Streamflow
Expected yields vary from 73 to 89 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 800,000-acre feet (89 percent of
average). The estimated yield for Hams Fork near Frontier is 50,000-
acre feet (76 percent of average). Viva Naughton Reservoir inflow
will be about 65,000-acre feet (73 percent of average).
================================================================================================================================== LOWER GREEN RIVER BASIN Streamflow Forecasts - June 1, 1998 ================================================================================================================================== | <<====== 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 R nr Green River, WY APR-JUL 647 717 | 765 85 | 813 883 899 | | MEEKS CABIN RESERVOIR Inflow APR-JUL 90 98 | 103 107 | 108 116 96 | | STATE LINE RESERVOIR INFLOW APR-JUL 28 31 | 33 110 | 35 38 30 | | HAMS FORK nr Frontier APR-JUL 38 46 | 51 77 | 56 64 66 | | VIVA NAUGHTON RES inflow APR-JUL 47 58 | 66 71 | 74 85 93 | | FLAMING GORGE RES INFLOW APR-JUL | 1100 92 | 1196 | | ================================================================================================================================== LOWER GREEN RIVER BASIN | LOWER GREEN RIVER BASIN Reservoir Storage (1000 AF) - End of May | Watershed Snowpack Analysis - June 1, 1998 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= FONTENELLE 344.8 180.8 212.9 195.5 | HAMS FORK RIVER 3 70 87 | FLAMING GORGE NO REPORT | BLACKS FORK 2 159 122 | VIVA NAUGHTON RES NO REPORT | HENRYS FORK 2 0 0 | | GREEN above Flaming Gorge 17 65 77 | ================================================================================================================================== * 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.