Lamprey River near Newmarket, NH
River level and flood forecast · Rockingham County
The river is 6.9 ft below flood stage (8 ft).
Flow: 41 cubic feet per second (USGS).
Normal for October 13.
Usual for October 13: 23 to 153 cubic feet per second (the middle half of 92 years).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Lamprey River near Newmarket to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 16 ft |
| Moderate flood stage | 12 ft |
| Flood stage | 8 ft |
| Action stage | 7 ft |
| Record crest (May 16, 2006) | 18.31 ft |
What floods at each level
From the National Weather Service, highest first.
- 17 ftSevere flooding occurs in Durham, Newmarket, Lee and Epping.
- 15 ftRoute 152 in Lee floods. In Newmarket, Ashswamp Road and the Twin Rivers Condos flood. Flood waters up to 5 feet deep on Bennett Road.
- 13 ftUp to 1 foot of water on Route 108 between Durham and Newmarket.
- 12 ftHomes on Route 108 become isolated. Bennet Road has up to 1 foot of water on it.
- 11.5 ftRoute 108 starts to flood.
- 10 ftBennett Road in Durham starts to flood.
- 8 ftMinor lowland flooding begins.
Highest crests on record
- 18.31 ft — May 16, 2006
- 17.49 ft — April 18, 2007
- 15.14 ft — April 7, 1987
- 14.88 ft — March 20, 1936
- 14.81 ft — March 16, 2010
Recent crests: 10.58 ft (December 20, 2023) · 8.31 ft (May 3, 2023) · 9.24 ft (April 2, 2014) · 14.81 ft (March 16, 2010) · 17.49 ft (April 18, 2007)
Highest flow on record
8,970 cubic feet per second — May 16, 2006. From the USGS's yearly peaks since 1935.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LAMN3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.