Precipitation
Precipitation across the basin was above average this past month. February
precipitation was 125 percent of average (68 percent of last year) for the
5 reporting stations. February precipitation ranged from 104 to 163
percent of average. The Little Snake River basin water-year-to-date
precipitation is currently 81 percent of average (90 percent of last year).
Year-to-date percentages range from 75 to 90 percent of average.
Streamflow
Runoff yield in the Little Snake River drainage is expected to be below
normal this year. Stream yield is based on the 50 percent probability for
the April through July forecast period. The Little Snake River near Slater
should yield about 117,000 acre-feet (76 percent of normal). Little Snake
River near Dixon is estimated to yield 240,000 acre-feet (73 percent of
normal).
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LITTLE SNAKE RIVER BASIN
Streamflow Forecasts - March 1, 2001
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| <<====== 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)
====================================================================|=======================|=====================================
Little Snake River nr Slater APR-JUL 71 97 | 117 76 | 139 174 155
| |
LITTLE SNAKE R nr Dixon APR-JUL 128 195 | 240 73 | 285 352 329
| |
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LITTLE SNAKE RIVER BASIN | LITTLE SNAKE RIVER BASIN
Reservoir Storage (1000 AF) - End of February | Watershed Snowpack Analysis - March 1, 2001
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Usable | *** Usable Storage *** | Number This Year as % of
Reservoir Capacity| This Last | Watershed of =================
| Year Year Avg | Data Sites Last Yr Average
========================================================================|=========================================================
| LITTLE SNAKE RIVER 8 88 80
|
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* 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.
To March 2001 Basin Outlook Report Contents Page