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.
**Major river systems across the United States are experiencing dramatically varied conditions, with Texas Hill Country watersheds recording some of the most extreme flows in recent memory while the Upper Midwest faces near-drought conditions.** The Nueces River system is showing flows exceeding 200,000% of normal in some tributaries, while the Ohio River at Old Shawneetown leads all gauges nationally with 259,000 cubic feet per second (cfs). From Florida's St. Johns River to Minnesota's Mississippi tributaries, streamflow patterns reveal a nation of hydrological extremes shaped by recent weather systems and reservoir operations.
The Texas Hill Country is experiencing extraordinary conditions that demand attention from water managers and recreationists alike. The Upper Nueces watershed is flowing at an astounding 727,273% of normal, with the Medina River at 148,119% of normal—transforming typically modest streams into raging torrents. San Antonio, Austin, and surrounding communities are witnessing exceptional flows on the Guadalupe (4,424% of normal), Frio (3,611% of normal), and San Antonio rivers. These conditions create dangerous swift-water situations but also spectacular opportunities for experienced whitewater enthusiasts. Meanwhile, coastal Texas watersheds including Matagorda Bay tributaries show similarly extreme percentages, indicating widespread heavy rainfall across the region. The Sabine River near the Texas-Louisiana border is moving 8,360 cfs, reflecting the widespread nature of recent precipitation events.
In stark contrast, the Upper Midwest presents concerning low-flow conditions. Minnesota's Wild Rice River registers just 23% of normal flow, while Washington State's Samish River in the Strait of Georgia watershed sits at 81% of normal—both indicating emerging drought stress. The Mississippi River system shows robust flows at major gauges (27,700 cfs at Hastings, 23,900 cfs at St. Paul), though tributary systems like the Minnesota River display more moderate conditions. Georgia's Savannah River maintains healthy flows exceeding 25,000 cfs near Port Wentworth, supporting navigation and municipal water supplies for Savannah. Arkansas's White River system shows strong releases from upstream dams, with Batesville recording 43,800 cfs—excellent news for trout anglers below Bull Shoals and Norfork tailwaters where consistent flows maintain prime fishing conditions through spring.
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.