Powered byTERRA 2100Colorado River
One operational view from the Rocky Mountain headwaters to Grand Canyon, connected to the basin's tributaries, storage, snow supply and forecasts.
- Live network
- Reading USGS...
- Main stem
- 9 selected stations
- Storage record
- 1937-present
- Updated
- Connecting...
Headwaters to Grand Canyon
Circle size follows discharge. Elevation is the station datum, and the horizontal sequence follows the river downstream.
Lees Ferry
Colorado River at Lees Ferry, AZ
Major tributary outlets
These gauges do not sum neatly to main-stem flow. Reservoir operations, travel time, diversions and ungauged water separate each observation.
The reservoir buffer
Observed end-of-year storage since 2000, with the latest 2026 daily value. Capacity percentages use the published maximum storage values represented by these records.
Snow, operations and forecasts
A river reading says what is passing now. These official systems explain the water still stored as snow, the releases shaping the hydrograph and the range expected next.
Station and basin snow water equivalent, with percent of median and peak timing.
Open current reportBureau of ReclamationReservoir operationsCurrent storage, pool elevation, inflow and release across the Upper Colorado Basin.
Open status mapNOAA CBRFCWater supply forecastOfficial seasonal volume forecasts, observations and historical comparison.
Open forecast mapNOAA NWPSStage and flow outlookOfficial river observations, flood thresholds and forecast hydrographs where available.
Open prediction serviceUse the underlying data
RiverData keeps the river view readable while retaining direct paths to each publisher, API and local reservoir snapshot.
Location, elevation, drainage area and datum
API / GeoJSON
Open sourceStorage, elevation, inflow and release
Operational table
Open sourceReservoir conditions and river flows, 7 days
JSON
Open sourceStation and basin snow water equivalent
Report / tabular data
Open sourceSeasonal volumes and percent normal
Interactive data
Open sourceObserved and forecast hydrographs
API / JSON
Open source