Precipitation
Reservoir
Streamflow
The fifty-percent chance April through July runoff in the Upper Green River
basin is forecast above average. Green River at Warren Bridge is expected
to yield about 310,000 acre-feet (117 percent of normal). Pine Creek above
Fremont Lake is expected to yield 115,000 acre-feet (111 percent of normal).
New Fork River near Big Piney is expected to yield about 450,000 acre-feet
(117 percent of normal). Big Sandy near Farson is expected to be about
65,000 acre-feet (114 percent of normal).
================================================================================================================================== UPPER GREEN RIVER BASIN Streamflow Forecasts - June 1, 1999 ================================================================================================================================== | <<====== 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 at Warren Bridge APR-JUL 275 296 | 310 117 | 324 345 266 | | Pine Creek abv Fremont Lake APR-JUL 102 110 | 115 111 | 120 128 104 JUN-JUL 79 89 | 95 112 | 102 111 85 | | New Fork River nr Big Piney APR-JUL 385 424 | 450 117 | 476 515 385 | | Fontenelle Reservoir Inflow APR-JUL 960 1042 | 1100 130 | 1159 1250 849 | | Big Sandy River nr Farson APR-JUL 57 62 | 65 114 | 68 73 57 | | ================================================================================================================================== UPPER GREEN RIVER BASIN | UPPER GREEN RIVER BASIN Reservoir Storage (1000 AF) - End of May | Watershed Snowpack Analysis - June 1, 1999 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= BIG SANDY 38.3 40.3 30.9 28.3 | GREEN above Warren Bridge 4 440 220 | EDEN 11.8 8.5 5.7 7.8 | UPPER GREEN (West Side) 5 220 140 | FLAMING GORGE NO REPORT | NEWFORK RIVER 2 0 111 | FONTENELLE 344.8 206.0 180.8 195.5 | BIG SANDY/EDEN VALLEY 1 0 0 | | GREEN above Fontenelle 11 247 146 | ================================================================================================================================== * 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.