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Hydrograph River at a Glance Download  
Olentangy River near Delaware Observed crest: 3.04 ft at 1:00pm Nov 20 Observed: 3.04 ft at 1:00pm Nov 20 Observed: 3.04 ft at 1:30pm Nov 20 Observed: 3.04 ft at 2:00pm Nov 20 Observed: 3.04 ft at 2:30pm Nov 20 Observed: 3.04 ft at 3:00pm Nov 20 Observed: 2.74 ft at 3:30pm Nov 20 Observed: 2.73 ft at 4:00pm Nov 20 Observed: 2.72 ft at 4:30pm Nov 20 Observed: 2.71 ft at 5:00pm Nov 20 Observed: 2.71 ft at 5:30pm Nov 20 Observed: 2.71 ft at 6:00pm Nov 20 Observed: 2.71 ft at 6:30pm Nov 20 Observed: 2.71 ft at 7:00pm Nov 20 Observed: 2.71 ft at 7:30pm Nov 20 Observed: 2.71 ft at 8:00pm Nov 20 Observed: 2.71 ft at 8:30pm Nov 20 Observed: 2.71 ft at 9:00pm Nov 20 Observed: 2.71 ft at 9:30pm Nov 20 Observed: 2.71 ft at 10:00pm Nov 20 Observed: 2.71 ft at 10:30pm Nov 20 Observed: 2.71 ft at 11:00pm Nov 20 Observed: 2.71 ft at 11:30pm Nov 20 Observed: 2.71 ft at 12:00am Nov 21 Observed: 2.71 ft at 12:30am Nov 21 Observed: 2.71 ft at 1:00am Nov 21 Observed: 2.71 ft at 1:30am Nov 21 Observed: 2.71 ft at 2:00am Nov 21 Observed: 2.71 ft at 2:30am Nov 21 Observed: 2.71 ft at 3:00am Nov 21 Observed: 2.71 ft at 3:30am Nov 21 Observed: 2.71 ft at 4:00am Nov 21 Observed: 2.71 ft at 4:30am Nov 21 Observed: 2.71 ft at 5:00am Nov 21 Observed: 2.71 ft at 5:30am Nov 21 Observed: 2.71 ft at 6:00am Nov 21 Observed: 2.71 ft at 6:30am Nov 21 Observed: 2.71 ft at 7:00am Nov 21 Observed: 2.71 ft at 7:30am Nov 21 Observed: 2.71 ft at 8:00am Nov 21 Observed: 2.71 ft at 8:30am Nov 21 Observed: 2.71 ft at 9:00am Nov 21 Observed: 2.71 ft at 9:30am Nov 21 Observed: 2.71 ft at 10:00am Nov 21 Observed: 2.71 ft at 10:30am Nov 21 Observed: 2.71 ft at 11:00am Nov 21 Observed: 2.71 ft at 11:30am Nov 21 Observed: 2.71 ft at 12:00pm Nov 21 Observed: 2.71 ft at 12:30pm Nov 21 Observed: 2.71 ft at 1:00pm Nov 21 Observed: 2.71 ft at 1:30pm Nov 21 Observed: 2.71 ft at 2:00pm Nov 21 Observed: 2.71 ft at 2:30pm Nov 21 Observed: 2.71 ft at 3:00pm Nov 21 Observed: 2.71 ft at 3:30pm Nov 21 Observed: 2.71 ft at 4:00pm Nov 21 Observed: 2.71 ft at 4:30pm Nov 21 Observed: 2.71 ft at 5:00pm Nov 21 Observed: 2.71 ft at 5:30pm Nov 21 Observed: 2.71 ft at 6:00pm Nov 21 Observed: 2.71 ft at 6:30pm Nov 21 Observed: 2.7 ft at 7:00pm Nov 21 Observed: 2.69 ft at 7:30pm Nov 21 Observed: 2.69 ft at 8:00pm Nov 21 Observed: 2.69 ft at 8:30pm Nov 21 Observed: 2.69 ft at 9:00pm Nov 21 Observed: 2.69 ft at 9:30pm Nov 21 Observed: 2.69 ft at 10:00pm Nov 21 Observed: 2.69 ft at 10:30pm Nov 21 Observed: 2.69 ft at 11:00pm Nov 21 Observed: 2.69 ft at 11:30pm Nov 21 Observed: 2.69 ft at 12:00am Nov 22 Observed: 2.69 ft at 12:30am Nov 22 Observed: 2.69 ft at 1:00am Nov 22 Observed: 2.69 ft at 1:30am Nov 22 Observed: 2.69 ft at 2:00am Nov 22 Observed: 2.69 ft at 2:30am Nov 22 Observed: 2.69 ft at 3:00am Nov 22 Observed: 2.69 ft at 3:30am Nov 22 Observed: 2.69 ft at 4:00am Nov 22 Observed: 2.69 ft at 4:30am Nov 22 Observed: 2.69 ft at 5:00am Nov 22 Observed: 2.69 ft at 5:30am Nov 22 Observed: 2.69 ft at 6:00am Nov 22 Observed: 2.69 ft at 6:30am Nov 22 Observed: 2.69 ft at 7:00am Nov 22 Observed: 2.69 ft at 7:30am Nov 22 Observed: 2.69 ft at 8:00am Nov 22 Observed: 2.69 ft at 8:30am Nov 22 Observed: 2.69 ft at 9:00am Nov 22 Observed: 2.69 ft at 9:30am Nov 22 Observed: 2.69 ft at 10:00am Nov 22 Observed: 2.69 ft at 10:30am Nov 22 Observed: 2.69 ft at 11:00am Nov 22 Observed: 2.69 ft at 11:30am Nov 22 Observed: 2.69 ft at 12:00pm Nov 22 Observed: 2.69 ft at 12:30pm Nov 22 Observed: 2.69 ft at 1:00pm Nov 22 Observed: 2.69 ft at 1:30pm Nov 22 Observed: 2.69 ft at 2:00pm Nov 22 Observed: 2.69 ft at 2:30pm Nov 22 Observed: 2.69 ft at 3:00pm Nov 22 Observed: 2.69 ft at 3:30pm Nov 22 Observed: 2.69 ft at 4:00pm Nov 22 Observed: 2.69 ft at 4:30pm Nov 22 Observed: 2.69 ft at 5:00pm Nov 22 Observed: 2.69 ft at 5:30pm Nov 22 Observed: 2.69 ft at 6:00pm Nov 22 Observed: 2.69 ft at 6:30pm Nov 22 Observed: 2.69 ft at 7:00pm Nov 22 Observed: 2.69 ft at 7:30pm Nov 22 Observed: 2.69 ft at 8:00pm Nov 22 Observed: 2.69 ft at 8:30pm Nov 22 Observed: 2.69 ft at 9:00pm Nov 22 Observed: 2.69 ft at 9:30pm Nov 22 Observed: 2.69 ft at 10:00pm Nov 22 Observed: 2.69 ft at 10:30pm Nov 22 Observed: 2.69 ft at 11:00pm Nov 22 Observed: 2.69 ft at 11:30pm Nov 22 Observed: 2.69 ft at 12:00am Nov 23 Observed: 2.69 ft at 12:30am Nov 23 Observed: 2.69 ft at 1:00am Nov 23 Observed: 2.69 ft at 1:30am Nov 23 Observed: 2.69 ft at 2:00am Nov 23 Observed: 2.69 ft at 2:30am Nov 23 Observed: 2.69 ft at 3:00am Nov 23 Observed: 2.69 ft at 3:30am Nov 23 Observed: 2.69 ft at 4:00am Nov 23 Observed: 2.69 ft at 4:30am Nov 23 Observed: 2.69 ft at 5:00am Nov 23 Observed: 2.69 ft at 5:30am Nov 23 Observed: 2.69 ft at 6:00am Nov 23 Observed: 2.69 ft at 6:30am Nov 23 Observed: 2.69 ft at 7:00am Nov 23 Observed: 2.69 ft at 7:30am Nov 23 Observed: 2.38 ft at 8:00am Nov 23 Observed: 2.23 ft at 8:30am Nov 23 Observed: 2.22 ft at 9:00am Nov 23 Observed: 2.22 ft at 9:30am Nov 23 Observed: 2.21 ft at 10:00am Nov 23 Observed: 2.21 ft at 10:30am Nov 23 Observed: 2.21 ft at 11:00am Nov 23 Observed: 2.21 ft at 11:30am Nov 23 Observed: 2.21 ft at 12:00pm Nov 23 Graph Created (12:50pm Nov 23, 2009) Observed DELO1 (plotting HTIRG) Gage 0 Datum: 848.58 Latest observed value: 2.21 ft at 12:00 PM EST 23-Nov-2009. Flood Stage is 9.0 ft. Tailwater (ft)
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NOTE: Forecasts are not available for the Olentangy River near Delaware. Only observed stages are available for this point.

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Upstream Gauge - at Claridon Upstream Gauge Downstream Gauge Downstream Gauge - near Worthington

Flood Categories (in feet)
Major Flood Stage:18
Moderate Flood Stage:13
Flood Stage:9

Historical Crests
(1) 25.50 ft on 03/25/1913
(2) 14.90 ft on 03/21/1917
(3) 14.20 ft on 02/26/1926
(4) 13.10 ft on 01/15/1937
(5) 10.20 ft on 01/21/1959
(6) 7.60 ft on 07/23/1993

Low Water Records
(1) -0.5 ft on 08/31/1921
(2) -0.2 ft on 08/09/1922
(3) -0.1 ft on 01/01/1914

 Olentangy River near Delaware location map

About This Location Collapse
Latitude: 40.355060° N, Longitude: 83.067100° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 9 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 N/A N/A Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 848.580017089844 ft 857.580017089844 ft Older USGS topographic maps, NGVD29 benchmarks
MSL N/A N/A Older USGS topographic maps, MSL benchmarks
Other N/A N/A  

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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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