National Weather Service Advanced Hydrologic Prediction Service

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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 March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

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.

Weather Forecast Office Wilmington, OH

Ohio River Forecast Center

Dense Fog Advisory

Hydrograph

River at a Glance

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About this graph

Tabular Data (UTC)

Tabular Data (EDT)

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.

NOTE: Forecasts for the Great Miami River at Hamilton are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet)

Major Flood Stage:	89.5
Moderate Flood Stage:	82
Flood Stage:	75
Action Stage:	73
Low Stage (in feet):	61

Historic Crests
(1) 79.20 ft on 01/21/1959
(2) 76.60 ft on 03/19/1943
(3) 76.50 ft on 02/26/1929
(4) 76.33 ft on 01/22/1937
(5) 75.95 ft on 01/27/1952
(6) 75.84 ft on 01/05/2004
(7) 75.57 ft on 01/06/2005
(8) 75.41 ft on 05/24/1968
(9) 75.15 ft on 03/19/2008
(10) 74.96 ft on 03/05/1963
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 75.15 ft on 03/19/2008
(2) 72.87 ft on 01/14/2005
(3) 75.57 ft on 01/06/2005
(4) 75.84 ft on 01/05/2004
(5) 74.26 ft on 04/29/1996
(6) 72.10 ft on 08/10/1995
(7) 73.75 ft on 01/31/1982
(8) 75.41 ft on 05/24/1968
(9) 74.96 ft on 03/05/1963
(10) 73.42 ft on 05/08/1961
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -1.70 ft on 10/26/1932
(2) -1.60 ft on 11/19/1934
(3) -1.50 ft on 10/28/1934
(4) -1.50 ft on 08/15/1932
(5) -1.40 ft on 09/12/1925
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:14

	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
90	Water would overtop levees on the south side of Hamilton. Water levels exceeding 90 feet would top all levees protecting the business district resulting in major flooding near the river channel through the entire city. Major flooding occurs, especially near New Miami and Ross, where homes and businesses along the river are suffering major inundation.
89	This elevation is at the top of some levees protecting mainly the southern areas of Hamilton. In addition to major inundation of communities such as New Miami and near Ross, river stages above this level would inundate some areas of Hamilton south of Pershing Avenue along and near Neilan Boulevard. Widespread inundation occurs near Joyce Park and Joe Nuxhall Lane.
84	Flooding worsens in lowland areas in southern Butler County between State Route 128 and the Great Miami River. Flooding also worsens along the river near Ross. The City of Hamilton itself is protected from river flooding up to 89 feet for locations in the southern part of the city, with most of the city protected at stages up to 90 feet.
82	Lowland areas in southern Butler County between State Route 128 and the Great Miami River become flooded. Flooding also occurs along the river near Ross. The City of Hamilton itself is protected from river levels up to 89 feet in the southern sections of the city, while most of the city is protected up to 90 feet.
77	Locations along the river mainly south of the City of Hamilton become flooded. Flooding continues to impact New Miami and Ross. Southern portions of the City of Hamilton are protected by flood walls up to 89 feet, with the majority of the city protected up to a stage of 90 feet.
75	Lowland areas south of Hamilton to Ross continue to flood. Evacuations are possible near New Miami and near Ross. The City of Hamilton itself is protected from river levels up to 89 feet for locations in the southern part of the city, with most of the city protected at stages up to 90 feet.
74	Lowland flooding begins about one mile north of High Street in Hamilton and near Ross, about five miles downstream. Low-lying homes near New Miami and other low-lying areas along the river channel are impacted. The City of Hamilton itself is protected from river levels up to 89 feet for locations in the southern part of the city, with most of the city protected at stages up to 90 feet.
Photos (1) photo of Hamilton river gage (2) How to convert Hamilton gage readings

About This Location

Latitude: 39.391111° N, Longitude: 84.572222° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	75 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	Not Available	Not Available	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	499.9 ft	574.9 ft	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:

Additional Information

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

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

Additional Resources

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
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Page last modified: 2-Nov-2020 7:30 PM

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