Colgan Creek Near Sebastopol flow report
As of July 13, 2026, Colgan Creek Near Sebastopol is flowing at 0 cfs with a gage height of 67.87 ft. Source: USGS gauge #11465700, refreshed throughout the day.
Historical Data
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.
Colgan Creek Near Sebastopol
The Laguna de Santa Rosa watershed is home to a variety of constituents, including endangered species such as the California freshwater shrimp. The stream is also impacted by a number of tributaries, including Atascadero Creek and Matanzas Creek, and is regulated by the Marmorstein Dam. Seasonal trends in the Laguna de Santa Rosa watershed are characterized by high flows in the winter and low flows in the summer. Interestingly, the stream gauge is located in an area with historical importance to the Pomo and Coast Miwok Native American tribes.
Nearby streamflow levels
Cross-check Colgan Creek Near Sebastopol's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Colgan C Nr Sebastopol Ca | 0 cfs |
| Laguna De Santa Rosa A Stony Pt Rd Nr Cotati Ca | 1 cfs |
| Colgan C Nr Santa Rosa Ca | 1 cfs |
| Copeland C A Rohnert Park Ca | 2 cfs |
| Laguna De Santa Rosa C Nr Sebastopol Ca | 1 cfs |
| Santa Rosa C A Santa Rosa Ca | 19 cfs |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Colgan Creek Near Sebastopol.
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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 Colgan Creek Near Sebastopol in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Colgan Creek Near Sebastopol crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Colgan Creek Near Sebastopol
Where does the streamflow data for Colgan Creek Near Sebastopol come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11465700. 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 Colgan Creek Near Sebastopol 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 Colgan Creek Near Sebastopol report
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