St. Marys River Near Fort Wayne Flow Report
As of August 25, 2026, St. Marys River Near Fort Wayne is flowing at 1,030 cfs with a gage height of 4.73 ft, holding steady over the past 24 hours. Source: USGS gauge #04182000, refreshed throughout the day.
St. Marys River Near Fort Wayne at a glance
Live reading, 10-day trend, and the key gauge stats — how St. Marys River Near Fort Wayne is running right now.
St. Marys River Near Fort Wayne is flowing at 1,030 cfs, with the water sitting 4.73 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #04182000 in Indiana. Over the past 10 days the average has been 2,188 cfs, peaking at 4,570 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Indiana flow report, or open St. Marys River Near Fort Wayne on the interactive map.
Streamgage details
Historical Data
Streamflow Forecast
Over the next 5 days, St. Marys River Near Fort Wayne is expected to recede from today's 1030 cfs, toward roughly 381 cfs by 2026-08-30 (likely range 157-927 cfs) -- about normal for the date.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
Forecast vs seasonal normal
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #04182000).
Flow-duration & observed peak context
Estimate flows at an ungauged site
Drainage-area ratio transfer from this gauge . Most reliable for hydrologically similar sites in the same watershed with area ratios between roughly 0.5 and 1.5.
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
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 | 1,030 cfs |
| Maumee River At Fort Wayne | 1,010 cfs |
| Maumee River At New Haven | 975 cfs |
| St. Marys River At Decatur | 965 cfs |
| St. Joseph River Near Fort Wayne | 133 cfs |
| Cedar Creek Near Cedarville | 36 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
What is the St. Marys River Near Fort Wayne flow rate right now?
As of August 25, 2026, St. Marys River Near Fort Wayne is flowing at 1,030 cfs. The live value, gage height, and 24-hour trend are shown at the top of this page.
Is the St. Marys River Near Fort Wayne running high or low right now?
Check the percent of median figure on this page: above 100% means St. Marys River Near Fort Wayne is running higher than normal for the date, below 100% means lower. The 24-hour trend shows whether it's rising or falling.
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.
Create a free account, or sign in.
Get the free St. Marys River Near Fort Wayne report — flow alerts, favorites, and history & forecasts, plus the free iPhone app.