St. Marys River Near Fort Wayne flow report
As of July 13, 2026, St. Marys River Near Fort Wayne is flowing at 115 cfs with a gage height of 1.52 ft, receding 20% over the past 24 hours. Source: USGS gauge #04182000, refreshed throughout the day.
Historical Data
St. Marys River Near Fort Wayne at a glance
How St. Marys River Near Fort Wayne is running right now, where it sits on the map, and the key gauge stats.
St. Marys River Near Fort Wayne is flowing at 115 cfs, with the water sitting 1.52 ft at the gage. Flow is down 20% since yesterday as the gauge recedes.
This is USGS gauge #04182000 in Indiana. Over the past 10 days the average has been 114 cfs, peaking at 158 cfs.
Over the next 5 days, St. Marys River Near Fort Wayne is expected to recede from today's 115 cfs, toward roughly 83 cfs by 2026-07-18 (likely range 12-554 cfs) -- drier than normal for the date.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Indiana flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
St. Marys River Near Fort Wayne
Marys River, located near Fort Wayne, IN, has a streamgauge that provides information about water flow. The river is made up of several constituents, including tributaries and dams that contribute to its overall flow. Seasonal trends show that water levels are typically higher during the spring months, while they are lower in the fall. One interesting fact about the St. Marys River is that it is considered to be one of the most polluted rivers in Indiana, largely due to agricultural runoff and industrial waste. Despite this, efforts are underway to improve the quality of the water and restore the river's natural habitat.
Nearby streamflow levels
Cross-check St. Marys River Near Fort Wayne's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| St. Marys River Near Fort Wayne | 115 cfs |
| Maumee River At Fort Wayne | 667 cfs |
| Maumee River At New Haven | 808 cfs |
| St. Marys River At Decatur | 67 cfs |
| St. Joseph River Near Fort Wayne | 940 cfs |
| Cedar Creek Near Cedarville | 47 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near St. Marys River Near Fort Wayne. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Fort Wayne International Airport | 0 in |
| Fort Wayne 2.6 Ne | 0 in |
| Fort Wayne 5.4 Wsw | 0 in |
| Fort Wayne 4.1 Ne | 0 in |
| Ossian 2.4 W | 0 in |
| Fort Wayne 7.0 Ne | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of St. Marys River Near Fort Wayne.
Boat launches
See all →
River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track St. Marys River Near Fort Wayne in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when St. Marys River Near Fort Wayne crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About St. Marys River Near Fort Wayne
Where does the streamflow data for St. Marys River Near Fort Wayne come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 04182000. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when St. Marys River Near Fort Wayne rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free St. Marys River Near Fort Wayne report
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