Madison River Above Powerplant Near Mcallister flow report
As of July 12, 2026, Madison River Above Powerplant Near Mcallister is flowing at 244 cfs with a gage height of 3.88 ft, rising 6% over the past 24 hours. Source: USGS gauge #06040800, refreshed throughout the day.
Historical Data
Madison River Above Powerplant Near Mcallister at a glance
How Madison River Above Powerplant Near Mcallister is running right now, where it sits on the map, and the key gauge stats.
Madison River Above Powerplant Near Mcallister is flowing at 244 cfs, with the water sitting 3.88 ft at the gage. Flow is up 6% since yesterday — a rising hydrograph.
This is USGS gauge #06040800 in Montana. Over the past 10 days the average has been 167 cfs, peaking at 244 cfs.
Over the next 5 days, Madison River Ab Powerplant Nr Mcallister Mt is expected to hold near today's 244 cfs, toward roughly 221 cfs by 2026-07-17 (likely range 70-697 cfs) -- running well below the seasonal normal.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Montana flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
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.
Madison River Above Powerplant Near Mcallister
The primary constituents of this flow are snowmelt and precipitation. The powerplant is located on the Madison River, which runs through Yellowstone National Park and is fed by several tributaries, including the Firehole, Gibbon, and Nez Perce creeks. Seasonally, the flow is highest in the spring due to snowmelt and can vary greatly depending on precipitation levels. Interestingly, the Madison River is known for its world-class fly fishing and is a popular destination for anglers.
Nearby streamflow levels
Cross-check Madison River Above Powerplant Near Mcallister's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Madison River Ab Powerplant Nr Mcallister Mt | 244 cfs |
| Madison River Bl Ennis Lake Nr Mcallister Mt | 1,190 cfs |
| Willow Creek Near Harrison Mt | 16 cfs |
| Gallatin River Near Gallatin Gateway Mt | 787 cfs |
| Madison River Near Cameron Mt | 1,250 cfs |
| Hyalite C At Hyalite R S Nr Bozeman Mt | 80 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Madison River Above Powerplant Near Mcallister. 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 |
|---|---|
| Ennis | 0 in |
| Lower Twin | 0 in |
| Nohrsc Lower Twin | — |
| Nohrsc Albro Lake | — |
| Albro Lake | 0 in |
| Nohrsc Lone Mountain | — |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Madison River Above Powerplant Near Mcallister.
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 Madison River Above Powerplant Near Mcallister in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Madison River Above Powerplant Near Mcallister crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Madison River Above Powerplant Near Mcallister
Where does the streamflow data for Madison River Above Powerplant Near Mcallister come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 06040800. 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 Madison River Above Powerplant Near Mcallister 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 Madison River Above Powerplant Near Mcallister report
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