Precipitation
Reservoirs
Streamflow
Water supply is estimated to be much below normal this year. Irrigation water shortages can be expected in this drainage
basin. The following values reflect the 50 percent chance yields for the June through September runoff period. The
Wind River above Bull Lake Creek is expected to yield 170,000 acre feet (41 percent of average). Wind River at
Riverton will yield about 100,000 acre feet (20 percent of average). Boysen Reservoir inflow will yield about 175,000
acre feet (29 percent of normal). Bull Lake Creek near Lenore is expected to yield about 55,000 acre feet (36 percent
of average). Little Popo Agie River near Lander is expected to yield about 6,500 acre feet (18 percent of average).
South Fork of Little Wind near Fort Washakie will yield about 20,000 acre feet (32 percent of average). Little Wind
River near Riverton will yield about 45,000 acre feet (19 percent of average).
================================================================================================================================== WIND RIVER BASIN Streamflow Forecasts - June 1, 2001 ================================================================================================================================== | <<====== 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 abv Bull Lake Cr (2) JUN-SEP 155 164 | 170 41 | 185 206 420 | | WIND RIVER at Riverton (2) JUN-SEP 76 90 | 100 20 | 149 220 505 | | BOYSEN RESERVOIR Inflow (2) JUN-SEP 115 151 | 175 29 | 259 382 609 | | BULL LAKE CR near Lenore (2) JUN-SEP 50 53 | 55 36 | 61 70 154 | | LT POPO AGIE RIVER nr Lander JUN-SEP 5.7 6.2 | 6.5 18 | 8.4 11.2 37 | | SF LT WIND nr Fort Washakie JUN-SEP 17.8 19.1 | 20 32 | 23 27 63 | | LT WIND RIVER nr Riverton JUN-SEP 38 42 | 45 19 | 60 83 241 | | ================================================================================================================================== WIND RIVER BASIN | WIND RIVER BASIN Reservoir Storage (1000 AF) - End of May | Watershed Snowpack Analysis - June 1, 2001 ================================================================================================================================== 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 79.5 112.9 92.7 | WIND RIVER above Dubios 3 0 0 | BOYSEN 596.0 413.9 542.9 546.4 | LITTLE WIND 2 0 0 | PILOT BUTTE 31.6 14.7 24.5 25.5 | POPO AGIE 3 0 0 | | WIND above Boysen Resv 7 0 0 | ================================================================================================================================== * 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.