Matanzas Creek A Santa Rosa flow report
As of July 15, 2026, Matanzas Creek A Santa Rosa is flowing at 3 cfs with a gage height of 155.46 ft, holding steady over the past 24 hours. Source: USGS gauge #11466170, refreshed throughout the day.
Historical Data
Matanzas Creek A Santa Rosa at a glance
How Matanzas Creek A Santa Rosa is running right now, where it sits on the map, and the key gauge stats.
Matanzas Creek A Santa Rosa is flowing at 3 cfs, with the water sitting 155.46 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #11466170 in California. Over the past 10 days the average has been 11 cfs, peaking at 36 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 #11466170).
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.
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.
Matanzas Creek A Santa Rosa
The creek is fed by several tributaries and has a dam that regulates its flow. Seasonal trends show that the flow is highest during the winter months and lowest during the summer, reflecting the region's Mediterranean climate. Interestingly, the creek is known for its high concentration of iron, which gives it a reddish-brown color. This unique feature has inspired local poets and artists, making this waterway a source of inspiration as well as a vital resource.
Nearby streamflow levels
Cross-check Matanzas Creek A Santa Rosa's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Matanzas C A Santa Rosa Ca | 3 cfs |
| Santa Rosa C A Santa Rosa Ca | 19 cfs |
| Colgan C Nr Santa Rosa Ca | 1 cfs |
| Colgan C Nr Sebastopol Ca | 0 cfs |
| Santa Rosa C A Willowside Rd Nr Santa Rosa Ca | 2 cfs |
| Laguna De Santa Rosa A Stony Pt Rd Nr Cotati Ca | 1 cfs |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Matanzas Creek A Santa Rosa.
Nearby reservoirs
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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 Matanzas Creek A Santa Rosa in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Matanzas Creek A Santa Rosa crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Matanzas Creek A Santa Rosa
Where does the streamflow data for Matanzas Creek A Santa Rosa come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11466170. 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 Matanzas Creek A Santa Rosa 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 Matanzas Creek A Santa Rosa report
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