Precipitation
Reservoirs
Streamflow
All the following yields are based on the fifty percent chance June through
September yield. Yield for the North Platte River near Northgate is
expected to be about 120,000 acre-feet (76 percent of average). Encampment
River near Encampment is estimated to yield 73,000 acre-feet (71 percent of
normal). North Platte River near Sinclair will yield about 315,000 acre-
feet (73 percent of normal). Rock Creek near Arlington is estimated to
yield 17,600 acre-feet (42 percent of average). Medicine Bow River above
Seminoe Reservoir is expected to yield about 25,000 acre-feet (39 percent
of normal). Seminoe Reservoir inflow should be about (340,000 acre-feet
(69 percent of normal). See the following table for more detailed
information on projected runoff.
================================================================================================================================== UPPER NORTH PLATTE RIVER BASIN Streamflow Forecasts - June 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) ====================================================================|=======================|===================================== North Platte River nr Northgate JUN-SEP 87 107 | 120 76 | 133 152 158 | | Encampment River nr Encampment JUN-SEP 42 60 | 73 71 | 86 104 103 | | North Platte River nr Sinclair JUN-SEP 208 272 | 315 73 | 358 422 431 | | Rock Creek nr Arlington JUN-SEP 15.0 16.5 | 17.6 42 | 18.7 21 42 | | Medicine Bow River ab Seminoe Reserv JUN-SEP 13.5 19.9 | 25 39 | 31 40 64 | | Seminoe Reservoir inflow JUN-JUL 184 247 | 290 68 | 333 394 428 JUN-SEP 166 270 | 340 69 | 410 514 491 | | ================================================================================================================================== UPPER NORTH PLATTE RIVER BASIN | UPPER NORTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) - End of May | Watershed Snowpack Analysis - June 1, 2000 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= SEMINOE 1016.7 914.2 842.9 551.0 | N PLATTE above Northgate 5 43 43 | | ENCAMPMENT RIVER 3 23 29 | | BRUSH CREEK 2 23 43 | | MEDICINE BOW & ROCK CREEK 2 19 30 | | N PLATTE above Seminoe 13 28 36 | ================================================================================================================================== * 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.