Connecticut River at North Walpole, NH

The last 7 days and the forecast

NWS forecast issued Mon, Oct 12, 11:14 AM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

What floods at each level

From the National Weather Service, highest first.

• 52.3 ftMaximum reportable stage of river gage.
• 38 ftThis is a life threatening flood. Flooding of this magnitude has not been experienced since the Great New England Hurricane of 1938.
• 34 ftLow lying areas along the river from Walpole to Hinsdale are flooded. Roadways bordering the river may be impassable including stretches of Route 5 in southern Vermont.
• 32 ftExtensive flooding occurs along stretches of Route 5, especially in Westminster, affecting homes and businesses.
• 31 ftLow lying businesses and residences from Walpole and Westminster to the Massachusetts border experience flooding along the river. Significant flooding occurs along route 5 in Vermont, especially in Westminster. Bridges crossing the river could be shut down. Backwater flooding likely along tributary streams.
• 29 ftRoute 5 is inundated with up to 1 foot of water in sections of Westminster. Minor flooding of some farmland along the river occurs from Walpole south to the Massachusetts border.
• 28 ftMinor flooding affects low lying areas along the river from Walpole and Westminster downstream to the Massachusetts border. Portions of low lying roads along the river are affected including Route 5 and some adjacent businesses in Westminster. Farming interests along the river could experience flooding.

Highest crests on record

1. 43.8 ft — March 19, 1936
2. 39.1 ft — September 22, 1938
3. 31.38 ft — August 29, 2011
4. 30.37 ft — March 27, 1953
5. 29.85 ft — April 5, 1960

Recent crests: 24.53 ft (December 19, 2023) · 28.22 ft (July 11, 2023) · 31.38 ft (August 29, 2011) · 25.31 ft (April 23, 2001) · 25.75 ft (April 1, 1998)

Highest flow on record

99,700 cubic feet per second — August 29, 2011. From the USGS's yearly peaks since 1942.

Up and down the river, and nearby

• UpstreamConnecticut River at West Lebanon, NH
• DownstreamConnecticut River at Montague, MA
• Cold River at Alstead, NH
• Williams River near Rockingham, VT
• Ashuelot River near Gilsum, NH
• West River below Townshend Lake, VT
• Black River at North Springfield, VT, VT
• Ashuelot River at Keene, NH
• Ashuelot River above West Swanzey, NH
• Sugar River (NH) at West Claremont, NH