Projected elevation from March 14 to April 8. Historical Avg shows the typical drop based on similar years. Current Trend shows what happens if the current weekly rate continues.
Based on 8 similar historical years starting near this elevation on March 14
Projection based on historical years with similar peak snowpack percentage. Shows expected elevation gain during the runoff season (April-August).
Based on 1 historical years with similar snowpack
Historical SWE trends for Upper Colorado. Current year shown in black.
Statistical shading percentiles are calculated from period of record (POR) data, excluding the current water year. Percentile categories range from: minimum to 10th percentile, 10th-30th, 30th-70th, 70th-90th, and 90th-maximum.
Each band shows 15 feet of elevation. Width indicates storage capacity—the lake is V-shaped, so higher elevations hold significantly more water per foot.
Average snowpack percentage for each major tributary that feeds into Lake Powell