Live streamflow across the country.
Real-time discharge from 10,000+ USGS streamgauges, surging-streamflow ranking, paddle-runnable status, and a daily AI briefing — refreshed throughout the day from USGS and NOAA feeds. Built for paddlers, anglers, water managers, and flood researchers.
What the rivers are running at
An AI-generated summary stitched from today's USGS streamgauge readings, NWS flood watches, and watershed status across the country.
A significant hydrological event is unfolding across the United States, with river systems from the Ohio Valley to the Upper Midwest experiencing dramatically elevated flows. The Ohio River at Old Shawneetown on the Kentucky-Illinois border is leading the nation with an astounding 259,000 cubic feet per second (cfs), while multiple watersheds in Iowa, Kansas, and the Northeast are running at 1,500% to over 6,000% of normal levels. This surge comes as scattered thunderstorms move through the central states and recent heavy precipitation has overwhelmed river systems from Pennsylvania to Texas, creating both opportunities for water managers and challenges for flood-prone communities.
The Midwest is experiencing the most dramatic conditions, with Iowa's river systems particularly swollen. The Des Moines River basin is witnessing extraordinary flows, with the Lower Des Moines watershed at 2,190% of normal and multiple gauges exceeding 15,000 cfs. The Wapsipinicon River near Clinton is flowing at 9,460 cfs—over 1,500% of normal—while the Cedar River system shows similar extreme conditions. Minnesota's river networks are equally impressive, with the Minnesota River recording flows between 9,500-16,900 cfs at multiple locations from Montevideo to Jordan, transforming typically modest streams into roaring waterways. These conditions are impacting major population centers including Des Moines, Minneapolis-St. Paul, and Davenport, where the Mississippi River below Lock & Dam #2 at Hastings measures 27,700 cfs.
The Northeast presents a striking contrast with smaller watersheds showing the most extreme percentage increases. New Jersey's Hackensack-Passaic watershed is running at an incredible 4,305% of normal, while Connecticut's Quinnipiac basin registers 3,088% of normal—turning typically gentle streams into significant torrents. Meanwhile, the Southeast shows a different pattern: Florida's St. Johns River at Jacksonville flows at 152,000 cfs but remains in normal range, while the Suwannee basin runs at just 77% of normal, indicating emerging drought stress. For anglers and rafters, conditions are exceptional in Arkansas where the White River system offers three major gauges with flows between 18,200-43,800 cfs—ideal for experienced whitewater enthusiasts but requiring extreme caution.
Top river runs by streamflow
Whitewater and paddle runs sorted by current discharge. Useful as a first-look for paddlers planning a trip and an early-warning signal for downstream flood watchers.
| River run | Status | Streamflow | Class |
|---|---|---|---|
| Grand Canyon | Runnable | 9,320 cfs | III TO IV |
| Greenwood To Mammoth Bar | Runnable | 1,390 cfs | II TO II+ |
| Tunnel Run (Ralston Powerhouse To Greenwood) | Runnable | 1,390 cfs | IV- TO IV |
| Generation And Giant Gaps (Tadpole To Colfax-Iowa Hill Road) | Runnable | 1,390 cfs | IV TO IV+ |
| Yankee Jim Road To Ponderosa Way (Shirttail) | Runnable | 1,390 cfs | II TO III |
| Chili Bar | Runnable | 1,390 cfs | III TO IV |
| Coloma To Greenwood - (C To G) | Runnable | 1,390 cfs | II TO III- |
| Sunrise Avenue To Watt Avenue | Too High | 1,020 cfs | II- TO II |
| Royal Gorge (Soda Springs To Tadpole Creek) | Runnable | 817 cfs | V TO V+ |
| Christopher Creek | Too High | 443 cfs | V |
| Indian Gardens | Too Low | 30 cfs | IV- TO IV+ |
| Hell's Gate Canyon | Too Low | 14 cfs | V |
About the streamflow data
Where does this data come from?
Discharge readings come directly from the U.S. Geological Survey (USGS) streamgauge network — 10,000+ stations spread across every state. USGS publishes the data publicly; we aggregate, rank, and pair it with watershed boundaries and weather forecasts.
What is "cfs"?
Cubic feet per second — the standard unit for streamflow. One cfs is roughly 7.5 gallons per second flowing past the gauge. Small creeks run at single-digit cfs; the Mississippi runs at hundreds of thousands.
What does "percent of normal" mean?
The current flow at a gauge compared to its seasonal average for this date. 100% is right at the historical norm. 200%+ on a small-to-medium river is a strong indicator of flood conditions; below 70% indicates drought-stressed flow.
How fresh is the data?
USGS streamgauges report every 15 minutes; we re-pull every hour and re-rank. The AI briefing regenerates daily.
Can I get an alert when my home river fires?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a threshold (e.g. "alert me at 200 cfs" or "alert me on stage above 12 ft"), and you'll get a push the moment it crosses. Free with a Snoflo account.
Is this a substitute for official flood warnings?
No. Snoflo is informational. For life-safety decisions follow guidance from your local NWS forecast office and emergency management. Use Snoflo data as one input among several.
Streamflow by state
Tap any state for USGS streamgauges, surging streamflows, and the daily AI flow briefing focused on that state.