Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Floyd River at James

Highest listed crest 32.39 ftFlood stage 26.0 ft53 crests since 1972

The Floyd River at James crested above flood stage 6 times among the 53 crests the National Weather Service lists from 1972 to 2025. The highest, 32.39 ft on June 23, 2024, was moderate flooding, 6.39 feet above flood stage. 5 other gauges on the Floyd River crested above flood stage within a week of it, 4 at their own highest listed crest.

The gauge

Highest listed crest
32.39 ft
June 23, 2024; 40,800 cubic feet per second
Flood stage
26.0 ft
Major flooding from 34.0 ft
Crests at major
0
6 above flood stage
Most recent flood crest
June 23, 2024
32.39 ft, moderate flooding
Location
Plymouth County
Near Sioux City (6.9 mi), South Sioux City (9.4 mi)

Flood stages

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

Flood categories, Floyd River at James
Action stage24.01Jun 22, 1996The level at which the NWS or its partners begin to take action
Flood stage (minor)26.04Sep 22, 2018Minimal or no property damage, but possibly some public threat
Moderate flood stage30.02Jun 23, 2024Some inundation of structures and roads near the stream
Major flood stage34.00—Extensive inundation of structures and roads

Every listed crest

53 crests from 1972 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Floyd River at James, 1972 to 2025 010203040ft Flood stage 26.0 ftMajor 34.0 ft Mar 6, 1972: 18.66 ft, below flood stage; 2,940 cubic feet per secondMar 4, 1973: 20.46 ft, below flood stage; 5,660 cubic feet per secondJun 23, 1974: 16.63 ft, below flood stage; 2,180 cubic feet per secondJun 6, 1975: 16.42 ft, below flood stage; 2,180 cubic feet per secondMay 22, 1976: 14.95 ft, below flood stage; 1,610 cubic feet per secondJul 24, 1977: 15.14 ft, below flood stage; 1,720 cubic feet per secondMar 20, 1978: 21.94 ft, below flood stage; 7,630 cubic feet per secondMar 23, 1979: 28.19 ft, minor flooding; 15,500 cubic feet per secondMay 30, 1980: 17.60 ft, below flood stage; 4,000 cubic feet per secondJun 14, 1981: 16.77 ft, below flood stage; 3,400 cubic feet per secondFeb 24, 1982: 19.10 ft, below flood stage; 5,220 cubic feet per secondJun 21, 1983: 28.85 ft, minor flooding; 18,000 cubic feet per secondJun 21, 1984: 21.18 ft, below flood stage; 7,880 cubic feet per secondApr 23, 1985: 22.84 ft, below flood stage; 11,100 cubic feet per secondMar 18, 1986: 21.34 ft, below flood stage; 8,040 cubic feet per secondMar 25, 1987: 15.04 ft, below flood stage; 2,700 cubic feet per secondAug 22, 1988: 15.85 ft, below flood stage; 3,100 cubic feet per secondJul 18, 1989: 16.07 ft, below flood stage; 3,500 cubic feet per secondMay 19, 1990: 20.70 ft, below flood stage; 8,090 cubic feet per secondJun 1, 1991: 19.38 ft, below flood stage; 6,780 cubic feet per secondJul 12, 1992: 15.40 ft, below flood stage; 2,750 cubic feet per secondMar 29, 1993: 22.34 ft, below flood stage; 9,720 cubic feet per secondFeb 19, 1994: 21.00 ft, below flood stage; 5,900 cubic feet per secondMay 29, 1995: 16.06 ft, below flood stage; 3,390 cubic feet per secondJun 22, 1996: 25.35 ft, action stage; 10,000 cubic feet per secondMar 12, 1997: 20.69 ft, below flood stageMay 30, 1998: 13.91 ft, below flood stage; 2,160 cubic feet per secondJul 3, 1999: 14.41 ft, below flood stage; 2,430 cubic feet per secondMay 18, 2000: 13.28 ft, below flood stage; 1,720 cubic feet per secondMar 21, 2001: 17.64 ft, below flood stage; 4,910 cubic feet per secondJun 11, 2002: 12.79 ft, below flood stage; 1,400 cubic feet per secondJul 10, 2003: 15.14 ft, below flood stage; 2,940 cubic feet per secondMay 23, 2004: 18.37 ft, below flood stage; 5,190 cubic feet per secondJun 25, 2005: 15.16 ft, below flood stage; 2,640 cubic feet per secondMay 2, 2006: 13.58 ft, below flood stage; 1,660 cubic feet per secondMar 13, 2007: 19.44 ft, below flood stage; 6,200 cubic feet per secondJun 3, 2008: 15.43 ft, below flood stage; 2,880 cubic feet per secondFeb 11, 2009: 17.57 ft, below flood stage; 4,500 cubic feet per secondMar 16, 2010: 20.27 ft, below flood stage; 7,530 cubic feet per secondJun 27, 2011: 18.47 ft, below flood stage; 5,770 cubic feet per secondMay 29, 2012: 14.12 ft, below flood stage; 2,340 cubic feet per secondMay 28, 2013: 27.59 ft, minor flooding; 19,800 cubic feet per secondJun 17, 2014: 23.15 ft, below flood stage; 10,700 cubic feet per secondAug 17, 2015: 13.89 ft, below flood stage; 2,360 cubic feet per secondJun 18, 2016: 16.31 ft, below flood stage; 4,060 cubic feet per secondFeb 14, 2017: 14.53 ft, below flood stage; 2,780 cubic feet per secondSep 22, 2018: 27.70 ft, minor floodingMar 15, 2019: 31.48 ft, moderate flooding; 33,500 cubic feet per secondDec 30, 2019: 13.18 ft, below flood stage; 2,070 cubic feet per secondApr 10, 2021: 9.13 ft, below flood stage; 360 cubic feet per secondFeb 27, 2023: 13.73 ft, below flood stage; 2,540 cubic feet per secondJun 23, 2024: 32.39 ft, moderate flooding; 40,800 cubic feet per secondAug 1, 2025: 17.24 ft, below flood stage; 5,140 cubic feet per second Highest, 32.39 ft, Jun 23, 2024 19801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Floyd River at James 1970s: 1 1980s: 1 1990s: 0 2000s: 0 2010s: 3 3 2020s: 1 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.
  3. 37 crests measured on an earlier gauge datum are left out: 15.20 ft on Jun 28, 1935; 18.10 ft on Mar 10, 1936; 17.20 ft on May 27, 1937; 16.50 ft on Sep 15, 1938; 16.10 ft on Mar 12, 1939; 15.40 ft on Jun 5, 1940; and more.

Highest crests

The 50 highest of 53 listed crests.

Highest listed crests, Floyd River at James
1Jun 23, 202432.39+6.39Moderate40,800
2Mar 15, 201931.48+5.48Moderate33,500
3Jun 21, 198328.85+2.85Minor18,000
4Mar 23, 197928.19+2.19Minor15,500
5Sep 22, 201827.70+1.70Minor—
6May 28, 201327.59+1.59Minor19,800
7Jun 22, 199625.35−0.65Action10,000
8Jun 17, 201423.15−2.85Below flood stage10,700
9Apr 23, 198522.84−3.16Below flood stage11,100
10Mar 29, 199322.34−3.66Below flood stage9,720
11Mar 20, 197821.94−4.06Below flood stage7,630
12Mar 18, 198621.34−4.66Below flood stage8,040
13Jun 21, 198421.18−4.82Below flood stage7,880
14Feb 19, 199421.00−5.00Below flood stage5,900
15May 19, 199020.70−5.30Below flood stage8,090
16Mar 12, 199720.69−5.31Below flood stage—
17Mar 4, 197320.46−5.54Below flood stage5,660
18Mar 16, 201020.27−5.73Below flood stage7,530
19Mar 13, 200719.44−6.56Below flood stage6,200
20Jun 1, 199119.38−6.62Below flood stage6,780
21Feb 24, 198219.10−6.90Below flood stage5,220
22Mar 6, 197218.66−7.34Below flood stage2,940
23Jun 27, 201118.47−7.53Below flood stage5,770
24May 23, 200418.37−7.63Below flood stage5,190
25Mar 21, 200117.64−8.36Below flood stage4,910
26May 30, 198017.60−8.40Below flood stage4,000
27Feb 11, 200917.57−8.43Below flood stage4,500
28Aug 1, 202517.24−8.76Below flood stage5,140
29Jun 14, 198116.77−9.23Below flood stage3,400
30Jun 23, 197416.63−9.37Below flood stage2,180
31Jun 6, 197516.42−9.58Below flood stage2,180
32Jun 18, 201616.31−9.69Below flood stage4,060
33Jul 18, 198916.07−9.93Below flood stage3,500
34May 29, 199516.06−9.94Below flood stage3,390
35Aug 22, 198815.85−10.15Below flood stage3,100
36Jun 3, 200815.43−10.57Below flood stage2,880
37Jul 12, 199215.40−10.60Below flood stage2,750
38Jun 25, 200515.16−10.84Below flood stage2,640
39Jul 24, 197715.14−10.86Below flood stage1,720
40Jul 10, 200315.14−10.86Below flood stage2,940
41Mar 25, 198715.04−10.96Below flood stage2,700
42May 22, 197614.95−11.05Below flood stage1,610
43Feb 14, 201714.53−11.47Below flood stage2,780
44Jul 3, 199914.41−11.59Below flood stage2,430
45May 29, 201214.12−11.88Below flood stage2,340
46May 30, 199813.91−12.09Below flood stage2,160
47Aug 17, 201513.89−12.11Below flood stage2,360
48Feb 27, 202313.73−12.27Below flood stage2,540
49May 2, 200613.58−12.42Below flood stage1,660
50May 18, 200013.28−12.72Below flood stage1,720

The worst floods along the Floyd River

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

June 23, 2024: 32.39 ft here, moderate flooding

  • Le MarsIA · Jun 23, 2024 · 27.97 ft · Major · its highest
  • AltonIA · Jun 22, 2024 · 26.81 ft · Major · its highest
  • MerrillIA · Jun 23, 2024 · 20.19 ft · Major · its highest
  • StrubleIA · Jun 22, 2024 · 18.47 ft · Major · its highest
  • SheldonIA · Jun 22, 2024 · 17.62 ft · Moderate

March 15, 2019: 31.48 ft here, moderate flooding

  • MerrillIA · Mar 15, 2019 · 17.60 ft · Major
  • Le MarsIA · Mar 14, 2019 · 25.84 ft · Moderate
  • AltonIA · Mar 14, 2019 · 20.87 ft · Moderate
  • StrubleIA · Mar 14, 2019 · 16.41 ft · Moderate
  • SheldonIA · Mar 14, 2019 · 13.70 ft · Minor

June 21, 1983: 28.85 ft here, minor flooding

  • MerrillIA · Jun 16, 1983 · 17.00 ft · Major
  • Le MarsIA · Jun 21, 1983 · 24.00 ft · Moderate
  • AltonIA · Jun 20, 1983 · 18.54 ft · Moderate
  • StrubleIA · Jun 20, 1983 · 15.86 ft · Moderate
  • SheldonIA · Jun 20, 1983 · 12.20 ft · Minor

Gauges on the Floyd River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Floyd River
AltonIA12.026.81 ft, Jun 22, 20241
James this gaugeIA26.032.39 ft, Jun 23, 20240
Le MarsIA20.027.97 ft, Jun 23, 20243
MerrillIA12.020.19 ft, Jun 23, 202413
SheldonIA12.019.96 ft, Jun 7, 19531
StrubleIA14.018.47 ft, Jun 22, 20241

Other gauges in Plymouth County

Flood gauges in Plymouth County
Akron16.027.35 ft, Jun 22, 202424
Jefferson31.044.50 ft, Jun 24, 20242
Richland1,117.01,128.70 ft, Jun 23, 20245
Le Mars20.027.97 ft, Jun 23, 20243
Merrill12.020.19 ft, Jun 23, 202413
Hinton28.032.68 ft, Jun 17, 20141
Millnerville8.014.54 ft, Jun 17, 20143
Oyens1,266.01,266.94 ft, Jun 22, 20240

Plymouth County: every hazard · River floods across the country · Iowa

NOAA National Water Prediction Service, gauge JMEI4, 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.