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San Antonio River at Loop 410

Highest listed crest 34.21 ftFlood stage 12.0 ft19 crests since 1987

The San Antonio River at Loop 410 crested at major flood stage 7 times among the 19 crests the National Weather Service lists from 1987 to 2026. The highest, 34.21 ft on May 25, 2013, was major flooding, 22.21 feet above flood stage. 5 other gauges on the San Antonio River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
34.21 ft
May 25, 2013; 94,929 cubic feet per second
Flood stage
12.0 ft
Major flooding from 26.0 ft
Crests at major
7
90th of 370 gauges in Texas
Most recent flood crest
October 1, 2026
13.46 ft, minor flooding
Location
Bexar County
Near San Antonio (10.7 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, San Antonio River at Loop 410
Action stage12.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)12.07Oct 1, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage20.05Jun 12, 2025Some inundation of structures and roads near the stream
Major flood stage26.07Jun 2, 2016Extensive inundation of structures and roads

Every listed crest

19 crests from 1987 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the San Antonio River at Loop 410, 1987 to 2026 101520253035ft Flood stage 12.0 ftMajor 26.0 ft May 19, 1987: 26.79 ft, major flooding; 31,400 cubic feet per secondJul 21, 1988: 21.67 ft, moderate flooding; 14,900 cubic feet per secondJul 15, 1990: 32.20 ft, major flooding; 64,300 cubic feet per secondJun 23, 1991: 21.75 ft, moderate flooding; 16,200 cubic feet per secondMay 27, 1992: 29.36 ft, major flooding; 47,100 cubic feet per secondMay 5, 1993: 22.65 ft, moderate flooding; 18,800 cubic feet per secondMay 13, 1994: 19.37 ft, minor flooding; 10,400 cubic feet per secondJun 29, 1995: 22.45 ft, moderate flooding; 18,200 cubic feet per secondSep 15, 1996: 15.07 ft, minor flooding; 4,150 cubic feet per secondJun 21, 1997: 16.74 ft, minor flooding; 5,850 cubic feet per secondOct 17, 1998: 32.57 ft, major flooding; 79,400 cubic feet per secondMay 25, 2013: 34.21 ft, major flooding; 94,929 cubic feet per secondApr 25, 2015: 18.51 ft, minor flooding; 15,900 cubic feet per secondMay 24, 2015: 27.60 ft, major flooding; 42,163 cubic feet per secondJun 2, 2016: 27.43 ft, major flooding; 45,284 cubic feet per secondOct 9, 2018: 12.61 ft, minor flooding; 5,714 cubic feet per secondOct 14, 2021: 15.68 ft, minor flooding; 10,209 cubic feet per secondJun 12, 2025: 25.10 ft, moderate flooding; 35,743 cubic feet per secondOct 1, 2026: 13.46 ft, minor flooding; 6,799 cubic feet per second Highest, 34.21 ft, May 25, 2013 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, San Antonio River at Loop 410 1980s: 2 1990s: 9 9 2000s: 0 2010s: 5 2020s: 3 1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, San Antonio River at Loop 410
1May 25, 201334.21+22.21Major94,929
2Oct 17, 199832.57+20.57Major79,400
3Jul 15, 199032.20+20.20Major64,300
4May 27, 199229.36+17.36Major47,100
5May 24, 201527.60+15.60Major42,163
6Jun 2, 201627.43+15.43Major45,284
7May 19, 198726.79+14.79Major31,400
8Jun 12, 202525.10+13.10Moderate35,743
9May 5, 199322.65+10.65Moderate18,800
10Jun 29, 199522.45+10.45Moderate18,200
11Jun 23, 199121.75+9.75Moderate16,200
12Jul 21, 198821.67+9.67Moderate14,900
13May 13, 199419.37+7.37Minor10,400
14Apr 25, 201518.51+6.51Minor15,900
15Jun 21, 199716.74+4.74Minor5,850
16Oct 14, 202115.68+3.68Minor10,209
17Sep 15, 199615.07+3.07Minor4,150
18Oct 1, 202613.46+1.46Minor6,799
19Oct 9, 201812.61+0.61Minor5,714

The worst floods along the San Antonio River

For this gauge's highest crests, the other gauges on the San Antonio River that crested above flood stage within a week.

May 25, 2013: 34.21 ft here, major flooding

October 17, 1998: 32.57 ft here, major flooding

  • ElmendorfTX · Oct 18, 1998 · 64.20 ft · Major · its highest
  • GoliadTX · Oct 22, 1998 · 52.87 ft · Major
  • Falls CityTX · Oct 20, 1998 · 33.60 ft · Major

July 15, 1990: 32.20 ft here, major flooding

  • ElmendorfTX · Jul 16, 1990 · 39.84 ft · Moderate
  • GoliadTX · Jul 21, 1990 · 27.66 ft · Minor
  • Falls CityTX · Jul 18, 1990 · 15.79 ft · Minor

Gauges on the San Antonio River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the San Antonio River
Mitchell StreetTX13.014.67 ft, May 25, 20130
Loop 410 this gaugeTX12.034.21 ft, May 25, 20137
ElmendorfTX35.064.20 ft, Oct 18, 19987
FloresvilleTX27.038.11 ft, Jun 4, 20160
Falls CityTX12.038.43 ft, Jul 6, 200210
SH 72 near RungeTX27.047.60 ft, Aug 22, 20161
GoliadTX25.053.70 ft, Sep 23, 196717

Other gauges in Bexar County

Flood gauges in Bexar County
I-35S near San Antonio15.029.31 ft, Oct 18, 199810
San Antonio US 281S20.055.65 ft, Jul 4, 200211
Somerset18.042.19 ft, Jul 6, 20021
Dresden Drive9.014.82 ft, Sep 13, 19787
Loop 1318.034.07 ft, Oct 17, 199810
NE Loop 41012.024.00 ft, Oct 1, 19136
Elmendorf35.064.20 ft, Oct 18, 19987
Mitchell Street13.014.67 ft, May 25, 20130

Bexar County: every hazard · River floods across the country · Texas

NOAA National Water Prediction Service, gauge SNPT2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.