Ayish Bayou near San Augustine, TX
River level and flood forecast · San Augustine County
Normal2.9 ftas of Mon 3:15 PM
The river is 9.1 ft below flood stage (12 ft).
Flow: 104 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 | 17 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 12 ft |
| Action stage | 11.5 ft |
| Record crest (March 30, 2008) | 20.91 ft |
What floods at each level
From the National Weather Service, highest first.
- 17 ftSecondary roads near the bayou will flood and be barricaded. Moderate to severe lowland flooding will continue for at least a couple of days.
- 14.5 ftMinor lowland flooding of boat ramps.
- 14 ftLowland flooding will slowly decrease during the next few days.
- 12 ftLowland flooding of the heavily wooded floodplain will continue for the next several days.
Highest crests on record
- 20.91 ft — March 30, 2008
- 18.02 ft — September 14, 1978
- 17.5 ft — September 21, 1958
- 17.4 ft — August 30, 2017
- 17.02 ft — May 10, 2021
Recent crests: 17.02 ft (May 10, 2021) · 16.34 ft (April 30, 2021) · 15.78 ft (December 8, 2018) · 12.49 ft (April 7, 2018) · 14.56 ft (March 29, 2018)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (AYIT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.