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.
Gauge Information
Map Overlays
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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.
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Flood Categories (in feet)
Major Flood Stage:
30
Moderate Flood Stage:
27
Flood Stage:
23
Action Stage:
20
Low Stage (in feet):
-9999
Historic Crests
(1) 33.30 ft on 03/25/1913
(2) 31.40 ft on 08/23/2007
(3) 29.75 ft on 06/15/1981
(4) 29.72 ft on 02/11/1959
(5) 29.29 ft on 02/07/2008 Show More Historic Crests
(P): Preliminary values subject to further review.
Recent Crests
(1) 23.80 ft on 05/11/2021 (P)
(2) 25.17 ft on 05/20/2020
(3) 25.32 ft on 04/27/2019
(4) 22.23 ft on 02/22/2018
(5) 27.55 ft on 07/15/2017 Show More Recent Crests
(P): Preliminary values subject to further review.
Low Water Records (1) -2.37 ft on 01/15/1979 (2) -1.50 ft on 02/19/1980 (3) 4.39 ft on 08/28/2020 Show More Low Water Records
Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.
Site-specific information: These inundation maps for the Blanchard River at Ottawa were developed by the Indiana USGS, and made available on this site through funding by the Village of Ottawa and the National Weather Service.
Flood Impacts
If you notice any errors in the below information, please contact our Webmaster
29
Widespread major flooding occurs throughout downtown Ottawa.
27
Flooding worsens on the south side of Ottawa, with water on several roads. Flooding also begins in other areas of Ottawa.
26.6
Flood water begins to hit the bottom of the bridge at the gage site.
25
Flooding begins along south Walnut and west Second Streets on the south side of Ottawa.
23
Lowland flooding occurs mainly in south Ottawa. Flood water also gets into low farmlands.
Per USGS record: All periods of record that are estimated are rated poor. All other periods are rated as follows: For the period Oct. 1, 2014 to Feb. 10, 2016, records good. Feb. 11, 2016 to Dec. 22, 2016 discharge records are good. Dec. 23, 2016 to Feb. 14, 2017 discharge records are fair. Feb. 15, 2017 to May 29, 2017 discharge records are good. May 30, 2017 to Nov. 14, 2017 discharge records are fair. Nov. 15, 2017 to Oct. 30, 2018 discharge records are fair, except for discharges between 700 cfs. and 5900 cfs. which are poor.
Gauge zero transitioned from 699 NGVD29 to 698.43 NAVD88 on Oct 1, 2009.
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.
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
Northern Indiana Weather Forecast Office
7506 E 850 N
Syracuse, IN 46567
(574) 834-1104 Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:30 PM
Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.