Medina River at San Antonio US 281S, TX
River level and flood forecast · Bexar County
Normal3.0 ftas of Mon 2:15 PM
The river is 17.0 ft below flood stage (20 ft).
Flow: 55 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 28 ft |
| Moderate flood stage | 24 ft |
| Flood stage | 20 ft |
| Action stage | 16 ft |
| Record crest (July 4, 2002) | 55.65 ft |
What floods at each level
From the National Weather Service, highest first.
- 28 ftMajor 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 ftModerate lowland flooding floods secondary roads and bridges making them dangerous to traffic.
- 20 ftMinor lowland flooding reaches the Farm to Market 1937 bridge floor.
- 16 ftOverbank conditions with water extending into lowest areas of the flood plain with no significant damage.
Highest crests on record
- 55.65 ft — July 4, 2002
- 55 ft — July 1, 1900
- 49.47 ft — October 18, 1998
- 43.59 ft — July 17, 1973
- 41.57 ft — August 29, 1946
Recent crests: 25.31 ft (June 12, 2025) · 22.77 ft (October 14, 2021) · 27.93 ft (July 7, 2021) · 26.62 ft (June 3, 2016) · 20.91 ft (May 24, 2015)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SAAT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.