Major Flood
17 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
13 ft
Minor Flood
12 ft
Action Stage
9.5 ft
What Floods at Each Level
19 ft
Widespread 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 ft
The 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 ft
While 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 ft
Numerous 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 ft
Some 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 ft
Flooding 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 ft
Flooding 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 ft
Tipp-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'.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Dec 22, 2013 | 16.58 ft | 23,656 cfs |
| Jun 10, 1958 | 16.4 ft | 21,000 cfs |
| Jan 21, 1959 | 16.2 ft | — |
About This Gauge
USGS Site
NWS LID
TRYO1
River
Great Miami River
County
Miami, OH
Coordinates
40.0310°N, 84.1882°W
Get Flood Alerts for Great Miami River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Great Miami River at Troy?
The Great Miami River at Troy gauge is maintained by USGS (site 03262700) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Great Miami River at Troy?
The NWS-defined flood stage for Great Miami River at Troy is 12 feet. Action stage begins at 9.5 feet. Moderate flooding starts at 13 feet, and major flooding at 17 feet.
How do I get alerts when Great Miami River rises?
Download StormCast free on Google Play, go to River Gauges, and add Great Miami River at Troy to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Great Miami River at Troy gauge located?
The gauge is located in Miami County, Ohio at coordinates 40.0310°N, 84.1882°W. USGS site number: 03262700. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Great Miami River
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Source & Notes
Data provided by: Miami Conservancy/USGS, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.
- Due to a gage move, all flood stages/categories will change at this location effective effective October 29, 2025 -- see <a href='https://partnerservices.nws.noaa.gov/products/cache/274-2025/PNSILN/7b460651c2573ce569ce415ca629a6b7'>HERE</a> for details.
- River Forecasts typically include ONLY 2 days of future rain from <u>forecast issuance time</u> (lower right of graph). Occasionally 3 days of future rain included.
- NEW! Click <a href='https://experience.arcgis.com/experience/2d9ca737f5af4878aea3767eb1b96d52/page/City-of-Troy-Area'>Here</a> for Flood Inundation Maps for Troy