Precipitation
Reservoir
Streamflow
Expected yields vary from 62 to 80 percent of average across the
basin. The following forecast values are based on a 50 percent
chance probability for the April through July forecast period. Green
River near Green River is forecast to yield about 665,000-acre feet
(74 percent of average). East Fork of Smiths Fork near Robertson is
estimated to yield 23,000 acre-feet (77 percent of average). The
estimated yield for Hams Fork near Frontier is 45,000-acre feet (68
percent of average). Viva Naughton Reservoir inflow will be about
55,000-acre feet (62 percent of average).
================================================================================================================================== LOWER GREEN RIVER BASIN Streamflow Forecasts - February 1, 2000 ================================================================================================================================== | <<====== Drier ====== Future Conditions ======= Wetter =====>> | | | Forecast Point Forecast | ==================== Chance Of Exceeding * ====================== | Period | 90% 70% | 50% (Most Probable) | 30% 10% | 30-Yr Avg. | (1000AF) (1000AF) | (1000AF) (% AVG.) | (1000AF) (1000AF) | (1000AF) ====================================================================|=======================|===================================== Green River nr Green River, WY APR-JUL 378 559 | 665 74 | 771 953 899 | | Blacks Fork nr Robertson APR-JUL 46 64 | 76 80 | 88 106 95 | | EF of Smiths Fork nr Robertson APR-JUL 17.2 20 | 23 77 | 26 31 30 | | Hams Fk blw Pole Ck nr Frontier APR-JUL 25 36 | 45 68 | 55 70 66 | | Hams Fk Inflow to Viva Naughton Res APR-JUL 17.6 40 | 55 62 | 70 92 89 | | Flaming Gorge Reservoir Inflow APR-JUL 454 752 | 900 75 | 1048 1351 1196 | | ================================================================================================================================== LOWER GREEN RIVER BASIN | LOWER GREEN RIVER BASIN Reservoir Storage (1000 AF) - End of January | Watershed Snowpack Analysis - February 1, 2000 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= FONTENELLE 344.8 167.6 180.9 196.2 | HAMS FORK RIVER 4 85 76 | FLAMING GORGE 3749.0 3226.0 3341.0 --- | BLACKS FORK 2 102 92 | VIVA NAUGHTON RES 42.4 35.7 31.4 28.7 | HENRYS FORK 2 82 100 | | GREEN above Flaming Gorge 22 86 81 | ================================================================================================================================== * 90%, 70%, 30%, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table. The average is computed for the 1961-1990 base period. (1) - The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels. (2) - The value is natural volume - actual volume may be affected by upstream water management.