San Juan River At Four Corners flow report
As of July 14, 2026, San Juan River At Four Corners is flowing at 538 cfs with a gage height of 5.59 ft, holding steady over the past 24 hours. Source: USGS gauge #09371010, refreshed throughout the day.
Historical Data
San Juan River At Four Corners at a glance
How San Juan River At Four Corners is running right now, where it sits on the map, and the key gauge stats.
San Juan River At Four Corners is flowing at 538 cfs, with the water sitting 5.59 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #09371010 in Colorado. Over the past 10 days the average has been 568 cfs, peaking at 645 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Colorado flow report.
Streamflow Forecast
Over the next 5 days, San Juan River At Four Corners is expected to hold near today's 538 cfs, toward roughly 535 cfs by 2026-07-19 (likely range 301-953 cfs) -- running well below the seasonal normal.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
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 Juan River At Four Corners
The San Juan River is a major tributary of the Colorado River and its flow is provided by snowmelt and precipitation from the San Juan Mountains. The river is regulated by Navajo Dam, which was built in the 1960s. Seasonally, the river experiences high flows during the spring runoff and lower flows during the summer months. The hydrology of the San Juan River is influenced by local geology, including the presence of limestone formations that can influence water chemistry. Additionally, the San Juan River is famous for its recreational opportunities, including world-class fly fishing and white-water rafting.
Nearby streamflow levels
Cross-check San Juan River At Four Corners's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| San Juan River At Four Corners | 538 cfs |
| Mancos River Near Towaoc | 0 cfs |
| Mcelmo Creek Near Colorado-Utah State Line | 0 cfs |
| San Juan River At Shiprock | 550 cfs |
| Mcelmo Creek Above Trail Canyon Near Cortez | 16 cfs |
| Mud Creek At State Highway 32 | 9 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near San Juan River At Four Corners. 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 |
|---|---|
| Hovenweep National Monument | 0 in |
| Cortez Coop & Upper Colorado Site | 5 in |
| Bluff | 0 in |
| Mancos 3.8 Wnw | 0 in |
| Beaver Spring | 0 in |
| Nohrsc Beaver Spring | 0 in |
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 Juan River At Four Corners in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when San Juan River At Four Corners crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About San Juan River At Four Corners
Where does the streamflow data for San Juan River At Four Corners come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 09371010. 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 Juan River At Four Corners 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 Juan River At Four Corners report
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