Green Brook At Seeley Mills flow report
As of July 14, 2026, Green Brook At Seeley Mills is flowing at 1 cfs with a gage height of 1.83 ft, receding 19% over the past 24 hours. Source: USGS gauge #01403400, refreshed throughout the day.
Historical Data
Green Brook At Seeley Mills at a glance
How Green Brook At Seeley Mills is running right now, where it sits on the map, and the key gauge stats.
Green Brook At Seeley Mills is flowing at 1 cfs, with the water sitting 1.83 ft at the gage. Flow is down 19% since yesterday as the gauge recedes.
This is USGS gauge #01403400 in New Jersey. Over the past 10 days the average has been 12 cfs, peaking at 102 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the New Jersey flow report.
Streamflow Forecast
Over the next 5 days, Green Brook At Seeley Mills Nj is expected to recede from today's 1 cfs, toward roughly 1 cfs by 2026-07-19 (likely range 0-2 cfs) -- running well below the seasonal normal.
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.
Green Brook At Seeley Mills
The gauge measures the flow of the Green Brook, a tributary of the Raritan River. The main constituents of the stream are precipitation and groundwater, with occasional inputs from stormwater runoff. There are no major tributaries or dams along the Green Brook. The stream shows seasonal trends with higher flows during the winter and spring months due to increased precipitation and snowmelt. Interestingly, the Green Brook at Seeley Mills has been used for fishing and recreation since the 1800s and was once home to a mill that produced paper and textiles.
Nearby streamflow levels
Cross-check Green Brook At Seeley Mills's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Green Brook At Seeley Mills Nj | 1 cfs |
| Stony Brook At Watchung Nj | 2 cfs |
| Passaic River Near Chatham Nj | 44 cfs |
| Rahway River Near Springfield Nj | 7 cfs |
| Canoe Brook Near Summit Nj | 2 cfs |
| Passaic River Near Millington Nj | 13 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Green Brook At Seeley Mills. 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 |
|---|---|
| Mendham 1.5 W | 0 in |
| Randolph Twp 2.0 E | 0 in |
| 0.2 Mi E Of Harrison P.O. Passaic Rvr | 0 in |
| Boonton 1 Se At Reservoir | 0 in |
| Little Falls Twp 0.5 Wnw | 0 in |
| Mount Arlington 0.8 S | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Green Brook At Seeley Mills.
Nearby reservoirs
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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 Green Brook At Seeley Mills in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Green Brook At Seeley Mills crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Green Brook At Seeley Mills
Where does the streamflow data for Green Brook At Seeley Mills come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 01403400. 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 Green Brook At Seeley Mills 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 Green Brook At Seeley Mills report
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