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Water Supply Forecasts Northwest River Forecast Center Thursday April 19, 2007 at 20:22 GMT Observed precipitation through the 16th 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-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 10800.0 112 12100.0 126 9550.0 99 9619. 9985 2459 97 FEB-SEP 14600.0 113 15900.0 123 13300.0 103 12960. 12300 2459 97 APR-SEP 14100.0 113 15300.0 122 12800.0 102 12500. 11850 2459 97 REVELSTOKE, BC JAN-JUL 15400.0 111 16600.0 120 14400.0 104 13880. 14190 3474 93 ARROW LAKES INFLOW JAN-JUL 23000.0 110 25000.0 119 21000.0 100 20960. 20790 6137 90 FEB-SEP 29200.0 110 31200.0 118 27200.0 103 26460. 24050 6137 90 APR-SEP 27700.0 110 29700.0 118 25700.0 102 25110. 22920 6137 90 BIRCHBANK, BC (1) JAN-JUL 43000.0 110 47500.0 122 38600.0 99 38930. 41180 13490 107 APR-SEP 47200.0 109 51600.0 119 42700.0 98 43500. 42860 13490 107 GRAND COULEE, WA (1) JAN-JUL 65700.0 104 72500.0 115 59000.0 94 62900. 66890 26550 108 APR-SEP 65300.0 102 72100.0 113 58600.0 92 63990. 63870 26550 108 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 73700.0 107 81500.0 118 65900.0 96 68910. 71930 29620 110 APR-SEP 72700.0 105 80500.0 116 64900.0 93 69540. 68910 29620 110 THE DALLES NR, OR (1) JAN-JUL 100000.0 93 111000.0 103 89100.0 83 107300. 114700 51920 97 APR-AUG 85200.0 92 96100.0 103 74300.0 80 93090. 97540 51920 97 APR-SEP 90300.0 92 101000.0 102 79400.0 80 98650. 101700 51920 97 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 6710.0 106 7910.0 125 5510.0 87 6306. 6909 2416 116 APR-AUG 6480.0 104 7680.0 123 5280.0 85 6248. 6628 2416 116 APR-SEP 6890.0 104 8090.0 122 5690.0 86 6638. 6922 2416 116 LEONIA, ID (1) APR-JUL 7260.0 103 8740.0 124 5780.0 82 7041. 7768 3749 124 APR-SEP 8380.0 103 9860.0 121 6900.0 85 8125. 8545 3749 124 BONNERS FERRY, ID APR-JUL 7670.0 101 9180.0 120 6260.0 82 7619. 8380 4196 125 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 17800.0 111 20000.0 125 15700.0 98 16010. 17210 6703 121 APR-SEP 17700.0 108 20200.0 123 15200.0 92 16450. 16790 6703 121 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1980.0 110 2340.0 130 1620.0 90 1800. 2033 512 104 FEB-SEP 2530.0 110 2890.0 125 2170.0 94 2305. 2361 512 104 APR-SEP 2410.0 108 2770.0 124 2050.0 92 2227. 2291 512 104 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 545.0 77 770.0 109 325.0 46 704. 504 386 88 MISSOULA ABV, MT APR-SEP 1260.0 79 1650.0 103 875.0 55 1595. 1344 808 100 MISSOULA BLO, MT APR-SEP 2300.0 78 2910.0 98 1700.0 57 2962. 2770 1460 108 ST. REGIS, MT (1) APR-SEP 3130.0 80 4030.0 103 2230.0 57 3907. 3648 2024 109 PLAINS NR, MT (1) APR-SEP 9510.0 86 11400.0 103 7610.0 69 11060. 10840 5159 113 WHITEHORSE RAPIDS, ID (1) APR-SEP 10700.0 86 13000.0 104 8430.0 68 12460. 12060 5923 108 BLACKFOOT RIVER BONNER NR, MT APR-SEP 710.0 80 955.0 107 460.0 52 892. 840 423 115 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1050.0 77 1310.0 96 785.0 58 1364. 1319 625 115 Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1700.0 94 2020.0 112 1380.0 77 1801. 1780 879 155 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1530.0 88 1790.0 103 1260.0 72 1740. 1737 770 141 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2030.0 91 2460.0 111 1600.0 72 2224. 2357 901 120 APR-SEP 1790.0 84 2220.0 105 1360.0 64 2124. 2175 901 120 UPPER/MIDDLE COLUMBIA BASINS Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5190.0 89 6220.0 107 4150.0 71 5825. 6002 2503 129 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6020.0 90 7310.0 109 4730.0 70 6713. 7002 3194 132 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 775.0 95 975.0 120 575.0 71 814. 997 715 128 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 12000.0 86 14500.0 104 9540.0 69 13910. 14260 7984 119 APR-JUL 11000.0 86 13500.0 106 8530.0 67 12740. 13520 7984 119 BOX CANYON BLO, WA (1) APR-SEP 12300.0 87 14800.0 105 9700.0 69 14090. 14500 8277 118 KETTLE RIVER LAURIER NR, WA APR-SEP 1900.0 96 2240.0 114 1550.0 79 1972. 2366 578 96 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 660.0 85 820.0 105 495.0 64 778. 871 1059 120 APR-JUL 625.0 85 785.0 106 460.0 62 739. 841 1059 120 COEUR D'ALENE LAKE IN, ID APR-JUL 2110.0 83 2640.0 103 1580.0 62 2552. 2456 2906 103 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2360.0 86 2440.0 89 2290.0 83 2744. 2705 3252 113 ST JOE RIVER CALDER, ID APR-SEP 1030.0 85 1220.0 101 845.0 70 1205. 1263 976 121 APR-JUL 975.0 86 1160.0 102 785.0 69 1136. 1203 976 121 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1890.0 107 2400.0 136 1370.0 78 1766. 1470 1040 157 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1510.0 112 1840.0 136 1170.0 87 1350. 1079 872 220 APR-SEP 1620.0 112 1950.0 134 1280.0 88 1450. 1122 872 220 METHOW RIVER PATEROS NR, WA (1) APR-SEP 1090.0 111 1310.0 133 860.0 87 985. 1144 485 172 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1250.0 105 1390.0 117 1100.0 93 1185. 1345 759 164 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1680.0 103 2190.0 134 1160.0 71 1635. 1669 1199 139 YAKIMA AND MAINSTEM SNAKE BASINS Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 135.0 102 161.0 121 108.0 81 133. 137 174 116 CLE ELUM, WA APR-SEP 910.0 101 1020.0 113 795.0 88 903. 906 1066 130 PARKER NR, WA APR-SEP 1960.0 102 2180.0 114 1730.0 90 1918. 2346 2665 139 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 121.0 101 138.0 115 103.0 86 120. 122 167 129 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 455.0 102 505.0 113 405.0 90 448. 475 431 138 NACHES RIVER NACHES NR, WA APR-SEP 790.0 94 905.0 108 675.0 81 837. 1086 1014 161 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 136.0 101 159.0 119 113.0 84 134. 154 147 153 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 245.0 101 275.0 114 210.0 87 242. 244 251 139 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 41.0 89 57.0 124 25.0 54 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-SEP 665.0 74 795.0 88 540.0 60 904. 861 253 94 APR-JUL 600.0 74 725.0 89 470.0 58 815. 812 253 94 PALISADES RES INFLOW, ID (1) APR-JUL 2250.0 68 2720.0 82 1790.0 54 3331. 3267 1338 92 HEISE NR, ID APR-JUL 2400.0 67 2900.0 81 1890.0 53 3561. 3618 1571 95 SHELLEY NR, ID (1) APR-JUL 3080.0 70 3730.0 84 2440.0 55 4428. 4634 2495 106 BLACKFOOT NR, ID (1) APR-JUL 3100.0 67 3760.0 82 2440.0 53 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 1600.0 49 2540.0 78 655.0 20 3242. 2929 2752 86 MILNER, ID APR-JUL 220.0 18 660.0 54 130.0 11 1228. 996 544 27 KING HILL, ID (1) APR-JUL 1630.0 54 2510.0 82 745.0 24 3045. 3030 3276 62 MURPHY NR, ID (1) APR-JUL 1680.0 54 2620.0 85 745.0 24 3092. 3104 3419 62 WEISER, ID (1) JAN-JUL 5270.0 54 6840.0 70 3710.0 38 9793. 12140 5209 60 APR-JUL 2980.0 52 4540.0 79 1410.0 24 5765. 8160 5209 60 BROWNLEE RES INFLOW APR-JUL 3280.0 52 5180.0 82 1380.0 22 6313. 8975 5622 60 HELLS CANYON, ID (1) APR-JUL 3340.0 51 5080.0 78 1600.0 25 6493. 9324 5824 61 LOWER GRANITE RES IN, WA (1) JAN-JUL 21000.0 70 25100.0 84 16800.0 56 30020. 32200 14430 77 FEB-SEP 21300.0 70 25500.0 84 17200.0 57 30370. 31790 14430 77 APR-JUL 14600.0 68 18800.0 87 10500.0 49 21550. 24440 14430 77 UPPER SNAKE BASINS Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 270.0 69 320.0 81 220.0 56 394. 401 148 112 SALT RIVER ETNA NR, WY APR-JUL 220.0 64 300.0 88 137.0 40 342. 363 234 94 HENRYS FORK ASHTON NR, ID APR-JUL 405.0 71 520.0 91 285.0 50 571. 659 588 93 ST. ANTHONY, ID APR-JUL 500.0 68 665.0 91 335.0 46 734. 819 794 108 REXBURG NR, ID APR-JUL 1130.0 72 1390.0 89 870.0 56 1559. 1016 1009 84 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 275.0 71 340.0 88 210.0 54 386. 370 172 79 TETON RIVER ST. ANTHONY NR, ID APR-JUL 275.0 68 355.0 88 195.0 48 403. 464 244 112 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 83.0 58 116.0 82 49.0 35 142. 229 77 89 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 33.0 38 62.0 72 4.3 5 86. 94 36 75 PORTNEUF RIVER TOPAZ, ID APR-SEP 54.0 57 66.0 69 42.0 44 95. 120 60 75 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 19.0 66 30.0 103 8.5 29 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 128.0 50 205.0 80 49.0 19 256. 431 96 96 MAGIC RESERVOIR INFLOW, ID APR-JUL 84.0 29 184.0 63 0.0 0 291. 591 112 67 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 30.0 34 55.0 63 5.3 6 87. 163 32 59 MIDDLE SNAKE BASINS Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 125.0 60 205.0 99 46.0 22 208. 276 83 69 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 225.0 37 380.0 62 77.0 13 613. 1050 268 45 OWYHEE RES OUTFLOW APR-JUL 37.0 17 192.0 88 13.4 6 217. 594 44 15 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 420.0 66 530.0 83 315.0 50 636. 828 322 94 BOISE NR, ID (1) APR-JUL 830.0 59 1070.0 76 585.0 41 1414. 2060 749 85 PARMA NR, ID APR-JUL 119.0 20 300.0 51 87.0 15 593. 1102 333 43 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 300.0 55 405.0 75 197.0 36 542. 816 240 91 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 48.0 44 59.0 54 38.0 35 110. 239 61 52 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 40.0 49 47.0 58 32.0 40 81. 155 40 56 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1110.0 69 1430.0 88 780.0 48 1617. 2214 906 92 EMMETT NR, ID APR-JUL 860.0 69 1200.0 96 505.0 41 1246. 1977 736 70 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 99.0 74 123.0 92 75.0 56 134. 180 64 125 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 340.0 69 445.0 90 235.0 47 495. 684 285 93 WEISER RIVER WEISER NR, ID (1) APR-JUL 240.0 61 380.0 97 99.0 25 391. 717 261 50 BURNT RIVER HEREFORD NR, OR MAR-JUL 22.0 43 31.0 61 13.4 26 51. 81 29 57 LOWER SNAKE AND CENTRAL OREGON BASINS Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 35.0 50 49.0 70 21.0 30 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 189.0 63 245.0 81 133.0 44 301. 394 114 75 SALMON RIVER SALMON, ID (1) APR-JUL 620.0 72 910.0 106 330.0 39 857. 1078 595 109 WHITEBIRD, ID (1) JAN-JUL 5100.0 75 6220.0 91 3970.0 58 6805. 7274 2534 99 APR-JUL 4180.0 71 5310.0 91 3050.0 52 5851. 6441 2534 99 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 151.0 61 190.0 76 112.0 45 249. 238 154 72 APR-JUL 97.0 53 136.0 74 58.0 32 184. 202 154 72 TROY, OR (1) MAR-JUL 1120.0 71 1520.0 96 720.0 46 1578. 1573 1033 82 APR-JUL 835.0 66 1240.0 97 435.0 34 1274. 1369 1033 82 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 3780.0 81 4920.0 106 2640.0 57 4645. 4316 2592 101 SPALDING, ID (1) JAN-JUL 8350.0 86 9950.0 103 6750.0 70 9683. 9175 5142 103 APR-JUL 5990.0 81 7590.0 102 4390.0 59 7435. 7274 5142 103 APR-SEP 6350.0 81 7950.0 101 4750.0 61 7849. 7550 5142 103 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3090.0 87 3590.0 101 2590.0 73 3547. 3507 2137 106 APR-JUL 2150.0 81 2650.0 100 1650.0 62 2644. 2676 2137 106 APR-SEP 2280.0 81 2780.0 99 1780.0 64 2803. 2786 2137 106 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 48.0 91 59.0 111 38.0 72 53. 63 91 118 UMATILLA RIVER GIBBON NR, OR APR-JUL 58.0 79 76.0 104 40.0 55 73. 86 127 103 PENDLETON, OR APR-JUL 106.0 71 145.0 97 68.0 46 149. 178 289 97 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 97.0 61 123.0 77 71.0 44 160. 0 APR-JUL 75.0 61 101.0 82 49.0 40 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 395.0 66 535.0 90 250.0 42 597. 745 577 86 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 785.0 68 1090.0 95 485.0 42 1153. 1235 762 74 APR-SEP 520.0 60 820.0 95 220.0 25 865. 1038 762 74 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 485.0 92 515.0 98 455.0 86 528. 497 537 95 Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 118.0 64 151.0 82 86.0 47 184. 316 156 69 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 22.0 61 34.0 94 10.0 28 36. 59 WESTSIDE AND SOUTHERN OREGON BASINS Apr-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6410.0 101 7540.0 118 5280.0 83 6365. 5621 7350 133 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3410.0 106 4220.0 131 2610.0 81 3217. 3453 3946 125 APR-JUL 1680.0 99 2490.0 147 870.0 52 1689. 1642 3946 125 APR-SEP 1910.0 99 2710.0 141 1100.0 57 1922. 1817 3946 125 CASTLE ROCK, WA APR-SEP 2550.0 97 3660.0 139 1440.0 55 2639. 2380 6223 126 JAN-JUL 5020.0 107 6140.0 130 3910.0 83 4709. 5136 6223 126 LEWIS RIVER ARIEL, WA JAN-JUL 2450.0 104 2610.0 111 2280.0 97 2351. 2514 2956 108 MCKENZIE RIVER VIDA NR, OR APR-SEP 1050.0 87 1200.0 100 895.0 75 1201. 1142 2284 106 S. SANTIAM RIVER WATERLOO, OR APR-SEP 500.0 85 670.0 114 325.0 55 587. 540 2042 109 N. SANTIAM RIVER MEHAMA, OR APR-SEP 690.0 83 895.0 107 485.0 58 834. 754 2165 111 WILLAMETTE RIVER SALEM, OR APR-SEP 4060.0 85 5090.0 106 3030.0 63 4804. 4373 14540 102 CLACKAMAS RIVER ESTACADA, OR APR-SEP 680.0 91 785.0 105 570.0 76 748. 678 1762 114 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 125.0 83 146.0 97 104.0 69 151. 156 128 79 JAN-JUL 151.0 83 172.0 95 130.0 72 181. 195 128 79 ROGUE RIVER RAYGOLD, OR APR-SEP 730.0 82 825.0 93 635.0 71 889. 895 1467 91 JAN-JUL 1310.0 83 1400.0 88 1210.0 76 1584. 1970 1467 91 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 57.0 64 79.0 89 34.0 38 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 55.0 43 101.0 78 8.9 7 129. 196 43 40 APR-SEP 43.0 43 89.0 90 0.0 0 99. 167 43 40 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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