Charts.

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

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

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

Scatter relationships between Upper Colorado climate indicators and Lake Powell inflow, plus water-year overlays of basin snowpack and rolling unregulated inflow.

Snow water equivalent 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...

Station-level snowpack profiles by elevation for the Upper Colorado River Basin.

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

Clickable upper basin stream-gauge explorer with cumulative, daily, and rolling water-year flow views.

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

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).

Projected Lake Powell storage from CBRFC forecast guidance through July 31, with a continuation panel that carries selected outcomes forward using observed historical inflow years.

Introduction The goal of this analysis is to project the current conditions of Lake Powell forward through the end of April 2027, which reasonably represents...

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

Mapping Lake Powell elevation to storage and surface area.

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

Monthly and daily Lake Powell bypass release volume from the USBR reservoir record, showing recent outlet-works use outside the normal power-release path.

Mapping Lake Mead elevation to storage and surface area.

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

Water-year framing for Lake Mead elevation and storage, anchored by the full-record synced-axes chart.

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.

Draft water-year analysis for Mono Lake hydrology, operations, and exported water.

Draft map for tuning USGS watershed, lake, and stream geometry around Mono Lake.

Charting Mono Lake elevation, storage, surface area, salinity, and specific gravity from the Mono Basin Research bathymetry table.

Water-year analysis for Lake Powell hydrology and operations.