Tuolumne River Below Lagrange Dam Near Lagrange flow report
As of July 13, 2026, Tuolumne River Below Lagrange Dam Near Lagrange is flowing at 157 cfs with a gage height of 4.50 ft, holding steady over the past 24 hours. Source: USGS gauge #11289650, refreshed throughout the day.
Historical Data
Tuolumne River Below Lagrange Dam Near Lagrange at a glance
How Tuolumne River Below Lagrange Dam Near Lagrange is running right now, where it sits on the map, and the key gauge stats.
Tuolumne River Below Lagrange Dam Near Lagrange is flowing at 157 cfs, with the water sitting 4.50 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #11289650 in California. Over the past 10 days the average has been 157 cfs, peaking at 159 cfs.
Over the next 5 days, Tuolumne R Bl Lagrange Dam Nr Lagrange Ca is expected to hold near today's 155 cfs, toward roughly 149 cfs by 2026-07-17 (likely range 40-560 cfs) -- drier than normal for the date.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the California flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
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.
Tuolumne River Below Lagrange Dam Near Lagrange
The river is fed by several tributaries, including the South Fork Tuolumne River and the Clavey River. The Tuolumne River watershed also contains several dams, including the Hetch Hetchy Reservoir, which supplies water to San Francisco. Seasonally, the river experiences high flows in the spring due to snowmelt and lower flows in the summer and fall. Interesting hydrological facts about the Tuolumne River include its role in the San Francisco Bay ecosystem and its designation as a Wild and Scenic River.
Nearby streamflow levels
Cross-check Tuolumne River Below Lagrange Dam Near Lagrange's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Tuolumne R Bl Lagrange Dam Nr Lagrange Ca | 157 cfs |
| Turlock Cn Nr La Grange Ca | 1,840 cfs |
| Modesto Cn Nr La Grange Ca | 936 cfs |
| Big C Ab Whites Gulch Nr Groveland Ca | 0 cfs |
| Black C Nr Copperopolis Ca | 0 cfs |
| Tuolumne R Bl Early Intake Nr Mather Ca | 139 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Tuolumne River Below Lagrange Dam Near Lagrange. 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 |
|---|---|
| Groveland 2 | 0 in |
| Knights Ferry 5.2 Wsw | 0 in |
| Nohrsc Lower Kibbie | — |
| Ahwahnee 2.5 Nnw | 0 in |
| Nohrsc White Wolf Raws | 0 in |
| Nohrsc Gianelli Meadow | 170 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Tuolumne River Below Lagrange Dam Near Lagrange.
Nearby reservoirs
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Boat launches
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River runs
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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 Tuolumne River Below Lagrange Dam Near Lagrange in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Tuolumne River Below Lagrange Dam Near Lagrange crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Tuolumne River Below Lagrange Dam Near Lagrange
Where does the streamflow data for Tuolumne River Below Lagrange Dam Near Lagrange come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11289650. 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 Tuolumne River Below Lagrange Dam Near Lagrange 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.
Access the free Tuolumne River Below Lagrange Dam Near Lagrange report
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