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This probabilistic forecast is issued by the Ohio River Forecast Center.
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About this graph
Forecasts for the Great Miami River at Troy are issued routinely year-round.
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Upstream Gauge - at Piqua Upstream Gauge Downstream Gauge Downstream Gauge - near Taylorsville
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 16
Flood Stage: 14
Action Stage: 11.5
Low Stage (in feet): -9999

Historic Crests
(1) 16.58 ft on 12/22/2013
(2) 16.40 ft on 06/11/1958
(3) 16.20 ft on 01/22/1959
(4) 16.08 ft on 07/09/2003
(5) 16.02 ft on 08/08/1995
(6) 15.66 ft on 01/06/2005
(7) 15.49 ft on 12/30/1990
(8) 15.05 ft on 03/06/2011
(9) 15.01 ft on 03/01/2011
(10) 14.88 ft on 04/04/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.88 ft on 04/04/2018
(2) 14.80 ft on 11/19/2017
(3) 14.50 ft on 11/19/2017
(4) 14.04 ft on 12/29/2015
(5) 16.58 ft on 12/22/2013
(6) 15.05 ft on 03/06/2011
(7) 15.01 ft on 03/01/2011
(8) 14.27 ft on 12/01/2006
(9) 15.66 ft on 01/06/2005
(10) 16.08 ft on 07/09/2003
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
22 All levees protecting the City of Troy would be overtopped. Widespread major flooding occurs within Troy and surrounding areas outside of flood protection.
20 This is greater than the FEMA 1 percent flood level. While some areas of the City of Troy are protected by levees to a stage of 22 feet, extensive major flooding outside of protected areas occurs, as most levees are overtopped at 20 feet.
19 This stage is approximately the FEMA 1 percent flood level. While much of Troy is protected to 22 feet, significant flooding of homes and businesses both south and north of Troy along Route 25A occurs. This extends 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.
16 Some homes and businesses are flooded by as much as 1 foot of water along route 25A near the County Fairground north of Troy. Within the City Limits of Troy is protected to a stage of 22 feet by levees.
15 Flooding occurs along County Road 25A south of Troy and Tipp-Elizabeth Road near Tipp City. Additionally, property along the 1700 block of North County Road 25A also begins to flood. Within the city limits of Troy...structures are protected by flood wall to a stage of 20 feet, with some locations protected to 22 feet.
14 Tipp-Elizabeth Road floods between Tipp City and Ohio 202. Water approaches County Road 25A outside of Troy and near Tipp City. The City of Troy is protected by flood walls and levees to 20 feet, with some locations protected to 22 feet.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) River Forecast VS. River Potential
HEFS Ensemble NAEFS Ensemble Outlook vs. Forecast

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

See the Product Description Document link for more details on the interpretation of the 10 day graphics.

Click individual graphics to enlarge.

Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Wilmington Weather Forecast Office
1901 South State Route 134
Wilmington, OH 45177
(937) 383-0031
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Page last modified: 2-Nov-2020 7:30 PM
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