Tuolumne River Above Early Intake Near Mather flow report
As of July 13, 2026, Tuolumne River Above Early Intake Near Mather is flowing at 120 cfs with a gage height of 12.73 ft, holding steady over the past 24 hours. Source: USGS gauge #11276600, refreshed throughout the day.
Historical Data
Tuolumne River Above Early Intake Near Mather at a glance
How Tuolumne River Above Early Intake Near Mather is running right now, where it sits on the map, and the key gauge stats.
Tuolumne River Above Early Intake Near Mather is flowing at 120 cfs, with the water sitting 12.73 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #11276600 in California. Over the past 10 days the average has been 121 cfs, peaking at 124 cfs.
Over the next 5 days, Tuolumne R Ab Early Intake Nr Mather Ca is expected to hold near today's 120 cfs, toward roughly 112 cfs by 2026-07-18 (likely range 30-419 cfs) -- running well below the seasonal normal.
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 Above Early Intake Near Mather
The river is an important source of water for both agricultural and residential users, including the city of San Francisco. There are several dams and tributaries that affect the flow of the river, including the Hetch Hetchy Reservoir and the Cherry Creek. Seasonal trends show that the river experiences its highest flow in the spring due to snowmelt and rainfall, while its lowest flow is during the summer months. Interestingly, the Tuolumne River was the inspiration for John Muir's famous writing about the wilderness and conservation.
Nearby streamflow levels
Cross-check Tuolumne River Above Early Intake Near Mather's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Tuolumne R Ab Early Intake Nr Mather Ca | 120 cfs |
| Tuolumne R Bl Early Intake Nr Mather Ca | 139 cfs |
| Cherry C Nr Early Intake Ca | 40 cfs |
| Cherry C Bl Dion R Holm Ph | 96 cfs |
| Cherry C Bl Valley Dam Nr Hetch Hetchy Ca | 17 cfs |
| Eleanor C Nr Hetch Hetchy Ca | 21 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Tuolumne River Above Early Intake Near Mather. 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 |
|---|---|
| Nohrsc Lower Kibbie | — |
| Groveland 2 | 0 in |
| Nohrsc White Wolf Raws | 0 in |
| Nohrsc Paradise Meadow | — |
| Nohrsc Gianelli Meadow | 170 in |
| Nohrsc Horse Meadows | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Tuolumne River Above Early Intake Near Mather.
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 Above Early Intake Near Mather 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 Above Early Intake Near Mather crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Tuolumne River Above Early Intake Near Mather
Where does the streamflow data for Tuolumne River Above Early Intake Near Mather come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11276600. 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 Above Early Intake Near Mather 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 Above Early Intake Near Mather report
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