Big River At Irondale Flow Report
As of August 2, 2026, Big River At Irondale is flowing at 90 cfs with a gage height of 1.30 ft, rising 97% over the past 24 hours. Source: USGS gauge #07017200, refreshed throughout the day.
Historical Data
Big River At Irondale at a glance
How Big River At Irondale is running right now, where it sits on the map, and the key gauge stats.
Big River At Irondale is flowing at 90 cfs, with the water sitting 1.30 ft at the gage. Flow is up 97% since yesterday — a rising hydrograph.
This is USGS gauge #07017200 in Missouri. Over the past 10 days the average has been 30 cfs, peaking at 90 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Missouri flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #07017200).
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.
Streamflow Forecast
Over the next 5 days, Big River At Irondale is expected to recede from today's 90 cfs, toward roughly 60 cfs by 2026-08-07 (likely range 17-212 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.
| 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.
Big River At Irondale
The river serves as a source of drinking water, irrigation, and recreation for nearby communities. The river is fed by several tributaries, including the Black River, which increases its flow rate during the wet season. Moreover, the river is also affected by several dams, including the Morse Mill Dam, which regulates the river's flow rate. Interestingly, the river is known for its high concentration of lead contamination, stemming from its proximity to mining sites. As a result, it is important to monitor the river's water quality to ensure the safety of those who rely on it.
Nearby streamflow levels
Cross-check Big River At Irondale's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Big River At Irondale | 90 cfs |
| Big River Below Desloge | 220 cfs |
| East Fork Black River Near Lesterville | 13 cfs |
| Big River Near Richwoods | 1,160 cfs |
| St. Francis River Near Mill Creek | 27 cfs |
| East Fork Black River At Lesterville | 44 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Big River At Irondale. 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 |
|---|---|
| Festus | 0 in |
| Kaskaskia River Navigation Lock | 0 in |
| Chester | 0 in |
| Clearwater Dam - Black Rvr | 0 in |
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 Big River At Irondale in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Big River At Irondale crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Big River At Irondale
What is the Big River At Irondale flow rate right now?
As of August 2, 2026, Big River At Irondale is flowing at 90 cfs. The live value, gage height, and 24-hour trend are shown at the top of this page.
Is the Big River At Irondale running high or low right now?
Check the percent of median figure on this page: above 100% means Big River At Irondale 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 Big River At Irondale come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 07017200. 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 Big River At Irondale 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 Big River At Irondale report
Create your free account to track this river — and everything else you love on the water.
- Flow alerts — get pinged the moment this river hits your range
- Save favorites — every river, lake & snowpack in one place
- Full history & forecasts — plus the free iPhone app