This chart reduces each complete Lake Powell water year to one number: total unregulated inflow from April 1 through July 31. That isolates the core runoff window and makes it easier to compare how big each snowmelt season actually was.
How to read this chart
Each point is one complete water year. The y-axis is total April 1 to July 31 unregulated inflow in million acre-feet, and the x-axis is water year. The dashed guides show the all-years median and the trailing 10-year average. Hover to inspect a specific year.
Apr 1 to Jul 31 Unregulated Inflow by Water Year
Monthly Mar to Aug Unregulated Inflow by Water Year
Data Source
- Local derived Lake Powell water-year file built from daily USBR Hydrodata, using only complete water years with full Apr 1 to Jul 31 coverage for
unregulated_inflow_volume.1
- 1
Local water-year dataset - lake-powell-water-year.json. ↩︎