USDA NRCS National Water & Climate Center - DATA CURRENT AS OF: June 06, 2023 10:07:34 AM - Based on June 01, 2023 forecast values LAKE TAHOE BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Marlette Lake Inflow APR-JUL 2.0 500 2.6 2.2 1.79 1.46 0.40 JUN-JUL 0.95 1.41 1.14 0.76 0.49 Lake Tahoe Rise (Gates Closed) (ft) (1,2)*APR-HIGH 3.3 284 3.7 3.4 3.2 2.8 1.16 MAY-HIGH 2.8 394 3.3 3.0 2.7 2.4 0.71 Lk Tahoe Net Inflow APR-JUL 404 400 439 418 390 369 101 JUN-JUL 176 212 191 161 140 TRUCKEE RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Donner Lake Inflow (2) APR-JUL 34 227 38 35 33 30 15.0 JUN-JUL 10.6 592 13.0 11.6 9.6 8.2 1.79 Martis Ck Res Inflow (2) APR-JUL 28 491 30 29 27 26 5.7 JUN-JUL 5.5 618 7.2 6.2 4.8 3.8 0.89 Prosser Ck Res Inflow (2) APR-JUL 92 263 100 95 89 84 35 JUN-JUL 33 388 39 35 31 27 8.5 Independence Lk Inflow (2) APR-JUL 21 200 23 22 20 18.7 10.5 JUN-JUL 11.0 344 12.9 11.8 10.2 9.1 3.2 Sagehen Ck nr Truckee APR-JUL 13.3 324 14.8 13.9 12.6 11.7 4.1 JUN-JUL 4.5 703 5.5 4.9 4.1 3.5 0.64 Stampede Res Local Inflow (2) APR-JUL 160 271 176 166 154 144 59 JUN-JUL 56 496 69 62 51 44 11.3 L Truckee R ab Boca Reservoir (2)* APR-JUL 205 285 224 213 197 186 72 JUN-JUL 58 403 73 64 52 43 14.4 Boca Res Local Inflow (2) APR-JUL 23 1513 26 24 22 19.6 1.52 JUN-JUL 1.93 6433 3.3 2.5 1.38 0.56 0.030 Truckee R ab Farad Sidewater (2) APR-JUL 240 267 261 248 232 219 90 Trukee R Ab Farad Sidewater (2) JUN-JUL 90 375 104 96 84 76 24 Truckee R at Farad (2)* APR-JUL 610 271 651 626 594 569 225 JUN-JUL 211 449 244 224 198 178 47 Galena Ck at Galena Ck State Pk APR-JUL 8.4 210 9.7 8.9 7.8 7.0 4.0 JUN-JUL 6.3 326 7.0 6.6 6.0 5.6 1.93 Steamboat Ck at Steamboat APR-JUL 15.0 714 22 17.7 12.6 9.3 2.1 JUN-JUL 9.5 1118 12.5 10.7 8.4 6.9 0.85 Pyramid Lk Elevation Change (1) (ft) LOW-HIGH 9.5 10.5 9.9 9.1 8.5 CARSON RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- EF Carson R nr Gardnerville APR-JUL 550 335 577 561 539 523 164 JUN-JUL 241 492 267 251 231 215 49 Date of 200 cfs flow (julian_day) 200 cfs Oct 08 Oct 18 Oct 12 Oct 04 Sep 28 Jul 14 Date of 500 cfs flow (julian_day) 500 cfs Sep 07 Sep 27 Sep 15 Aug 30 Aug 18 Jun 20 WF Carson R nr Woodfords APR-JUL 140 311 148 143 137 132 45 JUN-JUL 69 670 79 73 65 59 10.3 Carson R nr Carson City APR-JUL 635 477 668 648 622 602 133 JUN-JUL 295 1017 325 307 283 265 29 Marlette Lake Inflow APR-JUL 2.0 500 2.6 2.2 1.79 1.46 0.40 JUN-JUL 0.95 1.41 1.14 0.76 0.49 Kings Canyon Ck nr Carson City APR-JUL 0.60 462 0.85 0.70 0.51 0.40 0.130 JUN-JUL 0.30 500 0.46 0.36 0.25 0.180 0.060 Ash Canyon Ck nr Carson City APR-JUL 2.0 244 2.5 2.2 1.82 1.56 0.82 JUN-JUL 1.00 294 1.27 1.10 0.90 0.77 0.34 Carson R at Ft Churchill* APR-JUL 635 485 671 650 620 599 131 JUN-JUL 293 1085 322 305 281 264 27 JUN 198 792 223 208 187 172 25 WALKER RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- E Walker R nr Bridgeport (2) APR-AUG 290 659 311 299 281 269 44 JUN-AUG 181 646 192 186 176 170 28 W Walker R bl L Walker nr Coleville APR-JUL 445 291 477 458 432 413 153 JUN-JUL 305 477 328 314 296 282 64 W Walker R nr Coleville APR-JUL 425 289 452 436 414 398 147 JUN-JUL 295 434 324 307 283 266 68 Walker Lake Elevation Change (1) (ft) (1) LOW-HIGH 14.0 16.0 14.8 13.2 12.0 NORTHERN GREAT BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- McDermitt Ck nr McDermitt APR-JUL 32 438 41 35 29 24 7.3 JUN-JUL 6.0 345 8.3 6.9 5.2 4.1 1.74 UPPER HUMBOLDT RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Marys R nr Deeth APR-JUL 70 269 78 73 67 62 26 JUN-JUL 20 303 26 23 17.4 13.6 6.6 Lamoille Ck nr Lamoille APR-JUL 43 165 52 47 39 34 26 JUN-JUL 23 148 29 26 20 16.6 15.5 NF Humboldt R at Devils Gate APR-JUL 65 361 78 70 60 52 18.0 JUN-JUL 15.0 333 21 17.5 12.5 8.9 4.5 Humboldt R nr Elko APR-JUL 225 326 280 247 203 170 69 JUN-JUL 125 329 155 137 113 95 38 SF Humboldt R ab Dixie Ck APR-JUL 140 275 160 148 132 120 51 JUN-JUL 72 257 89 79 65 55 28 SF Humboldt R abv Tenmile Ck nr Elko APR-JUL 154 296 170 160 148 138 52 JUN-JUL 74 255 91 81 67 57 29 Humboldt R nr Carlin APR-JUL 415 415 534 462 371 311 100 JUN-JUL 195 342 206 199 191 184 57 Humboldt R at Palisade APR-JUL 465 427 600 517 415 347 109 JUN-JUL 195 336 252 217 174 145 58 LOWER HUMBOLDT RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Rock Ck nr Battle Mountain APR-JUL 46 754 73 56 37 25 6.1 JUN-JUL 3.0 556 5.9 4.1 2.1 1.07 0.54 Humboldt R at Comus APR-JUL 350 443 489 403 300 234 79 JUN-JUL 171 417 232 194 149 119 41 L Humboldt R nr Paradise Valley (2) APR-JUL 22 379 26 24 20 18.2 5.8 JUN-JUL 1.60 3.1 2.2 0.98 0.074 Martin Ck nr Paradise Valley APR-JUL 37 343 41 39 35 33 10.8 JUN-JUL 7.0 292 9.7 8.1 5.9 4.3 2.4 Humboldt R nr Imlay APR-JUL 280 538 431 337 228 162 52 JUN-JUL 185 881 255 212 160 126 21 SNAKE RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Jarbidge River Below Jarbidge JUN-JUL 11.4 128 15.5 13.1 9.8 7.4 8.9 JUN-SEP 12.2 128 16.3 13.9 10.6 8.1 9.5 Bruneau R at Rowland JUN-JUL 15.5 150 23 18.5 12.5 8.2 10.3 JUN-SEP 17.1 149 25 20 14.0 9.4 11.5 Salmon Falls Ck nr San Jacinto JUN-JUL 28 188 39 32 24 18.5 14.9 JUN-SEP 32 180 43 36 28 22 17.8 EASTERN NEVADA 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Kingston Ck nr Austin APR-JUL 6.3 354 8.0 7.0 5.7 4.8 1.78 JUN-JUL 3.1 310 4.4 3.6 2.7 2.1 1.00 Lehman Ck nr Baker APR-JUL 3.8 191 5.1 4.3 3.3 2.5 1.99 JUN-JUL 2.8 185 3.7 3.2 2.4 1.88 1.51 Cleve Ck nr Ely APR-JUL 7.7 285 10.0 8.6 6.9 5.7 2.7 JUN-JUL 3.4 293 4.4 3.8 3.0 2.5 1.16 Steptoe Ck nr Ely APR-JUL 4.2 309 5.5 4.7 3.7 3.1 1.36 JUN-JUL 2.3 315 2.9 2.5 2.1 1.74 0.73 COLORADO BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Virgin R nr Hurricane APR-JUL 142 458 148 144 140 136 31 JUN-JUL 23 247 29 25 21 17.1 9.3 Virgin R at Littlefield APR-JUL 144 438 152 147 141 136 33 JUN-JUL 27 250 35 30 24 18.9 10.8 Lake Powell Inflow (2) APR-JUL 10200 166 11200 10600 9860 9360 6130 JUN-JUL 4300 128 5260 4680 3940 3440 3370 Max (10%), 30%, 50%, 70% and Min (90%) chance that actual volume will exceed forecast. Medians are for the 1991-2020 period. All volumes are in thousands of acre-feet. footnotes: 1) Max and Min are 5% and 95% chance that actual volume will exceed forecast 2) streamflow is adjusted for upstream storage * These forecasts are coordinated. Hydrologists with the NRCS and National Weather Service California Nevada River Forecast Center (CNRFC) coordinate Lake Tahoe Rise, Truckee River at Farad, Little Truckee River above Boca, and the Carson River near Ft. Churchill using output of their respective hydrology models at the request of the Bureau of Reclamation. The NRCS model is a statistical model based on the current data as of the first of each month. The CNRFC ensemble forecasting system incorporates near-term weather prediction and climatology into their model. These models can provide different answers because of the nature of the model systems, and from the inclusion of future weather in the CNRFC model. The hydrologists agree on forecast values using guidance from both models to best provide an accurate water supply forecast for these points.