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Water Supply Forecasts Northwest River Forecast Center Thursday April 26, 2007 at 22:08 GMT Observed precipitation through the 23th Future precip assumed to be normal Snow included in this run Observed runoff through March note: current month runoff based on OBSERVED + ESP to the end of APR UPPER COLUMBIA BASINS May-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 9630.0 100 9619. 9985 2527 99 FEB-SEP 14700.0 113 16000.0 123 13400.0 103 12960. 12300 2527 99 APR-SEP 14200.0 114 15400.0 123 12900.0 103 12500. 11850 2527 99 REVELSTOKE, BC JAN-JUL 15500.0 112 16600.0 120 14400.0 104 13880. 14190 3525 94 ARROW LAKES INFLOW JAN-JUL 23000.0 110 25000.0 119 21000.0 100 20960. 20790 6267 92 FEB-SEP 29200.0 110 31200.0 118 27200.0 103 26460. 24050 6267 92 APR-SEP 27700.0 110 29700.0 118 25700.0 102 25110. 22920 6267 92 BIRCHBANK, BC (1) JAN-JUL 43100.0 111 47500.0 122 38600.0 99 38930. 41180 13840 110 APR-SEP 47300.0 109 51700.0 119 42800.0 98 43500. 42860 13840 110 GRAND COULEE, WA (1) JAN-JUL 66100.0 105 72800.0 116 59300.0 94 62900. 66890 26800 109 APR-SEP 65700.0 103 72500.0 113 59000.0 92 63990. 63870 26800 109 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 74200.0 108 82000.0 119 66400.0 96 68910. 71930 29870 111 APR-SEP 73300.0 105 81100.0 117 65500.0 94 69540. 68910 29870 111 THE DALLES NR, OR (1) JAN-JUL 100000.0 93 111000.0 103 89100.0 83 107300. 114700 52180 97 APR-AUG 85200.0 92 96100.0 103 74300.0 80 93090. 97540 52180 97 APR-SEP 90300.0 92 101000.0 102 79400.0 80 98650. 101700 52180 97 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 6820.0 108 8020.0 127 5620.0 89 6306. 6909 2427 117 APR-AUG 6600.0 106 7800.0 125 5400.0 86 6248. 6628 2427 117 APR-SEP 7020.0 106 8220.0 124 5820.0 88 6638. 6922 2427 117 LEONIA, ID (1) APR-JUL 7350.0 104 8830.0 125 5870.0 83 7041. 7768 3745 123 APR-SEP 8480.0 104 9960.0 123 7000.0 86 8125. 8545 3745 123 BONNERS FERRY, ID APR-JUL 7760.0 102 9260.0 122 6360.0 83 7619. 8380 4190 125 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 17900.0 112 20100.0 126 15800.0 99 16010. 17210 6695 121 APR-SEP 17800.0 108 20300.0 123 15400.0 94 16450. 16790 6695 121 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1980.0 110 2340.0 130 1620.0 90 1800. 2033 519 106 FEB-SEP 2530.0 110 2890.0 125 2170.0 94 2305. 2361 519 106 APR-SEP 2410.0 108 2770.0 124 2050.0 92 2227. 2291 519 106 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 615.0 87 840.0 119 395.0 56 704. 504 394 90 MISSOULA ABV, MT APR-SEP 1360.0 85 1750.0 110 975.0 61 1595. 1344 823 102 MISSOULA BLO, MT APR-SEP 2440.0 82 3050.0 103 1840.0 62 2962. 2770 1470 109 ST. REGIS, MT (1) APR-SEP 3270.0 84 4170.0 107 2370.0 61 3907. 3648 2029 109 PLAINS NR, MT (1) APR-SEP 9810.0 89 11700.0 106 7910.0 72 11060. 10840 5181 113 WHITEHORSE RAPIDS, ID (1) APR-SEP 11000.0 88 13300.0 107 8730.0 70 12460. 12060 5936 108 BLACKFOOT RIVER BONNER NR, MT APR-SEP 740.0 83 985.0 110 490.0 55 892. 840 430 117 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1090.0 80 1350.0 99 825.0 60 1364. 1319 622 114 May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1730.0 96 2050.0 114 1410.0 78 1801. 1780 882 156 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1560.0 90 1820.0 105 1290.0 74 1740. 1737 788 145 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2060.0 93 2490.0 112 1630.0 73 2224. 2357 916 122 APR-SEP 1820.0 86 2250.0 106 1390.0 65 2124. 2175 916 122 UPPER/MIDDLE COLUMBIA BASINS May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5280.0 91 6310.0 108 4240.0 73 5825. 6002 2533 130 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6130.0 91 7420.0 111 4840.0 72 6713. 7002 3233 134 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 785.0 96 985.0 121 585.0 72 814. 997 706 127 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 12200.0 88 14700.0 106 9740.0 70 13910. 14260 7959 118 APR-JUL 11200.0 88 13700.0 108 8720.0 68 12740. 13520 7959 118 BOX CANYON BLO, WA (1) APR-SEP 12500.0 89 15000.0 106 9900.0 70 14090. 14500 8249 118 KETTLE RIVER LAURIER NR, WA APR-SEP 1920.0 97 2260.0 115 1570.0 80 1972. 2366 566 94 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 655.0 84 815.0 105 490.0 63 778. 871 1060 120 APR-JUL 620.0 84 780.0 106 455.0 62 739. 841 1060 120 COEUR D'ALENE LAKE IN, ID APR-JUL 2110.0 83 2640.0 103 1580.0 62 2552. 2456 2887 102 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2360.0 86 2440.0 89 2290.0 83 2744. 2705 3232 113 ST JOE RIVER CALDER, ID APR-SEP 1030.0 85 1220.0 101 845.0 70 1205. 1263 979 121 APR-JUL 975.0 86 1160.0 102 790.0 70 1136. 1203 979 121 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1960.0 111 2470.0 140 1440.0 82 1766. 1470 1044 157 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1580.0 117 1920.0 142 1250.0 93 1350. 1079 877 221 APR-SEP 1700.0 117 2040.0 141 1370.0 94 1450. 1122 877 221 METHOW RIVER PATEROS NR, WA (1) APR-SEP 1130.0 115 1350.0 137 900.0 91 985. 1144 496 176 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1270.0 107 1410.0 119 1120.0 95 1185. 1345 765 165 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1720.0 105 2230.0 136 1200.0 73 1635. 1669 1224 142 YAKIMA AND MAINSTEM SNAKE BASINS May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 130.0 98 157.0 118 104.0 78 133. 137 175 117 CLE ELUM, WA APR-SEP 895.0 99 1010.0 112 785.0 87 903. 906 1070 130 PARKER NR, WA APR-SEP 1930.0 101 2160.0 113 1710.0 89 1918. 2346 2678 140 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 118.0 98 136.0 113 101.0 84 120. 122 167 129 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 445.0 99 495.0 110 395.0 88 448. 475 434 139 NACHES RIVER NACHES NR, WA APR-SEP 790.0 94 905.0 108 675.0 81 837. 1086 1026 162 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 136.0 101 159.0 119 113.0 84 134. 154 148 154 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 240.0 99 275.0 114 205.0 85 242. 244 254 141 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 650.0 72 775.0 86 520.0 58 904. 861 255 95 APR-JUL 585.0 72 715.0 88 460.0 56 815. 812 255 95 PALISADES RES INFLOW, ID (1) APR-JUL 2210.0 66 2670.0 80 1750.0 53 3331. 3267 1341 93 HEISE NR, ID APR-JUL 2350.0 66 2860.0 80 1850.0 52 3561. 3618 1577 95 SHELLEY NR, ID (1) APR-JUL 3060.0 69 3710.0 84 2420.0 55 4428. 4634 2513 106 BLACKFOOT NR, ID (1) APR-JUL 3080.0 67 3740.0 81 2420.0 53 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 1580.0 49 2520.0 78 630.0 19 3242. 2929 2777 87 MILNER, ID APR-JUL 215.0 18 645.0 53 130.0 11 1228. 996 537 26 KING HILL, ID (1) APR-JUL 1640.0 54 2520.0 83 750.0 25 3045. 3030 3253 62 MURPHY NR, ID (1) APR-JUL 1690.0 55 2630.0 85 760.0 25 3092. 3104 3393 62 WEISER, ID (1) JAN-JUL 5200.0 53 6770.0 69 3640.0 37 9793. 12140 5156 59 APR-JUL 2910.0 50 4470.0 78 1340.0 23 5765. 8160 5156 59 BROWNLEE RES INFLOW APR-JUL 3170.0 50 5070.0 80 1270.0 20 6313. 8975 5540 59 HELLS CANYON, ID (1) APR-JUL 3250.0 50 4990.0 77 1510.0 23 6493. 9324 5719 60 LOWER GRANITE RES IN, WA (1) JAN-JUL 21000.0 70 25100.0 84 16800.0 56 30020. 32200 14350 77 FEB-SEP 21300.0 70 25500.0 84 17200.0 57 30370. 31790 14350 77 APR-JUL 14600.0 68 18800.0 87 10500.0 49 21550. 24440 14350 77 UPPER SNAKE BASINS May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 265.0 67 315.0 80 215.0 55 394. 401 149 113 SALT RIVER ETNA NR, WY APR-JUL 215.0 63 295.0 86 133.0 39 342. 363 232 93 HENRYS FORK ASHTON NR, ID APR-JUL 415.0 73 535.0 94 300.0 53 571. 659 613 97 ST. ANTHONY, ID APR-JUL 520.0 71 685.0 93 360.0 49 734. 819 811 110 REXBURG NR, ID APR-JUL 1160.0 74 1420.0 91 905.0 58 1559. 1016 1021 85 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 275.0 71 340.0 88 210.0 54 386. 370 179 82 TETON RIVER ST. ANTHONY NR, ID APR-JUL 295.0 73 375.0 93 215.0 53 403. 464 249 114 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 86.0 61 119.0 84 53.0 37 142. 229 76 88 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 36.0 42 65.0 76 7.0 8 86. 94 34 71 PORTNEUF RIVER TOPAZ, ID APR-SEP 55.0 58 67.0 71 43.0 45 95. 120 61 77 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 19.5 67 30.0 103 9.0 31 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 133.0 52 210.0 82 54.0 21 256. 431 96 96 MAGIC RESERVOIR INFLOW, ID APR-JUL 92.0 32 192.0 66 0.0 0 291. 591 113 68 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 34.0 39 59.0 68 8.8 10 87. 163 30 55 MIDDLE SNAKE BASINS May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 128.0 62 205.0 99 49.0 24 208. 276 79 66 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 215.0 35 365.0 60 63.0 10 613. 1050 257 43 OWYHEE RES OUTFLOW APR-JUL 30.0 14 177.0 82 11.8 5 217. 594 44 15 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 425.0 67 530.0 83 315.0 50 636. 828 313 92 BOISE NR, ID (1) APR-JUL 830.0 59 1070.0 76 585.0 41 1414. 2060 726 82 PARMA NR, ID APR-JUL 119.0 20 300.0 51 87.0 15 593. 1102 330 42 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 295.0 54 400.0 74 194.0 36 542. 816 238 90 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 45.0 41 56.0 51 35.0 32 110. 239 62 53 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 32.0 40 40.0 49 25.0 31 81. 155 38 53 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1080.0 67 1410.0 87 755.0 47 1617. 2214 897 91 EMMETT NR, ID APR-JUL 825.0 66 1180.0 95 475.0 38 1246. 1977 708 67 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 99.0 74 123.0 92 75.0 56 134. 180 62 122 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 335.0 68 440.0 89 230.0 46 495. 684 285 93 WEISER RIVER WEISER NR, ID (1) APR-JUL 176.0 45 315.0 81 36.0 9 391. 717 257 49 BURNT RIVER HEREFORD NR, OR MAR-JUL 22.0 43 31.0 61 13.4 26 51. 81 28 55 LOWER SNAKE AND CENTRAL OREGON BASINS May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 33.0 47 47.0 67 18.6 27 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 185.0 61 240.0 80 129.0 43 301. 394 116 77 SALMON RIVER SALMON, ID (1) APR-JUL 625.0 73 915.0 107 340.0 40 857. 1078 589 108 WHITEBIRD, ID (1) JAN-JUL 5230.0 77 6360.0 93 4110.0 60 6805. 7274 2552 99 APR-JUL 4310.0 74 5440.0 93 3190.0 55 5851. 6441 2552 99 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 151.0 61 190.0 76 112.0 45 249. 238 155 73 APR-JUL 97.0 53 136.0 74 58.0 32 184. 202 155 73 TROY, OR (1) MAR-JUL 1110.0 70 1510.0 96 710.0 45 1578. 1573 1033 82 APR-JUL 825.0 65 1230.0 97 425.0 33 1274. 1369 1033 82 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 3720.0 80 4860.0 105 2580.0 56 4645. 4316 2615 102 SPALDING, ID (1) JAN-JUL 8250.0 85 9850.0 102 6650.0 69 9683. 9175 5165 104 APR-JUL 5890.0 79 7490.0 101 4290.0 58 7435. 7274 5165 104 APR-SEP 6240.0 80 7840.0 100 4640.0 59 7849. 7550 5165 104 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3050.0 86 3550.0 100 2550.0 72 3547. 3507 2146 106 APR-JUL 2110.0 80 2610.0 99 1610.0 61 2644. 2676 2146 106 APR-SEP 2240.0 80 2740.0 98 1740.0 62 2803. 2786 2146 106 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 48.0 91 58.0 109 37.0 70 53. 63 92 119 UMATILLA RIVER GIBBON NR, OR APR-JUL 60.0 82 78.0 107 42.0 58 73. 86 128 104 PENDLETON, OR APR-JUL 109.0 73 147.0 99 70.0 47 149. 178 290 97 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 95.0 59 121.0 76 69.0 43 160. 0 APR-JUL 73.0 59 99.0 80 47.0 38 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 385.0 64 525.0 88 240.0 40 597. 745 594 88 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 770.0 67 1070.0 93 470.0 41 1153. 1235 785 77 APR-SEP 505.0 58 805.0 93 205.0 24 865. 1038 785 77 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 485.0 92 515.0 98 455.0 86 528. 497 531 94 May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 113.0 61 145.0 79 80.0 43 184. 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 May-07 EarlyBird ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6340.0 100 7480.0 118 5210.0 82 6365. 5621 7327 132 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3400.0 106 4210.0 131 2600.0 81 3217. 3453 3902 123 APR-JUL 1670.0 99 2480.0 147 865.0 51 1689. 1642 3902 123 APR-SEP 1900.0 99 2700.0 140 1090.0 57 1922. 1817 3902 123 CASTLE ROCK, WA APR-SEP 2530.0 96 3640.0 138 1420.0 54 2639. 2380 6147 125 JAN-JUL 5000.0 106 6120.0 130 3890.0 83 4709. 5136 6147 125 LEWIS RIVER ARIEL, WA JAN-JUL 2430.0 103 2590.0 110 2270.0 97 2351. 2514 2938 107 MCKENZIE RIVER VIDA NR, OR APR-SEP 1020.0 85 1180.0 98 865.0 72 1201. 1142 2288 106 S. SANTIAM RIVER WATERLOO, OR APR-SEP 485.0 83 655.0 112 310.0 53 587. 540 2033 108 N. SANTIAM RIVER MEHAMA, OR APR-SEP 670.0 80 875.0 105 465.0 56 834. 754 2165 111 WILLAMETTE RIVER SALEM, OR APR-SEP 3950.0 82 4980.0 104 2920.0 61 4804. 4373 14580 102 CLACKAMAS RIVER ESTACADA, OR APR-SEP 655.0 88 765.0 102 545.0 73 748. 678 1751 113 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 121.0 80 143.0 95 100.0 66 151. 156 124 76 JAN-JUL 148.0 82 169.0 93 127.0 70 181. 195 124 76 ROGUE RIVER RAYGOLD, OR APR-SEP 755.0 85 850.0 96 660.0 74 889. 895 1492 92 JAN-JUL 1340.0 85 1430.0 90 1240.0 78 1584. 1970 1492 92 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 57.0 64 80.0 90 35.0 39 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 56.0 43 102.0 79 10.5 8 129. 196 44 41 APR-SEP 44.0 44 90.0 91 0.0 0 99. 167 44 41 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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