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San Antonio River at Elmendorf

Highest listed crest 64.20 ftFlood stage 35.0 ft24 crests since 1913

The San Antonio River at Elmendorf crested at major flood stage 7 times among the 24 crests the National Weather Service lists from 1913 to 2025. The highest, 64.20 ft on October 18, 1998, was major flooding, 29.20 feet above flood stage. 3 other gauges on the San Antonio River crested above flood stage within a week of it.

The gauge

Highest listed crest
64.20 ft
October 18, 1998; 75,000 cubic feet per second
Flood stage
35.0 ft
Major flooding from 48.0 ft
Crests at major
7
90th of 370 gauges in Texas
Most recent flood crest
June 13, 2025
42.63 ft, moderate flooding
Location
Bexar County
Texas

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 Elmendorf
Action stage33.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)35.05Oct 15, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage39.012Jun 13, 2025Some inundation of structures and roads near the stream
Major flood stage48.07May 26, 2013Extensive inundation of structures and roads

Every listed crest

24 crests from 1913 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the San Antonio River at Elmendorf, 1913 to 2025 3040506070ft Flood stage 35.0 ftMajor 48.0 ft Jun 28, 1913: 53.00 ft, major floodingSep 27, 1946: 61.00 ft, major floodingJun 14, 1981: 44.50 ft, moderate flooding; 18,000 cubic feet per secondOct 11, 1984: 38.98 ft, minor flooding; 10,500 cubic feet per secondJun 5, 1986: 53.06 ft, major floodingJun 1, 1987: 40.13 ft, moderate flooding; 20,400 cubic feet per secondJul 16, 1990: 39.84 ft, moderate flooding; 20,700 cubic feet per secondDec 22, 1991: 39.06 ft, moderate flooding; 19,300 cubic feet per secondFeb 4, 1992: 37.02 ft, minor flooding; 16,000 cubic feet per secondMay 27, 1992: 39.82 ft, moderate flooding; 20,700 cubic feet per secondJun 29, 1995: 37.22 ft, minor flooding; 8,880 cubic feet per secondJun 24, 1997: 42.57 ft, moderate flooding; 13,800 cubic feet per secondOct 18, 1998: 64.20 ft, major flooding; 75,000 cubic feet per secondJul 6, 2002: 63.16 ft, major flooding; 66,000 cubic feet per secondNov 23, 2004: 50.76 ft, major flooding; 20,767 cubic feet per secondJun 29, 2007: 40.92 ft, moderate flooding; 10,375 cubic feet per secondJul 26, 2007: 44.55 ft, moderate floodingMay 26, 2013: 52.34 ft, major flooding; 31,972 cubic feet per secondApr 25, 2015: 38.21 ft, minor flooding; 10,900 cubic feet per secondMay 24, 2015: 44.99 ft, moderate flooding; 19,095 cubic feet per secondJun 3, 2016: 44.82 ft, moderate flooding; 18,847 cubic feet per secondJul 7, 2021: 39.91 ft, moderate flooding; 12,722 cubic feet per secondOct 15, 2021: 38.64 ft, minor flooding; 11,336 cubic feet per secondJun 13, 2025: 42.63 ft, moderate flooding; 15,989 cubic feet per second Highest, 64.20 ft, Oct 18, 1998 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, San Antonio River at Elmendorf 1910s: 1 1920s: 0 1930s: 0 1940s: 1 1950s: 0 1960s: 0 1970s: 0 1980s: 4 1990s: 7 7 2000s: 4 2010s: 4 2020s: 3 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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 Elmendorf
1Oct 18, 199864.20+29.20Major75,000
2Jul 6, 200263.16+28.16Major66,000
3Sep 27, 194661.00+26.00Major—
4Jun 5, 198653.06+18.06Major—
5Jun 28, 191353.00+18.00Major—
6May 26, 201352.34+17.34Major31,972
7Nov 23, 200450.76+15.76Major20,767
8May 24, 201544.99+9.99Moderate19,095
9Jun 3, 201644.82+9.82Moderate18,847
10Jul 26, 200744.55+9.55Moderate—
11Jun 14, 198144.50+9.50Moderate18,000
12Jun 13, 202542.63+7.63Moderate15,989
13Jun 24, 199742.57+7.57Moderate13,800
14Jun 29, 200740.92+5.92Moderate10,375
15Jun 1, 198740.13+5.13Moderate20,400
16Jul 7, 202139.91+4.91Moderate12,722
17Jul 16, 199039.84+4.84Moderate20,700
18May 27, 199239.82+4.82Moderate20,700
19Dec 22, 199139.06+4.06Moderate19,300
20Oct 11, 198438.98+3.98Minor10,500
21Oct 15, 202138.64+3.64Minor11,336
22Apr 25, 201538.21+3.21Minor10,900
23Jun 29, 199537.22+2.22Minor8,880
24Feb 4, 199237.02+2.02Minor16,000

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.

October 18, 1998: 64.20 ft here, major flooding

  • GoliadTX · Oct 22, 1998 · 52.87 ft · Major
  • Falls CityTX · Oct 20, 1998 · 33.60 ft · Major
  • Loop 410TX · Oct 17, 1998 · 32.57 ft · Major

July 6, 2002: 63.16 ft here, major flooding

  • GoliadTX · Jul 10, 2002 · 52.24 ft · Major
  • Falls CityTX · Jul 6, 2002 · 38.43 ft · Major · its highest

September 27, 1946: 61.00 ft here, major flooding

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 410TX12.034.21 ft, May 25, 20137
Elmendorf this gaugeTX35.064.20 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
Loop 41012.034.21 ft, May 25, 20137
Mitchell Street13.014.67 ft, May 25, 20130

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

NOAA National Water Prediction Service, gauge ELMT2, 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.