Arroyo Trabuco A San Juan Capistrano flow report
As of July 13, 2026, Arroyo Trabuco A San Juan Capistrano is flowing at 2 cfs with a gage height of 10.76 ft. Source: USGS gauge #11047300, refreshed throughout the day.
Historical Data
Arroyo Trabuco A San Juan Capistrano at a glance
How Arroyo Trabuco A San Juan Capistrano is running right now, where it sits on the map, and the key gauge stats.
Arroyo Trabuco A San Juan Capistrano is flowing at 2 cfs, with the water sitting 10.76 ft at the gage.
This is USGS gauge #11047300 in California. Over the past 10 days the average has been 2 cfs, peaking at 3 cfs.
Over the next 5 days, Arroyo Trabuco A San Juan Capistrano Ca is expected to recede from today's 2 cfs, toward roughly 1 cfs by 2026-07-17 (likely range 0-4 cfs) -- about 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.
Arroyo Trabuco A San Juan Capistrano
The creek is a tributary of the San Juan Creek and has two small dams along its length. The flow of the creek is highly variable and is influenced by seasonal trends, with the highest flows occurring during the rainy season from November to April. Interesting fact: The creek was named after the Spanish word "trabuco," meaning blunderbuss, due to the sound the creek makes when it is flowing rapidly. The Arroyo Trabuco streamgauge is an important tool for monitoring the hydrology of the area and providing data for water management decisions.
Nearby streamflow levels
Cross-check Arroyo Trabuco A San Juan Capistrano's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Arroyo Trabuco A San Juan Capistrano Ca | 2 cfs |
| Cristianitos C Ab San Mateo C Nr San Clemente Ca | 0 cfs |
| San Onofre C A San Onofre Ca | 0 cfs |
| San Mateo C Nr San Clemente Ca | 166 cfs |
| Agua Chinon Wash Nr Irvine Ca | 0 cfs |
| Sand Cyn C A Irvine Ca | 0 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Arroyo Trabuco A San Juan Capistrano. 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 |
|---|---|
| Escondido 0.5 Sse | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Arroyo Trabuco A San Juan Capistrano.
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 Arroyo Trabuco A San Juan Capistrano in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Arroyo Trabuco A San Juan Capistrano crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Arroyo Trabuco A San Juan Capistrano
Where does the streamflow data for Arroyo Trabuco A San Juan Capistrano come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11047300. 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 Arroyo Trabuco A San Juan Capistrano 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 Arroyo Trabuco A San Juan Capistrano report
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