South Fork Newaukum River Near Onalaska flow report
As of July 13, 2026, South Fork Newaukum River Near Onalaska is flowing at 182 cfs with a gage height of 534.33 ft, receding 5% over the past 24 hours. Source: USGS gauge #12024000, refreshed throughout the day.
Historical Data
South Fork Newaukum River Near Onalaska at a glance
How South Fork Newaukum River Near Onalaska is running right now, where it sits on the map, and the key gauge stats.
South Fork Newaukum River Near Onalaska is flowing at 182 cfs, with the water sitting 534.33 ft at the gage. Flow is down 5% since yesterday as the gauge recedes.
This is USGS gauge #12024000 in Washington. Over the past 10 days the average has been 229 cfs, peaking at 336 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Washington flow report.
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.
South Fork Newaukum River Near Onalaska
The river is fed by numerous small tributaries and has no major dams. The flow of the river is influenced by seasonal trends, with higher flows during the wetter months and lower flows during the drier months. Interestingly, the river has been known to experience flash floods during heavy rain events, which can be dangerous for recreational users. Overall, the South Fork Newaukum River is an important source of water for the surrounding community and provides valuable data for hydrological research.
Nearby streamflow levels
Cross-check South Fork Newaukum River Near Onalaska's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| South Fork Newaukum River Near Onalaska | 182 cfs |
| Cowlitz River Below Mayfield Dam | 2,300 cfs |
| Nf Newaukum River Above Bear Creek Near Forest | 73 cfs |
| Tilton River Ab Bear Canyon Creek Near Cinebar | 114 cfs |
| Newaukum River Near Chehalis | 64 cfs |
| Skookumchuck River Near Vail | 35 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near South Fork Newaukum River Near Onalaska. 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 |
|---|---|
| Spirit Lake Tunnel Outlet On S Coldwater Crk | — |
| Spirit Lake | 0 in |
| Kelso-Longview Airport | 0 in |
| Nohrsc Sheep Canyon | 0 in |
| Sheep Canyon | 0 in |
| Swift Creek | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of South Fork Newaukum River Near Onalaska.
Nearby reservoirs
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Boat launches
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River runs
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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 South Fork Newaukum River Near Onalaska in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when South Fork Newaukum River Near Onalaska crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About South Fork Newaukum River Near Onalaska
Where does the streamflow data for South Fork Newaukum River Near Onalaska come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 12024000. 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 South Fork Newaukum River Near Onalaska 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 South Fork Newaukum River Near Onalaska report
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