Guadalupe River at Gonzales
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
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Observed (OBS) 03/17/2025 4:45 PM CDTOfficial Forecast (FCST) 03/17/2025 8:11 AM CDTRecord: 50.4 ftCATEGORY STAGE 
Major Flooding 43 ft Moderate Flooding 37 ft Minor Flooding 31 ft Action 17 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
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
- 48 - Flow passes through the windows of the old power plant. Nearly all of the city park is under several feet of water. The flood plain northwest of town below the Guadalupe-San Marcos Rivers confluence is several miles wide. Lowest homes along miles of Tinsley Creek are flooded as the Guadalupe River backs into it.
- 45 - Flow reaches the floor of the old power plant and to the slab of the electric plant. Water is several feet deep in the baseball and concession buildings in the city park. Flooding is several miles wide in the flood plain just northwest of Gonzales. Flow approaches lower homes in the Tinsley Creek flood plain in Gonzales as the Guadalupe River backs up. Any flow down Tinsley Creek over the backflow can flood homes.
- 43 - Major flooding closes Highways 183, 97 and Farm to Market 108. Runoff down Tinsley Creek in Gonzales added to the Guadalupe River backwater can flood lowest homes near the creek. Secondary roads and streets near the river are flooded and dangerous to motorists.
Gauge Location
Recent Crests
| 1. | 40.93 ft | on 10-16-2021 |
| 2. | 18.71 ft | on 05-03-2020 |
| 3. | 32.25 ft | on 03-30-2018 |
| 4. | 42.50 ft | on 08-28-2017 |
| 5. | 30.58 ft | on 06-02-2016 |
Recent Crests
| 1. | 40.93 ft | on 10-16-2021 |
| 2. | 18.71 ft | on 05-03-2020 |
| 3. | 32.25 ft | on 03-30-2018 |
| 4. | 42.50 ft | on 08-28-2017 |
| 5. | 30.58 ft | on 06-02-2016 |
| 6. | 41.97 ft | on 11-01-2015 |
| 7. | 42.13 ft | on 05-25-2015 |
| 8. | 32.86 ft | on 05-19-2015 |
| 9. | 28.94 ft | on 11-01-2013 |
| 10. | 39.76 ft | on 01-26-2012 |
| 11. | 37.74 ft | on 06-11-2010 |
| 12. | 40.25 ft | on 07-22-2007 |
| 13. | 40.53 ft | on 03-13-2007 |
| 14. | 44.38 ft | on 11-23-2004 |
| 15. | 31.07 ft | on 07-19-2002 |
| 16. | 42.64 ft | on 07-07-2002 |
| 17. | 39.19 ft | on 11-17-2001 |
| 18. | 50.44 ft | on 10-19-1998 |
| 19. | 38.80 ft | on 06-24-1997 |
| 20. | 19.78 ft | on 09-20-1995 |
| 21. | 23.34 ft | on 05-16-1994 |
| 22. | 24.88 ft | on 05-07-1993 |
| 23. | 31.30 ft | on 02-05-1992 |
| 24. | 35.01 ft | on 12-22-1991 |
| 25. | 20.97 ft | on 09-10-1990 |
| 26. | 19.41 ft | on 05-11-1989 |
| 27. | 34.70 ft | on 06-05-1987 |
| 28. | 28.06 ft | on 11-26-1985 |
| 29. | 22.70 ft | on 06-08-1985 |
| 30. | 33.47 ft | on 06-15-1981 |
| 31. | 34.60 ft | on 05-08-1972 |
| 32. | 34.50 ft | on 10-30-1960 |
| 33. | 34.30 ft | on 09-12-1952 |
| 34. | 35.10 ft | on 07-07-1942 |
| 35. | 38.20 ft | on 07-01-1936 |
| 36. | 50.43 ft | on 05-29-1929 |
| 37. | 36.40 ft | on 04-22-1926 |
| 38. | 34.10 ft | on 10-18-1919 |
| 39. | 38.10 ft | on 12-04-1913 |
Historic Crests
| 1. | 50.44 ft | on 10-19-1998 |
| 2. | 50.43 ft | on 05-29-1929 |
| 3. | 44.38 ft | on 11-23-2004 |
| 4. | 42.64 ft | on 07-07-2002 |
| 5. | 42.50 ft | on 08-28-2017 |
Historic Crests
| 1. | 50.44 ft | on 10-19-1998 |
| 2. | 50.43 ft | on 05-29-1929 |
| 3. | 44.38 ft | on 11-23-2004 |
| 4. | 42.64 ft | on 07-07-2002 |
| 5. | 42.50 ft | on 08-28-2017 |
| 6. | 42.13 ft | on 05-25-2015 |
| 7. | 41.97 ft | on 11-01-2015 |
| 8. | 40.93 ft | on 10-16-2021 |
| 9. | 40.53 ft | on 03-13-2007 |
| 10. | 40.25 ft | on 07-22-2007 |
| 11. | 39.76 ft | on 01-26-2012 |
| 12. | 39.19 ft | on 11-17-2001 |
| 13. | 38.80 ft | on 06-24-1997 |
| 14. | 38.20 ft | on 07-01-1936 |
| 15. | 38.10 ft | on 12-04-1913 |
| 16. | 37.74 ft | on 06-11-2010 |
| 17. | 36.40 ft | on 04-22-1926 |
| 18. | 35.10 ft | on 07-07-1942 |
| 19. | 35.01 ft | on 12-22-1991 |
| 20. | 34.70 ft | on 06-05-1987 |
| 21. | 34.60 ft | on 05-08-1972 |
| 22. | 34.50 ft | on 10-30-1960 |
| 23. | 34.30 ft | on 09-12-1952 |
| 24. | 34.10 ft | on 10-18-1919 |
| 25. | 33.47 ft | on 06-15-1981 |
| 26. | 32.86 ft | on 05-19-2015 |
| 27. | 32.25 ft | on 03-30-2018 |
| 28. | 31.30 ft | on 02-05-1992 |
| 29. | 31.07 ft | on 07-19-2002 |
| 30. | 30.58 ft | on 06-02-2016 |
| 31. | 28.94 ft | on 11-01-2013 |
| 32. | 28.06 ft | on 11-26-1985 |
| 33. | 24.88 ft | on 05-07-1993 |
| 34. | 23.34 ft | on 05-16-1994 |
| 35. | 22.70 ft | on 06-08-1985 |
| 36. | 20.97 ft | on 09-10-1990 |
| 37. | 19.78 ft | on 09-20-1995 |
| 38. | 19.41 ft | on 05-11-1989 |
| 39. | 18.71 ft | on 05-03-2020 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 274.91 ft |
| moderate Flooding | 268.91 ft |
| minor Flooding | 262.91 ft |
| action | 248.91 ft |
| Latest Value | 243.06 ft |
| Gauge Zero | 231.91 ft |
Gauge Photos
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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.