San Antonio River at SH 72 near Runge, TX
River level and flood forecast · Karnes County
Normal10.3 ftas of Mon 2:15 PM
The river is 16.7 ft below flood stage (27 ft).
Flow: 192 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 | 39 ft |
| Moderate flood stage | 31 ft |
| Flood stage | 27 ft |
| Action stage | 22 ft |
| Record crest (August 22, 2016) | 47.6 ft |
What floods at each level
From the National Weather Service, highest first.
- 39 ftWater is well into the floodplain. No impacts to roads or structures. Cattle and farm equipment should have been removed from the floodplain or face the threat of being cut off or lost.
- 31 ftFlooding spreads across the wide flood plain upstream and downstream. No structures are threatened. Livestock and farm equipment will need to removed from the floodplain.
- 27 ftMinor flooding of farmland occurs in lowest portions of the floodplain.
- 22 ftNo flooding impacts are expected, but property owners and ranchers should monitor flows for additional rises.
Highest crests on record
- 47.6 ft — August 22, 2016
- 38.69 ft — June 5, 2016
- 38.56 ft — July 9, 2021
- 36.62 ft — October 16, 2021
- 36.4 ft — June 5, 2021
Recent crests: 35.02 ft (July 19, 2026) · 27.13 ft (June 16, 2025) · 35.9 ft (April 8, 2023) · 36.62 ft (October 16, 2021) · 38.56 ft (July 9, 2021)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SRRT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.