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Water Supply Forecasts Northwest River Forecast Center Thursday March 29, 2007 at 21:54 GMT Observed precipitation through the 26th Future precip is 90% of normal for the first half of APR in the Snake Basin and 100% of normal for the rest of the period and the other areas Snow included in this run Observed runoff through March note: current month runoff based on OBSERVED + ESP to the end of MAR UPPER COLUMBIA BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 10900.0 113 12200.0 127 9590.0 100 9619. 9985 1889 93 FEB-SEP 14700.0 113 16100.0 124 13400.0 103 12960. 12300 1889 93 APR-SEP 14100.0 113 15500.0 124 12800.0 102 12500. 11850 1889 93 REVELSTOKE, BC JAN-JUL 15600.0 112 16700.0 120 14500.0 104 13880. 14190 2552 87 ARROW LAKES INFLOW JAN-JUL 23200.0 111 25300.0 121 21100.0 101 20960. 20790 4583 87 FEB-SEP 29500.0 111 31600.0 119 27500.0 104 26460. 24050 4583 87 APR-SEP 28000.0 112 30000.0 119 25900.0 103 25110. 22920 4583 87 BIRCHBANK, BC (1) JAN-JUL 43200.0 111 48400.0 124 37900.0 97 38930. 41180 9996 108 APR-SEP 47300.0 109 52500.0 121 42000.0 97 43500. 42860 9996 108 GRAND COULEE, WA (1) JAN-JUL 66700.0 106 75200.0 120 58100.0 92 62900. 66890 19260 111 APR-SEP 66300.0 104 74900.0 117 57800.0 90 63990. 63870 19260 111 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 74900.0 109 84300.0 122 65400.0 95 68910. 71930 21460 114 APR-SEP 73900.0 106 83400.0 120 64500.0 93 69540. 68910 21460 114 THE DALLES NR, OR (1) JAN-JUL 102000.0 95 115000.0 107 88100.0 82 107300. 114700 39570 100 APR-AUG 86800.0 93 100000.0 107 73200.0 79 93090. 97540 39570 100 APR-SEP 92100.0 93 106000.0 107 78500.0 80 98650. 101700 39570 100 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 6810.0 108 8110.0 129 5510.0 87 6306. 6909 1774 114 APR-AUG 6580.0 105 7880.0 126 5280.0 85 6248. 6628 1774 114 APR-SEP 7000.0 105 8300.0 125 5700.0 86 6638. 6922 1774 114 LEONIA, ID (1) APR-JUL 7210.0 102 8790.0 125 5630.0 80 7041. 7768 2758 128 APR-SEP 8320.0 102 9900.0 122 6740.0 83 8125. 8545 2758 128 BONNERS FERRY, ID APR-JUL 7630.0 100 9140.0 120 6110.0 80 7619. 8380 3074 132 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 17800.0 111 20200.0 126 15500.0 97 16010. 17210 4925 126 APR-SEP 17600.0 107 20300.0 123 14900.0 91 16450. 16790 4925 126 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1970.0 109 2340.0 130 1590.0 88 1800. 2033 394 104 FEB-SEP 2510.0 109 2890.0 125 2140.0 93 2305. 2361 394 104 APR-SEP 2390.0 107 2760.0 124 2010.0 90 2227. 2291 394 104 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 595.0 85 930.0 132 265.0 38 704. 504 329 96 MISSOULA ABV, MT APR-SEP 1390.0 87 1850.0 116 930.0 58 1595. 1344 641 110 MISSOULA BLO, MT APR-SEP 2530.0 85 3230.0 109 1840.0 62 2962. 2770 1148 118 ST. REGIS, MT (1) APR-SEP 3360.0 86 4430.0 113 2290.0 59 3907. 3648 1546 117 PLAINS NR, MT (1) APR-SEP 9790.0 89 12100.0 109 7510.0 68 11060. 10840 3851 123 WHITEHORSE RAPIDS, ID (1) APR-SEP 11000.0 88 13600.0 109 8310.0 67 12460. 12060 4443 118 BLACKFOOT RIVER BONNER NR, MT APR-SEP 700.0 78 985.0 110 410.0 46 892. 840 314 131 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1150.0 84 1440.0 106 865.0 63 1364. 1319 490 126 Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1660.0 92 2020.0 112 1310.0 73 1801. 1780 621 172 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1510.0 87 1800.0 103 1220.0 70 1740. 1737 589 169 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2020.0 91 2470.0 111 1580.0 71 2224. 2357 654 142 APR-SEP 1780.0 84 2230.0 105 1340.0 63 2124. 2175 654 142 UPPER/MIDDLE COLUMBIA BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5120.0 88 6390.0 110 3850.0 66 5825. 6002 1823 149 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6070.0 90 7450.0 111 4690.0 70 6713. 7002 2358 152 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 770.0 95 990.0 122 550.0 68 814. 997 439 122 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 12500.0 90 15400.0 111 9640.0 69 13910. 14260 5879 128 APR-JUL 11400.0 89 14300.0 112 8510.0 67 12740. 13520 5879 128 BOX CANYON BLO, WA (1) APR-SEP 12800.0 91 15800.0 112 9800.0 70 14090. 14500 6111 128 KETTLE RIVER LAURIER NR, WA APR-SEP 2050.0 104 2420.0 123 1680.0 85 1972. 2366 218 80 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 640.0 82 840.0 108 445.0 57 778. 871 823 141 APR-JUL 610.0 83 805.0 109 415.0 56 739. 841 823 141 COEUR D'ALENE LAKE IN, ID APR-JUL 2160.0 85 2790.0 109 1520.0 60 2552. 2456 2310 119 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2460.0 90 2540.0 93 2380.0 87 2744. 2705 2459 123 ST JOE RIVER CALDER, ID APR-SEP 1030.0 85 1260.0 105 800.0 66 1205. 1263 708 138 APR-JUL 975.0 86 1200.0 106 740.0 65 1136. 1203 708 138 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 2140.0 121 2700.0 153 1580.0 89 1766. 1470 700 144 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1750.0 130 2110.0 156 1380.0 102 1350. 1079 565 208 APR-SEP 1880.0 130 2240.0 154 1510.0 104 1450. 1122 565 208 METHOW RIVER PATEROS NR, WA (1) APR-SEP 1040.0 106 1290.0 131 795.0 81 985. 1144 293 164 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1290.0 109 1470.0 124 1120.0 95 1185. 1345 568 173 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1740.0 106 2280.0 139 1210.0 74 1635. 1669 939 148 YAKIMA AND MAINSTEM SNAKE BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 134.0 101 160.0 120 108.0 81 133. 137 147 122 CLE ELUM, WA APR-SEP 915.0 101 1020.0 113 815.0 90 903. 906 874 138 PARKER NR, WA APR-SEP 1790.0 93 2010.0 105 1570.0 82 1918. 2346 2199 147 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 118.0 98 138.0 115 99.0 83 120. 122 138 136 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 455.0 102 510.0 114 400.0 89 448. 475 350 147 NACHES RIVER NACHES NR, WA APR-SEP 795.0 95 890.0 106 700.0 84 837. 1086 848 179 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 130.0 97 148.0 110 113.0 84 134. 154 127 166 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 240.0 99 270.0 112 210.0 87 242. 244 214 148 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 44.0 96 61.0 133 27.0 59 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-SEP 665.0 74 805.0 89 525.0 58 904. 861 198 95 APR-JUL 600.0 74 740.0 91 460.0 56 815. 812 198 95 PALISADES RES INFLOW, ID (1) APR-JUL 2240.0 67 2780.0 83 1700.0 51 3331. 3267 1069 97 HEISE NR, ID APR-JUL 2380.0 67 2990.0 84 1780.0 50 3561. 3618 1264 100 SHELLEY NR, ID (1) APR-JUL 3130.0 71 3870.0 87 2400.0 54 4428. 4634 2070 111 BLACKFOOT NR, ID (1) APR-JUL 3150.0 68 3910.0 85 2390.0 52 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 1600.0 49 2660.0 82 535.0 17 3242. 2929 2369 91 MILNER, ID APR-JUL 135.0 11 198.0 16 135.0 11 1228. 996 523 32 KING HILL, ID (1) APR-JUL 1590.0 52 2540.0 83 630.0 21 3045. 3030 2864 66 MURPHY NR, ID (1) APR-JUL 1660.0 54 2660.0 86 665.0 22 3092. 3104 3013 66 WEISER, ID (1) JAN-JUL 5370.0 55 7120.0 73 3630.0 37 9793. 12140 4473 64 APR-JUL 3030.0 53 4780.0 83 1280.0 22 5765. 8160 4473 64 BROWNLEE RES INFLOW APR-JUL 3360.0 53 5520.0 87 1200.0 19 6313. 8975 4808 64 HELLS CANYON, ID (1) APR-JUL 3430.0 53 5370.0 83 1480.0 23 6493. 9324 4943 66 LOWER GRANITE RES IN, WA (1) JAN-JUL 22000.0 73 26900.0 90 17100.0 57 30020. 32200 11370 83 FEB-SEP 22400.0 74 27400.0 90 17500.0 58 30370. 31790 11370 83 APR-JUL 15500.0 72 20400.0 95 10500.0 49 21550. 24440 11370 83 UPPER SNAKE BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 265.0 67 335.0 85 195.0 49 394. 401 112 122 SALT RIVER ETNA NR, WY APR-JUL 210.0 61 310.0 91 109.0 32 342. 363 187 99 HENRYS FORK ASHTON NR, ID APR-JUL 435.0 76 555.0 97 315.0 55 571. 659 499 98 ST. ANTHONY, ID APR-JUL 545.0 74 760.0 104 325.0 44 734. 819 673 112 REXBURG NR, ID APR-JUL 1200.0 77 1540.0 99 855.0 55 1559. 1016 869 89 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 295.0 76 365.0 95 230.0 60 386. 370 152 89 TETON RIVER ST. ANTHONY NR, ID APR-JUL 285.0 71 400.0 99 166.0 41 403. 464 207 119 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 94.0 66 151.0 106 37.0 26 142. 229 66 89 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 45.0 52 76.0 88 13.3 15 86. 94 27 114 PORTNEUF RIVER TOPAZ, ID APR-SEP 60.0 63 82.0 86 39.0 41 95. 120 51 82 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 19.3 67 33.0 114 5.7 20 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 150.0 59 235.0 92 64.0 25 256. 431 75 108 MAGIC RESERVOIR INFLOW, ID APR-JUL 130.0 45 245.0 84 13.2 5 291. 591 102 127 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 48.0 55 77.0 89 18.0 21 87. 163 28 94 MIDDLE SNAKE BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 131.0 63 230.0 111 32.0 15 208. 276 56 76 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 290.0 47 500.0 82 82.0 13 613. 1050 219 51 OWYHEE RES OUTFLOW APR-JUL 21.0 10 160.0 74 4.1 2 217. 594 29 17 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 440.0 69 560.0 88 325.0 51 636. 828 228 106 BOISE NR, ID (1) APR-JUL 935.0 66 1230.0 87 640.0 45 1414. 2060 530 96 PARMA NR, ID APR-JUL 104.0 18 250.0 42 65.0 11 593. 1102 292 49 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 360.0 66 465.0 86 255.0 47 542. 816 164 109 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 55.0 50 90.0 82 20.0 18 110. 239 52 66 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 45.0 56 62.0 77 29.0 36 81. 155 33 68 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1220.0 75 1590.0 98 845.0 52 1617. 2214 650 100 EMMETT NR, ID APR-JUL 905.0 73 1310.0 105 500.0 40 1246. 1977 546 72 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 103.0 77 128.0 96 78.0 58 134. 180 39 116 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 375.0 76 490.0 99 260.0 53 495. 684 209 100 WEISER RIVER WEISER NR, ID (1) APR-JUL 280.0 72 455.0 116 107.0 27 391. 717 207 53 BURNT RIVER HEREFORD NR, OR MAR-JUL 28.0 55 42.0 82 13.5 26 51. 81 22 69 LOWER SNAKE AND CENTRAL OREGON BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 40.0 57 54.0 77 25.0 36 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 199.0 66 275.0 91 121.0 40 301. 394 84 88 SALMON RIVER SALMON, ID (1) APR-JUL 680.0 79 990.0 116 370.0 43 857. 1078 472 106 WHITEBIRD, ID (1) JAN-JUL 5520.0 81 6910.0 102 4130.0 61 6805. 7274 1912 103 APR-JUL 4570.0 78 5960.0 102 3180.0 54 5851. 6441 1912 103 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 161.0 65 220.0 88 100.0 40 249. 238 116 84 APR-JUL 107.0 58 168.0 91 46.0 25 184. 202 116 84 TROY, OR (1) MAR-JUL 1180.0 75 1580.0 100 770.0 49 1578. 1573 825 92 APR-JUL 875.0 69 1280.0 100 470.0 37 1274. 1369 825 92 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 3950.0 85 5220.0 112 2680.0 58 4645. 4316 1900 115 SPALDING, ID (1) JAN-JUL 8720.0 90 10500.0 108 6940.0 72 9683. 9175 3877 117 APR-JUL 6290.0 85 8070.0 109 4510.0 61 7435. 7274 3877 117 APR-SEP 6660.0 85 8440.0 108 4880.0 62 7849. 7550 3877 117 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3210.0 90 3830.0 108 2590.0 73 3547. 3507 1627 120 APR-JUL 2230.0 84 2850.0 108 1610.0 61 2644. 2676 1627 120 APR-SEP 2370.0 85 2990.0 107 1750.0 62 2803. 2786 1627 120 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 47.0 89 58.0 109 35.0 66 53. 63 77 125 UMATILLA RIVER GIBBON NR, OR APR-JUL 63.0 86 88.0 121 37.0 51 73. 86 107 116 PENDLETON, OR APR-JUL 113.0 76 179.0 120 47.0 32 149. 178 252 111 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 106.0 66 150.0 94 61.0 38 160. 0 APR-JUL 82.0 67 126.0 102 37.0 30 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 400.0 67 610.0 102 194.0 32 597. 745 447 99 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 815.0 71 1160.0 101 470.0 41 1153. 1235 579 82 APR-SEP 545.0 63 890.0 103 195.0 23 865. 1038 579 82 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 480.0 91 515.0 98 445.0 84 528. 497 454 93 Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 111.0 60 169.0 92 52.0 28 184. 316 125 77 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 21.0 58 36.0 100 6.3 18 36. 59 WESTSIDE AND SOUTHERN OREGON BASINS Apr-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6480.0 102 7730.0 121 5240.0 82 6365. 5621 6278 133 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3380.0 105 4250.0 132 2510.0 78 3217. 3453 3326 122 APR-JUL 1780.0 105 2650.0 157 915.0 54 1689. 1642 3326 122 APR-SEP 2030.0 106 2900.0 151 1160.0 60 1922. 1817 3326 122 CASTLE ROCK, WA APR-SEP 2710.0 103 3920.0 149 1510.0 57 2639. 2380 5358 126 JAN-JUL 4990.0 106 6190.0 131 3780.0 80 4709. 5136 5358 126 LEWIS RIVER ARIEL, WA JAN-JUL 2310.0 98 2670.0 114 1940.0 83 2351. 2514 2578 109 MCKENZIE RIVER VIDA NR, OR APR-SEP 1150.0 96 1410.0 117 885.0 74 1201. 1142 2015 110 S. SANTIAM RIVER WATERLOO, OR APR-SEP 545.0 93 795.0 135 295.0 50 587. 540 1864 114 N. SANTIAM RIVER MEHAMA, OR APR-SEP 770.0 92 1010.0 121 535.0 64 834. 754 1953 115 WILLAMETTE RIVER SALEM, OR APR-SEP 4330.0 90 5870.0 122 2790.0 58 4804. 4373 13210 105 CLACKAMAS RIVER ESTACADA, OR APR-SEP 705.0 94 865.0 116 545.0 73 748. 678 1574 119 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 136.0 90 174.0 115 99.0 66 151. 156 101 74 JAN-JUL 148.0 82 185.0 102 111.0 61 181. 195 101 74 ROGUE RIVER RAYGOLD, OR APR-SEP 815.0 92 945.0 106 685.0 77 889. 895 1301 95 JAN-JUL 1420.0 90 1550.0 98 1290.0 81 1584. 1970 1301 95 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 53.0 60 89.0 100 16.9 19 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 71.0 55 135.0 105 7.2 6 129. 196 32 53 APR-SEP 58.0 59 122.0 123 0.0 0 99. 167 32 53 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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