Streamflow
All the following yields are based on the fifty percent chance April
through September yield. Yield for the North Platte River near Northgate
is expected to be about 156,000 acre-feet (58 percent of average).
Encampment River near Encampment is estimated to yield 63,000 acre-feet (40
percent of normal). North Platte River near Sinclair will yield about
358,000 acre-feet (50 percent of normal). Rock Creek near Arlington is
estimated to yield 44,000 acre-feet (79 percent of average). Medicine Bow
River above Seminoe Reservoir is expected to yield about 57,000 acre-feet
(45 percent of normal). Seminoe Reservoir inflow should be about (423,000
acre-feet (50 percent of normal). See the following table for more
detailed information on projected runoff.
================================================================================================================================== UPPER NORTH PLATTE RIVER BASIN Streamflow Forecasts - March 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 APR-SEP 159 228 | 275 102 | 322 391 271 | | Encampment River nr Encampment APR-SEP 81 107 | 125 80 | 143 169 156 | | North Platte River nr Sinclair APR-SEP 368 542 | 660 92 | 778 952 719 | | Rock Creek nr Arlington APR-SEP 33 43 | 50 89 | 58 70 56 | | Medicine Bow River ab Seminoe Reserv APR-SEP 26 54 | 80 63 | 110 164 127 | | Seminoe Reservoir inflow APR-JUL 395 574 | 695 88 | 816 995 788 APR-SEP 421 614 | 745 88 | 876 1069 851 | | ================================================================================================================================== UPPER NORTH PLATTE RIVER BASIN | UPPER NORTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) - End of February | Watershed Snowpack Analysis - March 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 1016.7 798.2 705.2 409.0 | N PLATTE above Northgate 8 107 104 | | ENCAMPMENT RIVER 4 88 83 | | BRUSH CREEK 5 76 85 | | MEDICINE BOW & ROCK CREEK 3 75 70 | | N PLATTE above Seminoe 20 90 90 | ================================================================================================================================== * 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.