Upper Ammonoosuc River Flow Today
As of October 14, 2026 at 3:30 AM, the Upper Ammonoosuc River is flowing at 340 cfs near Groveton, NH — 218% of normal for the date and up 432% in 24 hours. ❤ Favorite
Upper Ammonoosuc River map
See the Upper Ammonoosuc River on a live map
Every gauge, dam and paddle run on the river, one tap each:
- Gauges now — which reaches are high or low
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Upper Ammonoosuc River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Groveton, the Upper Ammonoosuc River is running 340 cfs — 218% of normal, up 432% since yesterday. Along the river, 1 of 1 reporting gauges are above normal (the typical gauge is at 218% of normal).
In the last 24 hours the river is rising at Groveton (+432%).
How the Upper Ammonoosuc River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Groveton963 ft 340 cfs218%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Upper Ammonoosuc River streamgauge, placed by its own percent of normal. The line is the typical gauge (218%).
Upper Ammonoosuc River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | Elevation |
|---|---|---|---|---|---|
|
Upper Ammonoosuc River Near Groveton NH
Oct 14, 3:30 AM · USGS 01130000 |
340 cfs | 218% | +432% | 2.55 ft | 963 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the Upper Ammonoosuc River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
Upper Ammonoosuc River streamflow over time
Daily total flow across every monitored gauge on the river (this total last updated earlier; the live gauge readings above are current).
Upper Ammonoosuc River
The Upper Ammonoosuc River is a 21.1-mile-long river located in the White Mountains of New Hampshire, USA. The river has a rich history as it was once used by Native Americans as a major travel route. The river is fed by various tributaries and its flow is controlled by a series of reservoirs and dams, including the Forest Lake Dam and the Stark Dam. These reservoirs help regulate the river’s water levels and provide hydropower for the surrounding communities. The Upper Ammonoosuc River is also used for recreational activities such as fishing, kayaking, and swimming. It is home to various species of fish, including brook trout, rainbow trout, and brown trout. Additionally, the river is used for agricultural purposes, with some farmers using its water for irrigation.
About the Upper Ammonoosuc River
How is the Upper Ammonoosuc River flowing right now?
As of October 14, 2026, the Upper Ammonoosuc River is flowing at 340 cfs near Groveton, NH, about 218% of normal for the date. Every gauge’s live reading is in the table above.
Is the Upper Ammonoosuc River running high or low?
The typical gauge on the Upper Ammonoosuc River is at 218% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.