Rio Grande De Manati At Ciales flow report
As of July 13, 2026, Rio Grande De Manati At Ciales is flowing at 52 cfs with a gage height of 2.25 ft. Source: USGS gauge #50035000, refreshed throughout the day.
Historical Data
Rio Grande De Manati At Ciales at a glance
How Rio Grande De Manati At Ciales is running right now, where it sits on the map, and the key gauge stats.
Rio Grande De Manati At Ciales is flowing at 52 cfs, with the water sitting 2.25 ft at the gage.
This is USGS gauge #50035000 in Puerto Rico. Over the past 10 days the average has been 58 cfs, peaking at 74 cfs.
Over the next 5 days, Rio Grande De Manati At Ciales is expected to hold near today's 52 cfs, toward roughly 52 cfs by 2026-07-18 (likely range 27-99 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 Puerto Rico 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.
Rio Grande De Manati At Ciales
The river is fed by multiple small tributaries and has no significant dams. Seasonal trends show that the river experiences low flow during the dry season and high flow during the rainy season. Interestingly, the river is known for its rich biodiversity and serves as a habitat for several aquatic species, including the Puerto Rican coqui frog. The river's hydrology is also impacted by the island's topography, which affects the river's flow rate and sediment transport. Overall, the Rio Grande de Manati at Ciales, PR is a unique and important hydrological feature of the region.
Nearby streamflow levels
Cross-check Rio Grande De Manati At Ciales's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Rio Grande De Manati At Ciales | 52 cfs |
| Rio Grande De Manati Nr Morovis | 116 cfs |
| Rio Bauta Nr Orocovis | 9 cfs |
| Rio Cibuco Blw Corozal | 1,710 cfs |
| Rio Grande De Manati At Hwy 2 Nr Manati | 1,290 cfs |
| Rio Cibuco At Vega Baja | 38 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 Rio Grande De Manati At Ciales in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Rio Grande De Manati At Ciales crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Rio Grande De Manati At Ciales
Where does the streamflow data for Rio Grande De Manati At Ciales come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 50035000. 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 Rio Grande De Manati At Ciales 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 Rio Grande De Manati At Ciales report
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