FGUS65 KSTR 071955 ESPWY COLORADO BASIN RIVER FORECAST CENTER NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH WATER SUPPLY INFORMATION FOR SOUTHWEST WYOMING AS OF June 7, 2023 PRECIPITATION(% OF AVERAGE) AND SNOWPACK (% OF MEDIAN): SUBBASIN MAY OCT-MAY JUN 1 MAY PRECIP PRECIP SNOW FLOW ---------------------- ------ ------- ----- -------- GREEN ABV FLAMING GORGE 65 105 80 200 BEAR RIVER HEADWATERS 70 115 120 175 PERIOD ENDING: May 31, 2023 Figures are in 1000 Acre Feet C U R R E N T Y R L A S T Y R Usable EOM Usable % of EOM Usable % of Capacity Contents Capacity Contents Capacity --------------------------------------------------------------------------------- GREEN - FONTENELLE RE| 334.0| 249.9| 75|| 158.3| 47| BIG SANDY - BIG SANDY| 38.3| 36.2| 94|| 17.9| 47| BLACKS FORK - MEEKS C| 29.9| 29.9| 100|| 28.4| 95| EF SMITHS FORK - STAT| 13.9| 14.2| 102|| 12.8| 92| GREEN - FLAMING GORGE| 3749.0| 2917.4| 78|| 2769.2| 74| BEAR - WOODRUFF NARRO| 55.8| 63.4| 114|| 39.0| 70| STREAMFLOW FORECASTS: GREEN RIVER BASIN Period 50% %AVG 10% 30% 70% 90% AVG ------ ---- ---- ---- ---- ---- ---- --- Green River Daniel, nr, Warren Brid Apr-Jul 235 92 270 250 220 205 255 Daniel, nr, Warren Brid Jun-Jul 136 78 171 151 121 106 175 Pine Ck Fremont Lk, abv Apr-Jul 95 94 110 103 85 77 101 Fremont Lk, abv Jun-Jul 64 82 79 72 54 46 78 New Fork River Big Piney, nr Apr-Jul 350 99 425 395 320 300 355 Big Piney, nr Jun-Jul 185 73 260 230 155 135 255 Green River Fontenelle Reservoir, F Apr-Jul 830 113 940 880 740 700 735 Fontenelle Reservoir, F Jun-Jul 430 91 540 480 340 300 475 Big Sandy River Farson, nr Apr-Jul 56 112 67 62 50 45 50 Farson, nr Jun-Jul 30 94 41 36 24.0 19.3 32 Green River Green River, Wy, nr Apr-Jul 850 116 960 920 770 720 735 Green River, Wy, nr Jun-Jul 435 91 545 505 355 305 480 EF Smiths Fork River Stateline Reservoir, Ro Apr-Jul 31 111 35 33 29 27 28 Stateline Reservoir, Ro Jun-Jul 17.0 95 21 19 14.8 12.8 17.9 Blacks Fork River Robertson, nr Apr-Jul 90 102 100 95 85 80 88 Robertson, nr Jun-Jul 46 82 56 51 41 36 56 Hams Fork River Frontier, nr, Pole Ck, Apr-Jul 67 129 75 70 63 60 52 Frontier, nr, Pole Ck, Jun-Jul 27 112 35 30 23.0 19.9 24 Viva Naughton Reservoir Apr-Jul 102 140 115 106 96 90 73 Viva Naughton Reservoir Jun-Jul 33 110 46 37 27 21 30 Green River Flaming Gorge Reservoir Apr-Jul 1280 133 1450 1360 1170 1100 965 Flaming Gorge Reservoir Jun-Jul 570 96 740 650 460 390 595 BEAR RIVER BASIN Period 50% %AVG 10% 30% 70% 90% AVG ------ ---- ---- ---- ---- ---- ---- --- Bear River Utah-Wyoming State Line Apr-Jul 146 134 160 153 143 130 109 Utah-Wyoming State Line Jun-Jul 74 117 88 81 71 58 63 Woodruff Narrows Rsvr, Apr-Jul 188 174 205 194 173 154 108 Woodruff Narrows Rsvr, Jun-Jul 63 124 81 69 48 29 51 Stewart Dam Apr-Jul 310 193 365 345 270 240 161 Stewart Dam Jun-Jul 133 164 187 169 94 64 81 Smiths Fork River Border, nr Apr-Jul 105 119 115 109 101 97 88 Border, nr Jun-Jul 54 110 64 58 50 46 49 50% Volume that has a 50 percent chance of being exceeded (in 1000 acre-feet). %AVG 50% volume in percent of the 1991-2020 average. 10% Volume that has a 10 percent chance of being exceeded. 30% Volume that has a 30 percent chance of being exceeded. 90% Volume that has a 90 percent chance of being exceeded. 70% Volume that has a 70 percent chance of being exceeded. AVG average volume for the 1991-2020 period. All forecast volumes reflect natural flow. Actual observed flow may be affected by upstream water management. CBRFC/Alcorn/Kormos