7700.0 116 5300.0 80 6638. 6922 1343 64 LEONIA, ID (1) APR-JUL 7170.0 102 8650.0 123 5690.0 81 7041. 7768 1915 63 APR-SEP 8270.0 102 9750.0 120 6790.0 84 8125. 8545 1915 63 BONNERS FERRY, ID APR-JUL 7830.0 103 9320.0 122 6370.0 84 7619. 8380 2060 62 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 15000.0 94 17200.0 107 12900.0 81 16010. 17210 3509 63 APR-SEP 16000.0 97 18500.0 112 13500.0 82 16450. 16790 3509 63 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1780.0 99 2140.0 119 1420.0 79 1800. 2033 388 79 FEB-SEP 2280.0 99 2640.0 115 1920.0 83 2305. 2361 388 79 APR-SEP 2220.0 100 2580.0 116 1860.0 84 2227. 2291 388 79 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 700.0 99 920.0 131 480.0 68 704. 504 331 75 MISSOULA ABV, MT APR-SEP 1550.0 97 1930.0 121 1160.0 73 1595. 1344 559 69 MISSOULA BLO, MT APR-SEP 3080.0 104 3690.0 125 2480.0 84 2962. 2770 933 69 ST. REGIS, MT (1) APR-SEP 4150.0 106 5050.0 129 3250.0 83 3907. 3648 1266 68 PLAINS NR, MT (1) APR-SEP 11300.0 102 13200.0 119 9420.0 85 11060. 10840 2675 58 WHITEHORSE RAPIDS, ID (1) APR-SEP 12800.0 103 15100.0 121 10500.0 84 12460. 12060 2932 53 BLACKFOOT RIVER BONNER NR, MT APR-SEP 840.0 94 1090.0 122 595.0 67 892. 840 229 62 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1530.0 112 1790.0 131 1270.0 93 1364. 1319 379 70 Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1910.0 106 2220.0 123 1590.0 88 1801. 1780 309 55 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1760.0 101 2030.0 117 1500.0 86 1740. 1737 298 55 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2090.0 94 2520.0 113 1660.0 75 2224. 2357 428 57 APR-SEP 2070.0 97 2500.0 118 1640.0 77 2124. 2175 428 57 UPPER/MIDDLE COLUMBIA BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5860.0 101 6900.0 118 4820.0 83 5825. 6002 1038 53 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6740.0 100 8030.0 120 5450.0 81 6713. 7002 1478 61 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 820.0 101 1020.0 125 620.0 76 814. 997 333 60 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 14100.0 101 16600.0 119 11600.0 83 13910. 14260 4181 62 APR-JUL 12900.0 101 15400.0 121 10400.0 82 12740. 13520 4181 62 BOX CANYON BLO, WA (1) APR-SEP 14500.0 103 17100.0 121 11900.0 84 14090. 14500 4281 61 KETTLE RIVER LAURIER NR, WA APR-SEP 1810.0 92 2160.0 110 1460.0 74 1972. 2366 183 30 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 905.0 116 1070.0 138 745.0 96 778. 871 395 45 APR-JUL 860.0 116 1020.0 138 700.0 95 739. 841 395 45 COEUR D'ALENE LAKE IN, ID APR-JUL 3010.0 118 3540.0 139 2490.0 98 2552. 2456 1590 56 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 3260.0 119 3340.0 122 3190.0 116 2744. 2705 1579 55 ST JOE RIVER CALDER, ID APR-SEP 1470.0 122 1660.0 138 1290.0 107 1205. 1263 350 43 APR-JUL 1390.0 122 1580.0 139 1210.0 107 1136. 1203 350 43 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1490.0 84 2010.0 114 975.0 55 1766. 1470 440 66 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1130.0 84 1460.0 108 790.0 59 1350. 1079 284 72 APR-SEP 1210.0 83 1540.0 106 875.0 60 1450. 1122 284 72 METHOW RIVER PATEROS NR, WA (1) APR-SEP 820.0 83 1050.0 107 590.0 60 985. 1144 198 70 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1110.0 94 1250.0 105 965.0 81 1185. 1345 305 66 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1710.0 105 2220.0 136 1190.0 73 1635. 1669 489 57 YAKIMA AND MAINSTEM SNAKE BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 166.0 125 192.0 144 139.0 105 133. 137 86 57 CLE ELUM, WA APR-SEP 1090.0 121 1200.0 133 975.0 108 903. 906 434 53 PARKER NR, WA APR-SEP 2270.0 118 2490.0 130 2050.0 107 1918. 2346 1140 59 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 150.0 125 168.0 140 132.0 110 120. 122 76 59 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 550.0 123 600.0 134 500.0 112 448. 475 178 57 NACHES RIVER NACHES NR, WA APR-SEP 895.0 107 1010.0 121 780.0 93 837. 1086 415 66 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 147.0 110 170.0 127 124.0 93 134. 154 64 67 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 255.0 105 290.0 120 225.0 93 242. 244 118 65 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 48.0 104 64.0 139 32.0 70 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 835.0 102 965.0 118 710.0 87 815. 812 243 90 APR-SEP 925.0 102 1050.0 116 800.0 88 904. 861 243 90 PALISADES RES INFLOW, ID (1) APR-JUL 3260.0 98 3720.0 112 2790.0 84 3331. 3267 1085 75 APR-SEP 3790.0 98 4250.0 110 3330.0 86 3875. 3672 1085 75 HEISE NR, ID APR-JUL 3480.0 98 3980.0 112 2970.0 83 3561. 3618 1229 74 APR-SEP 4070.0 98 4570.0 110 3560.0 86 4159. 4188 1229 74 SHELLEY NR, ID (1) APR-JUL 4560.0 103 5210.0 118 3920.0 89 4428. 4634 1899 80 APR-SEP 5480.0 103 6130.0 115 4840.0 91 5324. 5339 1899 80 BLACKFOOT NR, ID (1) APR-JUL 4590.0 100 5250.0 114 3930.0 85 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 3140.0 97 4090.0 126 2200.0 68 3242. 2929 2286 72 MILNER, ID APR-JUL 260.0 21 1010.0 82 168.0 14 1228. 996 189 9 KING HILL, ID (1) APR-JUL 1890.0 62 2770.0 91 1010.0 33 3045. 3030 3004 57 MURPHY NR, ID (1) APR-JUL 2000.0 65 2940.0 95 1070.0 35 3092. 3104 3041 56 WEISER, ID (1) JAN-JUL 6420.0 66 7990.0 82 4850.0 50 9793. 12140 4855 56 APR-JUL 4380.0 76 5950.0 103 2820.0 49 5765. 8160 4855 56 APR-SEP 5800.0 81 7370.0 102 4240.0 59 7192. 9471 4855 56 BROWNLEE RES INFLOW APR-JUL 4990.0 79 6890.0 109 3090.0 49 6313. 8975 5268 56 APR-SEP 6330.0 81 8230.0 105 4430.0 57 7801. 10350 5268 56 HELLS CANYON, ID (1) APR-JUL 5140.0 79 6880.0 106 3400.0 52 6493. 9324 5449 57 APR-SEP 6590.0 83 8330.0 104 4850.0 61 7977. 10740 5449 57 LOWER GRANITE RES IN, WA (1) JAN-JUL 27200.0 91 31400.0 105 23100.0 77 30020. 32200 11320 61 FEB-SEP 28400.0 94 32600.0 107 24300.0 80 30370. 31790 11320 61 APR-JUL 22600.0 105 26700.0 124 18400.0 85 21550. 24440 11320 61 APR-SEP 24900.0 103 29100.0 121 20800.0 86 24140. 26590 11320 61 UPPER SNAKE BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 380.0 96 435.0 110 330.0 84 394. 401 141 107 SALT RIVER ETNA NR, WY APR-JUL 335.0 98 415.0 121 250.0 73 342. 363 170 68 HENRYS FORK ASHTON NR, ID APR-JUL 560.0 98 680.0 119 445.0 78 571. 659 458 73 ST. ANTHONY, ID APR-JUL 725.0 99 885.0 121 560.0 76 734. 819 563 76 REXBURG NR, ID APR-JUL 1500.0 96 1760.0 113 1240.0 80 1559. 1016 807 67 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 370.0 96 440.0 114 305.0 79 386. 370 126 58 TETON RIVER ST. ANTHONY NR, ID APR-JUL 400.0 99 480.0 119 320.0 79 403. 464 170 78 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 130.0 92 163.0 115 97.0 68 142. 229 59 68 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 76.0 88 105.0 122 47.0 55 86. 94 18 37 PORTNEUF RIVER TOPAZ, ID APR-SEP 84.0 88 96.0 101 72.0 76 95. 120 54 68 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 25.0 86 35.0 121 14.5 50 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 235.0 92 315.0 123 158.0 62 256. 431 65 65 MAGIC RESERVOIR INFLOW, ID APR-JUL 260.0 89 360.0 124 161.0 55 291. 591 45 27 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 80.0 92 105.0 121 55.0 63 87. 163 28 52 MIDDLE SNAKE BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 194.0 93 275.0 132 115.0 55 208. 276 56 46 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 485.0 79 635.0 104 335.0 55 613. 1050 339 56 OWYHEE RES OUTFLOW APR-JUL 19.3 9 36.0 17 11.8 5 217. 594 26 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 640.0 101 745.0 117 530.0 83 636. 828 272 80 BOISE NR, ID (1) APR-JUL 1390.0 98 1630.0 115 1150.0 81 1414. 2060 566 64 PARMA NR, ID APR-JUL 340.0 57 555.0 94 125.0 21 593. 1102 326 42 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 520.0 96 625.0 115 415.0 77 542. 816 152 57 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 112.0 102 123.0 112 102.0 93 110. 239 65 56 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 89.0 110 97.0 120 82.0 101 81. 155 47 66 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1670.0 103 1990.0 123 1340.0 83 1617. 2214 691 70 EMMETT NR, ID APR-JUL 1360.0 109 1700.0 136 1000.0 80 1246. 1977 683 65 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 137.0 102 161.0 120 113.0 84 134. 180 40 78 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 520.0 105 625.0 126 415.0 84 495. 684 223 73 WEISER RIVER WEISER NR, ID (1) APR-JUL 430.0 110 570.0 146 290.0 74 391. 717 423 81 BURNT RIVER HEREFORD NR, OR MAR-JUL 52.0 102 61.0 120 43.0 84 51. 81 LOWER SNAKE AND CENTRAL OREGON BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 71.0 101 85.0 121 57.0 81 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 325.0 108 380.0 126 270.0 90 301. 394 89 59 SALMON RIVER SALMON, ID (1) APR-JUL 810.0 95 1100.0 128 520.0 61 857. 1078 458 84 WHITEBIRD, ID (1) JAN-JUL 6770.0 99 7900.0 116 5650.0 83 6805. 7274 2034 79 APR-JUL 6000.0 103 7130.0 122 4880.0 83 5851. 6441 2034 79 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 245.0 98 285.0 114 210.0 84 249. 238 152 71 APR-JUL 199.0 108 240.0 130 160.0 87 184. 202 152 71 TROY, OR (1) MAR-JUL 1730.0 110 2130.0 135 1330.0 84 1578. 1573 803 64 APR-JUL 1520.0 119 1920.0 151 1120.0 88 1274. 1369 803 64 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 5370.0 116 6500.0 140 4230.0 91 4645. 4316 1436 56 SPALDING, ID (1) JAN-JUL 9970.0 103 11600.0 120 8370.0 86 9683. 9175 2752 55 APR-JUL 8860.0 119 10500.0 141 7260.0 98 7435. 7274 2752 55 APR-SEP 9280.0 118 10900.0 139 7680.0 98 7849. 7550 2752 55 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3500.0 99 4000.0 113 3000.0 85 3547. 3507 1015 50 APR-JUL 3110.0 118 3610.0 137 2610.0 99 2644. 2676 1015 50 APR-SEP 3300.0 118 3800.0 136 2800.0 100 2803. 2786 1015 50 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 60.0 113 71.0 134 50.0 94 53. 63 70 90 UMATILLA RIVER GIBBON NR, OR APR-JUL 84.0 115 102.0 140 66.0 90 73. 86 96 78 PENDLETON, OR APR-JUL 173.0 116 210.0 141 135.0 91 149. 178 238 80 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 153.0 96 179.0 112 128.0 80 160. 0 APR-JUL 145.0 118 171.0 139 120.0 98 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 690.0 116 830.0 139 545.0 91 597. 745 477 71 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1200.0 104 1500.0 130 900.0 78 1153. 1235 654 64 APR-SEP 990.0 114 1290.0 149 690.0 80 865. 1038 654 64 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 515.0 98 545.0 103 485.0 92 528. 497 539 95 Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 155.0 84 188.0 102 123.0 67 184. 316 104 46 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 37.0 103 49.0 136 25.0 69 36. 59 WESTSIDE AND SOUTHERN OREGON BASINS Apr-08 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6530.0 103 7670.0 121 5400.0 85 6365. 5621 4549 82 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3180.0 99 3990.0 124 2370.0 74 3217. 3453 2415 76 APR-JUL 2000.0 118 2800.0 166 1190.0 70 1689. 1642 2415 76 APR-SEP 2270.0 118 3080.0 160 1460.0 76 1922. 1817 2415 76 CASTLE ROCK, WA APR-SEP 3000.0 114 4110.0 156 1890.0 72 2639. 2380 4062 82 JAN-JUL 4640.0 99 5750.0 122 3530.0 75 4709. 5136 4062 82 LEWIS RIVER ARIEL, WA JAN-JUL 2320.0 99 2480.0 105 2150.0 91 2351. 2514 2149 79 MCKENZIE RIVER VIDA NR, OR APR-SEP 1400.0 117 1550.0 129 1250.0 104 1201. 1142 2074 97 S. SANTIAM RIVER WATERLOO, OR APR-SEP 705.0 120 880.0 150 535.0 91 587. 540 1802 96 N. SANTIAM RIVER MEHAMA, OR APR-SEP 1000.0 120 1210.0 145 795.0 95 834. 754 1868 96 WILLAMETTE RIVER SALEM, OR APR-SEP 5530.0 115 6560.0 137 4500.0 94 4804. 4373 13520 94 CLACKAMAS RIVER ESTACADA, OR APR-SEP 985.0 132 1100.0 147 880.0 118 748. 678 1358 88 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 174.0 115 195.0 129 153.0 101 151. 156 143 88 JAN-JUL 192.0 106 215.0 119 171.0 94 181. 195 143 88 ROGUE RIVER RAYGOLD, OR APR-SEP 1000.0 112 1090.0 123 905.0 102 889. 895 1426 88 JAN-JUL 1630.0 103 1720.0 109 1530.0 97 1584. 1970 1426 88 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 68.0 76 90.0 101 45.0 51 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 128.0 99 174.0 135 83.0 64 129. 196 APR-SEP 130.0 131 176.0 178 84.0 85 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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