Au Sable River Near Au Sable Flow Report
As of July 21, 2026, Au Sable River Near Au Sable is flowing at 1,420 cfs with a gage height of 8.82 ft, holding steady over the past 24 hours. Source: USGS gauge #04137500, refreshed throughout the day.
Historical Data
Au Sable River Near Au Sable at a glance
How Au Sable River Near Au Sable is running right now, where it sits on the map, and the key gauge stats.
Au Sable River Near Au Sable is flowing at 1,420 cfs, with the water sitting 8.82 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #04137500 in Michigan. Over the past 10 days the average has been 1,382 cfs, peaking at 1,500 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Michigan flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #04137500).
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, Au Sable River Near Au Sable is expected to recede from today's 1460 cfs, toward roughly 1241 cfs by 2026-07-25 (likely range 953-1616 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.
Au Sable River Near Au Sable
The river is fed by several tributaries including the East Branch, Middle Branch, and West Branch. The primary constituents of the river are rain and snowmelt. The river also passes through several dams, including the Cooke Hydroelectric Dam and the Foote Dam. The flow of the river varies seasonally with the highest flows occurring in the spring due to snowmelt and the lowest flows occurring in the fall. The Au Sable River is known for its clear, cold water and is home to a variety of fish species, including brook and brown trout. Interesting fact: The river was named by French explorers, who called it "Au Sable" meaning "sandy" in reference to the riverbed.
Nearby streamflow levels
Cross-check Au Sable River Near Au Sable's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Au Sable River Near Au Sable | 1,420 cfs |
| Au Sable River Near Curtisville | 1,240 cfs |
| Au Sable River Near Mc Kinley | 1,230 cfs |
| Pigeon R Near Caseville | 64 cfs |
| Au Sable River At Mio | 1,060 cfs |
| Rifle River Near Sterling | 220 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Au Sable River Near Au Sable. 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 |
|---|---|
| East Tawas | 0 in |
| Loud Dam | 0 in |
| Glennie 2se | 0 in |
| Harrisville 2nne | 0 in |
| Mio Wwtp | 0 in |
| Case Drain-Boartman Crk | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Au Sable River Near Au Sable.
Boat launches
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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 Au Sable River Near Au Sable in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Au Sable River Near Au Sable crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Au Sable River Near Au Sable
Where does the streamflow data for Au Sable River Near Au Sable come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 04137500. 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 Au Sable River Near Au Sable 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 Au Sable River Near Au Sable report
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