St Marys River At Walcot Street At Willshire flow report
As of July 16, 2026, St Marys River At Walcot Street At Willshire is flowing at 112 cfs with a gage height of 3.08 ft, receding 20% over the past 24 hours. Source: USGS gauge #04181049, refreshed throughout the day.
Historical Data
St Marys River At Walcot Street At Willshire at a glance
How St Marys River At Walcot Street At Willshire is running right now, where it sits on the map, and the key gauge stats.
St Marys River At Walcot Street At Willshire is flowing at 112 cfs, with the water sitting 3.08 ft at the gage. Flow is down 20% since yesterday as the gauge recedes.
This is USGS gauge #04181049 in Ohio. Over the past 10 days the average has been 67 cfs, peaking at 141 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Ohio flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #04181049).
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.
Streamflow Forecast
Over the next 5 days, St Marys River At Walcot Street At Willshire Oh is expected to recede from today's 112 cfs, toward roughly 81 cfs by 2026-07-21 (likely range 21-319 cfs) -- drier than normal for the date.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
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 At Walcot Street At Willshire
Marys River at Walcot Street in Willshire, OH is a stream gauge that measures the flow of the river. The river is a part of the Maumee River watershed and its constituents include agricultural runoff and urban stormwater. There are no significant tributaries or dams in the immediate area. The river experiences seasonal fluctuations, with higher flows during spring due to snowmelt and rainfall, and lower flows during summer and fall. Interestingly, the St. Marys River is known for its excellent fishing opportunities, including the presence of smallmouth bass and walleye.
Nearby streamflow levels
Cross-check St Marys River At Walcot Street At Willshire's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| St Marys River At Walcot Street At Willshire Oh | 112 cfs |
| St. Marys River At Rockford Oh | 72 cfs |
| St. Marys River At Decatur | 126 cfs |
| Wabash River At Linn Grove | 32 cfs |
| Wabash River Near Bluffton Indiana | — |
| Beaver Creek Near Celina Oh | 2 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near St Marys River At Walcot Street At Willshire. 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 |
|---|---|
| Decatur 1n | 0 in |
| Ossian 2.4 W | 0 in |
| Fort Wayne International Airport | 0 in |
| Fort Wayne 7.0 Ne | 0 in |
| Fort Wayne 2.6 Ne | 0 in |
| Fort Wayne 4.1 Ne | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of St Marys River At Walcot Street At Willshire.
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 At Walcot Street At Willshire 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 At Walcot Street At Willshire crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About St Marys River At Walcot Street At Willshire
Where does the streamflow data for St Marys River At Walcot Street At Willshire come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 04181049. 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 At Walcot Street At Willshire 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 At Walcot Street At Willshire report
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