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Water Supply Forecasts Northwest River Forecast Center Wednesday May 07, 2008 at 22:45 GMT Full month of observed precipitation Future precip 90% of normal for the first half of May Future precip 100% of normal for the rest of the period Snow included in this run Full complement runoff applied through APR UPPER COLUMBIA BASINS May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 9900.0 103 11200.0 116 8610.0 90 9619. 9985 2358 93 FEB-SEP 13300.0 103 14600.0 113 12000.0 93 12960. 12300 2358 93 APR-SEP 12900.0 103 14200.0 114 11600.0 93 12500. 11850 2358 93 REVELSTOKE, BC JAN-JUL 14000.0 101 15100.0 109 13000.0 94 13880. 14190 3444 92 ARROW LAKES INFLOW JAN-JUL 20600.0 98 22600.0 108 18600.0 89 20960. 20790 5094 75 FEB-SEP 26100.0 99 28100.0 106 24100.0 91 26460. 24050 5094 75 APR-SEP 25200.0 100 27200.0 108 23200.0 92 25110. 22920 5094 75 BIRCHBANK, BC (1) JAN-JUL 37400.0 96 41900.0 108 33000.0 85 38930. 41180 9640 76 APR-SEP 42600.0 98 47100.0 108 38200.0 88 43500. 42860 9640 76 GRAND COULEE, WA (1) JAN-JUL 59800.0 95 66500.0 106 53000.0 84 62900. 66890 16610 67 APR-SEP 63500.0 99 70200.0 110 56700.0 89 63990. 63870 16610 67 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 66000.0 96 73800.0 107 58200.0 84 68910. 71930 17430 65 APR-SEP 69900.0 101 77700.0 112 62100.0 89 69540. 68910 17430 65 THE DALLES NR, OR (1) JAN-JUL 97300.0 91 108000.0 101 86400.0 81 107300. 114700 35170 66 APR-AUG 90900.0 98 102000.0 110 80000.0 86 93090. 97540 35170 66 APR-SEP 96300.0 98 107000.0 108 85400.0 87 98650. 101700 35170 66 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5820.0 92 7020.0 111 4620.0 73 6306. 6909 1381 66 APR-AUG 5920.0 95 7120.0 114 4720.0 76 6248. 6628 1381 66 APR-SEP 6280.0 95 7480.0 113 5080.0 77 6638. 6922 1381 66 LEONIA, ID (1) APR-JUL 6960.0 99 8440.0 120 5480.0 78 7041. 7768 1925 63 APR-SEP 8030.0 99 9510.0 117 6550.0 81 8125. 8545 1925 63 BONNERS FERRY, ID APR-JUL 7610.0 100 9140.0 120 6160.0 81 7619. 8380 2082 62 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 14900.0 93 17000.0 106 12800.0 80 16010. 17210 3608 65 APR-SEP 15800.0 96 18300.0 111 13400.0 81 16450. 16790 3608 65 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1740.0 97 2100.0 117 1380.0 77 1800. 2033 404 82 FEB-SEP 2230.0 97 2590.0 112 1870.0 81 2305. 2361 404 82 APR-SEP 2170.0 97 2530.0 114 1810.0 81 2227. 2291 404 82 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 770.0 109 990.0 141 550.0 78 704. 504 319 73 MISSOULA ABV, MT APR-SEP 1640.0 103 2020.0 127 1250.0 78 1595. 1344 549 68 MISSOULA BLO, MT APR-SEP 3100.0 105 3710.0 125 2500.0 84 2962. 2770 939 69 ST. REGIS, MT (1) APR-SEP 4130.0 106 5030.0 129 3230.0 83 3907. 3648 1280 69 PLAINS NR, MT (1) APR-SEP 11000.0 99 12900.0 117 9120.0 82 11060. 10840 2669 58 WHITEHORSE RAPIDS, ID (1) APR-SEP 12700.0 102 15000.0 120 10400.0 83 12460. 12060 2885 53 BLACKFOOT RIVER BONNER NR, MT APR-SEP 850.0 95 1100.0 123 605.0 68 892. 840 230 63 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1460.0 107 1720.0 126 1200.0 88 1364. 1319 397 73 May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1770.0 98 2080.0 115 1450.0 81 1801. 1780 306 54 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1680.0 97 1950.0 112 1420.0 82 1740. 1737 303 56 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2030.0 91 2460.0 111 1600.0 72 2224. 2357 427 57 APR-SEP 2010.0 95 2440.0 115 1580.0 74 2124. 2175 427 57 UPPER/MIDDLE COLUMBIA BASINS May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5600.0 96 6640.0 114 4560.0 78 5825. 6002 1027 53 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6520.0 97 7810.0 116 5230.0 78 6713. 7002 1462 60 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 925.0 114 1120.0 138 725.0 89 814. 997 336 60 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 14200.0 102 16700.0 120 11700.0 84 13910. 14260 4154 62 APR-JUL 13000.0 102 15500.0 122 10500.0 82 12740. 13520 4154 62 BOX CANYON BLO, WA (1) APR-SEP 14400.0 102 17000.0 121 11900.0 84 14090. 14500 4261 61 KETTLE RIVER LAURIER NR, WA APR-SEP 1800.0 91 2150.0 109 1450.0 74 1972. 2366 213 35 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 915.0 118 1080.0 139 755.0 97 778. 871 443 50 APR-JUL 870.0 118 1030.0 139 710.0 96 739. 841 443 50 COEUR D'ALENE LAKE IN, ID APR-JUL 3010.0 118 3540.0 139 2480.0 97 2552. 2456 1645 58 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 3360.0 122 3440.0 125 3290.0 120 2744. 2705 1678 58 ST JOE RIVER CALDER, ID APR-SEP 1370.0 114 1560.0 129 1190.0 99 1205. 1263 364 45 APR-JUL 1300.0 114 1490.0 131 1120.0 99 1136. 1203 364 45 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1570.0 89 2080.0 118 1050.0 59 1766. 1470 430 65 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1160.0 86 1500.0 111 830.0 61 1350. 1079 279 70 APR-SEP 1250.0 86 1590.0 110 920.0 63 1450. 1122 279 70 METHOW RIVER PATEROS NR, WA (1) APR-SEP 835.0 85 1060.0 108 605.0 61 985. 1144 206 73 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1120.0 95 1260.0 106 975.0 82 1185. 1345 324 70 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1680.0 103 2190.0 134 1160.0 71 1635. 1669 500 58 YAKIMA AND MAINSTEM SNAKE BASINS May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 159.0 120 186.0 140 132.0 99 133. 137 89 59 CLE ELUM, WA APR-SEP 1040.0 115 1150.0 127 925.0 102 903. 906 458 56 PARKER NR, WA APR-SEP 2160.0 113 2390.0 125 1940.0 101 1918. 2346 1175 61 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 143.0 119 161.0 134 125.0 104 120. 122 79 61 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 535.0 119 585.0 131 485.0 108 448. 475 190 61 NACHES RIVER NACHES NR, WA APR-SEP 880.0 105 995.0 119 765.0 91 837. 1086 438 69 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 140.0 104 163.0 122 117.0 87 134. 154 66 69 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 255.0 105 285.0 118 220.0 91 242. 244 121 67 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 47.0 102 63.0 137 31.0 67 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 880.0 108 1010.0 124 755.0 93 815. 812 241 89 APR-SEP 975.0 108 1100.0 122 850.0 94 904. 861 241 89 PALISADES RES INFLOW, ID (1) APR-JUL 3290.0 99 3750.0 113 2830.0 85 3331. 3267 1094 75 APR-SEP 3830.0 99 4290.0 111 3370.0 87 3875. 3672 1094 75 HEISE NR, ID APR-JUL 3510.0 99 4010.0 113 3000.0 84 3561. 3618 1238 75 APR-SEP 4100.0 99 4600.0 111 3590.0 86 4159. 4188 1238 75 SHELLEY NR, ID (1) APR-JUL 4620.0 104 5270.0 119 3980.0 90 4428. 4634 1921 81 APR-SEP 5560.0 104 6200.0 116 4910.0 92 5324. 5339 1921 81 BLACKFOOT NR, ID (1) APR-JUL 4650.0 101 5310.0 115 3990.0 87 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 3200.0 99 4150.0 128 2260.0 70 3242. 2929 2274 71 MILNER, ID APR-JUL 290.0 24 1050.0 86 174.0 14 1228. 996 189 9 KING HILL, ID (1) APR-JUL 1910.0 63 2790.0 92 1030.0 34 3045. 3030 2979 57 MURPHY NR, ID (1) APR-JUL 2010.0 65 2950.0 95 1080.0 35 3092. 3104 3009 55 WEISER, ID (1) JAN-JUL 6310.0 64 7880.0 80 4740.0 48 9793. 12140 4808 55 APR-JUL 4270.0 74 5840.0 101 2710.0 47 5765. 8160 4808 55 APR-SEP 5690.0 79 7260.0 101 4120.0 57 7192. 9471 4808 55 BROWNLEE RES INFLOW APR-JUL 4860.0 77 6760.0 107 2960.0 47 6313. 8975 5268 56 APR-SEP 6150.0 79 8050.0 103 4250.0 54 7801. 10350 5268 56 HELLS CANYON, ID (1) APR-JUL 5000.0 77 6740.0 104 3260.0 50 6493. 9324 5472 58 APR-SEP 6450.0 81 8190.0 103 4710.0 59 7977. 10740 5472 58 LOWER GRANITE RES IN, WA (1) JAN-JUL 26500.0 88 30700.0 102 22400.0 75 30020. 32200 11380 61 FEB-SEP 27600.0 91 31800.0 105 23500.0 77 30370. 31790 11380 61 APR-JUL 21800.0 101 26000.0 121 17700.0 82 21550. 24440 11380 61 APR-SEP 24100.0 100 28300.0 117 20000.0 83 24140. 26590 11380 61 UPPER SNAKE BASINS May-08 Final ________________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. 401 142 107 SALT RIVER ETNA NR, WY APR-JUL 330.0 96 415.0 121 250.0 73 342. 363 175 70 HENRYS FORK ASHTON NR, ID APR-JUL 560.0 98 680.0 119 445.0 78 571. 659 487 77 ST. ANTHONY, ID APR-JUL 740.0 101 900.0 123 580.0 79 734. 819 557 75 REXBURG NR, ID APR-JUL 1530.0 98 1780.0 114 1270.0 81 1559. 1016 792 66 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 365.0 95 430.0 111 300.0 78 386. 370 121 56 TETON RIVER ST. ANTHONY NR, ID APR-JUL 430.0 107 510.0 127 350.0 87 403. 464 179 82 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 129.0 91 162.0 114 96.0 68 142. 229 60 69 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 71.0 83 100.0 116 43.0 50 86. 94 16 33 PORTNEUF RIVER TOPAZ, ID APR-SEP 96.0 101 108.0 114 84.0 88 95. 120 49 62 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 28.0 97 38.0 131 17.3 60 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 230.0 90 310.0 121 153.0 60 256. 431 67 67 MAGIC RESERVOIR INFLOW, ID APR-JUL 240.0 82 340.0 117 138.0 47 291. 591 68 41 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 74.0 85 98.0 113 49.0 56 87. 163 30 55 MIDDLE SNAKE BASINS May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 189.0 91 270.0 130 110.0 53 208. 276 64 53 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 475.0 77 625.0 102 325.0 53 613. 1050 377 63 OWYHEE RES OUTFLOW APR-JUL 18.8 9 35.0 16 11.3 5 217. 594 26 9 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 630.0 99 740.0 116 520.0 82 636. 828 280 82 BOISE NR, ID (1) APR-JUL 1330.0 94 1580.0 112 1090.0 77 1414. 2060 597 68 PARMA NR, ID APR-JUL 285.0 48 510.0 86 117.0 20 593. 1102 321 41 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 495.0 91 600.0 111 390.0 72 542. 816 169 64 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 87.0 79 98.0 89 77.0 70 110. 239 60 51 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 73.0 90 81.0 100 66.0 81 81. 155 46 64 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1680.0 104 2010.0 124 1360.0 84 1617. 2214 727 74 EMMETT NR, ID APR-JUL 1370.0 110 1720.0 138 1020.0 82 1246. 1977 725 69 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 135.0 101 159.0 119 111.0 83 134. 180 41 80 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 525.0 106 630.0 127 420.0 85 495. 684 238 78 WEISER RIVER WEISER NR, ID (1) APR-JUL 445.0 114 585.0 150 305.0 78 391. 717 417 80 BURNT RIVER HEREFORD NR, OR MAR-JUL 51.0 100 60.0 118 43.0 84 51. 81 LOWER SNAKE AND CENTRAL OREGON BASINS May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 78.0 111 92.0 131 64.0 91 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 310.0 103 365.0 121 250.0 83 301. 394 95 63 SALMON RIVER SALMON, ID (1) APR-JUL 855.0 100 1140.0 133 565.0 66 857. 1078 460 84 WHITEBIRD, ID (1) JAN-JUL 6590.0 97 7710.0 113 5460.0 80 6805. 7274 2123 83 APR-JUL 5820.0 99 6950.0 119 4700.0 80 5851. 6441 2123 83 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 260.0 104 300.0 120 220.0 88 249. 238 160 75 APR-JUL 215.0 117 255.0 139 175.0 95 184. 202 160 75 TROY, OR (1) MAR-JUL 1710.0 108 2110.0 134 1310.0 83 1578. 1573 828 66 APR-JUL 1500.0 118 1900.0 149 1100.0 86 1274. 1369 828 66 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 5250.0 113 6390.0 138 4110.0 88 4645. 4316 1449 57 SPALDING, ID (1) JAN-JUL 9590.0 99 11200.0 116 7990.0 83 9683. 9175 2750 55 APR-JUL 8470.0 114 10100.0 136 6870.0 92 7435. 7274 2750 55 APR-SEP 8880.0 113 10500.0 134 7280.0 93 7849. 7550 2750 55 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3320.0 94 3820.0 108 2820.0 80 3547. 3507 1025 51 APR-JUL 2930.0 111 3430.0 130 2430.0 92 2644. 2676 1025 51 APR-SEP 3110.0 111 3610.0 129 2610.0 93 2803. 2786 1025 51 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 61.0 115 71.0 134 50.0 94 53. 63 70 90 UMATILLA RIVER GIBBON NR, OR APR-JUL 78.0 107 96.0 132 60.0 82 73. 86 97 79 PENDLETON, OR APR-JUL 161.0 108 200.0 134 123.0 83 149. 178 247 83 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 183.0 114 210.0 131 158.0 99 160. 0 APR-JUL 141.0 115 167.0 136 116.0 94 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 620.0 104 765.0 128 475.0 80 597. 745 498 74 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1170.0 101 1470.0 127 870.0 75 1153. 1235 687 67 APR-SEP 960.0 111 1260.0 146 660.0 76 865. 1038 687 67 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 500.0 95 530.0 100 470.0 89 528. 497 518 91 May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 151.0 82 184.0 100 119.0 65 184. 316 128 56 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 33.0 92 45.0 125 21.0 58 36. 59 WESTSIDE AND SOUTHERN OREGON BASINS May-08 Final ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6630.0 104 7760.0 122 5500.0 86 6365. 5621 4471 81 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3260.0 101 4070.0 127 2460.0 76 3217. 3453 2404 76 APR-JUL 2070.0 123 2880.0 171 1270.0 75 1689. 1642 2404 76 APR-SEP 2360.0 123 3170.0 165 1550.0 81 1922. 1817 2404 76 CASTLE ROCK, WA APR-SEP 3130.0 119 4240.0 161 2020.0 77 2639. 2380 4052 82 JAN-JUL 4760.0 101 5870.0 125 3650.0 78 4709. 5136 4052 82 LEWIS RIVER ARIEL, WA JAN-JUL 2350.0 100 2520.0 107 2190.0 93 2351. 2514 2110 77 MCKENZIE RIVER VIDA NR, OR APR-SEP 1400.0 117 1550.0 129 1240.0 103 1201. 1142 2079 97 S. SANTIAM RIVER WATERLOO, OR APR-SEP 705.0 120 880.0 150 530.0 90 587. 540 1798 96 N. SANTIAM RIVER MEHAMA, OR APR-SEP 1080.0 129 1290.0 155 875.0 105 834. 754 1867 96 WILLAMETTE RIVER SALEM, OR APR-SEP 5720.0 119 6750.0 141 4700.0 98 4804. 4373 13520 94 CLACKAMAS RIVER ESTACADA, OR APR-SEP 965.0 129 1070.0 143 855.0 114 748. 678 1352 87 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 172.0 114 193.0 128 151.0 100 151. 156 145 89 JAN-JUL 192.0 106 215.0 119 171.0 94 181. 195 145 89 ROGUE RIVER RAYGOLD, OR APR-SEP 980.0 110 1070.0 120 885.0 100 889. 895 1432 89 JAN-JUL 1610.0 102 1700.0 107 1510.0 95 1584. 1970 1432 89 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 62.0 70 84.0 94 39.0 44 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 87.0 67 133.0 103 41.0 32 129. 196 APR-SEP 88.0 89 134.0 135 42.0 42 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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