Streamflow
The fifty-percent chance April through July runoff in the Upper Green River
basin is forecast below average. Green River at Warren Bridge is expected
to yield about 250,000 acre-feet (94 percent of normal). Pine Creek above
Fremont Lake is expected to yield 100,000 acre-feet (96 percent of normal).
New Fork River near Big Piney is expected to yield about 360,000 acre-feet
(94 percent of normal). Fontenelle Reservoir Inflow is estimated to be
725,000 acre-feet (85 percent of average), and Big Sandy near Farson is
expected to be about 50,000 acre-feet (88 percent of normal).
================================================================================================================================== UPPER GREEN RIVER BASIN Streamflow Forecasts - March 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 at Warren Bridge APR-JUL 191 226 | 250 94 | 274 309 266 | | Pine Creek abv Fremont Lake APR-JUL 84 93 | 100 96 | 107 116 104 | | New Fork River nr Big Piney APR-JUL 254 317 | 360 94 | 403 466 385 | | Fontenelle Reservoir Inflow APR-JUL 552 652 | 725 85 | 802 922 849 | | Big Sandy River nr Farson APR-JUL 33 43 | 50 88 | 57 68 57 | | ================================================================================================================================== UPPER GREEN RIVER BASIN | UPPER GREEN RIVER BASIN Reservoir Storage (1000 AF) - End of February | Watershed Snowpack Analysis - March 1, 2000 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= BIG SANDY NO REPORT | GREEN above Warren Bridge 4 78 88 | EDEN NO REPORT | UPPER GREEN (West Side) 7 80 90 | FLAMING GORGE 3749.0 3208.0 3265.3 --- | NEWFORK RIVER 3 79 88 | FONTENELLE 344.8 130.8 144.8 172.0 | BIG SANDY/EDEN VALLEY 2 73 84 | | GREEN above Fontenelle 14 79 89 | ================================================================================================================================== * 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.