Precipitation
Reservoir
Streamflow
At this time, above average yields are expected over the entire basin during
the April to September forecast period. All the following values are based on
the fifty percent chance probability runoff. The highest forecast is the
Sweetwater Drainage at 219 percent of average (160,000 acre feet). Below
Guernsey, the North Platte River should flow near 169 percent of average
(1,670,000 acre feet). Deer Creek is forecast to flow 70,000 acre feet (180
percent of average). LaPrele Creek should yield 160 percent of average
(40,000 acre feet). North Platte below Glendo should yield about 166 percent
of average (1,600,000 acre feet). Laramie River near Woods should yield
about 180 percent of average (133,000 acre feet). The Little Laramie near
Filmore should flow 90,000 acre feet (141 percent of average).
================================================================================================================================== LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS Streamflow Forecasts - February 1, 1997 ================================================================================================================================== | <<====== 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) ====================================================================|=======================|===================================== SEMINOE RESERVOIR INFLOW APR-JUL 1165 1305 | 1400 175 | 1495 1635 800 | | SWEETWATER RIVER nr Alcova APR-JUL 96 127 | 150 217 | 175 216 69 APR-SEP 131 141 | 160 219 | 179 193 73 | | DEER CREEK at Glenrock APR-SEP 39 58 | 70 180 | 83 101 39 | | LaPRELE CREEK above Reservoir APR-SEP 25 34 | 40 160 | 46 55 25 | | NORTH PLATTE RIVER blw Glendo APR-SEP 1204 | 1600 166 | 2013 963 | | NORTH PLATTE R. blw Guernsey APR-SEP 1256 | 1670 169 | 2097 989 | | LARAMIE RIVER near Woods APR-SEP 127 159 | 180 133 | 201 233 135 | | LITTLE LARAMIE RIVER near Filmore APR-SEP 71 82 | 90 141 | 98 109 64 | | ================================================================================================================================== LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS | LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS Reservoir Storage (1000 AF) - End of January | Watershed Snowpack Analysis - February 1, 1997 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= ALCOVA 184.3 155.8 156.7 156.1 | SWEETWATER 4 151 179 | GLENDO 506.4 315.9 270.1 330.8 | DEER & LaPRELE CREEKS 4 132 175 | GUERNSEY 45.6 15.0 18.2 6.8 | N PLATTE abv Laramie R. 28 129 160 | PATHFINDER 1016.5 861.9 723.9 553.0 | LARAMIE RIVER abv Laramie 8 112 138 | SEMINOE 1016.7 707.3 783.7 467.0 | LITTLE LARAMIE RIVER 4 131 155 | WHEATLAND #2 98.9 51.0 65.0 40.1 | LARAMIE RIVER above mouth 11 119 145 | NORTH PLATTE PROJ 1062.1 764.3 984.2 601.0 | NORTH PLATTE 35 128 158 | KENDRICK PROJECT 1201.7 981.3 654.9 819.1 | | GLENDO PROJECT USERS 183.2 149.6 157.6 119.8 | | ================================================================================================================================== * 90%, 70%, 30%, and 10% chances of exceeding are the probabilities that the actual flow will exceed the volumes in the table. The average is computed for the 1961-1990 base period.