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Le Sueur River at St. Clair

Highest listed crest 33.30 ftFlood stage 25.5 ft4 crests since 2010

The Le Sueur River at St. Clair crested at major flood stage 2 times among the 4 crests the National Weather Service lists from 2010 to 2019. The highest, 33.30 ft on September 23, 2016, was major flooding, 7.80 feet above flood stage.

The gauge

Highest listed crest
33.30 ft
September 23, 2016
Flood stage
25.5 ft
Major flooding from 31.0 ft
Crests at major
2
51st of 120 gauges in Minnesota
Most recent flood crest
March 18, 2019
26.93 ft, minor flooding
Location
Blue Earth County
Near Mankato (8.5 mi), North Mankato (11.5 mi)
Identifiers
NWS SCRM5
No USGS station

Flood stages

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

Flood categories, Le Sueur River at St. Clair
Action stage22.50—The level at which the NWS or its partners begin to take action
Flood stage (minor)25.51Mar 18, 2019Minimal or no property damage, but possibly some public threat
Moderate flood stage28.00—Some inundation of structures and roads near the stream
Major flood stage31.02Sep 23, 2016Extensive inundation of structures and roads

Every listed crest

4 crests from 2010 to 2019. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Le Sueur River at St. Clair, 2010 to 2019 1520253035ft Flood stage 25.5 ftMajor 31.0 ft Sep 25, 2010: 32.18 ft, major flooding; 8,913 cubic feet per secondSep 23, 2016: 33.30 ft, major floodingSep 22, 2018: 19.89 ft, below flood stage; 2,635 cubic feet per secondMar 18, 2019: 26.93 ft, minor flooding; 5,849 cubic feet per second Highest, 33.30 ft, Sep 23, 2016 201020152020
  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, Le Sueur River at St. Clair
1Sep 23, 201633.30+7.80Major—
2Sep 25, 201032.18+6.68Major8,913
3Mar 18, 201926.93+1.43Minor5,849
4Sep 22, 201819.89−5.61Below flood stage2,635

Other gauges in Blue Earth County

Flood gauges in Blue Earth County
Mankato22.030.11 ft, Jun 21, 19931

Blue Earth County: every hazard · River floods across the country · Minnesota

NOAA National Water Prediction Service, gauge SCRM5, 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.