Skip Navigation Link  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Navigation Bar End Cap


This probabilistic forecast is issued by the Ohio River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left off Inundation
tab right off tab left on tab right on
Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey
About this graph
Forecasts for the St. Marys River near Fort Wayne are issued as needed during times of high water, but are not routinely available.
Return to Area Map

Upstream Gauge - at Decatur Upstream Gauge
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 19
Moderate Flood Stage: 17
Flood Stage: 14
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests
(1) 21.20 ft on 07/09/2003
(2) 19.88 ft on 06/19/2015
(3) 19.66 ft on 03/14/1982
(4) 19.06 ft on 01/14/2005
(5) 18.33 ft on 02/26/1985
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.91 ft on 07/17/2021
(2) 13.21 ft on 01/12/2020
(3) 15.27 ft on 04/29/2019
(4) 15.27 ft on 04/29/2019
(5) 12.73 ft on 02/21/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.77 ft on 10/04/2008
(2) 0.78 ft on 06/29/2012
(3) 0.80 ft on 10/29/1999
Show More Low Water Records
KML Image
Gauge LocationGauge Map Marker
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 Collapse
If you notice any errors in the below information, please contact our Webmaster
22 Structural damage is done to homes and businesses on the south side of Fort Wayne near the Saint Mary's River. Record flood was set on July 9, 2003 when the river reached 21.2 feet.
20 A major flood is in progress and water is nearing the top of many levees.
19 Flooding reaching major category with isolated evacuations becoming necessary. Some roads and bridges are closed at this level.
18 An increasing number of city streets flood, and evacuations may become necessary. Property damage begins in more areas at this level.
17 Some residents in the Winchester Road area may need to be evacuated. Property damage begins in some areas at this level.
15 Flooding occurs on the lowest unprotected city streets, park drives and county roads.
14 Flooding occurs in parks and low farmland throughout southern Allen County. The City of Fort Wayne starts 24 hour flood fighting procedures.
(1) Upstream view from gauge site
(2) Downstream view from gauge site

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Gauge zero transitioned from 748.97 NGVD29 to 748.41 NAVD88 on July 25, 2012. 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
HEFS Ensemble NAEFS Ensemble Outlook vs. Forecast

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.

To use the USGS flood inundation mapper tool, please visit the following web address:
Collaborative Agencies Collapse
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
Privacy Policy
About Us
Career Opportunities