Flow report

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.

USGS gauges
10K+
Surging streamflows
12
Watersheds tracked
Updated
Jul 19
Open the streamflow layer on the interactive map Pan, zoom, and overlay every USGS gauge nationwide.
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Today's flow briefing

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.

July
19
2026
Flow report
# Major Rivers Surge Across America: From Record Highs in Texas Hill Country to Concerning Lows in the North

A dramatic hydrological divide is reshaping America's waterways this week, with portions of Texas experiencing extraordinary flooding while northern watersheds face alarming deficits. The Ohio River at Old Shawneetown leads the nation with a massive 259,000 cubic feet per second (cfs) flow, while Texas Hill Country rivers are posting staggering percentage increases—the Frio River running at an astonishing 418,900% of normal and the Nueces River at 402,600% of normal. These extreme variations present both opportunities and hazards for water managers and outdoor enthusiasts, from white-water rafting conditions on swollen rivers to fishing challenges in drought-stressed watersheds.

The Texas Hill Country is experiencing an unprecedented hydrological event, with the Upper Frio and Upper Nueces watersheds transformed by recent rainfall. The Frio River's flow has exploded from a mere 8 cfs to over 34,000 cfs, creating conditions that likely range from dangerous to impassable for recreational users. Similarly, the San Antonio River system and Cibolo Creek (31,600% of normal) are running exceptionally high. This deluge extends beyond Texas—Arizona's Santa Cruz River near Tucson shows flows at 45,000% of normal, indicating widespread southwestern precipitation. Meanwhile, major navigation arteries like the Ohio River and Mississippi River system (including gauges at Hastings and St. Paul, Minnesota) are handling robust but manageable spring flows, supporting commercial traffic while offering excellent conditions for fishing near Jacksonville, Florida, where the St. Johns River flows at 152,000 cfs.

Conversely, troubling deficits plague portions of the upper Midwest and Pacific Northwest. The Wild Rice River in North Dakota registers at just 29% of normal flow, while Washington's Strait of Georgia watersheds (73% of normal) and Lake Washington basin (69% of normal) indicate persistent drought conditions that could impact salmon migrations and summer water supplies for Seattle. The Black Warrior River in Alabama has dropped to a concerning 37% of normal despite nearby systems running high. For anglers and rafters, the Arkansas River system through Oklahoma and Kansas offers moderate opportunities with flows between 4,000-10,700 cfs, while California's Sacramento River maintains steady releases near 16,000 cfs at Verona—ideal for steelhead fishing. Water managers should closely monitor the extreme Texas conditions for potential downstream flooding impacts along the Gulf Coast in coming weeks.
Right now

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
Flow report FAQ

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.