(coe) Atchafalaya River At Simmesport Flow Report
As of September 11, 2026, (coe) Atchafalaya River At Simmesport is flowing at 111,000 cfs with a gage height of 7.28 ft, receding 5% over the past 24 hours. Source: USGS gauge #07381490, refreshed throughout the day.
(coe) Atchafalaya River At Simmesport at a glance
Live reading, 10-day trend, and the key gauge stats — how (coe) Atchafalaya River At Simmesport is running right now.
(coe) Atchafalaya River At Simmesport is flowing at 111,000 cfs, with the water sitting 7.28 ft at the gage. Flow is down 5% since yesterday as the gauge recedes.
This is USGS gauge #07381490 in Louisiana. Over the past 10 days the average has been 143,600 cfs, peaking at 176,000 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Louisiana flow report, or open (coe) Atchafalaya River At Simmesport on the interactive map.
Streamgage details
Historical Data
Streamflow Forecast
Over the next 5 days, (Coe) Atchafalaya River At Simmesport is expected to hold near today's 118000 cfs, toward roughly 113669 cfs by 2026-09-15 (likely range 76879-168062 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.
Forecast vs seasonal normal
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #07381490).
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.
(coe) Atchafalaya River At Simmesport
The river has been dammed at the Old River Control Structure, which diverts water into the Mississippi River to prevent the Atchafalaya from becoming the main channel. Seasonal trends show higher flows in the spring due to snowmelt and increased precipitation. The Atchafalaya Basin is the largest wetland and swamp in the United States and is home to numerous plant and animal species, including the iconic Louisiana alligator. The hydrology of the Atchafalaya River and its basin is complex, with unique features such as the Morganza Spillway, which can be opened during high water events to divert flow away from populated areas.
Nearby streamflow levels
Cross-check (coe) Atchafalaya River At Simmesport's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| (coe) Atchafalaya River At Simmesport | 111,000 cfs |
| Bayou Des Glaises Diversion Ch. At Moreauville | 132 cfs |
| Bayou Courtableau At Washington | 252 cfs |
| Buffalo River Near Woodville | 34 cfs |
| Bayou Cocodrie Near Clearwater | 68 cfs |
| Homochitto River At Rosetta | 282 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near (coe) Atchafalaya River At Simmesport. 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 |
|---|---|
| Bunkie | 0 in |
| Black River Near Jonesville L/D | 0 in |
| Church Point 0.7 Wsw | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of (coe) Atchafalaya River At Simmesport.
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 (coe) Atchafalaya River At Simmesport in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when (coe) Atchafalaya River At Simmesport crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About (coe) Atchafalaya River At Simmesport
What is the (coe) Atchafalaya River At Simmesport flow rate right now?
As of September 11, 2026, (coe) Atchafalaya River At Simmesport is flowing at 111,000 cfs. The live value, gage height, and 24-hour trend are shown at the top of this page.
Is the (coe) Atchafalaya River At Simmesport running high or low right now?
Check the percent of median figure on this page: above 100% means (coe) Atchafalaya River At Simmesport 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 (coe) Atchafalaya River At Simmesport come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 07381490. 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 (coe) Atchafalaya River At Simmesport 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.
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Get the free (Coe) Atchafalaya River At Simmesport report — flow alerts, favorites, and history & forecasts, plus the free iPhone app.