Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Please test our new hydrograph page link at: https://preview.water.noaa.gov/gauges/abcde - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become water.noaa.gov.  Feedback can be provided HERE

Weather Forecast Office Wilmington, OH

Ohio River Forecast Center

Hydrograph

River at a Glance

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Probability Information Short-term Probabilistic Guidance (Experimental) Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period

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Printable Image About this graph Tabular Data (UTC) Tabular Data (EST) Datum: Not Available Metadata

NOTE: River Forecasts typically include ONLY 2 days of future rain from forecast issuance time (lower right of graph). Occasionally 3 days of future rain included. Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions NOTE: Forecasts for the Great Miami River at Troy are issued routinely year-round.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Downstream Gauge

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. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:14 Legend FEMA Layer Gauge Location Disclaimer 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

If you notice any errors in the below information, please contact our Webmaster
22.4	All levees protecting the City of Troy would be overtopped. Widespread major flooding occurs within Troy and surrounding areas outside of flood protection.
20	While some areas of the City of Troy are protected by levees to a stage of 22.4 feet, extensive major flooding outside of protected areas occurs.
19	While much of Troy is protected to 22.4 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 itself...property is protected to a stage of 22.4 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 at least 20 feet, with some locations protected to 22.4 feet.

About This Location

Latitude: 40.040278° N, Longitude: 84.197778° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 14 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 810.1 824.1 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Troy

Additional Information

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 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.

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Significant/Moderate Flood Outlook (next 5 days) Ohio Basin Water Resources Outlook Inundation Mapping Locations Archived Radar/Raingage Precipitation

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Ensemble River Forecasts Snow Depth and Water Equivalent

Collaborative Agencies 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 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:30 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities