April-July runoff forecasts have decreased from those issued last month. Runoff volumes from 60 to 90 percent of the 1961-90 average are expected in the Great Salt Lake Basin, and 35 to 55 percent of average in the Sevier Lake Basin. March was characterized by dry, warm conditions, a depletion of the snowpack in the Sevier Lake Basin to record low levels, and minimal additional snow accumulation in the Great Salt Lake Basin. As a result the onset of spring runoff was early in many areas. April 1 snowpack in the Sevier Lake Basin ranges from 0 to 60 percent of average, existing only at the highest elevations, and in the Great Salt Lake Basin ranges from 50 to 90 percent.
