Is the Merrimack River flooding?
The Merrimack River is tracked by 3 USGS streamgauges in New Hampshire. This page compares each gauge’s live water level against its official National Weather Service flood stage, refreshed every 15 minutes, so you can tell whether the Merrimack River is running normal, rising toward flood stage, or already flooding. 3 of 3 gauges have both a usable water-level reading and a published minor flood stage. Gauges without a published flood stage show water level and flow only. For nearby rivers, see all New Hampshire river levels.
River facts
The longest-running gauge on this river is Merrimack River at Franklin Junction, NH. The highest level ever recorded there was 36.40 ft on 19 March 1936, carrying 83,000 cfs. Peak records there go back to 1904 (117 annual peaks). It is currently at 3.73 ft, 32.7 ft below that record.
| Gauge | Status | Stage | Flood stage | Updated |
|---|---|---|---|---|
| Merrimack River at Franklin Junction, NH | No flooding | 3.73 ft | 16 ft | |
| Merrimack River near Goffs Falls, below Manchester, NH | No flooding | 3.42 ft | 11 ft | |
| Merrimack River at Nashua, NH | No flooding | 4.63 ft | 18 ft |