Olmos Creek at Dresden Drive, TX
River level and flood forecast · Bexar County
Normal1.8 ftas of Mon 2:45 PM
The river is 7.2 ft below flood stage (9 ft).
Flow: 0 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 | 12 ft |
| Moderate flood stage | 10 ft |
| Flood stage | 9 ft |
| Action stage | 9 ft |
| Record crest (September 13, 1978) | 14.82 ft |
What floods at each level
From the National Weather Service, highest first.
- 14 ftThe reservoir behind Olmos dam fills up and causes long lasting travel impacts near the Quarry Market, including the closure of Highway 281. Major residential flooding occurs in the headwaters of Olmos Creek above Loop 410. Over a foot of water is in lowest businesses in the southwest quadrant of Loop 410 and West Avenue. Many streets and low water crossings will have several feet of turbulent flow over them.
- 13 ftThe reservoir behind Olmos dam fills up and causes long lasting travel impacts near the Quarry Market, including the closure of Highway 281. Several businesses in the southwest quadrant of Loop 410 and West Avenue flood up to a foot.
- 12 ftThe reservoir behind Olmos dam fills up and causes long lasting travel impacts near the Quarry Market, including the closure of Highway 281. Major flooding approaches slabs of the lowest businesses in the southwest quadrant of Loop 410 and West Avenue cutting off some areas.
- 10 ftModerate lowland flooding approaches businesses in the southwest quadrant of Loop 410 and West Avenue. Low bridges and crossings upstream near Lockhill-Selma are very dangerous to traffic.
- 9 ftMinor lowland flooding extends into low areas of the flood plain with no significant damage.
Highest crests on record
- 14.82 ft — September 13, 1978
- 14.54 ft — July 1, 2002
- 14.38 ft — April 5, 1991
- 14.01 ft — October 17, 1998
- 13.2 ft — May 7, 1972
Recent crests: 10.34 ft (June 12, 2025) · 9.28 ft (June 3, 2016) · 9.31 ft (April 25, 2015) · 12.78 ft (May 25, 2013) · 10.57 ft (November 22, 2004)
Up and down the river, and nearby
- Salado Creek at NE Loop 410, TX
- San Antonio River at Mitchell Street, TX
- Leon Creek at Loop 410 near Leon Valley, TX
- Leon Creek at I-10 and Loop 1604, TX
- Salado Creek at Wilderness Road near San Antonio, TX
- West Elm Creek at Encino Rio at San Antonio, TX
- Salado Creek at Loop 13, TX
- Helotes Creek at Helotes, TX
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SIOT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.