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Water Supply Forecasts Northwest River Forecast Center Thursday May 21, 2009 at 19:36 GMT Observed precipitation through the 18th Future precip_80% end of month, then 90% rest of season No snow included Observed runoff through April note: current month runoff based on OBSERVED + ESP to the end of MAY UPPER COLUMBIA BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 8590.0 89 9870.0 103 7310.0 76 9619. 9199 3167 73 FEB-JUL 8350.0 89 9630.0 103 7070.0 75 9372. 8909 3167 73 APR-SEP 11200.0 90 12400.0 99 9890.0 79 12500. 11570 3167 73 REVELSTOKE, BC JAN-JUL 12300.0 89 13400.0 97 11200.0 81 13880. 13420 5019 77 ARROW LAKES INFLOW JAN-JUL 18500.0 88 20400.0 97 16600.0 79 20960. 19230 8406 74 FEB-JUL 17900.0 88 19800.0 98 16000.0 79 20230. 18670 8406 74 APR-SEP 22400.0 89 24300.0 97 20500.0 82 25110. 22910 8406 74 BIRCHBANK, BC (1) JAN-JUL 33400.0 86 37700.0 97 29200.0 75 38930. 36130 16300 73 APR-SEP 37700.0 87 42000.0 97 33500.0 77 43500. 40800 16300 73 GRAND COULEE, WA (1) JAN-JUL 54900.0 87 61100.0 97 48700.0 77 62900. 59650 31460 77 APR-SEP 57200.0 89 63400.0 99 51000.0 80 63990. 62860 31460 77 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 60100.0 87 67400.0 98 52800.0 77 68910. 64110 34280 76 APR-SEP 62000.0 89 69300.0 100 54700.0 79 69540. 67150 34280 76 THE DALLES NR, OR (1) JAN-JUL 92000.0 86 102000.0 95 82500.0 77 107300. 99210 65480 82 APR-AUG 82400.0 89 91900.0 99 72900.0 78 93090. 93200 65480 82 APR-SEP 87300.0 88 96800.0 98 77800.0 79 98650. 97910 65480 82 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 5170.0 82 6300.0 100 4050.0 64 6306. 5516 2395 64 APR-AUG 5220.0 84 6340.0 101 4090.0 65 6248. 5539 2395 64 APR-SEP 5540.0 83 6660.0 100 4410.0 66 6638. 5887 2395 64 LEONIA, ID (1) APR-JUL 5910.0 84 7300.0 104 4520.0 64 7041. 6568 3418 65 APR-SEP 6820.0 84 8210.0 101 5430.0 67 8125. 7516 3418 65 BONNERS FERRY, ID APR-JUL 6400.0 84 7760.0 102 5040.0 66 7619. 7099 3761 64 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 13000.0 81 15000.0 94 11100.0 69 16010. 14250 6574 66 APR-SEP 13700.0 83 15900.0 97 11500.0 70 16450. 15060 6574 66 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 1630.0 91 1980.0 110 1270.0 71 1800. 1691 772 88 FEB-JUL 1570.0 90 1930.0 111 1220.0 70 1746. 1638 772 88 APR-SEP 2010.0 90 2370.0 106 1660.0 75 2227. 2111 772 88 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 790.0 112 1010.0 143 565.0 80 704. 852 770 121 MISSOULA ABV, MT APR-SEP 1750.0 110 2000.0 125 1500.0 94 1595. 1798 1531 118 MISSOULA BLO, MT APR-SEP 3170.0 107 3540.0 120 2790.0 94 2962. 3420 2478 110 ST. REGIS, MT (1) APR-SEP 4090.0 105 4830.0 124 3350.0 86 3907. 4509 3225 105 PLAINS NR, MT (1) APR-SEP 10400.0 94 12100.0 109 8790.0 79 11060. 12090 6924 85 WHITEHORSE RAPIDS, ID (1) APR-SEP 11900.0 96 13800.0 111 9990.0 80 12460. 13630 7640 81 BLACKFOOT RIVER BONNER NR, MT APR-SEP 955.0 107 1040.0 117 865.0 97 892. 946 762 115 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1370.0 100 1550.0 114 1200.0 88 1364. 1597 1012 106 May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1440.0 80 1630.0 91 1260.0 70 1801. 1865 744 64 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1570.0 90 1770.0 102 1370.0 79 1740. 2103 829 74 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2070.0 93 2490.0 112 1650.0 74 2224. 2506 1311 88 APR-SEP 2010.0 95 2420.0 114 1590.0 75 2124. 2530 1311 88 UPPER/MIDDLE COLUMBIA BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5170.0 89 5900.0 101 4440.0 76 5825. 6676 2889 74 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6010.0 90 7190.0 107 4840.0 72 6713. 7562 3827 82 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 715.0 88 905.0 111 525.0 64 814. 849 591 67 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 13100.0 94 15200.0 109 11000.0 79 13910. 15810 9525 85 APR-JUL 12000.0 94 14100.0 111 9900.0 78 12740. 14580 9525 85 BOX CANYON BLO, WA (1) APR-SEP 13300.0 94 15500.0 110 11200.0 79 14090. 16110 9757 85 KETTLE RIVER LAURIER NR, WA APR-SEP 1710.0 87 1970.0 100 1450.0 74 1972. 1517 876 64 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 855.0 110 950.0 122 760.0 98 778. 1302 988 85 APR-JUL 810.0 110 905.0 122 715.0 97 739. 1258 988 85 COEUR D'ALENE LAKE IN, ID APR-JUL 2530.0 99 2810.0 110 2250.0 88 2552. 3826 3689 97 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2770.0 101 2840.0 103 2700.0 98 2744. 4128 3778 98 ST JOE RIVER CALDER, ID APR-SEP 1120.0 93 1230.0 102 1010.0 84 1205. 1656 1195 94 APR-JUL 1060.0 93 1170.0 103 945.0 83 1136. 1571 1195 94 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1170.0 66 1640.0 93 700.0 40 1766. 1542 737 61 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 855.0 63 1170.0 87 540.0 40 1350. 1189 614 69 APR-SEP 920.0 63 1230.0 85 605.0 42 1450. 1259 614 69 METHOW RIVER PATEROS NR, WA (1) APR-SEP 685.0 70 895.0 91 475.0 48 985. 926 498 83 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 880.0 74 1090.0 92 675.0 57 1185. 1157 660 84 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1340.0 82 1850.0 113 835.0 51 1635. 1521 1216 91 YAKIMA AND MAINSTEM SNAKE BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 130.0 98 153.0 115 106.0 80 133. 174 184 95 CLE ELUM, WA APR-SEP 890.0 99 1020.0 113 760.0 84 903. 1013 1187 106 PARKER NR, WA APR-SEP 1980.0 103 2280.0 119 1670.0 87 1918. 2325 2580 102 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 118.0 98 136.0 113 100.0 83 120. 150 164 96 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 440.0 98 505.0 113 375.0 84 448. 479 439 97 NACHES RIVER NACHES NR, WA APR-SEP 820.0 98 945.0 113 695.0 83 837. 991 981 109 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 127.0 95 155.0 116 99.0 74 134. 155 124 90 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 235.0 97 265.0 110 205.0 85 242. 247 223 92 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 43.0 93 58.0 126 28.0 61 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 795.0 98 950.0 117 640.0 79 815. 894 498 93 APR-SEP 880.0 97 1040.0 115 725.0 80 904. 970 498 93 PALISADES RES INFLOW, ID (1) APR-JUL 3250.0 98 3680.0 110 2810.0 84 3331. 3352 2357 95 APR-SEP 3780.0 98 4210.0 109 3340.0 86 3875. 3850 2357 95 HEISE NR, ID APR-JUL 3530.0 99 4010.0 113 3040.0 85 3561. 3644 2738 99 APR-SEP 4120.0 99 4610.0 111 3630.0 87 4159. 4282 2738 99 SHELLEY NR, ID (1) APR-JUL 4450.0 100 5000.0 113 3900.0 88 4428. 4541 3805 101 APR-SEP 5350.0 100 5900.0 111 4800.0 90 5324. 5320 3805 101 BLACKFOOT NR, ID (1) APR-JUL 4480.0 97 5070.0 110 3890.0 84 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 2930.0 90 3740.0 115 2120.0 65 3242. 2731 3573 82 MILNER, ID APR-JUL 1120.0 91 1770.0 144 480.0 39 1228. 160 1135 47 KING HILL, ID (1) APR-JUL 2550.0 84 3350.0 110 1750.0 57 3045. 1765 4205 69 MURPHY NR, ID (1) APR-JUL 2700.0 87 3570.0 115 1820.0 59 3092. 1549 4484 70 WEISER, ID (1) JAN-JUL 6490.0 66 7910.0 81 5070.0 52 9793. 5966 6581 63 APR-JUL 4570.0 79 5990.0 104 3150.0 55 5765. 3926 6581 63 APR-SEP 6000.0 83 7420.0 103 4580.0 64 7192. 5218 6581 63 BROWNLEE RES INFLOW APR-JUL 4990.0 79 6710.0 106 3270.0 52 6313. 4367 7318 64 APR-SEP 6200.0 79 7920.0 102 4480.0 57 7801. 5699 7318 64 HELLS CANYON, ID (1) APR-JUL 5070.0 78 6640.0 102 3490.0 54 6493. 4738 7495 65 APR-SEP 6520.0 82 8090.0 101 4940.0 62 7977. 6060 7495 65 LOWER GRANITE RES IN, WA (1) JAN-JUL 27000.0 90 30500.0 102 23400.0 78 30020. 27520 22550 87 FEB-SEP 27400.0 90 30900.0 102 23800.0 78 30370. 28890 22550 87 APR-JUL 21000.0 97 24500.0 114 17400.0 81 21550. 22830 22550 87 APR-SEP 23300.0 97 26800.0 111 19700.0 82 24140. 25390 22550 87 UPPER SNAKE BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 395.0 100 445.0 113 350.0 89 394. 389 247 102 SALT RIVER ETNA NR, WY APR-JUL 340.0 99 400.0 117 280.0 82 342. 311 365 99 HENRYS FORK ASHTON NR, ID APR-JUL 515.0 90 585.0 102 440.0 77 571. 518 702 84 ST. ANTHONY, ID APR-JUL 665.0 91 780.0 106 555.0 76 734. 703 945 93 REXBURG NR, ID APR-JUL 1330.0 85 1510.0 97 1150.0 74 1559. 905 1173 69 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 315.0 82 370.0 96 260.0 67 386. 308 206 58 TETON RIVER ST. ANTHONY NR, ID APR-JUL 350.0 87 425.0 105 275.0 68 403. 445 315 95 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 117.0 82 158.0 111 77.0 54 142. 80 91 77 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 69.0 80 96.0 112 43.0 50 86. 41 60 67 PORTNEUF RIVER TOPAZ, ID APR-SEP 57.0 60 69.0 73 45.0 47 95. 61 69 65 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 25.0 86 30.0 103 19.1 66 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 183.0 71 260.0 102 107.0 42 256. 185 152 84 MAGIC RESERVOIR INFLOW, ID APR-JUL 156.0 54 205.0 70 105.0 36 291. 172 134 52 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 45.0 52 63.0 72 28.0 32 87. 50 48 57 MIDDLE SNAKE BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 192.0 92 235.0 113 148.0 71 208. 155 168 83 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 375.0 61 440.0 72 310.0 51 613. 452 433 58 OWYHEE RES OUTFLOW APR-JUL 11.2 5 18.8 9 7.3 3 217. 53 38 11 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 555.0 87 655.0 103 455.0 72 636. 655 482 85 BOISE NR, ID (1) APR-JUL 1170.0 83 1410.0 100 940.0 66 1414. 1290 1080 77 PARMA NR, ID APR-JUL 380.0 64 595.0 100 176.0 30 593. 319 424 43 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 430.0 79 535.0 99 330.0 61 542. 442 369 79 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 56.0 51 61.0 55 51.0 46 110. 85 65 46 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 45.0 56 49.0 60 41.0 51 81. 80 55 59 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1390.0 86 1710.0 106 1070.0 66 1617. 1701 1375 88 EMMETT NR, ID APR-JUL 1110.0 89 1450.0 116 765.0 61 1246. 1394 1183 82 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 113.0 84 137.0 102 89.0 66 134. 141 95 94 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 420.0 85 520.0 105 325.0 66 495. 525 430 87 WEISER RIVER WEISER NR, ID (1) APR-JUL 285.0 73 410.0 105 162.0 41 391. 479 385 58 BURNT RIVER HEREFORD NR, OR MAR-JUL 47.0 92 51.0 100 44.0 86 51. 57 55 87 LOWER SNAKE AND CENTRAL OREGON BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 55.0 79 65.0 93 46.0 66 70. 80 IMNAHA RIVER IMNAHA, OR MAR-JUL 305.0 101 350.0 116 260.0 86 301. 337 253 102 SALMON RIVER SALMON, ID (1) APR-JUL 830.0 97 1120.0 131 545.0 64 857. 806 732 94 WHITEBIRD, ID (1) JAN-JUL 6680.0 98 7680.0 113 5680.0 83 6805. 7310 4346 97 APR-JUL 5860.0 100 6860.0 117 4860.0 83 5851. 6560 4346 97 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 305.0 122 325.0 131 285.0 114 249. 347 322 113 APR-JUL 255.0 139 275.0 149 235.0 128 184. 301 322 113 TROY, OR (1) MAR-JUL 2040.0 129 2430.0 154 1640.0 104 1578. 1971 1980 117 APR-JUL 1760.0 138 2160.0 170 1370.0 108 1274. 1761 1980 117 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 4750.0 102 5800.0 125 3690.0 79 4645. 5729 4554 105 SPALDING, ID (1) JAN-JUL 9480.0 98 10900.0 113 8020.0 83 9683. 10500 7799 100 APR-JUL 7510.0 101 8970.0 121 6050.0 81 7435. 9382 7799 100 APR-SEP 7920.0 101 9380.0 120 6460.0 82 7849. 9851 7799 100 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3250.0 92 3680.0 104 2820.0 80 3547. 3823 2842 94 APR-JUL 2470.0 93 2910.0 110 2040.0 77 2644. 3434 2842 94 APR-SEP 2620.0 93 3060.0 109 2190.0 78 2803. 3659 2842 94 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 92.0 174 100.0 189 84.0 158 53. 92 140 147 UMATILLA RIVER GIBBON NR, OR APR-JUL 120.0 164 130.0 178 111.0 152 73. 127 192 127 PENDLETON, OR APR-JUL 285.0 191 300.0 201 270.0 181 149. 285 484 138 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 163.0 102 181.0 113 145.0 91 160. 0 APR-JUL 126.0 102 144.0 117 108.0 88 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 735.0 123 820.0 137 650.0 109 597. 883 866 95 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 1160.0 101 1450.0 126 875.0 76 1153. 1362 1178 87 APR-SEP 960.0 111 1240.0 143 675.0 78 865. 1152 1178 87 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 520.0 98 545.0 103 495.0 94 528. 504 693 105 May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 131.0 71 143.0 78 118.0 64 184. 143 150 57 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 20.0 56 24.0 67 16.3 45 36. 33 WESTSIDE AND SOUTHERN OREGON BASINS May-09 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 5470.0 86 6600.0 104 4330.0 68 6365. 6790 5877 84 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3320.0 103 4110.0 128 2530.0 79 3217. 3468 3502 95 APR-JUL 1790.0 106 2580.0 153 1000.0 59 1689. 2328 3502 95 APR-SEP 2040.0 106 2830.0 147 1250.0 65 1922. 2615 3502 95 CASTLE ROCK, WA APR-SEP 2790.0 106 3880.0 147 1700.0 64 2639. 3330 5111 91 JAN-JUL 4820.0 102 5910.0 126 3730.0 79 4709. 4998 5111 91 LEWIS RIVER ARIEL, WA JAN-JUL 2240.0 95 2350.0 100 2130.0 91 2351. 2397 2481 81 MCKENZIE RIVER VIDA NR, OR APR-SEP 1320.0 110 1410.0 117 1240.0 103 1201. 1674 2409 98 S. SANTIAM RIVER WATERLOO, OR APR-SEP 690.0 118 800.0 136 580.0 99 587. 895 1894 92 N. SANTIAM RIVER MEHAMA, OR APR-SEP 980.0 118 1110.0 133 850.0 102 834. 1413 2184 100 WILLAMETTE RIVER SALEM, OR APR-SEP 5040.0 105 5630.0 117 4450.0 93 4804. 6084 12680 81 CLACKAMAS RIVER ESTACADA, OR APR-SEP 905.0 121 990.0 132 815.0 109 748. 1174 1665 95 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 130.0 86 151.0 100 109.0 72 151. 164 166 86 JAN-JUL 158.0 87 179.0 99 137.0 76 181. 180 166 86 ROGUE RIVER RAYGOLD, OR APR-SEP 790.0 89 850.0 96 725.0 82 889. 1076 1502 81 JAN-JUL 1340.0 85 1400.0 88 1280.0 81 1584. 1697 1502 81 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 68.0 76 90.0 101 46.0 52 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 87.0 67 132.0 102 41.0 32 129. 79 87 61 APR-SEP 71.0 72 117.0 118 26.0 26 99. 82 87 61 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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