Medina River at San Antonio US 281S
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
- Downstream 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) 06/30/2025 8:15 AM CDTRecord: 55.6 ftCATEGORY STAGE 
Major Flooding 28 ft Moderate Flooding 24 ft Minor Flooding 20 ft Action 16 ft Reliability of the Forecast:
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
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
- 28 - Major flooding puts the Farm to Market 1937 bridge floor under eight feet of water. Flow approaches homes downstream near Losoya. Livestock are cut off and potentiallly drowned in the flood plain.
- 24 - Moderate lowland flooding floods secondary roads and bridges making them dangerous to traffic.
- 20 - Minor lowland flooding reaches the Farm to Market 1937 bridge floor.
Gauge Info
| Coordinates | 29.2639, -98.4906 |
| RFC | WGRFC |
| State | TX |
| WFO | EWX |
| County | Bexar |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 08181500 |
Gauge Location
Recent Crests
| 1. | 25.31 ft | on 06-12-2025 |
| 2. | 22.77 ft | on 10-14-2021 |
| 3. | 27.93 ft | on 07-07-2021 |
| 4. | 26.62 ft | on 06-03-2016 |
| 5. | 20.91 ft | on 05-24-2015 |
Recent Crests
| 1. | 25.31 ft | on 06-12-2025 |
| 2. | 22.77 ft | on 10-14-2021 |
| 3. | 27.93 ft | on 07-07-2021 |
| 4. | 26.62 ft | on 06-03-2016 |
| 5. | 20.91 ft | on 05-24-2015 |
| 6. | 32.37 ft | on 05-26-2013 |
| 7. | 24.96 ft | on 06-29-2007 |
| 8. | 26.28 ft | on 11-17-2004 |
| 9. | 55.65 ft | on 07-04-2002 |
| 10. | 49.47 ft | on 10-18-1998 |
| 11. | 28.14 ft | on 06-23-1997 |
| 12. | 23.79 ft | on 05-06-1993 |
| 13. | 30.16 ft | on 12-22-1992 |
| 14. | 37.37 ft | on 06-05-1987 |
| 15. | 29.04 ft | on 06-14-1981 |
| 16. | 43.59 ft | on 07-17-1973 |
| 17. | 41.57 ft | on 08-29-1946 |
| 18. | 32.20 ft | on 07-01-1936 |
| 19. | 55.00 ft | on 07-01-1900 |
Historic Crests
| 1. | 55.65 ft | on 07-04-2002 |
| 2. | 55.00 ft | on 07-01-1900 |
| 3. | 49.47 ft | on 10-18-1998 |
| 4. | 43.59 ft | on 07-17-1973 |
| 5. | 41.57 ft | on 08-29-1946 |
Historic Crests
| 1. | 55.65 ft | on 07-04-2002 |
| 2. | 55.00 ft | on 07-01-1900 |
| 3. | 49.47 ft | on 10-18-1998 |
| 4. | 43.59 ft | on 07-17-1973 |
| 5. | 41.57 ft | on 08-29-1946 |
| 6. | 37.37 ft | on 06-05-1987 |
| 7. | 32.37 ft | on 05-26-2013 |
| 8. | 32.20 ft | on 07-01-1936 |
| 9. | 30.16 ft | on 12-22-1992 |
| 10. | 29.04 ft | on 06-14-1981 |
| 11. | 28.14 ft | on 06-23-1997 |
| 12. | 27.93 ft | on 07-07-2021 |
| 13. | 26.62 ft | on 06-03-2016 |
| 14. | 26.28 ft | on 11-17-2004 |
| 15. | 25.31 ft | on 06-12-2025 |
| 16. | 24.96 ft | on 06-29-2007 |
| 17. | 23.79 ft | on 05-06-1993 |
| 18. | 22.77 ft | on 10-14-2021 |
| 19. | 20.91 ft | on 05-24-2015 |
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.