Cockermouth River below Hardy Brook, at Groton, NH

Grafton County, New Hampshire · USGS gauge 01077400 · NWS GRTN3 · New Hampshire river levels

Is Cockermouth River below Hardy Brook, at Groton, NH flooding right now?

Cockermouth River below Hardy Brook, at Groton, NH measured 1.42 ft on 2026-09-11 01:00:00 UTC. That observation was 8.1 ft below its 9.5 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height
1.42 ft
as of 67 min ago
Streamflow
9 cfs
data refreshed 5 min ago

Minor flooding here begins at 9.5 ft, with major flooding at 12 ft. The highest crest on record was 11.82 ft on Mon, Oct 30, 2017.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

CategoryStageCurrent distance
Action8.5 ft7.1 ft below
Minor flood9.5 ft8.1 ft below
Moderate flood10 ft8.6 ft below
Major flood12 ft10.6 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

StageDate
11.82 ft2017-10-30
11.17 ft2011-08-28
9.75 ft2022-12-23
9.25 ft2023-12-18

Nearby gauges

GaugeDistanceCounty
Baker River near Rumney, NH6.4 miGrafton County
Pemigewasset River at Plymouth, NH8.3 miGrafton County
Smith River near Bristol, NH10.4 miMerrimack County
Mink Brook near Etna, NH17.6 miGrafton County
Pemigewasset River at Woodstock, NH20.3 miGrafton County
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast