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Water Supply Forecasts Northwest River Forecast Center Thursday May 17, 2007 at 21:35 GMT Observed precipitation through the 14th Future precip is 80% of normal for the rest of May in the Snake Basin and normal for other areas and for the rest of the period No snow included Observed runoff through April note: current month runoff based on OBSERVED + ESP to the end of MAY UPPER COLUMBIA BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % COLUMBIA RIVER MICA RESERVOIR INFLOW, BC JAN-JUL 11000.0 114 12300.0 128 9710.0 101 9619. 9985 4671 108 FEB-SEP 14800.0 114 16100.0 124 13600.0 105 12960. 12300 4671 108 APR-SEP 14300.0 114 15500.0 124 13000.0 104 12500. 11850 4671 108 REVELSTOKE, BC JAN-JUL 15600.0 112 16600.0 120 14500.0 104 13880. 14190 6581 101 ARROW LAKES INFLOW JAN-JUL 22900.0 109 24800.0 118 21000.0 100 20960. 20790 10990 97 FEB-SEP 29100.0 110 31000.0 117 27200.0 103 26460. 24050 10990 97 APR-SEP 27600.0 110 29500.0 117 25700.0 102 25110. 22920 10990 97 BIRCHBANK, BC (1) JAN-JUL 43200.0 111 47400.0 122 38900.0 100 38930. 41180 24160 109 APR-SEP 47400.0 109 51600.0 119 43100.0 99 43500. 42860 24160 109 GRAND COULEE, WA (1) JAN-JUL 65400.0 104 71600.0 114 59300.0 94 62900. 66890 43340 106 APR-SEP 65000.0 102 71200.0 111 58800.0 92 63990. 63870 43340 106 ROCK ISLAND DAM BLO, WA (1) JAN-JUL 73700.0 107 81000.0 118 66400.0 96 68910. 71930 48450 108 APR-SEP 72800.0 105 80100.0 115 65500.0 94 69540. 68910 48450 108 THE DALLES NR, OR (1) JAN-JUL 99100.0 92 109000.0 102 89500.0 83 107300. 114700 77140 96 APR-AUG 84200.0 90 93700.0 101 74700.0 80 93090. 97540 77140 96 APR-SEP 89200.0 90 98800.0 100 79700.0 81 98650. 101700 77140 96 KOOTENAI RIVER LIBBY RES INFLOW, MT (1) JAN-JUL 7100.0 113 8220.0 130 5970.0 95 6306. 6909 4504 120 APR-AUG 6900.0 110 8030.0 129 5780.0 93 6248. 6628 4504 120 APR-SEP 7340.0 111 8470.0 128 6220.0 94 6638. 6922 4504 120 LEONIA, ID (1) APR-JUL 7520.0 107 8910.0 127 6130.0 87 7041. 7768 6228 118 APR-SEP 8680.0 107 10100.0 124 7290.0 90 8125. 8545 6228 118 BONNERS FERRY, ID APR-JUL 7930.0 104 9350.0 123 6630.0 87 7619. 8380 7097 121 KOOTENAY RIVER KOOTENAY LAKE INFLOW, BC JAN-JUL 18100.0 113 20100.0 126 16200.0 101 16010. 17210 11760 118 APR-SEP 18000.0 109 20300.0 123 15800.0 96 16450. 16790 11760 118 DUNCAN RIVER DUNCAN RESERVOIR INFLOW, BC JAN-JUL 2030.0 113 2380.0 132 1670.0 93 1800. 2033 954 108 FEB-SEP 2590.0 112 2950.0 128 2240.0 97 2305. 2361 954 108 APR-SEP 2470.0 111 2830.0 127 2120.0 95 2227. 2291 954 108 CLARK FORK BLACKFOOT RIVER ABV, MT APR-SEP 565.0 80 790.0 112 345.0 49 704. 504 567 89 MISSOULA ABV, MT APR-SEP 1290.0 81 1540.0 97 1040.0 65 1595. 1344 1283 99 MISSOULA BLO, MT APR-SEP 2380.0 80 2750.0 93 2010.0 68 2962. 2770 2432 108 ST. REGIS, MT (1) APR-SEP 3130.0 80 3870.0 99 2390.0 61 3907. 3648 3214 105 PLAINS NR, MT (1) APR-SEP 9710.0 88 11400.0 103 8060.0 73 11060. 10840 8646 107 WHITEHORSE RAPIDS, ID (1) APR-SEP 10700.0 86 12600.0 101 8830.0 71 12460. 12060 9703 103 BLACKFOOT RIVER BONNER NR, MT APR-SEP 720.0 81 805.0 90 630.0 71 892. 840 714 108 BITTERROOT RIVER AT MOUTH, MT APR-SEP 1100.0 81 1270.0 93 920.0 67 1364. 1319 1065 112 May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % N.F. FLATHEAD RIVE COLUMBIA FALLS NR, MT APR-SEP 1780.0 99 1960.0 109 1590.0 88 1801. 1780 1494 129 M.F. FLATHEAD RIVE WEST GLACIER NR, MT APR-SEP 1610.0 93 1800.0 103 1410.0 81 1740. 1737 1356 122 S.F. FLATHEAD RIVE HUNGRY HORSE RES IN, MT (1) JAN-JUL 2170.0 98 2580.0 116 1750.0 79 2224. 2357 1763 118 APR-SEP 1930.0 91 2350.0 111 1510.0 71 2124. 2175 1763 118 UPPER/MIDDLE COLUMBIA BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % FLATHEAD RIVER COLUMBIA FALLS, MT APR-SEP 5500.0 94 6230.0 107 4760.0 82 5825. 6002 4579 118 FLATHEAD LAKE INFLOW, MT (1) APR-SEP 6280.0 94 7450.0 111 5100.0 76 6713. 7002 5484 118 PRIEST RIVER PRIEST RIVER, ID (1) APR-JUL 725.0 89 915.0 112 535.0 66 814. 997 949 108 PEND OREILLE RIVER PEND OREILLE LAKE IN, ID (1) APR-SEP 11900.0 86 14000.0 101 9860.0 71 13910. 14260 12300 110 APR-JUL 10900.0 86 13000.0 102 8850.0 69 12740. 13520 12300 110 BOX CANYON BLO, WA (1) APR-SEP 12200.0 87 14400.0 102 10200.0 72 14090. 14500 12660 110 KETTLE RIVER LAURIER NR, WA APR-SEP 1840.0 93 2100.0 106 1580.0 80 1972. 2366 1265 93 COEUR D'ALENE RIVE ENAVILLE, ID (1) APR-SEP 560.0 72 655.0 84 465.0 60 778. 871 1229 106 APR-JUL 530.0 72 625.0 85 435.0 59 739. 841 1229 106 COEUR D'ALENE LAKE IN, ID APR-JUL 1850.0 72 2130.0 83 1570.0 62 2552. 2456 3654 96 SPOKANE RIVER SPOKANE, WA (1) APR-SEP 2090.0 76 2160.0 79 2020.0 74 2744. 2705 3970 103 ST JOE RIVER CALDER, ID APR-SEP 975.0 81 1090.0 90 860.0 71 1205. 1263 1352 107 APR-JUL 920.0 81 1030.0 91 805.0 71 1136. 1203 1352 107 OKANAGAN RIVER TONASKET NR, WA (1) APR-SEP 1990.0 113 2460.0 139 1520.0 86 1766. 1470 1660 138 SIMILKAMEEN RIVER NIGHTHAWK NR, WA (1) APR-JUL 1620.0 120 1930.0 143 1300.0 96 1350. 1079 1455 164 APR-SEP 1740.0 120 2060.0 142 1430.0 99 1450. 1122 1455 164 METHOW RIVER PATEROS NR, WA (1) APR-SEP 1230.0 125 1430.0 145 1020.0 104 985. 1144 936 156 CHELAN RIVER LAKE CHELAN INFLOW, WA (1) APR-SEP 1340.0 113 1550.0 131 1130.0 95 1185. 1345 1164 148 WENATCHEE RIVER PESHASTIN, WA APR-SEP 1680.0 103 2180.0 133 1170.0 72 1635. 1669 1736 130 YAKIMA AND MAINSTEM SNAKE BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % YAKIMA RIVER KEECHELUS LAKE IN, WA (1) APR-SEP 128.0 96 151.0 114 105.0 79 133. 137 218 112 CLE ELUM, WA APR-SEP 845.0 94 975.0 108 715.0 79 903. 906 1317 118 PARKER NR, WA APR-SEP 1940.0 101 2240.0 117 1630.0 85 1918. 2346 3324 131 KACHESS RIVER KACHESS LAKE INFLOW, WA (1) APR-SEP 117.0 98 135.0 113 99.0 83 120. 122 204 120 CLE ELUM RIVER CLE ELUM LAKE INFLOW, WA (1) APR-SEP 440.0 98 505.0 113 380.0 85 448. 475 574 126 NACHES RIVER NACHES NR, WA APR-SEP 835.0 100 960.0 115 710.0 85 837. 1086 1319 146 BUMPING RIVER BUMPING LAKE INFLOW, WA (1) APR-SEP 134.0 100 162.0 121 106.0 79 134. 154 191 139 TIETON RIVER RIMROCK LAKE INFLOW, WA (1) APR-SEP 240.0 99 270.0 112 210.0 87 242. 244 324 133 AHTANUM CREEKS TAMPICO NR, WA APR-SEP 37.0 80 52.0 113 22.0 48 46. 0 SNAKE RIVER JACKSON LAKE INFLOW, WY (1) APR-JUL 600.0 74 755.0 93 445.0 55 815. 812 499 94 APR-SEP 665.0 74 820.0 91 510.0 56 904. 861 499 94 PALISADES RES INFLOW, ID (1) APR-JUL 2110.0 63 2550.0 77 1670.0 50 3331. 3267 2047 83 APR-SEP 2460.0 63 2900.0 75 2020.0 52 3875. 3672 2047 83 HEISE NR, ID APR-JUL 2280.0 64 2770.0 78 1790.0 50 3561. 3618 2374 86 APR-SEP 2660.0 64 3150.0 76 2170.0 52 4159. 4188 2374 86 SHELLEY NR, ID (1) APR-JUL 2880.0 65 3440.0 78 2330.0 53 4428. 4634 3434 91 APR-SEP 3460.0 65 4010.0 75 2910.0 55 5324. 5339 3434 91 BLACKFOOT NR, ID (1) APR-JUL 2900.0 63 3490.0 76 2310.0 50 4604. 0 AMER. FALLS RES IN, ID (1) APR-JUL 1390.0 43 2200.0 68 580.0 18 3242. 2929 3038 70 MILNER, ID APR-JUL 198.0 16 390.0 32 130.0 11 1228. 996 539 22 KING HILL, ID (1) APR-JUL 1630.0 54 2430.0 80 825.0 27 3045. 3030 3691 60 MURPHY NR, ID (1) APR-JUL 1600.0 52 2480.0 80 730.0 24 3092. 3104 3805 60 WEISER, ID (1) JAN-JUL 5000.0 51 6420.0 66 3590.0 37 9793. 12140 5881 56 APR-JUL 2710.0 47 4130.0 72 1290.0 22 5765. 8160 5881 56 APR-SEP 4090.0 57 5510.0 77 2670.0 37 7192. 9471 5881 56 BROWNLEE RES INFLOW APR-JUL 2930.0 46 4640.0 73 1210.0 19 6313. 8975 6336 56 APR-SEP 4180.0 54 5900.0 76 2460.0 32 7801. 10350 6336 56 HELLS CANYON, ID (1) APR-JUL 3010.0 46 4580.0 71 1430.0 22 6493. 9324 6576 57 APR-SEP 4400.0 55 5970.0 75 2820.0 35 7977. 10740 6576 57 LOWER GRANITE RES IN, WA (1) JAN-JUL 20500.0 68 24100.0 80 17000.0 57 30020. 32200 20000 77 FEB-SEP 20800.0 68 24400.0 80 17300.0 57 30370. 31790 20000 77 APR-JUL 14200.0 66 17700.0 82 10600.0 49 21550. 24440 20000 77 APR-SEP 15900.0 66 19500.0 81 12400.0 51 24140. 26590 20000 77 UPPER SNAKE BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % GREY'S RIVER PALISADES ABV, WY APR-SEP 250.0 63 300.0 76 200.0 51 394. 401 230 95 SALT RIVER ETNA NR, WY APR-JUL 181.0 53 240.0 70 121.0 35 342. 363 279 76 HENRYS FORK ASHTON NR, ID APR-JUL 370.0 65 440.0 77 295.0 52 571. 659 715 86 ST. ANTHONY, ID APR-JUL 485.0 66 590.0 80 370.0 50 734. 819 965 95 REXBURG NR, ID APR-JUL 1010.0 65 1180.0 76 830.0 53 1559. 1016 1220 71 FALLS RIVER SQUIRREL NR, ID (1) APR-JUL 245.0 63 300.0 78 189.0 49 386. 370 254 72 TETON RIVER ST. ANTHONY NR, ID APR-JUL 275.0 68 350.0 87 200.0 50 403. 464 329 99 BIG LOST RIVER MACKAY RESERVOIR INFLOW, ID APR-JUL 79.0 56 120.0 85 39.0 27 142. 229 97 82 WILLOW CREEK RIRIE RESERVOIR INFLOW APR-JUL 22.0 26 48.0 56 0.0 0 86. 94 39 43 PORTNEUF RIVER TOPAZ, ID APR-SEP 48.0 51 60.0 63 36.0 38 95. 120 73 69 GOOSE CREEK OAKLEY RES INFLOW, ID APR-JUL 17.7 61 23.0 79 12.1 42 29. 0 BIG WOOD RIVER HAILEY, ID (1) APR-JUL 128.0 50 205.0 80 52.0 20 256. 431 141 78 MAGIC RESERVOIR INFLOW, ID APR-JUL 69.0 24 120.0 41 17.9 6 291. 591 109 42 LITTLE WOOD RIVER CAREY NR, ID APR-JUL 18.7 21 36.0 41 1.6 2 87. 163 34 40 MIDDLE SNAKE BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % BRUNEAU RIVER HOT SPRING NR, ID APR-JUL 109.0 52 153.0 74 65.0 31 208. 276 119 59 OWYHEE RIVER OWYHEE RES INFLOW, OR MAR-JUL 142.0 23 205.0 33 77.0 13 613. 1050 265 36 OWYHEE RES OUTFLOW APR-JUL 21.0 10 28.0 13 13.4 6 217. 594 59 17 BOISE RIVER TWIN SPRINGS NR, ID (1) APR-JUL 390.0 61 490.0 77 290.0 46 636. 828 449 79 BOISE NR, ID (1) APR-JUL 765.0 54 1000.0 71 535.0 38 1414. 2060 992 71 PARMA NR, ID APR-JUL 111.0 19 240.0 40 80.0 13 593. 1102 362 37 S.F. BOISE RIVER ANDERSON RNCH RES IN, ID (1) APR-JUL 270.0 50 375.0 69 169.0 31 542. 816 319 68 MALHEUR RIVER DREWSEY NR, OR MAR-JUL 40.0 36 45.0 41 35.0 32 110. 239 65 46 N.F. MALHEUR RIVER BEULAH RES INFLOW, OR (1) MAR-JUL 23.0 28 27.0 33 18.9 23 81. 155 39 42 PAYETTE RIVER HORSESHOE BEND NR, ID (1) APR-JUL 1020.0 63 1340.0 83 695.0 43 1617. 2214 1324 85 EMMETT NR, ID APR-JUL 760.0 61 1110.0 89 410.0 33 1246. 1977 952 66 DEADWOOD RIVER DEADWOOD RES INFLOW, ID (1) APR-JUL 97.0 72 121.0 90 73.0 54 134. 180 108 106 N.F. PAYETTE RIVER CASCADE RES INFLOW, ID (1) APR-JUL 320.0 65 420.0 85 225.0 45 495. 684 436 88 WEISER RIVER WEISER NR, ID (1) APR-JUL 161.0 41 285.0 73 36.0 9 391. 717 308 46 BURNT RIVER HEREFORD NR, OR MAR-JUL 20.0 39 24.0 47 16.8 33 51. 81 31 49 LOWER SNAKE AND CENTRAL OREGON BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % POWDER RIVER SUMPTER NR, OR MAR-JUL 37.0 53 46.0 66 27.0 39 70. 90 IMNAHA RIVER IMNAHA, OR MAR-JUL 205.0 68 245.0 81 161.0 53 301. 394 192 78 SALMON RIVER SALMON, ID (1) APR-JUL 620.0 72 905.0 106 335.0 39 857. 1078 835 108 WHITEBIRD, ID (1) JAN-JUL 5070.0 75 6070.0 89 4070.0 60 6805. 7274 4445 99 APR-JUL 4150.0 71 5150.0 88 3160.0 54 5851. 6441 4445 99 GRANDE RONDE RIVER LA GRANDE, OR MAR-JUL 138.0 55 157.0 63 120.0 48 249. 238 178 63 APR-JUL 84.0 46 103.0 56 65.0 35 184. 202 178 63 TROY, OR (1) MAR-JUL 1070.0 68 1470.0 93 675.0 43 1578. 1573 1326 78 APR-JUL 790.0 62 1180.0 93 395.0 31 1274. 1369 1326 78 CLEARWATER RIVER OROFINO, ID (1) APR-JUL 3700.0 80 4760.0 102 2650.0 57 4645. 4316 4209 97 SPALDING, ID (1) JAN-JUL 8200.0 85 9660.0 100 6740.0 70 9683. 9175 7685 99 APR-JUL 5840.0 79 7300.0 98 4380.0 59 7435. 7274 7685 99 APR-SEP 6190.0 79 7650.0 97 4730.0 60 7849. 7550 7685 99 N.F. CLEARWATER RI DWORSHAK RES INFLOW, ID (1) JAN-JUL 3000.0 85 3440.0 97 2570.0 72 3547. 3507 3004 99 APR-JUL 2060.0 78 2500.0 95 1630.0 62 2644. 2676 3004 99 APR-SEP 2190.0 78 2620.0 93 1750.0 62 2803. 2786 3004 99 S.F. WALLA WALLA R MILTON NR, OR APR-JUL 41.0 77 49.0 92 33.0 62 53. 63 102 107 UMATILLA RIVER GIBBON NR, OR APR-JUL 43.0 59 53.0 73 33.0 45 73. 86 140 93 PENDLETON, OR APR-JUL 74.0 50 90.0 60 58.0 39 149. 178 308 88 M.F. JOHN DAY RIVE RITTER, OR (1) MAR-JUL 84.0 52 102.0 64 67.0 42 160. 0 APR-JUL 65.0 53 83.0 67 48.0 39 123. 0 N.F. JOHN DAY RIVE MONUMENT NR, OR APR-JUL 325.0 54 410.0 69 240.0 40 597. 745 693 76 JOHN DAY RIVER SERVICE CREEK, OR (1) MAR-SEP 740.0 64 1030.0 89 455.0 39 1153. 1235 927 69 APR-SEP 475.0 55 760.0 88 191.0 22 865. 1038 927 69 DESCHUTES RIVER BENHAM FALLS, OR APR-SEP 490.0 93 520.0 98 465.0 88 528. 497 627 95 May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % CROOKED RIVER PRINEVILLE RES INFLOW, OR MAR-JUL 117.0 64 130.0 71 105.0 57 184. 316 175 67 OCHOCO CREEK OCHOCO RES INFLOW, OR MAR-JUL 26.0 72 30.0 83 22.0 61 36. 59 WESTSIDE AND SOUTHERN OREGON BASINS May-07 Mid Month ________________Forecast______________ __________Runoff___________ Stream and Station Probable % Maximum % Minimum % Average PrevYr CurYR % SKAGIT RIVER CONCRETE NR, WA APR-SEP 6300.0 99 7440.0 117 5170.0 81 6365. 5621 8916 127 COWLITZ RIVER MAYFIELD RES INFLOW, WA JAN-JUL 3230.0 100 4020.0 125 2440.0 76 3217. 3453 4314 116 APR-JUL 1500.0 89 2290.0 136 715.0 42 1689. 1642 4314 116 APR-SEP 1710.0 89 2500.0 130 915.0 48 1922. 1817 4314 116 CASTLE ROCK, WA APR-SEP 2160.0 82 3250.0 123 1070.0 41 2639. 2380 6595 117 JAN-JUL 4660.0 99 5750.0 122 3570.0 76 4709. 5136 6595 117 LEWIS RIVER ARIEL, WA JAN-JUL 2370.0 101 2480.0 105 2260.0 96 2351. 2514 3118 102 MCKENZIE RIVER VIDA NR, OR APR-SEP 960.0 80 1040.0 87 875.0 73 1201. 1142 2513 102 S. SANTIAM RIVER WATERLOO, OR APR-SEP 400.0 68 510.0 87 290.0 49 587. 540 2146 104 N. SANTIAM RIVER MEHAMA, OR APR-SEP 600.0 72 730.0 88 475.0 57 834. 754 2316 106 WILLAMETTE RIVER SALEM, OR APR-SEP 3370.0 70 3960.0 82 2780.0 58 4804. 4373 15460 99 CLACKAMAS RIVER ESTACADA, OR APR-SEP 560.0 75 650.0 87 475.0 64 748. 678 1896 108 N. UMPQUA RIVER LEMOLO LAKE INFLOW, OR (1) APR-SEP 112.0 74 133.0 88 91.0 60 151. 156 149 77 JAN-JUL 141.0 78 162.0 90 119.0 66 181. 195 149 77 ROGUE RIVER RAYGOLD, OR APR-SEP 735.0 83 795.0 89 675.0 76 889. 895 1658 90 JAN-JUL 1320.0 83 1380.0 87 1260.0 80 1584. 1970 1658 90 CHEWAUCAN RIVER PAISLEY NR, OR MAR-JUL 55.0 62 78.0 88 33.0 37 89. 16 SILVIES RIVER BURNS NR, OR MAR-JUL 37.0 29 83.0 64 0.0 0 129. 196 49 34 APR-SEP 25.0 25 71.0 72 0.0 0 99. 167 49 34 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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