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.
Rivers across the United States are experiencing dramatically varied conditions, with several major waterways showing extraordinary high flows while others face severe drought. The Ohio River leads the nation with a massive 259,000 cubic feet per second (cfs) flow at Old Shawneetown, while the Illinois River system is running at nearly 195% of normal levels. Meanwhile, some watersheds like Minnesota's Western Wild Rice River are experiencing critically low flows at just 34.5% of normal. This dramatic split reflects the nation's complex hydrological picture, with flooding concerns in the Midwest and Ohio Valley contrasting sharply with drought conditions in select northern regions.
The Midwest is experiencing exceptional streamflows, with multiple watersheds showing flows exceeding 1,000% of normal levels. The Middle Ohio-Laughery watershed is running at an astounding 14,656% of normal, while the Lower Wabash has reached 8,794% of typical flows. Major cities feeling the impact include Chicago, where the Des Plaines River watershed is at 1,117% of normal, and St. Paul-Minneapolis, where the Mississippi continues its powerful spring flow. The Illinois River near Chicago is carrying over 110,000 cfs—nearly double its historical average. These conditions create excellent opportunities for experienced whitewater enthusiasts on tributaries, though anglers should exercise extreme caution as high, turbid waters make fishing challenging and wading dangerous.
In contrast, the Southeast presents a mixed picture. Florida's St. Johns River at Jacksonville is flowing strongly at 152,000 cfs, while Georgia's Savannah River system maintains robust flows near Port Wentworth (25,700 cfs). However, Alabama's Tombigbee River is running at just 58% of normal, and the Lower St. Johns watershed in Florida sits at only 29.5% of typical levels. The Arkansas White River system shows impressive flows, with Batesville reporting 43,800 cfs—ideal for trout fishing below the dams once waters stabilize. Water managers across the Ohio Valley and Midwest are closely monitoring conditions as the combination of snowmelt and recent rainfall has pushed numerous watersheds well beyond flood stage, particularly in Pennsylvania's Lehigh and Tioga river basins, both running 800-2,100% above normal.
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.