Great Miami River at Troy, OH
River level and flood forecast · Miami County
Normal2.7 ftas of Mon 3 PM
The river is 9.3 ft below flood stage (12 ft).
Forecast to hold near 2.7 ft through Sat, Oct 17, 8 AM.
Flow: 307 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 10:22 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 17 ft |
| Moderate flood stage | 13 ft |
| Flood stage | 12 ft |
| Action stage | 9.5 ft |
| Record crest (April 6, 2025) | 13.14 ft |
What floods at each level
From the National Weather Service, highest first.
- 19 ftWidespread flooding behind the levee occurs, with hundreds of homes and businesses affected. Flooding also occurs east of the river east of Stonyridge Avenue. Widespread flooding of homes and businesses with water several feet deep occurs.
- 18 ftThe Troy levee is overtopped from near Main Street to along South Market Street within Troy itself. Significant flooding of homes and businesses both south and north of Troy along Route 25A worsens, with many structures flooded, from near Eldean to near the county fairgrounds, and then along 25A south of South Market Street. On the east bank of the river, extensive flooding between route 202 and the river occurs.
- 17 ftWhile the levee protected areas of Troy are protected to approximately 17.5 feet, significant flooding of homes and businesses both south and north of Troy along Route 25A occurs from Eldean to near the Fairgrounds, and also along 25A south of South Market Street. On the east bank of the river, extensive flooding between route 202 and the river occurs.
- 16 ftNumerous homes and businesses are flooded with several feet of water along route 25A near the County Fairgrounds north of Troy, with flooding along East State Route 41 and Route 202. Within the levee protected areas of Troy...property is protected to a stage of roughly 17.5 feet.
- 15 ftSome homes and businesses are flooded by as much as 1 foot of water along route 25A near the County Fairgrounds north of Troy, with the Fairgounds also flooded. Extensive flooding also occurs elsewhere on Route 25A, Lytle Road, East State Route 41, Tipp Elizabeth Road and Route 202, leaving several homes cut off. Within the levee protected areas of of Troy...structures are protected to a stage of about 17.5 feet.
- 14 ftFlooding of some homes and businesses occurs north of Troy near the county fairgrounds on 25A or North Elm Street, with extensive flooding ongoing elsewhere along Route 25A and Eldean Road. Some farm houses along Route 202 are cut off. Extensive flooding of Miami Shores Golf Course Within the levee protected areas of Troy, protection exists to a stage of about 17.5 feet.
- 13 ftFlooding occurs along County Road 25A south of Troy and Tipp-Elizabeth Road near Tipp City. Property along the 600 block of North County Road 25A near the Fairgrounds begins to flood, with East State Route 571 also flooded. Portions of Farver Road and Covered Bridge park north of Troy are flooded, as well as Eldean Road. Within the levee protected areas of of Troy...structures are protected to a stage of approximately 17.5 feet.
- 12 ftTipp-Elizabeth Road floods between Tipp City and Ohio 202, with water also covering Route 202 south of Route 41. Water approaches County Road 25A outside of Troy and near Tipp City. East State Route 571 is also flooded. The Levee protected area of Troy is protected to a stage of approximately 17.5'.
Highest crests on record
- 13.14 ft — April 6, 2025
- 12.73 ft — April 3, 2024
Recent crests: 13.14 ft (April 6, 2025) · 12.73 ft (April 3, 2024)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (TRYO1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.