Sacramento River A Rio Vista flow report
As of July 15, 2026, Sacramento River A Rio Vista is flowing at 33,400 cfs with a gage height of 14.52 ft, receding 11% over the past 24 hours. Source: USGS gauge #11455420, refreshed throughout the day.
Historical Data
Sacramento River A Rio Vista at a glance
How Sacramento River A Rio Vista is running right now, where it sits on the map, and the key gauge stats.
Sacramento River A Rio Vista is flowing at 33,400 cfs, with the water sitting 14.52 ft at the gage. Flow is down 11% since yesterday as the gauge recedes.
This is USGS gauge #11455420 in California. Over the past 10 days the average has been 31,363 cfs, peaking at 44,700 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the California flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #11455420).
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Sacramento R A Rio Vista Ca is expected to recede from today's 33400 cfs, toward roughly 27441 cfs by 2026-07-19 (likely range 11852-63534 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.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
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.
Sacramento River A Rio Vista
It is operated by the United States Geological Survey (USGS) and provides data to a variety of stakeholders, including water users, state and federal agencies, and the public. There are several tributaries that feed into the Sacramento River, including the American River, Feather River, and Yuba River. The river's flow is affected by seasonal trends, with high flows in the winter and spring and low flows in the summer and fall. Interesting fact: The water level at the Rio Vista gauge can fluctuate as much as 20 feet in a single year due to the river's seasonal flow patterns.
Nearby streamflow levels
Cross-check Sacramento River A Rio Vista's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Sacramento R A Rio Vista Ca | 33,400 cfs |
| Threemile Slough Nr Rio Vista Ca | 1,860 cfs |
| Cache Slough Ab Ryer Island Ferry Nr Rio Vista Ca | 6,770 cfs |
| Cache Slough A S Liberty Island Nr Rio Vista Ca | 4,280 cfs |
| False R Nr Oakley Ca | 13,000 cfs |
| San Joaquin R A Jersey Point Ca | 845 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 Sacramento River A Rio Vista in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Sacramento River A Rio Vista crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Sacramento River A Rio Vista
Where does the streamflow data for Sacramento River A Rio Vista come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11455420. 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 Sacramento River A Rio Vista 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 Sacramento River A Rio Vista report
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