Streamflow Map
Rivers across the U.S. colored by modeled discharge (CFS) from the NOAA National Water Model. Amber markers are USACE dams linked to lake release pages.
Stream lines update hourly via NOAA NWS. Always verify conditions before you go.
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How to read this map
- Colored rivers — NOAA NWM modeled CFS. Pale blue is lower flow; dark blue is higher.
- Amber pins — USACE dams with live outflow CFS when available; tap to open the lake page.
Flow rate guide (CFS)
Same colors as Modeled CFS on the map, through dark blue.
0–250CFS
Low flow
Small creeks and low modeled discharge.
250–2.5kCFS
Typical rivers
Common range for many rivers and tailwaters.
2.5k–5kCFS
Larger rivers
Pushier current.
5k–10kCFS
Big water
Strong modeled flow.
10k–25kCFS
Major rivers
Large main stems. Dark blue.