Mississippi River At St. Louis flow report
As of July 15, 2026, Mississippi River At St. Louis is flowing at 267,000 cfs with a gage height of 15.62 ft, receding 5% over the past 24 hours. Source: USGS gauge #07010000, refreshed throughout the day.
Historical Data
Mississippi River At St. Louis at a glance
How Mississippi River At St. Louis is running right now, where it sits on the map, and the key gauge stats.
Mississippi River At St. Louis is flowing at 267,000 cfs, with the water sitting 15.62 ft at the gage. Flow is down 5% since yesterday as the gauge recedes.
This is USGS gauge #07010000 in Missouri. Over the past 10 days the average has been 278,200 cfs, peaking at 294,000 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 #07010000).
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, Mississippi River At St. Louis is expected to hold near today's 267000 cfs, toward roughly 246431 cfs by 2026-07-20 (likely range 129952-467312 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.
Mississippi River At St. Louis
Louis, MO streamgauge measures the water flow rate of the river, which is influenced by various factors such as precipitation and snowmelt. The river receives water from many tributaries, including the Missouri River, which joins the Mississippi just upstream of St. Louis. There are also several dams along the river, including the Melvin Price Locks and Dam. Seasonal trends in flow include higher rates in the spring due to snowmelt and lower rates in the summer and fall. Interestingly, the Mississippi River at St. Louis has experienced significant flooding in the past, including a record flood in 1993 that caused billions of dollars in damage.
Nearby streamflow levels
Cross-check Mississippi River At St. Louis's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Mississippi River At St. Louis | 267,000 cfs |
| River Des Peres At St. Louis | 4,340 cfs |
| Engelholm Creek Near Wellston | 0 cfs |
| Maline Creek At Bellefontaine Nbr | 8 cfs |
| River Des Peres Trib. At Pagedale | 2 cfs |
| Deer Creek At Maplewood | 12 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Mississippi River At St. Louis. 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 |
|---|---|
| Melvin Price Lock And Dam | 0 in |
| Mascoutah 1.5 Sse | 0 in |
| Harvester | 0 in |
| Cottlevile 1s | 0 in |
| Festus | 0 in |
| Staunton 4.3 Ssw | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Mississippi River At St. Louis.
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 Mississippi River At St. Louis in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Mississippi River At St. Louis crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Mississippi River At St. Louis
Where does the streamflow data for Mississippi River At St. Louis come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 07010000. 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 Mississippi River At St. Louis 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 Mississippi River At St. Louis report
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