Meramec River At Pacific Flow Report
As of July 20, 2026, Meramec River At Pacific is flowing at 1,920 cfs with a gage height of 0.64 ft, receding 9% over the past 24 hours. Source: USGS gauge #07017020, refreshed throughout the day.
Historical Data
Meramec River At Pacific at a glance
How Meramec River At Pacific is running right now, where it sits on the map, and the key gauge stats.
Meramec River At Pacific is flowing at 1,920 cfs, with the water sitting 0.64 ft at the gage. Flow is down 9% since yesterday as the gauge recedes.
This is USGS gauge #07017020 in Missouri. Over the past 10 days the average has been 6,871 cfs, peaking at 31,300 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 #07017020).
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, Meramec River At Pacific is expected to recede from today's 2120 cfs, toward roughly 1742 cfs by 2026-07-24 (likely range 887-3420 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.
Meramec River At Pacific
The river receives contributions from numerous tributaries, including the Bourbeuse River, Huzzah Creek, and Big River. The Meramec River at Pacific, MO streamgauge is also affected by the Meramec Dam. Seasonal trends show that the river experiences high flows during the spring and early summer, and low flows during the fall and winter months. Interestingly, the Meramec River is home to the endangered Ozark hellbender salamander, which is a rare sight for hydrologists to observe during their work.
Nearby streamflow levels
Cross-check Meramec River At Pacific's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Meramec River At Pacific | 1,920 cfs |
| Big River At Byrnesville | 356 cfs |
| Meramec River Near Eureka | 2,270 cfs |
| Bonhomme Creek Near Ellisville | 1 cfs |
| Kiefer Creek Near Ballwin | 9 cfs |
| Williams Creek Near Peerless Park | 4 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Meramec River At Pacific. 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 |
|---|---|
| Cottlevile 1s | 0 in |
| Harvester | 0 in |
| Dardenne Prairie | 0 in |
| Festus | 0 in |
| Cap Au Gris Lock & Dam 25 | 0 in |
| Melvin Price Lock And Dam | 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 Meramec River At Pacific in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Meramec River At Pacific crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Meramec River At Pacific
Where does the streamflow data for Meramec River At Pacific come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 07017020. 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 Meramec River At Pacific 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 Meramec River At Pacific report
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