Llano River At Llano Flow Report
As of August 13, 2026, Llano River At Llano is flowing at 317 cfs with a gage height of 2.32 ft, holding steady over the past 24 hours. Source: USGS gauge #08151500, refreshed throughout the day.
Historical Data
Llano River At Llano at a glance
How Llano River At Llano is running right now, where it sits on the map, and the key gauge stats.
Llano River At Llano is flowing at 317 cfs, with the water sitting 2.32 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #08151500 in Texas. Over the past 10 days the average has been 325 cfs, peaking at 391 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Texas flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #08151500).
Estimate flows at an ungauged site
Drainage-area ratio transfer from this gauge . Most reliable for hydrologically similar sites in the same watershed with area ratios between roughly 0.5 and 1.5.
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Llano Rv At Llano is expected to recede from today's 317 cfs, toward roughly 163 cfs by 2026-08-18 (likely range 23-1171 cfs) -- about normal for the date.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Llano River At Llano
The river is primarily fed by rainfall and runoff from the surrounding hill country, making it prone to flash floods during periods of heavy rain. The river flows through several dams and reservoirs, including the Buchanan Dam and the Inks Dam, which provide important water resources for the region. Seasonally, the river experiences low flow rates during the summer months, but can rapidly rise during the fall and winter due to increased rainfall. One interesting fact about the Llano River is that it is home to a diverse array of fish species, including the Guadalupe bass, which is native only to Texas.
Nearby streamflow levels
Cross-check Llano River At Llano's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Llano River At Llano | 317 cfs |
| Sandy Creek Near Kingsland | 0 cfs |
| Beaver Creek Near Mason | 3 cfs |
| Llano River Near Mason | 320 cfs |
| San Saba River At San Saba | 60 cfs |
| Colorado River Near San Saba | 83 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Llano River At Llano. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Harper 3ene | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Llano River At Llano.
Boat launches
See all →
River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Llano River At Llano in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Llano River At Llano crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Llano River At Llano
What is the Llano River At Llano flow rate right now?
As of August 13, 2026, Llano River At Llano is flowing at 317 cfs. The live value, gage height, and 24-hour trend are shown at the top of this page.
Is the Llano River At Llano running high or low right now?
Check the percent of median figure on this page: above 100% means Llano River At Llano is running higher than normal for the date, below 100% means lower. The 24-hour trend shows whether it's rising or falling.
Where does the streamflow data for Llano River At Llano come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 08151500. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Llano River At Llano rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Create a free account, or sign in.
Get the free Llano Rv At Llano report — flow alerts, favorites, and history & forecasts, plus the free iPhone app.