Corte Madera Creek at Ross
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Upstream gauge unavailableDownstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 06/18/2025 5:30 PM PDTRecord: 22.6 ftCATEGORY STAGE 
Major Flooding 23 ft Moderate Flooding 20 ft Minor Flooding 17 ft Action 15 ft Reliability of the Forecast:
NOTE: Graphical forecasts are not available during times of high water, forecast crest information can be found in the local WFO web page.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 23 - Major Flood Stage. (Stage of 25.5 for co-located County ALERT stream gage.) Major flood inundation in town; travel along local roadways likely impossible and very dangerous. Major damage to local businesses and homes. Water is above guard rail on Lagunitas Road bridge.
- 20 - Moderate Flood Stage. (Stage of 22.5 for co-located County ALERT stream gage.) Lagunitas Road bridge is overtopped, and 1 to several feet of flood waters inundate local businesses, residences, and roadways.
- 17 - Minor Flood Stage. (Stage of 19.5 feet for co-located County ALERT stream gage.) Backwatering begins at Lagunitas Road bridge, with minor flooding near Town Hall and Fire Station. NWS will issue a Flash Flood Warning if not yet already issued.
Gauge Info
| Coordinates | 37.9630, -122.557 |
| RFC | CNRFC |
| State | CA |
| WFO | MTR |
| County | Marin |
| Data Provider(s) | |
| USGS and County of Marin | USGS--Water Resources of the United States |
| USGS | 11460000 |
Gauge Location
Recent Crests
| 1. | 22.59 ft | on 12-31-2005 |
| 2. | 17.50 ft | on 02-03-1998 |
| 3. | 17.04 ft | on 01-20-1993 |
| 4. | 18.07 ft | on 02-17-1986 |
| 5. | 16.89 ft | on 03-13-1983 |
Recent Crests
| 1. | 22.59 ft | on 12-31-2005 |
| 2. | 17.50 ft | on 02-03-1998 |
| 3. | 17.04 ft | on 01-20-1993 |
| 4. | 18.07 ft | on 02-17-1986 |
| 5. | 16.89 ft | on 03-13-1983 |
| 6. | 19.81 ft | on 01-04-1982 |
| 7. | 16.45 ft | on 01-11-1980 |
| 8. | 15.97 ft | on 03-21-1975 |
| 9. | 16.16 ft | on 01-16-1973 |
| 10. | 17.97 ft | on 12-20-1969 |
| 11. | 17.44 ft | on 01-21-1967 |
| 12. | 16.62 ft | on 01-05-1966 |
| 13. | 16.01 ft | on 02-13-1962 |
| 14. | 16.23 ft | on 04-02-1958 |
| 15. | 16.59 ft | on 12-07-1952 |
| 16. | 16.65 ft | on 12-03-1951 |
Historic Crests
| 1. | 22.59 ft | on 12-31-2005 |
| 2. | 19.81 ft | on 01-04-1982 |
| 3. | 18.07 ft | on 02-17-1986 |
| 4. | 17.97 ft | on 12-20-1969 |
| 5. | 17.50 ft | on 02-03-1998 |
Historic Crests
| 1. | 22.59 ft | on 12-31-2005 |
| 2. | 19.81 ft | on 01-04-1982 |
| 3. | 18.07 ft | on 02-17-1986 |
| 4. | 17.97 ft | on 12-20-1969 |
| 5. | 17.50 ft | on 02-03-1998 |
| 6. | 17.44 ft | on 01-21-1967 |
| 7. | 17.04 ft | on 01-20-1993 |
| 8. | 16.89 ft | on 03-13-1983 |
| 9. | 16.65 ft | on 12-03-1951 |
| 10. | 16.62 ft | on 01-05-1966 |
| 11. | 16.59 ft | on 12-07-1952 |
| 12. | 16.45 ft | on 01-11-1980 |
| 13. | 16.23 ft | on 04-02-1958 |
| 14. | 16.16 ft | on 01-16-1973 |
| 15. | 16.01 ft | on 02-13-1962 |
| 16. | 15.97 ft | on 03-21-1975 |
Gauge Photos
No Images Found
Probability Information
No Images Available
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.