Nf American River A North Fork Dam flow report
As of July 15, 2026, Nf American River A North Fork Dam is flowing at 93 cfs with a gage height of 0.47 ft. Source: USGS gauge #11427000, refreshed throughout the day.
Historical Data
Nf American River A North Fork Dam at a glance
How Nf American River A North Fork Dam is running right now, where it sits on the map, and the key gauge stats.
Nf American River A North Fork Dam is flowing at 93 cfs, with the water sitting 0.47 ft at the gage.
This is USGS gauge #11427000 in California. Over the past 10 days the average has been 98 cfs, peaking at 112 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the California flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #11427000).
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, Nf American R A North Fork Dam Ca is expected to recede from today's 92 cfs, toward roughly 76 cfs by 2026-07-20 (likely range 34-171 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.
| 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.
Nf American River A North Fork Dam
The primary constituents of the flow are snowmelt and rainfall. The North Fork of the American River is a tributary of the larger American River, which is dammed at Folsom Lake. The flow varies seasonally, with the highest flows occurring in the spring due to snowmelt. The North Fork Dam was built in the 1930s by the Bureau of Reclamation to provide water to nearby agricultural areas. An interesting fact is that the North Fork of the American River is a popular location for whitewater rafting trips.
Nearby streamflow levels
Cross-check Nf American River A North Fork Dam's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Nf American R A North Fork Dam Ca | 93 cfs |
| Dry C A Vernon St Bridge A Roseville Ca | 159 cfs |
| Pilot C Bl Mutton Canyon Nr Georgetown Ca | 2 cfs |
| Bear R Nr Wheatland Ca | 27 cfs |
| Deer C Nr Cameron Park Ca | 8 cfs |
| American R A Fair Oaks Ca | 4,410 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Nf American River A North Fork Dam. 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 |
|---|---|
| Grass Valley No. 2 | 0 in |
| Blue Canyon Alert | — |
| Blue Canyon | 21 in |
| Soda Springs 1.5 Ssw | 0 in |
| Nohrsc Meadow Lk Snow Course | 21 in |
| Nohrsc Css Lab | — |
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 Nf American River A North Fork Dam in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Nf American River A North Fork Dam crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Nf American River A North Fork Dam
Where does the streamflow data for Nf American River A North Fork Dam come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 11427000. 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 Nf American River A North Fork Dam 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 Nf American River A North Fork Dam report
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