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Leon Creek at I-35S near San Antonio

Highest listed crest 29.31 ftFlood stage 15.0 ft19 crests since 1985

The Leon Creek at I-35S near San Antonio crested at major flood stage 10 times among the 19 crests the National Weather Service lists from 1985 to 2026. The highest, 29.31 ft on October 18, 1998, was major flooding, 14.31 feet above flood stage.

The gauge

Highest listed crest
29.31 ft
October 18, 1998; 93,300 cubic feet per second
Flood stage
15.0 ft
Major flooding from 20.0 ft
Crests at major
10
59th of 370 gauges in Texas
Most recent flood crest
July 16, 2026
16.21 ft, moderate flooding
Location
Bexar County
Near San Antonio (9.9 mi), Leon Valley (11.6 mi)

Flood stages

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

Flood categories, Leon Creek at I-35S near San Antonio
Action stage13.03Oct 8, 1994The level at which the NWS or its partners begin to take action
Flood stage (minor)15.00—Minimal or no property damage, but possibly some public threat
Moderate flood stage16.05Jul 16, 2026Some inundation of structures and roads near the stream
Major flood stage20.010Jun 12, 2025Extensive inundation of structures and roads

Every listed crest

19 crests from 1985 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Leon Creek at I-35S near San Antonio, 1985 to 2026 51015202530ft Flood stage 15.0 ftMajor 20.0 ft Jun 4, 1985: 18.26 ft, moderate flooding; 11,900 cubic feet per secondJun 11, 1987: 22.30 ft, major flooding; 21,100 cubic feet per secondJul 16, 1990: 13.58 ft, action stage; 5,220 cubic feet per secondApr 5, 1991: 13.24 ft, action stage; 3,620 cubic feet per secondDec 21, 1991: 20.09 ft, major flooding; 15,700 cubic feet per secondMay 6, 1993: 18.60 ft, moderate flooding; 12,600 cubic feet per secondOct 8, 1994: 13.01 ft, action stage; 4,630 cubic feet per secondSep 15, 1996: 6.24 ft, below flood stage; 348 cubic feet per secondJun 22, 1997: 24.60 ft, major flooding; 27,900 cubic feet per secondOct 18, 1998: 29.31 ft, major flooding; 93,300 cubic feet per secondJul 2, 2002: 27.20 ft, major flooding; 45,200 cubic feet per secondNov 22, 2004: 22.92 ft, major flooding; 18,760 cubic feet per secondJun 29, 2007: 21.71 ft, major flooding; 15,245 cubic feet per secondJul 22, 2007: 17.10 ft, moderate floodingMay 25, 2013: 27.62 ft, major flooding; 50,257 cubic feet per secondJul 6, 2021: 25.79 ft, major flooding; 31,957 cubic feet per secondOct 14, 2021: 17.75 ft, moderate flooding; 9,458 cubic feet per secondJun 12, 2025: 22.96 ft, major flooding; 19,102 cubic feet per secondJul 16, 2026: 16.21 ft, moderate flooding Highest, 29.31 ft, Oct 18, 1998 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Leon Creek at I-35S near San Antonio 1980s: 2 1990s: 4 4 2000s: 4 2010s: 1 2020s: 4 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, Leon Creek at I-35S near San Antonio
1Oct 18, 199829.31+14.31Major93,300
2May 25, 201327.62+12.62Major50,257
3Jul 2, 200227.20+12.20Major45,200
4Jul 6, 202125.79+10.79Major31,957
5Jun 22, 199724.60+9.60Major27,900
6Jun 12, 202522.96+7.96Major19,102
7Nov 22, 200422.92+7.92Major18,760
8Jun 11, 198722.30+7.30Major21,100
9Jun 29, 200721.71+6.71Major15,245
10Dec 21, 199120.09+5.09Major15,700
11May 6, 199318.60+3.60Moderate12,600
12Jun 4, 198518.26+3.26Moderate11,900
13Oct 14, 202117.75+2.75Moderate9,458
14Jul 22, 200717.10+2.10Moderate—
15Jul 16, 202616.21+1.21Moderate—
16Jul 16, 199013.58−1.42Action5,220
17Apr 5, 199113.24−1.76Action3,620
18Oct 8, 199413.01−1.99Action4,630
19Sep 15, 19966.24−8.76Below flood stage348

Other gauges in Bexar County

Flood gauges in Bexar County
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
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 LKST2, 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.