Elm River At Westport flow report
As of July 14, 2026, Elm River At Westport is flowing at 84 cfs with a gage height of 4.75 ft, receding 10% over the past 24 hours. Source: USGS gauge #06471500, refreshed throughout the day.
Historical Data
Elm River At Westport at a glance
How Elm River At Westport is running right now, where it sits on the map, and the key gauge stats.
Elm River At Westport is flowing at 84 cfs, with the water sitting 4.75 ft at the gage. Flow is down 10% since yesterday as the gauge recedes.
This is USGS gauge #06471500 in South Dakota. Over the past 10 days the average has been 64 cfs, peaking at 99 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the South Dakota flow report.
Streamflow Forecast
Over the next 5 days, Elm R At Westport Sd is expected to recede from today's 84 cfs, toward roughly 59 cfs by 2026-07-18 (likely range 10-330 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.
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.
Elm River At Westport
The flow is affected by precipitation and snowmelt, making it highly seasonal. The constituents of the river system include the Elm River and potential tributaries. The streamgauge provides important data for flood forecasting and water resource management. There are no significant dams on the Elm River, but the monitoring site is located near the Aberdeen Reservoir. Interesting facts about the hydrology of the Elm River include occasional flash floods and the presence of walleye, northern pike, and smallmouth bass in the river.
Nearby streamflow levels
Cross-check Elm River At Westport's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Elm R At Westport Sd | 84 cfs |
| James R At Columbia Sd | 105 cfs |
| Foot Creek Near Aberdeen | 5 cfs |
| Maple R At Nd-Sd State Line | 25 cfs |
| James River At Nd-Sd State Line | 274 cfs |
| James R Near Stratford Sd | 526 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Elm River At Westport. 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 |
|---|---|
| James River At | 0 in |
| Aberdeen 3e | 0 in |
| Aberdeen-26mi.W | 0 in |
| Andover No. 2 | 0 in |
| Edgeley Ndawn | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Elm River At Westport.
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 Elm River At Westport in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Elm River At Westport crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Elm River At Westport
Where does the streamflow data for Elm River At Westport come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 06471500. 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 Elm River At Westport 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 Elm River At Westport report
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