gage height, Oct 23, 2026 at 1:15 PM CDT · 50 minutes ago
Below NWS minor flood stage
23.8 ft
NWS action stage
20.0 ft
NWS minor flood stage
27.0 ft
NWS moderate flood stage
28.0 ft
NWS major flood stage
29.0 ft
Highest since 1940 (USGS)
41.10 ft (August 31, 1981)
Usual range
2.94 to 3.26 ft
USGS marks recent readings as provisional: they can be revised after review.
No National Weather Service alert covering Lavaca County was active when this page was generated (Oct 23, 2026 at 2:05 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.
Last 7 days
Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.
How to read this gauge
Gage height is the height of the water surface above this gauge's own zero point, which sits at 186.42 ft NAVD88. It is not a water depth and not an elevation: add 186.42 ft to get the water surface elevation.
The flood stages are the National Weather Service's, on the same scale as the gage height; they are the NWS's references for this location, not estimates made here.
Daily highs and lows since September 11, 2026
Annual peaks since 1940
In 81 complete water years of comparable USGS records (since 1940), the highest peak was 41.10 ft on August 31, 1981. So far in water year 2027 (since October 1) the highest reading is 4.27 ft on October 1, 2026.
Each dot is the highest gage height of a water year (October to September), from the USGS annual peak record, with recent years USGS has not published yet taken from its 15-minute readings and this site's own; hover a dot for its date. Dashed lines are NWS flood stages.
NWS historic crests
Date
Crest
Above minor flood stage
August 31, 1981
41.10 ft
14.1 ft
June 30, 1940
40.60 ft
13.6 ft
May 13, 1982
32.16 ft
5.2 ft
October 15, 1957
30.55 ft
3.6 ft
June 13, 1973
30.52 ft
3.5 ft
September 13, 1974
30.16 ft
3.2 ft
November 24, 1940
29.36 ft
2.4 ft
November 4, 1965
28.83 ft
1.8 ft
The highest crests the National Weather Service lists for this gauge, as published. They can differ from the USGS annual peaks above: USGS records the year's highest gage height, which is not always the crest the NWS lists for the same flood.
highest since water year 2026 (17.62 ft on June 5, 2026)
Download the readings
lavaca-river-at-hallettsville.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,036 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.