San Joaquin River A Jersey Point flow report
As of July 13, 2026, San Joaquin River A Jersey Point is flowing at 845 cfs with a gage height of 6.30 ft, receding 97% over the past 24 hours. Source: USGS gauge #11337190, refreshed throughout the day.
Historical Data
San Joaquin River A Jersey Point at a glance
How San Joaquin River A Jersey Point is running right now, where it sits on the map, and the key gauge stats.
San Joaquin River A Jersey Point is flowing at 845 cfs, with the water sitting 6.30 ft at the gage. Flow is down 97% since yesterday as the gauge recedes.
This is USGS gauge #11337190 in California. Over the past 10 days the average has been 61,349 cfs, peaking at 95,200 cfs.
Over the next 5 days, San Joaquin R A Jersey Point Ca is expected to rise from today's 845 cfs, toward roughly 1930 cfs by 2026-07-12 (likely range 762-4886 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.
San Joaquin River A Jersey Point
The San Joaquin River is a major water source for farmers and consumers in California's Central Valley. The gauge measures flow and water level, providing data to water managers in real-time. There are several tributaries to the San Joaquin River, including the Merced and Tuolumne rivers, and several dams that regulate water flow. Seasonal trends in flow are driven by precipitation and snowmelt. Interesting facts about the hydrology of the San Joaquin River include its designation as one of the most endangered rivers in the US due to water withdrawals and habitat degradation.
Nearby streamflow levels
Cross-check San Joaquin River A Jersey Point's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| San Joaquin R A Jersey Point Ca | 845 cfs |
| False R Nr Oakley Ca | 13,000 cfs |
| Dutch Slough Bl Jersey Island Rd A Jersey Island | 384 cfs |
| Threemile Slough Nr Rio Vista Ca | 1,860 cfs |
| Marsh C A Brentwood Ca | 0 cfs |
| Sacramento R A Rio Vista Ca | 37,800 cfs |
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 San Joaquin River A Jersey Point in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when San Joaquin River A Jersey Point crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About San Joaquin River A Jersey Point
Where does the streamflow data for San Joaquin River A Jersey Point come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11337190. 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 San Joaquin River A Jersey Point 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 San Joaquin River A Jersey Point report
Create your free account to track this river — and everything else you love on the water.
- Flow alerts — get pinged the moment this river hits your range
- Save favorites — every river, lake & snowpack in one place
- Full history & forecasts — plus the free iPhone app