Little Sioux River near Montgomery
Highest listed crest 1,395.88 ftFlood stage 1,391.0 ft7 crests since 2018
The Little Sioux River near Montgomery crested at major flood stage 2 times among the 7 crests the National Weather Service lists from 2018 to 2025. The highest, 1,395.88 ft on June 23, 2024, was major flooding, 4.88 feet above flood stage. 7 other gauges on the Little Sioux River crested above flood stage within a week of it, 6 at their own highest listed crest.
The gauge
- Highest listed crest
- 1,395.88 ft
- June 23, 2024
- Flood stage
- 1,391.0 ft
- Major flooding from 1,394.5 ft
- Crests at major
- 2
- 70th of 203 gauges in Iowa
- Most recent flood crest
- June 23, 2024
- 1,395.88 ft, major flooding
Flood stages
The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.
| Action stage | 1,390.0 | 1 | Apr 15, 2018 |
| Flood stage (minor) | 1,391.0 | 1 | Mar 7, 2020 |
| Moderate flood stage | 1,393.0 | 1 | Mar 16, 2019 |
| Major flood stage | 1,394.5 | 2 | Jun 23, 2024 |
Every listed crest
7 crests from 2018 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.
Crests at or above flood stage, by decade
- 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.
- 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
| 1 | Jun 23, 2024 | 1,395.88 | +4.88 | Major |
| 2 | Jun 24, 2018 | 1,394.90 | +3.90 | Major |
| 3 | Mar 16, 2019 | 1,394.32 | +3.32 | Moderate |
| 4 | Mar 7, 2020 | 1,391.43 | +0.43 | Minor |
| 5 | Apr 15, 2018 | 1,390.13 | −0.87 | Action |
| 6 | Mar 26, 2023 | 1,389.92 | −1.08 | Below flood stage |
| 7 | Aug 18, 2025 | 1,387.97 | −3.03 | Below flood stage |
The worst floods along the Little Sioux River
For this gauge's highest crests, the other gauges on the Little Sioux River that crested above flood stage within a week.
June 23, 2024: 1,395.88 ft here, major flooding
- Spencer / Highway 18IA · Jun 22, 2024 · 1,328.17 ft · Major · its highest
- CherokeeIA · Jun 24, 2024 · 32.98 ft · Major · its highest
- CorrectionvilleIA · Jun 24, 2024 · 30.92 ft · Major · its highest
- Linn GroveIA · Jun 23, 2024 · 29.98 ft · Major · its highest
- SpencerIA · Jun 22, 2024 · 22.20 ft · Major · its highest
- MilfordIA · Jun 22, 2024 · 20.40 ft · Major · its highest
- TurinIA · Jun 26, 2024 · 27.37 ft · Minor
June 24, 2018: 1,394.90 ft here, major flooding
- MilfordIA · Jun 25, 2018 · 20.10 ft · Major
- SpencerIA · Jun 26, 2018 · 17.40 ft · Major
- Spencer / Highway 18IA · Jun 25, 2018 · 1,326.60 ft · Moderate
March 16, 2019: 1,394.32 ft here, moderate flooding
- CherokeeIA · Mar 14, 2019 · 28.40 ft · Major
- CorrectionvilleIA · Mar 15, 2019 · 26.45 ft · Major
- Linn GroveIA · Mar 16, 2019 · 24.13 ft · Major
- SpencerIA · Mar 15, 2019 · 17.45 ft · Major
- Spencer / Highway 18IA · Mar 18, 2019 · 1,325.50 ft · Moderate
- TurinIA · Mar 15, 2019 · 29.57 ft · Moderate · its highest
- MilfordIA · Mar 18, 2019 · 18.02 ft · Moderate
Gauges on the Little Sioux River
Flood gauges sharing the river's name, linked within 80 miles of one another.
| Spencer | IA | 14.45 ft, Jul 15, 2011 | 0 |
| Cherokee | IA | 32.98 ft, Jun 24, 2024 | 9 |
| Correctionville | IA | 30.92 ft, Jun 24, 2024 | 12 |
| Linn Grove | IA | 29.98 ft, Jun 23, 2024 | 6 |
| Spencer | IA | 22.20 ft, Jun 22, 2024 | 12 |
| Milford | IA | 20.40 ft, Jun 22, 2024 | 2 |
| Montgomery this gauge | IA | 1,395.88 ft, Jun 23, 2024 | 2 |
| Spencer / Highway 18 | IA | 1,328.17 ft, Jun 22, 2024 | 1 |
| Turin | IA | 29.57 ft, Mar 15, 2019 | 0 |
Other gauges in Dickinson County
| East Okoboji Lake at East/West Okoboji Lake Channel | 8.50 ft, Jul 5, 2018 | 0 |
| Milford | 20.40 ft, Jun 22, 2024 | 2 |
| Spirit Lake near Orleans | 18.79 ft, Jul 18, 1993 | 0 |
| Lake Park | 1,400.01 ft, Jun 22, 2024 | 0 |
| West Okoboji Lake near Milford | 8.66 ft, Jul 17, 1993 | 0 |
Dickinson County: every hazard · River floods across the country · Iowa
NOAA National Water Prediction Service, gauge MLSI4, 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.