Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

West Fork San Jacinto River near Conroe

Highest listed crest 126.93 ftFlood stage 115.8 ft50 crests since 1922

The West Fork San Jacinto River near Conroe crested at major flood stage 27 times among the 50 crests the National Weather Service lists from 1922 to 2024. The highest, 126.93 ft on August 29, 2017, was major flooding, 11.13 feet above flood stage. 2 other gauges on the West Fork San Jacinto River crested above flood stage within a week of it, 2 at their own highest listed crest.

The gauge

Highest listed crest
126.93 ft
August 29, 2017; 122,000 cubic feet per second
Flood stage
115.8 ft
Major flooding from 117.8 ft
Crests at major
27
5th of 370 gauges in Texas
Most recent flood crest
May 3, 2024
121.82 ft, major flooding
Location
Montgomery County
Near Conroe (6.1 mi), Tomball (14.2 mi)

Flood stages

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

Flood categories, West Fork San Jacinto River near Conroe
Action stage114.86Jan 8, 1998The level at which the NWS or its partners begin to take action
Flood stage (minor)115.88May 28, 2015Minimal or no property damage, but possibly some public threat
Moderate flood stage116.81Jun 9, 2001Some inundation of structures and roads near the stream
Major flood stage117.827May 3, 2024Extensive inundation of structures and roads

Every listed crest

50 crests from 1922 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the West Fork San Jacinto River near Conroe, 1922 to 2024 105110115120125130ft Flood stage 115.8 ftMajor 117.8 ft May 1, 1922: 123.00 ft, major floodingApr 22, 1926: 123.00 ft, major flooding; 80,000 cubic feet per secondMay 30, 1929: 120.50 ft, major floodingJun 12, 1940: 119.91 ft, major flooding; 13,100 cubic feet per secondApr 10, 1942: 120.26 ft, major flooding; 15,600 cubic feet per secondMay 31, 1943: 116.77 ft, minor flooding; 4,480 cubic feet per secondFeb 1, 1944: 119.90 ft, major flooding; 10,400 cubic feet per secondAug 30, 1945: 123.15 ft, major flooding; 41,100 cubic feet per secondMar 14, 1946: 121.47 ft, major flooding; 25,100 cubic feet per secondNov 6, 1946: 121.75 ft, major flooding; 27,500 cubic feet per secondMar 2, 1948: 115.08 ft, action stage; 3,320 cubic feet per secondFeb 28, 1949: 119.58 ft, major flooding; 11,000 cubic feet per secondJun 3, 1950: 123.22 ft, major flooding; 37,000 cubic feet per secondApr 25, 1952: 119.10 ft, major flooding; 9,150 cubic feet per secondMay 16, 1953: 119.75 ft, major flooding; 12,000 cubic feet per secondFeb 7, 1955: 119.70 ft, major flooding; 11,700 cubic feet per secondMay 1, 1957: 119.75 ft, major flooding; 14,000 cubic feet per secondNov 24, 1957: 119.30 ft, major flooding; 13,100 cubic feet per secondApr 19, 1959: 120.36 ft, major flooding; 17,200 cubic feet per secondJun 27, 1960: 121.78 ft, major flooding; 25,800 cubic feet per secondOct 30, 1960: 119.70 ft, major flooding; 13,600 cubic feet per secondDec 30, 1962: 116.66 ft, minor flooding; 7,880 cubic feet per secondJun 25, 1968: 116.70 ft, minor flooding; 24,300 cubic feet per secondJun 13, 1973: 116.41 ft, minor flooding; 19,300 cubic feet per secondJan 26, 1974: 115.21 ft, action stage; 12,600 cubic feet per secondApr 22, 1977: 115.04 ft, action stage; 11,800 cubic feet per secondApr 18, 1979: 118.51 ft, major flooding; 38,500 cubic feet per secondJun 14, 1981: 115.48 ft, action stage; 13,900 cubic feet per secondMay 22, 1983: 117.95 ft, major flooding; 32,500 cubic feet per secondOct 25, 1984: 113.22 ft, below flood stage; 7,170 cubic feet per secondNov 25, 1985: 115.16 ft, action stage; 15,800 cubic feet per secondJun 14, 1987: 111.53 ft, below flood stage; 5,290 cubic feet per secondNov 25, 1987: 109.83 ft, below flood stage; 4,120 cubic feet per secondApr 1, 1990: 112.19 ft, below flood stage; 5,880 cubic feet per secondJan 21, 1991: 114.11 ft, below flood stage; 9,200 cubic feet per secondJan 22, 1993: 114.23 ft, below flood stage; 9,520 cubic feet per secondOct 18, 1994: 126.10 ft, major flooding; 115,000 cubic feet per secondDec 19, 1994: 116.11 ft, minor flooding; 10,840 cubic feet per secondJan 27, 1995: 116.67 ft, minor flooding; 13,350 cubic feet per secondDec 21, 1995: 108.77 ft, below flood stage; 4,700 cubic feet per secondJan 8, 1998: 115.23 ft, action stage; 17,000 cubic feet per secondNov 14, 1998: 121.61 ft, major flooding; 55,200 cubic feet per secondJun 9, 2001: 117.18 ft, moderate flooding; 24,100 cubic feet per secondNov 6, 2002: 118.95 ft, major flooding; 38,600 cubic feet per secondFeb 13, 2004: 114.24 ft, below flood stage; 18,200 cubic feet per secondMay 13, 2015: 116.05 ft, minor flooding; 21,600 cubic feet per secondMay 28, 2015: 116.51 ft, minor flooding; 23,100 cubic feet per secondMay 28, 2016: 121.14 ft, major flooding; 59,000 cubic feet per secondAug 29, 2017: 126.93 ft, major flooding; 122,000 cubic feet per secondMay 3, 2024: 121.82 ft, major flooding; 78,300 cubic feet per second Highest, 126.93 ft, Aug 29, 2017 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, West Fork San Jacinto River near Conroe 1920s: 3 1930s: 0 1940s: 8 8 1950s: 7 1960s: 4 1970s: 2 1980s: 1 1990s: 4 2000s: 2 2010s: 4 2020s: 1 1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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, West Fork San Jacinto River near Conroe
1Aug 29, 2017126.93+11.13Major122,000
2Oct 18, 1994126.10+10.30Major115,000
3Jun 3, 1950123.22+7.42Major37,000
4Aug 30, 1945123.15+7.35Major41,100
5May 1, 1922123.00+7.20Major—
6Apr 22, 1926123.00+7.20Major80,000
7May 3, 2024121.82+6.02Major78,300
8Jun 27, 1960121.78+5.98Major25,800
9Nov 6, 1946121.75+5.95Major27,500
10Nov 14, 1998121.61+5.81Major55,200
11Mar 14, 1946121.47+5.67Major25,100
12May 28, 2016121.14+5.34Major59,000
13May 30, 1929120.50+4.70Major—
14Apr 19, 1959120.36+4.56Major17,200
15Apr 10, 1942120.26+4.46Major15,600
16Jun 12, 1940119.91+4.11Major13,100
17Feb 1, 1944119.90+4.10Major10,400
18May 16, 1953119.75+3.95Major12,000
19May 1, 1957119.75+3.95Major14,000
20Feb 7, 1955119.70+3.90Major11,700
21Oct 30, 1960119.70+3.90Major13,600
22Feb 28, 1949119.58+3.78Major11,000
23Nov 24, 1957119.30+3.50Major13,100
24Apr 25, 1952119.10+3.30Major9,150
25Nov 6, 2002118.95+3.15Major38,600
26Apr 18, 1979118.51+2.71Major38,500
27May 22, 1983117.95+2.15Major32,500
28Jun 9, 2001117.18+1.38Moderate24,100
29May 31, 1943116.77+0.97Minor4,480
30Jun 25, 1968116.70+0.90Minor24,300
31Jan 27, 1995116.67+0.87Minor13,350
32Dec 30, 1962116.66+0.86Minor7,880
33May 28, 2015116.51+0.71Minor23,100
34Jun 13, 1973116.41+0.61Minor19,300
35Dec 19, 1994116.11+0.31Minor10,840
36May 13, 2015116.05+0.25Minor21,600
37Jun 14, 1981115.48−0.32Action13,900
38Jan 8, 1998115.23−0.57Action17,000
39Jan 26, 1974115.21−0.59Action12,600
40Nov 25, 1985115.16−0.64Action15,800
41Mar 2, 1948115.08−0.72Action3,320
42Apr 22, 1977115.04−0.76Action11,800
43Feb 13, 2004114.24−1.56Below flood stage18,200
44Jan 22, 1993114.23−1.57Below flood stage9,520
45Jan 21, 1991114.11−1.69Below flood stage9,200
46Oct 25, 1984113.22−2.58Below flood stage7,170
47Apr 1, 1990112.19−3.61Below flood stage5,880
48Jun 14, 1987111.53−4.27Below flood stage5,290
49Nov 25, 1987109.83−5.97Below flood stage4,120
50Dec 21, 1995108.77−7.03Below flood stage4,700

The worst floods along the West Fork San Jacinto River

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

August 29, 2017: 126.93 ft here, major flooding

  • PorterTX · Aug 29, 2017 · 94.87 ft · Major · its highest
  • HumbleTX · Aug 29, 2017 · 69.18 ft · Major · its highest

October 18, 1994: 126.10 ft here, major flooding

  • HumbleTX · Oct 20, 1994 · 66.39 ft · Major

August 30, 1945: 123.15 ft here, major flooding

  • HumbleTX · Aug 31, 1945 · 53.18 ft · Major

Gauges on the West Fork San Jacinto River

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

Flood gauges on the West Fork San Jacinto River
Conroe this gaugeTX115.8126.93 ft, Aug 29, 201727
PorterTX81.094.87 ft, Aug 29, 20171
HumbleTX49.369.18 ft, Aug 29, 201724

Other gauges in Montgomery County

Flood gauges in Montgomery County
Splendora17.028.19 ft, Apr 1, 194520
New Caney58.081.15 ft, Aug 29, 20178
Lake Creek above The Woodlands138.0150.99 ft, Aug 28, 20170
Splendora14.027.73 ft, Oct 8, 194916
Tomball155.0166.38 ft, Aug 28, 20173
Porter81.094.87 ft, Aug 29, 20171

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

NOAA National Water Prediction Service, gauge CFKT2, 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.