Precipitation
Reservoir
Streamflow
The upper Bear River drainage is expected to have much below average runoff
this spring. The following 50 percent chance stream flow yields are for the
April through September period. Smiths Fork near Border is estimated to
yield 47,000 acre-feet (43 percent of normal), and Thomas Fork drainage near
the Idaho-Wyoming state line is estimated to yield 6,000 acre-feet or 20
percent of normal. Bear River near the Utah-Wyoming State Line is expected
to yield about 60,000 acre feet (48 percent of average), The Bear River near
Woodruff is expected to yield about 68,000 acre-feet (about 44 percent of
normal).
================================================================================================================================== UPPER BEAR RIVER BASIN Streamflow Forecasts - May 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) ====================================================================|=======================|===================================== SMITHS FK nr Border, WY MAY-SEP 37 43 | 47 43 | 52 60 109 | | THOMAS FK nr WY-ID State Line (Disc. MAY-SEP 3.8 5.0 | 6.0 20 | 7.2 9.4 30 | | Bear R nr UT-WY State Line APR-SEP 53 57 | 60 48 | 63 68 126 MAY-SEP 50 54 | 57 48 | 60 65 120 | | BEAR R nr Woodruff, UT APR-SEP 44 57 | 68 44 | 81 105 154 MAY-SEP 36 47 | 57 44 | 69 91 131 | | ================================================================================================================================== UPPER BEAR RIVER BASIN | UPPER BEAR RIVER BASIN Reservoir Storage (1000 AF) - End of April | Watershed Snowpack Analysis - May 1, 2001 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= WOODRUFF NARROWS 57.3 21.5 57.3 --- | UPPER BEAR RIVER in Utah 7 96 56 | | SMITHS & THOMAS FORKS 4 79 49 | | BEAR RIVER abv ID line 9 88 49 | | NORTHWEST 70 79 50 | | NORTHEST 17 75 56 | | SOUTHEAST 35 100 74 | | SOUTHWEST 35 95 59 | ================================================================================================================================== * 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 l