Frio River near Derby
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
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Observed (OBS) 06/23/2025 6:30 AM CDTRecord: 29.4 ftCATEGORY STAGE 
Major Flooding 17 ft Moderate Flooding 7 ft Minor Flooding 6 ft Action 6 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
- 17 - Major flooding reaches lowest homes and businesses downstream in Tilden. Hundreds of livestock are trapped and potentially drowned in low areas of the flood plain near Derby to Choke Canyon Reservoir. Major flooding of crop and pasture land near the river inundates oil well pump jacks and irrigation pumps.
- 14 - Significant crop and pastureland flooding below Uvalde to Choke Canyon Reservoir floods oil well pump jacks, irrigation pumps and any equipment in the flood plain. Numerous secondary roads and low bridges are flooded. Livestock are cut off and potentially drowned in low areas of the flood plain.
- 10 - Lowland flooding below Concan to Choke Canyon Reservoir floods oil well pump jacks, irrigation pumps and any equipment in the lower flood plain near and above Derby.
Gauge Info
| Coordinates | 28.7364, -99.1444 |
| RFC | WGRFC |
| State | TX |
| WFO | EWX |
| County | Frio |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 08205500 |
Gauge Location
Recent Crests
| 1. | 9.40 ft | on 10-18-2018 | |
| 2. | 9.09 ft | on 10-12-2018 | |
| 3. | 9.02 ft | on 09-24-2018 | |
| 4. | 9.95 ft | on 09-18-2018 | (P) |
| 5. | 8.81 ft | on 09-11-2018 | (P) |
Recent Crests
| 1. | 9.40 ft | on 10-18-2018 | |
| 2. | 9.09 ft | on 10-12-2018 | |
| 3. | 9.02 ft | on 09-24-2018 | |
| 4. | 9.95 ft | on 09-18-2018 | (P) |
| 5. | 8.81 ft | on 09-11-2018 | (P) |
| 6. | 13.66 ft | on 05-26-2015 | |
| 7. | 22.02 ft | on 07-21-2007 | |
| 8. | 19.87 ft | on 07-07-2002 | |
| 9. | 21.77 ft | on 06-24-1997 | |
| 10. | 9.79 ft | on 03-06-1992 | |
| 11. | 11.65 ft | on 12-23-1991 | |
| 12. | 11.03 ft | on 07-18-1990 | |
| 13. | 17.29 ft | on 05-31-1987 | |
| 14. | 11.17 ft | on 06-18-1981 | |
| 15. | 9.97 ft | on 04-25-1981 | |
| 16. | 23.70 ft | on 06-02-1935 | |
| 17. | 29.45 ft | on 07-04-1932 |
Historic Crests
| 1. | 29.45 ft | on 07-04-1932 |
| 2. | 23.70 ft | on 06-02-1935 |
| 3. | 22.02 ft | on 07-21-2007 |
| 4. | 21.77 ft | on 06-24-1997 |
| 5. | 19.87 ft | on 07-07-2002 |
Historic Crests
| 1. | 29.45 ft | on 07-04-1932 | |
| 2. | 23.70 ft | on 06-02-1935 | |
| 3. | 22.02 ft | on 07-21-2007 | |
| 4. | 21.77 ft | on 06-24-1997 | |
| 5. | 19.87 ft | on 07-07-2002 | |
| 6. | 17.29 ft | on 05-31-1987 | |
| 7. | 13.66 ft | on 05-26-2015 | |
| 8. | 11.65 ft | on 12-23-1991 | |
| 9. | 11.17 ft | on 06-18-1981 | |
| 10. | 11.03 ft | on 07-18-1990 | |
| 11. | 9.97 ft | on 04-25-1981 | |
| 12. | 9.95 ft | on 09-18-2018 | (P) |
| 13. | 9.79 ft | on 03-06-1992 | |
| 14. | 9.40 ft | on 10-18-2018 | |
| 15. | 9.09 ft | on 10-12-2018 | |
| 16. | 9.02 ft | on 09-24-2018 | |
| 17. | 8.81 ft | on 09-11-2018 | (P) |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 466.05 ft |
| moderate Flooding | 456.05 ft |
| minor Flooding | 455.05 ft |
| action | 455.05 ft |
| Latest Value | 449.39 ft |
| Gauge Zero | 449.05 ft |
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.