Major Flood
1125 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
1122 ft
Minor Flood
1120 ft
Action Stage
1120 ft
What Floods at Each Level
1145.08 ft
(349.1 meters), Maximum water surfce - 5,656,777 acre-feet.
1140.4 ft
(347.68 meters), Top of spillway - 5,249,661 acre-feet.
1135 ft
(346.0 meters), The lake elevation is thirteen feet into the flood pool. Disastrous flooding below Lake Amistad washes lowest mobile homes downstream. Disastrous flooding in the Vega Verde subdivision reaches the roofs of lowest homes and is a life threatening event.
1125 ft
(343.0 meters), The pool elevation is eight feet above noraml elevation and releases flood the roadthrough low areas of the Vega Verde subdivision below Amistad Dam. Several lowest homes flood severely, and much of the residential area is cut off.
1123 ft
(342.4 meters), Pool elevation is six feet above normal, and releases flood the lowest sections of the road and approach homes in the Vega Verde subdivision below Amistad Dam.
1122 ft
(342.1 meters), The lake elevation is five feet above normal pool, and releases approach low sections of the road and lowest homes in the Vega Verde subdivision below Lake Amistad.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Sep 21, 1974 | 1135.66 ft | 64,400 cfs |
| Jul 5, 2010 | 1129.86 ft | — |
| Oct 4, 1991 | 1125.3 ft | 20,130 cfs |
About This Gauge
Get Flood Alerts for Rio Grande
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Rio Grande at Lake Amistad?
The Rio Grande at Lake Amistad gauge is maintained by USGS (site 08450700) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Rio Grande at Lake Amistad?
The NWS-defined flood stage for Rio Grande at Lake Amistad is 1120 feet. Action stage begins at 1120 feet. Moderate flooding starts at 1122 feet, and major flooding at 1125 feet.
How do I get alerts when Rio Grande rises?
Download StormCast free on Google Play, go to River Gauges, and add Rio Grande at Lake Amistad to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Rio Grande at Lake Amistad gauge located?
The gauge is located in Val Verde County, Texas at coordinates 29.4502°N, 101.0587°W. USGS site number: 08450700. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- 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.