Precipitation.
Reservoir.
Streamflow.
The most probable, 50 percent chance, April through September runoff yield
forecast is below average for the basin. The Snake near Moran is expected
to yield 710,000 acre-feet (82 percent of normal). Yield from the Snake
River above Palisades Reservoir is estimated to be 2,138,000 acre-feet (80
percent of normal). The 50 percent chance yield near Heise is expected to
be 3,170,000 acre-feet (78 percent of normal). Pacific Creek at Moran is
expected to yield about 130,000 acre-feet (78 percent of average). Greys
River above Palisades Reservoir is estimated to yield 295,000 acre-feet (76
percent of normal). Salt River near Etna is estimated to have a yield of
310,000 acre-feet (78 percent of normal).
================================================================================================================================== SNAKE 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) ====================================================================|=======================|===================================== SNAKE near Moran (1,2) APR-SEP 519 650 | 710 82 | 770 901 869 | | SNAKE above Palisades (2) APR-SEP 1703 1962 | 2138 80 | 2314 2573 2671 | | SNAKE near Heise (2) APR-SEP 2419 2866 | 3170 78 | 3474 3921 4049 | | PACIFIC CREEK at Moran APR-SEP 96 116 | 130 78 | 144 164 166 | | GREYS above Palisades APR-SEP 209 260 | 295 76 | 330 381 388 | | SALT near Etna APR-SEP 196 264 | 310 78 | 356 424 399 | | ================================================================================================================================== SNAKE RIVER BASIN | SNAKE 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 ========================================================================|========================================================= GRASSY LAKE 15.2 12.4 12.9 10.8 | SNAKE above Jackson Lake 9 65 76 | JACKSON LAKE 847.0 645.0 606.9 479.6 | PACIFIC CREEK 3 67 83 | PALISADES 1400.0 1232.2 1196.0 1044.0 | GROS VENTRE RIVER 3 67 69 | | HOBACK RIVER 6 83 79 | | GREYS RIVER 4 92 86 | | SALT RIVER 5 92 88 | | SNAKE above Palisades 30 74 80 | ================================================================================================================================== * 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.