USDA NRCS National Water & Climate Center * - DATA CURRENT AS OF: April 03, 2024 04:05:26 PM - Based on April 01, 2024 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 0.60 150 1.06 0.78 0.42 0.140 0.40 Lake Tahoe Rise Gates Closed (ft) (2)* APR-HIGH 1.40 121 1.87 1.65 1.20 1.00 1.16 Lk Tahoe Net Inflow APR-JUL 115 114 183 142 88 47 101 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 17.0 113 22 18.9 15.1 12.4 15.0 Martis Ck Res Inflow (2) APR-JUL 7.9 139 11.4 9.3 6.5 4.4 5.7 Prosser Ck Res Inflow (2) APR-JUL 42 120 50 45 39 34 35 Independence Lk Inflow (2) APR-JUL 10.4 99 12.5 11.2 9.6 8.3 10.5 Sagehen Ck nr Truckee APR-JUL 5.0 122 6.6 5.6 4.4 3.4 4.1 Stampede Res Local Inflow (2) APR-JUL 70 119 89 78 62 51 59 L Truckee R ab Boca Reservoir (2)* APR-JUL 90 125 110 99 83 72 72 Boca Res Local Inflow (2) APR-JUL 3.0 197 6.5 4.4 1.59 1.20 1.52 Truckee R ab Farad Sidewater (2) APR-JUL 113 126 138 123 103 88 90 Truckee R at Farad (2)* APR-JUL 275 122 320 295 255 225 225 Galena Ck at Galena Ck State Pk APR-JUL 4.5 113 5.8 5.0 4.0 3.2 4.0 Steamboat Ck at Steamboat APR-JUL 4.5 214 9.8 6.4 2.9 1.25 2.1 Pyramid Lk Elevation Change (ft) LOW-HIGH 1.15 2.8 1.81 0.49 -0.49 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 174 106 213 190 158 135 164 Date of 200 cfs flow (julian_day) 200 cfs Jul 10 Jul 25 Jul 16 Jul 04 Jun 25 Jul 14 Date of 500 cfs flow (julian_day) 500 cfs Jun 16 Jul 07 Jun 24 Jun 08 May 26 Jun 20 WF Carson R nr Woodfords APR-JUL 56 124 68 61 51 44 45 Carson R nr Carson City APR-JUL 165 124 219 187 143 111 133 Marlette Lake Inflow APR-JUL 0.60 150 1.06 0.78 0.42 0.140 0.40 Kings Canyon Ck nr Carson City APR-JUL 0.160 123 0.31 0.22 0.110 0.060 0.130 Ash Canyon Ck nr Carson City APR-JUL 1.00 122 1.34 1.13 0.88 0.71 0.82 Carson R at Ft Churchill* APR-JUL 165 126 230 195 150 130 131 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 49 111 73 59 39 25 44 W Walker R bl L Walker nr Coleville APR-JUL 158 103 191 171 145 125 153 W Walker R nr Coleville APR-JUL 151 103 181 163 139 121 147 Walker Lake Elevation Change (ft) LOW-HIGH 2.1 4.6 3.1 1.07 -0.44 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 15.0 205 21 17.3 12.9 10.0 7.3 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 52 200 65 57 47 39 26 Lamoille Ck nr Lamoille APR-JUL 40 154 50 44 36 30 26 NF Humboldt R at Devils Gate APR-JUL 68 378 88 76 60 48 18.0 Humboldt R nr Elko APR-JUL 240 348 312 269 211 168 69 SF Humboldt R ab Dixie Ck APR-JUL 130 255 167 145 115 93 51 SF Humboldt R abv Tenmile Ck nr Elko APR-JUL 135 260 168 149 121 102 52 Humboldt R nr Carlin APR-JUL 370 370 503 421 322 257 100 Humboldt R at Palisade APR-JUL 420 385 569 477 366 294 109 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 39 639 63 48 31 21 6.1 Humboldt R at Comus APR-JUL 360 456 495 412 311 246 79 L Humboldt R nr Paradise Valley (2) APR-JUL 14.0 241 20 16.4 11.6 8.0 5.8 Martin Ck nr Paradise Valley APR-JUL 26 241 34 29 23 17.7 10.8 Humboldt R nr Imlay APR-JUL 275 529 404 324 230 171 52 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 APR-JUL 31 158 37 33 29 25 19.6 APR-SEP 31 155 37 33 29 25 20 Bruneau R at Rowland APR-JUL 90 188 113 99 81 67 48 APR-SEP 92 188 115 101 83 69 49 Salmon Falls Ck nr San Jacinto APR-JUL 110 196 148 125 97 78 56 APR-SEP 114 197 152 129 100 81 58 OYWHEE RIVER BASIN 50% % of max 30% 70% min 30-yr Forecast Point period (KAF) med (KAF) (KAF) (KAF) (KAF) med -------------- ------ ----- ---- ----- ----- ----- ----- ----- Owyhee R nr Gold Ck (2) APR-JUL 48 279 69 56 41 31 17.2 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 4.0 225 6.1 4.8 3.3 2.4 1.78 Lehman Ck nr Baker APR-JUL 2.9 146 4.2 3.4 2.4 1.58 1.99 Cleve Ck nr Ely APR-JUL 4.2 156 6.2 5.0 3.5 2.6 2.7 Steptoe Ck nr Ely APR-JUL 2.2 162 3.2 2.6 1.85 1.40 1.36 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 34 110 56 43 26 17.7 31 Virgin R at Littlefield APR-JUL 36 109 59 46 28 19.0 33 Lake Powell Inflow (2) APR-JUL 6300 103 8800 7260 5410 4210 6130 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.