Major Flood
26 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
20 ft
Minor Flood
12 ft
Action Stage
12 ft
What Floods at Each Level
30 ft
Drainage from above loop 410 and Brooks City Base cuts streets and areas below Loop 410 in the San Antonio River flood plain off. Several homes have a few feet of water in them.
27 ft
Three residences below Loop 410 on the left bank flood. Roads into the area are flooded and dangerous.
26 ft
Major flooding reaches slabs of residences on the left bank below Southeast Loop 410. Roads and streets near the San Antonio River are severely flooded and very dangerous.
23 ft
Moderate lowland flooding of lowest roads and bridges in the flood plain make auto traffic very dangerous. Lowest homes below Loop 410 in the left flood plain are threatened.
20 ft
Moderate lowland flooding of roads and streets below Brooks City Base and in the flood plain near Loop 410 makes auto travel in the flood plain very dangerous.
12 ft
Minor lowland flooding extends into low areas of the flood plain with no significant impact.
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 |
|---|---|---|
| May 25, 2013 | 34.21 ft | 94,929 cfs |
| Oct 17, 1998 | 32.57 ft | 79,400 cfs |
| Jul 14, 1990 | 32.2 ft | 64,300 cfs |
About This Gauge
USGS Site
NWS LID
SNPT2
River
San Antonio River
County
Bexar, TX
Coordinates
29.3219°N, 98.4500°W
Get Flood Alerts for San Antonio River
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 San Antonio River at Loop 410?
The San Antonio River at Loop 410 gauge is maintained by USGS (site 08178565) 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 San Antonio River at Loop 410?
The NWS-defined flood stage for San Antonio River at Loop 410 is 12 feet. Action stage begins at 12 feet. Moderate flooding starts at 20 feet, and major flooding at 26 feet.
How do I get alerts when San Antonio River rises?
Download StormCast free on Google Play, go to River Gauges, and add San Antonio River at Loop 410 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 San Antonio River at Loop 410 gauge located?
The gauge is located in Bexar County, Texas at coordinates 29.3219°N, 98.4500°W. USGS site number: 08178565. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on San Antonio River
On This River
Downstream: San Antonio River at Elmendorf
More Resources
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.