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.

DID YOU KNOW... Please try our new TEST 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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Inundation Mapping

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Printable Image About this graph Tabular Data (UTC) Tabular Data (EST) Datum: NAVD88 Metadata

NOTE: Forecasts for the Raccoon Creek near Granville are issued as needed during times of high water, but are not routinely available.

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Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 17 Moderate Flood Stage: 16 Flood Stage: 13 Action Stage: 10 Low Stage (in feet): -9999 Historic Crests (1) 18.50 ft on 01/23/1959 (P) (2) 16.90 ft on 03/20/2020 (P) (3) 15.50 ft on 01/05/2005 (P) (4) 15.39 ft on 02/18/2022 (P) (5) 15.16 ft on 03/31/2019 (6) 15.07 ft on 05/19/2020 (P) (7) 14.39 ft on 06/14/2022 (P) (8) 14.31 ft on 02/25/2018 (9) 14.20 ft on 12/22/2013 (10) 13.98 ft on 06/21/2015 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 14.39 ft on 06/14/2022 (P) (2) 13.42 ft on 05/06/2022 (P) (3) 13.96 ft on 02/22/2022 (P) (4) 15.39 ft on 02/18/2022 (P) (5) 15.07 ft on 05/19/2020 (P) (6) 16.90 ft on 03/20/2020 (P) (7) 13.36 ft on 03/03/2020 (P) (8) 15.16 ft on 03/31/2019 (9) 13.76 ft on 04/04/2018 (10) 14.31 ft on 02/25/2018 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

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18.5	This level is comparable to the flood of record of January 1959. Lancaster Road, Columbus Road and areas near West Broadway close to the creek are flooded. The Granville Water Treatment Plant and Denison Heat Plant are flooded, as well as businesses along South Main Street. The south buildings of Granville Square Apartments are flooded. Ballfields at the Raccoon Valley Park are also flooded. Water floods some homes along Cherry Valley Road and Cherry Bend Drive near the creek in Granville Township.
17.3	This level is close to the FEMA 1 percent flood with flooding of Lancaster Avenue and Munson Streets, the Granville Lumber Company and the Denison Heat Plant. Granville Milling incurs flooding, as well as the Granville Waste Water Treatment Plant and the water plant property. The south buildings of Granville Square Apartments are flooded. Water approaches homes along Cherry Valley Road and Cherry Bend Drive in Granville Township.
17	The Denison University Heat Plant is flooded as well as the Granville Waste Water Treatment Plant. Granville Square Apartments also incur flooding, with flooding of Granville Lumber and some nearby areas of Munson Street and Lancaster Road. Raccoon Valley Park is completely flooded.
16.5	Flooding begins at the Denison University Heat Plant property with water approaching the south buildings of Granville Square Apartments. Much of the waste water treatment plant is flooded, as well as the water plant near Palmer Lane. Stretches of Route 539A are flooded, as well as the TJ Evans bike trail. Water also approaches homes along Cherry Valley Road near the creek in Granville Township.
16	Water approaches the Denison University Heat Plant on south Main Street, with water approaching the Granville Waste Water Treatment Plant. Water also breaches the TJ Evans bike trail and approaches the Granville Square Apartments. The ball diamonds at Raccoon Valley Park are flooded.
15.5	Portions of Route 539A are flooded with water breaching the bike path on the west side of Granville. Water will approach Granville Square Apartments between the bike path and West Broadway, as well as the waste water treatment plant and the operational building of the Granville Water Plant.
15	Water covers portions of Route 539A and breaches the bike trail west of Granville.
14.5	Water breaches the TJ Evans bike trail west of Granville and floods storage buildings near the Granville water plant. Water also approaches the property of the Denison University power plant.
14	Portions of the TJ Evans bike trail are nearly flooded, with out buildings near the Granville Water Plant flooded.
13	Water encroaches on storage buildings near the Granville Water Plant.

About This Location

Latitude: 40.068889° N, Longitude: 82.551667° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 13 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 901.46 914.46 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 Granville

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