Guadalupe River (CA) above Almaden Expressway
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) 06/29/2025 10:45 PM PDTOfficial Forecast (FCST) 06/29/2025 7:14 AM PDTCATEGORY STAGE 
Major Flooding 15 ft Moderate Flooding 11.5 ft Minor Flooding 10.5 ft Action 9 ft Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions
NOTE: Forecasts are issued routinely year-round.
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
- 17.01 - Cont'...Possible overtopping of Guadalupe River near Capitol Expwy on the east side, flowing towards Pearl Ave. Additionally, possible overtopping near Thousand Oaks Park and upstream of Branham Lane flowing along streets flooding businesses and the Erickson Neighborhood. If flood is sustained or incresing, car dealerships along Capitol Expwy may be inundated as well. Potential flooding on Ross and Canoas Creeks due to high backwater caused by Guadalupe River.
- 17 - Washington/Guadalupe, Tamien and Alma/Almaden Neighborhoods east of CA-87 inundated from floodwaters traveling under street viaducts from the west. Widespread flooding in the eastern Willow Glen Neighborhood, as well as the Gardner and Atlanta/Bird Neighborhoods. CA87/I-280 interchange at risk from overland flow spilling onto the roadway.
- 15 - Major Flood Stage. Flooding continues to spill near Alam Avenue, flowing northward and crossing east under Willow Street and Alma Avenue viaducts, continuing to flow north. Overbanking occurs at Atlanta Avenue just upstream of CA87. The Willow Glen Neighborhood bounded by Willow Street and Minnesota Avenue see overland flooding. Overbanking occurs in various locations between Alma Avenue and Willow Glen Way. Potential flooding on Ross and Canoas Creeks due to high backwater caused by Guadalupe River.
Gauge Info
| Coordinates | 37.2808, -121.880 |
| RFC | CNRFC |
| State | CA |
| WFO | MTR |
| County | Santa Clara |
| Data Provider(s) | |
| SCVWD | SCVWD-Santa Clara Valley Water District |
Gauge Location
Recent Crests
| 1. | 6.09 ft | on 01-27-2021 |
| 2. | 4.45 ft | on 11-26-2019 |
| 3. | 9.15 ft | on 01-16-2019 |
| 4. | 4.31 ft | on 01-09-2018 |
| 5. | 6.45 ft | on 02-07-2017 |
Recent Crests
| 1. | 6.09 ft | on 01-27-2021 |
| 2. | 4.45 ft | on 11-26-2019 |
| 3. | 9.15 ft | on 01-16-2019 |
| 4. | 4.31 ft | on 01-09-2018 |
| 5. | 6.45 ft | on 02-07-2017 |
| 6. | 4.96 ft | on 03-05-2016 |
| 7. | 8.14 ft | on 10-19-2004 |
| 8. | 7.74 ft | on 01-01-2004 |
| 9. | 8.24 ft | on 12-16-2002 |
| 10. | 10.50 ft | on 02-03-1998 |
| 11. | 7.30 ft | on 01-26-1997 |
| 12. | 9.64 ft | on 03-10-1995 |
| 13. | 11.73 ft | on 01-09-1995 |
| 14. | 8.52 ft | on 02-19-1986 |
| 15. | 7.04 ft | on 03-01-1983 |
| 16. | 9.03 ft | on 01-24-1983 |
| 17. | 7.93 ft | on 03-31-1982 |
| 18. | 6.70 ft | on 01-04-1982 |
Historic Crests
| 1. | 11.73 ft | on 01-09-1995 |
| 2. | 10.50 ft | on 02-03-1998 |
| 3. | 9.64 ft | on 03-10-1995 |
| 4. | 9.15 ft | on 01-16-2019 |
| 5. | 9.03 ft | on 01-24-1983 |
Historic Crests
| 1. | 11.73 ft | on 01-09-1995 |
| 2. | 10.50 ft | on 02-03-1998 |
| 3. | 9.64 ft | on 03-10-1995 |
| 4. | 9.15 ft | on 01-16-2019 |
| 5. | 9.03 ft | on 01-24-1983 |
| 6. | 8.52 ft | on 02-19-1986 |
| 7. | 8.24 ft | on 12-16-2002 |
| 8. | 8.14 ft | on 10-19-2004 |
| 9. | 7.93 ft | on 03-31-1982 |
| 10. | 7.74 ft | on 01-01-2004 |
| 11. | 7.30 ft | on 01-26-1997 |
| 12. | 7.04 ft | on 03-01-1983 |
| 13. | 6.70 ft | on 01-04-1982 |
| 14. | 6.45 ft | on 02-07-2017 |
| 15. | 6.09 ft | on 01-27-2021 |
| 16. | 4.96 ft | on 03-05-2016 |
| 17. | 4.45 ft | on 11-26-2019 |
| 18. | 4.31 ft | on 01-09-2018 |
Gauge Photos
No Images Found
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.