Blanchard River At Gilboa flow report
As of July 13, 2026, Blanchard River At Gilboa is flowing at 577 cfs with a gage height of 6.23 ft, receding 8% over the past 24 hours. Source: USGS gauge #04189131, refreshed throughout the day.
Historical Data
Blanchard River At Gilboa at a glance
How Blanchard River At Gilboa is running right now, where it sits on the map, and the key gauge stats.
Blanchard River At Gilboa is flowing at 577 cfs, with the water sitting 6.23 ft at the gage. Flow is down 8% since yesterday as the gauge recedes.
This is USGS gauge #04189131 in Ohio. Over the past 10 days the average has been 395 cfs, peaking at 642 cfs.
Over the next 5 days, Blanchard River At Gilboa Oh is expected to recede from today's 577 cfs, toward roughly 200 cfs by 2026-07-18 (likely range 45-889 cfs) -- about normal for the date.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Ohio 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.
Blanchard River At Gilboa
The river is a part of the larger Sandusky River watershed and its flow is influenced by precipitation and snowmelt. The main constituents of the river are agricultural runoff and sediment from the surrounding fields. There are no major dams or tributaries that significantly impact the flow of the river in this area. Seasonal trends show that the river has higher flow in the spring due to snowmelt and precipitation, while the flow decreases in the summer and fall. Interestingly, in 2007, the Blanchard River flooded and caused extensive damage to the town of Findlay, OH, prompting discussions about flood control measures in the area.
Nearby streamflow levels
Cross-check Blanchard River At Gilboa's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Blanchard River At Gilboa Oh | 577 cfs |
| Riley Creek Below Pandora Oh | 4 cfs |
| Blanchard River At Ottawa Oh | 604 cfs |
| Blanchard River Near Findlay Oh | 294 cfs |
| Eagle Creek Above Findlay Oh | 9 cfs |
| Ottawa River Near Kalida Oh | 35 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Blanchard River At Gilboa. 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 |
|---|---|
| Bowling Green Wwtp | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Blanchard River At Gilboa.
Boat launches
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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 Blanchard River At Gilboa in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Blanchard River At Gilboa crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Blanchard River At Gilboa
Where does the streamflow data for Blanchard River At Gilboa come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 04189131. 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 Blanchard River At Gilboa 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 Blanchard River At Gilboa report
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