Precipitation
Reservoir
Streamflow
Expected yields vary for 80 to 113 percent of average across the basin.
The following forecast values are based on a 50 percent chance probability
for the April to July forecast period. Green River near Green River is
forecast to yield 715,000 acre feet (80 percent of average). Meeks Cabin
Reservoir inflow is estimated to flow 100,000 acre feet (104 percent of
average). Yield for the State Line Reservoir inflow will be about 34,000
acre feet (113 percent of average). The estimated yield for Hams Fork near
Frontier is 55,000 acre feet (83 percent of average). Viva Naughton
Reservoir inflow will be about 75,000 acre feet (81 percent of average).
Flaming Gorge Reservoir inflow should be near 1,000,000 acre feet (84
percent of average).
================================================================================================================================== LOWER GREEN RIVER BASIN Streamflow Forecasts - April 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 571 657 | 715 80 | 773 859 899 | | MEEKS CABIN RESERVOIR Inflow APR-JUL 86 94 | 100 104 | 106 114 96 | | STATE LINE RESERVOIR INFLOW APR-JUL 25 31 | 34 113 | 38 43 30 | | HAMS FORK nr Frontier APR-JUL 38 48 | 55 83 | 62 72 66 | | VIVA NAUGHTON RES inflow APR-JUL 52 66 | 75 81 | 84 98 93 | | FLAMING GORGE RES INFLOW APR-JUL | 1000 84 | 1196 | | ================================================================================================================================== LOWER GREEN RIVER BASIN | LOWER GREEN RIVER BASIN Reservoir Storage (1000 AF) - End of March | Watershed Snowpack Analysis - April 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 344.8 115.6 120.8 157.9 | HAMS FORK RIVER 4 65 87 | FLAMING GORGE 3749.0 3235.0 3184.9 --- | BLACKS FORK 5 112 107 | VIVA NAUGHTON RES NO REPORT | HENRYS FORK 3 138 134 | | GREEN above Flaming Gorge 26 71 93 | ================================================================================================================================== * 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.