River Conditions
Illustrated map of Grand Lake St Marys

River stage

South Lebanon, Little Miami River

River level
5.49 ft
Status
Below flood stage
Action stage
15.00 ft
Flood stage
19.00 ft
Record crest
23.20 ft

Last reported 2026-10-13 | NWS SLBO1

Record crest
23.20 ft
Flood stage
19.00 ft
Moderate flood
25.00 ft
Major flood
32.00 ft
Crest date
2022-02-18

In brief

The Little Miami River at South Lebanon, OH read 5.49 ft on Oct 13, 2026, 9.51 ft below action stage.

Source: National Weather Service gauge SLBO1

Stage threshold profile

Action stage 15.00 ftMinor flooding 19.00 ftModerate flooding 25.00 ftMajor flooding 32.00 ft CURRENT 5.49 ft

Highest crests on record

RankCrestDate
1 23.20 ft 2022-02-18
2 21.51 ft 2021-06-19
3 20.52 ft 2023-03-04
4 20.48 ft 2026-03-05
5 20.35 ft 2026-03-04
6 20.11 ft 2023-03-25
7 18.00 ft 2022-07-07

Flood crests recorded at this gauge by the National Weather Service.

What happens at each level

  1. 18.00 ft

    Flooding of lowland areas occurs from South Lebanon to Foster. Water approaches portions of Mason-Morrow-Millgrove Road, as well as Stubbs Mills Road near the river.

  2. 19.00 ft

    Flooding of lowland areas occurs from South Lebanon to Foster. Portions of Mason-Morrow-Millgrove Road are flooded, as well as Stubbs Mills Road near the river. Front Street in Morrow floods.

  3. 20.00 ft

    Flood waters approach low-lying roads in Foster and South Lebanon, in addition to flooding along Front Street in Morrow, Stubbs Mills Road and stretches of Mason Morrow Millgrove Road.

  4. 21.00 ft

    Flooding can be expected near Turtle Creek in South Lebanon. Roads affected by the flooding include Broadway, McKinley and Pike Streets, with expanded flooding along Mason-Morrow-Millgrove Road and in areas of Morrow.

  5. 23.00 ft

    Low-lying roads are affected in South Lebanon including South Main and McKinley Streets and King Avenue. Some homes near the river incur basement flooding in South Lebanon. Lowland flooding can be expected along the Little Miami from Morrow to Foster, including much of Mason-Morrow-Millgrove Road.

  6. 25.00 ft

    Flooding occurs along portions of South Main Street, South High Street and King Avenue in South Lebanon. Basement flooding of occurs in riverfront homes of South Lebanon. Flooding also occurs along Front and Miami Streets in Morrow and along longer stretches of Mason-Morrow-Millgrove Road. Todd Fork Creek in Morrow experiences backwater flooding resulting in flooding along Front Street and other low-lying roads.

  7. 26.00 ft

    Flooding along portions of South Main Street, South High Street and King Avenue in South Lebanon is a foot deep or more. Basement flooding of several feet occurs in riverfront homes of South Lebanon. Flooding also occurs along Front and Miami Streets in Morrow and becomes worse along portions of Mason-Morrow-Millgrove Road. Todd Fork Creek in Morrow experiences backwater flooding resulting in flooding along Front Street and other low-lying roads in Morrow.

  8. 29.00 ft

    South Lebanon incurs the worst of the flooding, with some homes inundated along South Main Street and King Avenue in South Lebanon. Long stretches of Mason-Morrow-Millgrove Road is flooded, as well as Front Street in Morrow. Water spills onto Kings Mills Road near Foster.

  9. 32.00 ft

    Major flooding occurs in South Lebanon, especially between McKinley Street and the river. Water is several feet deep into many homes. Flood waters are several feet deep along Mason-Morrow-Millgrove Road, as well as on Front Street in Morrow.

  10. 33.00 ft

    This is roughly equal to the FEMA 1 percent flood. Much of South Lebanon between East Pike Street and the river is flooded, including backwater flooding along Turtle Creek and Dry Run. Long stretches of Mason Morrow Millgrove Road are also flooded, as well as much of the village of Morrow.

Written by the local National Weather Service forecast office for this exact gauge.

Frequently asked questions

Is the Little Miami River flooding at South Lebanon?

No. The Little Miami River at South Lebanon is at 5.49 ft, 9.51 ft below action stage.

What is the flood stage at South Lebanon?

The National Weather Service sets action stage 15 ft, minor flooding 19 ft, moderate flooding 25 ft and major flooding 32 ft.

What is the highest the Little Miami River has been at South Lebanon?

The highest crest on record is 23.2 ft, on 2022-02-18.

Stage and flood information from the NOAA National Weather Service (gauge SLBO1). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.