Precipitation across the basin was much above average last month. Togwotee Pass was the lowest reporting site with 197 percent of average for December. December precipitation for the basin was 249 percent of average. Water year to date precipitation is 66 percent above normal for the Snake River basin. Grassy Lake is about 1 percent below last years storage amount, while Jackson Lake is 2 percent more and Palisades Reservoir is 10 percent less than last year at this time.
Stream flow is forecast to be much above average for the basin.
The 50 percent chance yields for the April to September period are forecast to be 36 to 51 percent above normal in the Snake River basin. The average is computed for the 1961-1990 base period.