Precipitation
Reservoirs
Streamflow
Water supply is estimated to be near normal this year. The following values
reflect the 50 percent chance yields for the April through September runoff
period. In the upper portion of the drainage, Wind River near Dubois is expected
to yield about 94,000 acre feet (about 92 percent of average). The Wind River
above Bull Lake Creek is expected to yield 515,000 acre feet (96 percent of
average). Wind River at Riverton will yield about 615,000 acre feet (95 percent
of average). Wind River below Boysen will yield about 755,000 acre feet (93
percent of normal). Bull Lake Creek near Lenore is expected to yield about
175,000 acre feet (96 percent of average). Little Popo Agie River near Lander
is expected to yield about 48,000 acre feet (92 percent of average). South Fork
of Little Wind near Fort Washakie will yield about 75,000 acre feet (93 percent
of average). Little Wind River near Riverton will yield about 290,000 acre feet
(90 percent of average).
================================================================================================================================== WIND 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) ====================================================================|=======================|===================================== WIND RIVER near Dubois APR-SEP 75 86 | 94 92 | 102 113 102 | | WIND RIVER abv Bull Lake Cr (2) APR-SEP 428 480 | 515 96 | 550 602 538 | | WIND RIVER at Riverton (2) APR-SEP 462 553 | 615 95 | 677 768 648 | | WIND RIVER below Boysen (2) APR-SEP 459 635 | 755 93 | 875 1051 809 | | BULL LAKE CREEK near Lenore (2) APR-SEP 138 160 | 175 96 | 190 212 183 | | LITTLE POPO AGIE RIVER near Lander APR-SEP 33 42 | 48 92 | 54 64 52 | | SF LITTLE WIND RIVER nr Fort Washaki APR-SEP 58 68 | 75 93 | 82 92 81 | | LITTLE WIND RIVER near Riverton APR-SEP 163 239 | 290 90 | 341 417 324 | | ================================================================================================================================== WIND RIVER BASIN | WIND 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 ========================================================================|========================================================= BULL LAKE 151.8 94.7 81.4 83.4 | WIND RIVER above Dubios 7 59 92 | BOYSEN 596.0 509.8 456.2 529.3 | LITTLE WIND 2 97 111 | PILOT BUTTE 31.6 21.8 23.5 21.5 | POPO AGIE 7 76 92 | | WIND above Boysen Resv 15 69 94 | ================================================================================================================================== * 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.