Steamboat Slough Near Walnut Grove flow report
As of July 13, 2026, Steamboat Slough Near Walnut Grove is flowing at 3,680 cfs with a gage height of 6.28 ft, receding 29% over the past 24 hours. Source: USGS gauge #11447850, refreshed throughout the day.
Historical Data
Steamboat Slough Near Walnut Grove at a glance
How Steamboat Slough Near Walnut Grove is running right now, where it sits on the map, and the key gauge stats.
Steamboat Slough Near Walnut Grove is flowing at 3,680 cfs, with the water sitting 6.28 ft at the gage. Flow is down 29% since yesterday as the gauge recedes.
This is USGS gauge #11447850 in California. Over the past 10 days the average has been 4,476 cfs, peaking at 5,430 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the California flow report.
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.
Steamboat Slough Near Walnut Grove
The primary constituents of the flow are snowmelt and precipitation from the Sierra Nevada Mountains. The nearby tributaries, including the Cosumnes and Mokelumne rivers, may also affect the flow. The seasonal trends show peak flow in the spring from snowmelt and low flow in late summer and fall. The Steamboat Slough is known for its strong tidal influence, causing the water to flow in both directions depending on the tide. In addition, the Sacramento River Delta is a critical habitat for many species, including the endangered Delta smelt.
Nearby streamflow levels
Cross-check Steamboat Slough Near Walnut Grove's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Steamboat Slough Nr Walnut Grove Ca | 3,680 cfs |
| Miner Slough A Hwy 84 Bridge | 1,790 cfs |
| Sutter Slough A Courtland Ca | 3,600 cfs |
| Sacramento R Ab Delta Cross Channel Ca | 9,650 cfs |
| Sacramento R Bl Georgiana Slough Ca | 213 cfs |
| Sacramento R Deep Water Ship Channel Nr Rio Vista | 9,620 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 Steamboat Slough Near Walnut Grove in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Steamboat Slough Near Walnut Grove crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Steamboat Slough Near Walnut Grove
Where does the streamflow data for Steamboat Slough Near Walnut Grove come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11447850. 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 Steamboat Slough Near Walnut Grove 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 Steamboat Slough Near Walnut Grove report
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