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St Joe River at St Maries

Highest listed crest 42.20 ftFlood stage 32.5 ft39 crests since 1933

The St Joe River at St Maries crested at major flood stage 7 times among the 39 crests the National Weather Service lists from 1933 to 2025. The highest, 42.20 ft on December 23, 1933, was major flooding, 9.70 feet above flood stage. 1 other gauge on the St Joe River crested above flood stage within a week of it.

The gauge

Highest listed crest
42.20 ft
December 23, 1933
Flood stage
32.5 ft
Major flooding from 38.0 ft
Crests at major
7
3rd of 78 gauges in Idaho
Most recent flood crest
May 6, 2023
33.23 ft, minor flooding
Location
Benewah County
Idaho
Identifiers
NWS SJMI1
USGS 12415070; out of service

Flood stages

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

Flood categories, St Joe River at St Maries
Action stage31.01Apr 11, 2019The level at which the NWS or its partners begin to take action
Flood stage (minor)32.518May 6, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage36.08Apr 28, 2012Some inundation of structures and roads near the stream
Major flood stage38.07Mar 20, 2017Extensive inundation of structures and roads

Every listed crest

39 crests from 1933 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the St Joe River at St Maries, 1933 to 2025 2530354045ft Flood stage 32.5 ftMajor 38.0 ft Dec 23, 1933: 42.20 ft, major floodingMay 29, 1948: 39.20 ft, major floodingApr 23, 1956: 37.80 ft, moderate floodingDec 24, 1964: 39.40 ft, major floodingMay 18, 1972: 36.00 ft, moderate floodingJan 16, 1974: 41.40 ft, major floodingMay 17, 1975: 34.40 ft, minor floodingApr 11, 1976: 35.40 ft, minor floodingMay 6, 1979: 36.40 ft, moderate floodingDec 27, 1980: 34.15 ft, minor floodingFeb 22, 1982: 37.79 ft, moderate floodingApr 17, 1985: 32.90 ft, minor floodingApr 23, 1989: 33.24 ft, minor floodingJun 3, 1990: 33.03 ft, minor floodingNov 6, 1990: 34.03 ft, minor floodingFeb 20, 1995: 33.45 ft, minor floodingNov 30, 1995: 36.40 ft, moderate floodingFeb 10, 1996: 42.00 ft, major floodingApr 25, 1996: 35.47 ft, minor floodingMay 17, 1997: 39.00 ft, major floodingApr 23, 2000: 33.54 ft, minor floodingApr 15, 2002: 36.19 ft, moderate floodingMay 21, 2008: 36.94 ft, moderate floodingJan 18, 2011: 35.97 ft, minor floodingApr 3, 2011: 33.36 ft, minor floodingMay 17, 2011: 35.76 ft, minor floodingApr 1, 2012: 33.90 ft, minor floodingApr 28, 2012: 36.28 ft, moderate floodingMar 11, 2014: 34.39 ft, minor floodingMar 15, 2016: 29.80 ft, below flood stageMar 20, 2017: 38.42 ft, major floodingMay 11, 2018: 33.18 ft, minor floodingApr 11, 2019: 31.66 ft, action stageMay 22, 2020: 30.56 ft, below flood stageJun 3, 2021: 29.36 ft, below flood stageJun 15, 2022: 33.61 ft, minor floodingMay 6, 2023: 33.23 ft, minor floodingJun 4, 2024: 29.22 ft, below flood stageMar 29, 2025: 30.55 ft, below flood stage Highest, 42.20 ft, Dec 23, 1933 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, St Joe River at St Maries 1930s: 1 1940s: 1 1950s: 1 1960s: 1 1970s: 5 1980s: 4 1990s: 7 2000s: 3 2010s: 8 8 2020s: 2 1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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, St Joe River at St Maries
1Dec 23, 193342.20+9.70Major—
2Feb 10, 199642.00+9.50Major—
3Jan 16, 197441.40+8.90Major—
4Dec 24, 196439.40+6.90Major—
5May 29, 194839.20+6.70Major—
6May 17, 199739.00+6.50Major—
7Mar 20, 201738.42+5.92Major—
8Apr 23, 195637.80+5.30Moderate—
9Feb 22, 198237.79+5.29Moderate—
10May 21, 200836.94+4.44Moderate—
11May 6, 197936.40+3.90Moderate—
12Nov 30, 199536.40+3.90Moderate—
13Apr 28, 201236.28+3.78Moderate—
14Apr 15, 200236.19+3.69Moderate—
15May 18, 197236.00+3.50Moderate—
16Jan 18, 201135.97+3.47Minor—
17May 17, 201135.76+3.26Minor—
18Apr 25, 199635.47+2.97Minor—
19Apr 11, 197635.40+2.90Minor—
20May 17, 197534.40+1.90Minor—
21Mar 11, 201434.39+1.89Minor—
22Dec 27, 198034.15+1.65Minor—
23Nov 6, 199034.03+1.53Minor—
24Apr 1, 201233.90+1.40Minor—
25Jun 15, 202233.61+1.11Minor—
26Apr 23, 200033.54+1.04Minor—
27Feb 20, 199533.45+0.95Minor—
28Apr 3, 201133.36+0.86Minor—
29Apr 23, 198933.24+0.74Minor—
30May 6, 202333.23+0.73Minor—
31May 11, 201833.18+0.68Minor—
32Jun 3, 199033.03+0.53Minor—
33Apr 17, 198532.90+0.40Minor—
34Apr 11, 201931.66−0.84Action—
35May 22, 202030.56−1.94Below flood stage—
36Mar 29, 202530.55−1.95Below flood stage—
37Mar 15, 201629.80−2.70Below flood stage—
38Jun 3, 202129.36−3.14Below flood stage—
39Jun 4, 202429.22−3.28Below flood stage—

The worst floods along the St Joe River

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

December 23, 1933: 42.20 ft here, major flooding

  • CalderID · Dec 23, 1933 · 17.50 ft · Major

February 10, 1996: 42.00 ft here, major flooding

  • CalderID · Feb 9, 1996 · 15.22 ft · Moderate

January 16, 1974: 41.40 ft here, major flooding

  • CalderID · Jan 16, 1974 · 15.87 ft · Moderate

Gauges on the St Joe River

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

Flood gauges on the St Joe River
CalderID13.018.20 ft, Apr 18, 19384
St Maries this gaugeID32.542.20 ft, Dec 23, 19337

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

NOAA National Water Prediction Service, gauge SJMI1, 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.