Major Flood
28 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
24 ft
Minor Flood
20 ft
Action Stage
16 ft
What Floods at Each Level
28 ft
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 ft
Moderate lowland flooding floods secondary roads and bridges making them dangerous to traffic.
20 ft
Minor lowland flooding reaches the Farm to Market 1937 bridge floor.
16 ft
Overbank conditions with water extending into lowest areas of the flood plain with no significant damage.
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 |
|---|---|---|
| Jul 3, 2002 | 55.65 ft | — |
| Jun 30, 1900 | 55 ft | — |
| Oct 18, 1998 | 49.47 ft | 42,000 cfs |
About This Gauge
Get Flood Alerts for Medina 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 Medina River at San Antonio US 281S?
The Medina River at San Antonio US 281S gauge is maintained by USGS (site 08181500) 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 Medina River at San Antonio US 281S?
The NWS-defined flood stage for Medina River at San Antonio US 281S is 20 feet. Action stage begins at 16 feet. Moderate flooding starts at 24 feet, and major flooding at 28 feet.
How do I get alerts when Medina River rises?
Download StormCast free on Google Play, go to River Gauges, and add Medina River at San Antonio US 281S 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 Medina River at San Antonio US 281S gauge located?
The gauge is located in Bexar County, Texas at coordinates 29.2639°N, 98.4906°W. USGS site number: 08181500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Medina River
On This River
Upstream: Medina River near Macdona
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.