Precipitation
Reservoir
Streamflow
The 50 percent chance stream flow yields are expected to be near average in
the Bear River drainage. The Bear River near the Utah-Wyoming State Line is
expected to yield about 93,000 acre feet; that is 111 percent of average for
the June through September period. Thomas Fork drainage is estimated to
yield 32,000 acre-feet or 107 percent of normal for the May-September
period. The 50 percent chance yield for Smiths Fork near Border is about
120,000 acre-feet (108 percent of normal) for the May-September period. The
Bear River near Woodruff is expected to yield about 86,000 acre-feet, about
112 percent of normal for the June-September period.
================================================================================================================================== UPPER BEAR 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) ====================================================================|=======================|===================================== SMITHS FK nr Border, WY MAY-SEP 95 109 | 120 110 | 132 152 109 | | THOMAS FK nr WY-ID State Line (Disc. MAY-SEP 20 27 | 32 107 | 38 50 30 | | Bear R nr UT-WY State Line APR-SEP 116 124 | 130 103 | 136 146 126 JUN-SEP 71 83 | 93 111 | 104 122 84 | | BEAR R nr Woodruff, UT JUN-SEP 48 68 | 86 112 | 109 153 77 | | ================================================================================================================================== UPPER BEAR RIVER BASIN | UPPER BEAR 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 ========================================================================|========================================================= WOODRUFF NARROWS NO REPORT | UPPER BEAR RIVER in Utah 3 149 119 | | SMITHS & THOMAS FORKS 3 199 157 | | BEAR RIVER abv ID line 6 198 146 | ================================================================================================================================== * 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.