Daily streamflow on Idaho rivers, 1990–today
Explore decades of USGS daily-mean discharge for six gauges U of I hydrologists study — the Clearwater, Salmon and Snake rivers, plus Paradise Creek on the Moscow campus. Compare any water year against the full historical record.
How to use: pick a gauge on the map (dots are numbered to match the list) → drag across the chart to zoom in → hover the spaghetti chart to compare years → click a year in the peak-flow table to zoom the charts to that water year. Hold Shift and drag (or use a horizontal scroll) to pan; pinch or Ctrl/⌘ + scroll to zoom; double-click to reset the view. The ‹ › buttons and the ← → arrow keys (with the chart focused) also pan the view.
Choose a gauge
Drag to zoom · hold Shift and drag (or horizontal scroll) to pan · pinch or Ctrl/⌘ + scroll to zoom · double-click to reset. The ‹ › buttons and the ← → arrow keys (with the chart focused) pan the view; +/− zoom. In the Year over year chart below, each faint line is one water year (Oct 1 – Sep 30); the bold line is the selected year.
Data & sources
All values are real USGS daily-mean discharge (parameter 00060, statistic 00003),
downloaded September 13, 2026 from the USGS Water Services daily-values API
(waterservices.usgs.gov/nwis/dv). USGS data are U.S. public domain.
Recent values carry qualifier P (provisional, subject to revision).
No numbers in this app are synthetic.
State outline: U.S. Census Bureau, TIGERweb State_County layer (public domain). Suggested citation: U.S. Geological Survey, 2026, National Water Information System data available on the World Wide Web (USGS Water Data for the Nation), accessed September 13, 2026, at waterdata.usgs.gov/nwis.