Mf San Joaquin River Near Mammoth Lakes flow report
As of July 13, 2026, Mf San Joaquin River Near Mammoth Lakes is flowing at 74 cfs with a gage height of 3.49 ft, holding steady over the past 24 hours. Source: USGS gauge #11224000, refreshed throughout the day.
Historical Data
Mf San Joaquin River Near Mammoth Lakes at a glance
How Mf San Joaquin River Near Mammoth Lakes is running right now, where it sits on the map, and the key gauge stats.
Mf San Joaquin River Near Mammoth Lakes is flowing at 74 cfs, with the water sitting 3.49 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #11224000 in California. Over the past 10 days the average has been 85 cfs, peaking at 94 cfs.
Over the next 5 days, Mf San Joaquin R Nr Mammoth Lakes Ca is expected to recede from today's 74 cfs, toward roughly 57 cfs by 2026-07-17 (likely range 14-229 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.
Mf San Joaquin River Near Mammoth Lakes
The river is fed by various streams and tributaries, including the San Joaquin River headwaters and Rush Creek. There are no dams on this section of the river. The flow of the river is seasonal, with the highest flows usually occurring in late spring and early summer due to snowmelt. The hydrology of the river is unique because it flows through a volcanic landscape and has created natural hot springs along its banks. The data collected by this stream gauge is important for water resource managers, recreational enthusiasts, and scientists studying the health of the river ecosystem.
Nearby streamflow levels
Cross-check Mf San Joaquin River Near Mammoth Lakes's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Mf San Joaquin R Nr Mammoth Lakes Ca | 74 cfs |
| Deadman C A Big Springs Nr Crestview Ca | 20 cfs |
| Hot C A Flume Nr Mammoth Lakes Ca | 46 cfs |
| Merced R A Happy Isles Bridge Nr Yosemite Ca | 129 cfs |
| Nf Willow C Nr Sugar Pine Ca | 416 cfs |
| Big C Div Nr Fish Camp Ca | 0 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Mf San Joaquin River Near Mammoth Lakes. 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 |
|---|---|
| Crrel-Ucsb Energy Site | 29 in |
| Nohrsc Mammoth Pass | 0 in |
| Agnew Pass (Goes) | 5 in |
| Nohrsc Green Mtn | 11 in |
| Nohrsc Graveyard Meadow | 1 in |
| Nohrsc Tioga Pass-Dana Meadows | 31 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Mf San Joaquin River Near Mammoth Lakes.
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 Mf San Joaquin River Near Mammoth Lakes in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Mf San Joaquin River Near Mammoth Lakes crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Mf San Joaquin River Near Mammoth Lakes
Where does the streamflow data for Mf San Joaquin River Near Mammoth Lakes come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11224000. 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 Mf San Joaquin River Near Mammoth Lakes 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 Mf San Joaquin River Near Mammoth Lakes report
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