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Henrys Fork at St Anthony

Highest listed crest 8.84 ftFlood stage 7.0 ft37 crests since 1970

The Henrys Fork at St Anthony crested above flood stage 14 times among the 37 crests the National Weather Service lists from 1970 to 2022. The highest, 8.84 ft on June 8, 2011, was moderate flooding, 1.84 feet above flood stage. 1 other gauge on the Henrys Fork crested above flood stage within a week of it.

The gauge

Highest listed crest
8.84 ft
June 8, 2011; 14,000 cubic feet per second
Flood stage
7.0 ft
Major flooding from 11.0 ft
Crests at major
0
14 above flood stage
Most recent flood crest
June 8, 2011
8.84 ft, moderate flooding
Location
Fremont County
Near Rexburg (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, Henrys Fork at St Anthony
Action stage6.55May 19, 2008The level at which the NWS or its partners begin to take action
Flood stage (minor)7.012Jun 8, 2010Minimal or no property damage, but possibly some public threat
Moderate flood stage8.22Jun 8, 2011Some inundation of structures and roads near the stream
Major flood stage11.00—Extensive inundation of structures and roads

Every listed crest

37 crests from 1970 to 2022. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Henrys Fork at St Anthony, 1970 to 2022 4681012ft Flood stage 7.0 ftMajor 11.0 ft May 28, 1970: 7.32 ft, minor flooding; 9,670 cubic feet per secondMay 13, 1971: 7.07 ft, minor flooding; 8,960 cubic feet per secondJun 6, 1974: 7.09 ft, minor flooding; 9,760 cubic feet per secondJun 4, 1975: 7.77 ft, minor flooding; 11,500 cubic feet per secondMay 19, 1976: 7.25 ft, minor flooding; 9,700 cubic feet per secondJun 9, 1981: 7.32 ft, minor flooding; 9,930 cubic feet per secondMay 19, 1982: 7.15 ft, minor flooding; 9,370 cubic feet per secondMay 26, 1983: 7.25 ft, minor flooding; 9,690 cubic feet per secondMay 16, 1984: 8.62 ft, moderate flooding; 13,200 cubic feet per secondMay 4, 1985: 6.67 ft, action stage; 8,350 cubic feet per secondMay 4, 1986: 6.43 ft, below flood stage; 7,730 cubic feet per secondMay 18, 1991: 6.27 ft, below flood stage; 7,630 cubic feet per secondMay 15, 1993: 6.86 ft, action stage; 9,560 cubic feet per secondMay 12, 1995: 6.90 ft, action stage; 9,700 cubic feet per secondMay 17, 1996: 7.49 ft, minor flooding; 10,400 cubic feet per secondMay 30, 1997: 7.57 ft, minor flooding; 10,600 cubic feet per secondMay 7, 1998: 6.44 ft, below flood stage; 7,630 cubic feet per secondJun 3, 1999: 7.38 ft, minor flooding; 10,100 cubic feet per secondMay 26, 2000: 5.61 ft, below flood stage; 5,570 cubic feet per secondMay 22, 2005: 5.49 ft, below flood stage; 5,270 cubic feet per secondMay 8, 2006: 6.51 ft, action stage; 7,810 cubic feet per secondApr 30, 2007: 5.11 ft, below flood stage; 4,320 cubic feet per secondMay 19, 2008: 6.69 ft, action stage; 8,270 cubic feet per secondMay 8, 2009: 5.59 ft, below flood stage; 5,520 cubic feet per secondJun 8, 2010: 7.19 ft, minor flooding; 9,565 cubic feet per secondJun 8, 2011: 8.84 ft, moderate flooding; 14,000 cubic feet per secondApr 27, 2012: 5.96 ft, below flood stage; 6,430 cubic feet per secondMay 14, 2013: 4.93 ft, below flood stage; 3,900 cubic feet per secondMay 5, 2014: 5.34 ft, below flood stage; 4,890 cubic feet per secondMay 17, 2015: 4.77 ft, below flood stage; 3,540 cubic feet per secondApr 24, 2016: 5.20 ft, below flood stage; 4,470 cubic feet per secondMay 10, 2017: 5.75 ft, below flood stage; 5,910 cubic feet per secondApr 28, 2018: 6.09 ft, below flood stage; 6,750 cubic feet per secondMay 17, 2019: 5.85 ft, below flood stage; 6,160 cubic feet per secondApr 30, 2020: 5.67 ft, below flood stage; 5,710 cubic feet per secondMay 1, 2021: 4.96 ft, below flood stage; 3,970 cubic feet per secondJun 14, 2022: 5.80 ft, below flood stage; 6,030 cubic feet per second Highest, 8.84 ft, Jun 8, 2011 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Henrys Fork at St Anthony 1970s: 5 5 1980s: 4 1990s: 3 2000s: 0 2010s: 2 2020s: 0 1970s1980s1990s2000s2010s2020s
  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, Henrys Fork at St Anthony
1Jun 8, 20118.84+1.84Moderate14,000
2May 16, 19848.62+1.62Moderate13,200
3Jun 4, 19757.77+0.77Minor11,500
4May 30, 19977.57+0.57Minor10,600
5May 17, 19967.49+0.49Minor10,400
6Jun 3, 19997.38+0.38Minor10,100
7May 28, 19707.32+0.32Minor9,670
8Jun 9, 19817.32+0.32Minor9,930
9May 19, 19767.25+0.25Minor9,700
10May 26, 19837.25+0.25Minor9,690
11Jun 8, 20107.19+0.19Minor9,565
12May 19, 19827.15+0.15Minor9,370
13Jun 6, 19747.09+0.09Minor9,760
14May 13, 19717.07+0.07Minor8,960
15May 12, 19956.90−0.10Action9,700
16May 15, 19936.86−0.14Action9,560
17May 19, 20086.69−0.31Action8,270
18May 4, 19856.67−0.33Action8,350
19May 8, 20066.51−0.49Action7,810
20May 7, 19986.44−0.56Below flood stage7,630
21May 4, 19866.43−0.57Below flood stage7,730
22May 18, 19916.27−0.73Below flood stage7,630
23Apr 28, 20186.09−0.91Below flood stage6,750
24Apr 27, 20125.96−1.04Below flood stage6,430
25May 17, 20195.85−1.15Below flood stage6,160
26Jun 14, 20225.80−1.20Below flood stage6,030
27May 10, 20175.75−1.25Below flood stage5,910
28Apr 30, 20205.67−1.33Below flood stage5,710
29May 26, 20005.61−1.39Below flood stage5,570
30May 8, 20095.59−1.41Below flood stage5,520
31May 22, 20055.49−1.51Below flood stage5,270
32May 5, 20145.34−1.66Below flood stage4,890
33Apr 24, 20165.20−1.80Below flood stage4,470
34Apr 30, 20075.11−1.89Below flood stage4,320
35May 1, 20214.96−2.04Below flood stage3,970
36May 14, 20134.93−2.07Below flood stage3,900
37May 17, 20154.77−2.23Below flood stage3,540

The worst floods along the Henrys Fork

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

June 8, 2011: 8.84 ft here, moderate flooding

  • RexburgID · Jun 9, 2011 · 11.87 ft · Moderate

May 16, 1984: 8.62 ft here, moderate flooding

  • RexburgID · May 17, 1984 · 12.05 ft · Moderate · its highest

June 4, 1975: 7.77 ft here, minor flooding

  • RexburgID · Jun 5, 1975 · 10.22 ft · Minor

Gauges on the Henrys Fork

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

Flood gauges on the Henrys Fork
St Anthony this gaugeID7.08.84 ft, Jun 8, 20110
RexburgID9.512.05 ft, May 17, 19840

Other gauges in Fremont County

Flood gauges in Fremont County
Chester6.57.83 ft, Jun 9, 19810
St. Anthony6.06.78 ft, Jun 11, 19970

Fremont County: every hazard · River floods across the country · Idaho

NOAA National Water Prediction Service, gauge ANTI1, 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.