Writing and Data Analysis.

Projected Lake Powell storage and elevation through July 31 using Colorado Basin River Forecast Center ESP and official forecast percentiles.

Projected Lake Powell storage using historical year analog inflows, fixed release targets, and optional temperature adjustment.

Snow water equivalent in the Upper Colorado River Basin by water-year day.

Average temperature in the Upper Colorado River Basin by water-year day.

Precipitation in the Upper Colorado River Basin by water-year day.

Click a sub-basin in the map to load that basin's SNOTEL snow water equivalent time series in the chart below. How To Use This Chart Sub-basin map The map shows...

Upper Colorado SNODAS SWE map with water-year switching, a date slider, and selectable HUC6 sub-basins.

NOAA 6-10 day temperature outlook map using the latest local forecast shapefile bundle.

Complete-water-year Apr 1 to Jul 31 Lake Powell unregulated inflow totals by water year.

Monthly summed inflow overlays by water year for Lake Powell (actual first, with unregulated toggle ready).

Water-year overlay analysis for Lake Powell inflows and releases, starting with cumulative inflow lines for all available years.

Linked Lake Powell storage context and upstream active storage potential, with hover-synced status over the past year.

Linked Lake Mead storage context with Lake Powell and principal upstream reservoir active storage potential over the past year.

Mapping Lake Powell elevation to storage and surface area.

Monthly Glen Canyon Dam power generation from the U.S. Energy Information Administration, with a 12-month rolling average.

Annual power generation comparison for Glen Canyon, Hoover, Flaming Gorge, Navajo, Blue Mesa, Morrow Point, and Crystal from EIA monthly plant data.