Major Flood
19 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
17 ft
Minor Flood
14 ft
Action Stage
12 ft
What Floods at Each Level
22 ft
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 ft
A major flood is in progress and water is nearing the top of many levees.
19 ft
Flooding reaching major category with isolated evacuations becoming necessary. Some roads and bridges are closed at this level.
18 ft
An increasing number of city streets flood, and evacuations may become necessary. Property damage begins in more areas at this level.
17 ft
Some residents in the Winchester Road area may need to be evacuated. Property damage begins in some areas at this level.
15 ft
Flooding occurs on the lowest unprotected city streets, park drives and county roads.
14 ft
Flooding occurs in parks and low farmland throughout southern Allen County. The City of Fort Wayne starts 24 hour flood fighting procedures.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jul 9, 2003 | 21.2 ft | — |
| Jun 19, 2015 | 19.88 ft | 13,100 cfs |
| Mar 13, 1982 | 19.66 ft | 12,600 cfs |
Flood Inundation Map
NOAA has mapped what areas flood at different water levels for this gauge. View the interactive flood inundation map →
About This Gauge
Get Flood Alerts for St. Marys River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of St. Marys River near Fort Wayne?
The St. Marys River near Fort Wayne gauge is maintained by USGS (site 04182000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for St. Marys River near Fort Wayne?
The NWS-defined flood stage for St. Marys River near Fort Wayne is 14 feet. Action stage begins at 12 feet. Moderate flooding starts at 17 feet, and major flooding at 19 feet.
How do I get alerts when St. Marys River rises?
Download StormCast free on Google Play, go to River Gauges, and add St. Marys River near Fort Wayne to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the St. Marys River near Fort Wayne gauge located?
The gauge is located in Allen County, Indiana at coordinates 40.9878°N, 85.1119°W. USGS site number: 04182000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on St. Marys River
On This River
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Source & Notes
Data provided by: the USGS (04182000), Observations courtesy of U.S. Geological Survey
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
- Stage may be affected by ice during winter months.