Little Miami River near South Lebanon

Highest listed crest 23.20 ftFlood stage 19.0 ft6 crests since 2021

The Little Miami River near South Lebanon crested above flood stage 5 times among the 6 crests the National Weather Service lists from 2021 to 2026. The highest, 23.20 ft on February 18, 2022, was minor flooding, 4.20 feet above flood stage. 2 other gauges on the Little Miami River crested above flood stage within a week of it.

The gauge

Highest listed crest: 23.20 ft; February 18, 2022
Flood stage: 19.0 ft; Major flooding from 32.0 ft
Crests at major: 0; 5 above flood stage
Most recent flood crest: March 5, 2026; 20.48 ft, minor flooding
Location: Warren County; Near Mason (3.8 mi), Lebanon (4.0 mi), Loveland (7.4 mi)
Identifiers: NWS SLBO1; 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, Little Miami River near South Lebanon

Action stage	15.0	1	Jul 7, 2022	The level at which the NWS or its partners begin to take action
Flood stage (minor)	19.0	5	Mar 5, 2026	Minimal or no property damage, but possibly some public threat
Moderate flood stage	25.0	0	—	Some inundation of structures and roads near the stream
Major flood stage	32.0	0	—	Extensive inundation of structures and roads

Every listed crest

6 crests from 2021 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

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

Highest listed crests, Little Miami River near South Lebanon

1	Feb 18, 2022	23.20	+4.20	Minor	—
2	Jun 19, 2021	21.51	+2.51	Minor	—
3	Mar 4, 2023	20.52	+1.52	Minor	—
4	Mar 5, 2026	20.48	+1.48	Minor	19,294
5	Mar 25, 2023	20.11	+1.11	Minor	—
6	Jul 7, 2022	18.00	−1.00	Action	—

The worst floods along the Little Miami River

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

February 18, 2022: 23.20 ft here, minor flooding

MilfordOH · Feb 18, 2022 · 19.65 ft · Minor
Spring ValleyOH · Feb 18, 2022 · 11.24 ft · Minor

June 19, 2021: 21.51 ft here, minor flooding

MilfordOH · Jun 19, 2021 · 18.27 ft · Minor
Spring ValleyOH · Jun 19, 2021 · 12.98 ft · Minor

March 4, 2023: 20.52 ft here, minor flooding

Spring ValleyOH · Mar 4, 2023 · 11.80 ft · Minor

Gauges on the Little Miami River

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

Flood gauges on the Little Miami River

Milford	OH	17.0	30.50 ft, Mar 27, 1913	2
South Lebanon this gauge	OH	19.0	23.20 ft, Feb 18, 2022	0
Spring Valley	OH	11.0	19.20 ft, Jan 21, 1959	2

Other gauges in Warren County

Flood gauges in Warren County

Franklin	14.0	17.60 ft, Jan 22, 1959	0

Warren County: every hazard · River floods across the country · Ohio

NOAA National Water Prediction Service, gauge SLBO1, 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.