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Lamprey River near Newmarket

Highest listed crest 18.31 ftFlood stage 8.0 ft36 crests since 1936

The Lamprey River near Newmarket crested at major flood stage 2 times among the 36 crests the National Weather Service lists from 1936 to 2023. The highest, 18.31 ft on May 16, 2006, was major flooding, 10.31 feet above flood stage.

The gauge

Highest listed crest
18.31 ft
May 16, 2006; 8,970 cubic feet per second
Flood stage
8.0 ft
Major flooding from 16.0 ft
Crests at major
2
11th of 34 gauges in New Hampshire
Most recent flood crest
December 20, 2023
10.58 ft, minor flooding
Location
Strafford County
Near Dover (6.8 mi), Portsmouth (9.2 mi), Somersworth (10.9 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Lamprey River near Newmarket
Action stage7.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)8.029Dec 20, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage12.05Mar 16, 2010Some inundation of structures and roads near the stream
Major flood stage16.02Apr 18, 2007Extensive inundation of structures and roads

Every listed crest

36 crests from 1936 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Lamprey River near Newmarket, 1936 to 2023 8101214161820ft Flood stage 8.0 ftMajor 16.0 ft Mar 20, 1936: 14.88 ft, moderate flooding; 5,490 cubic feet per secondJul 31, 1938: 10.55 ft, minor flooding; 3,530 cubic feet per secondApr 14, 1940: 8.26 ft, minor flooding; 2,520 cubic feet per secondMar 23, 1948: 8.92 ft, minor flooding; 2,800 cubic feet per secondApr 7, 1952: 8.87 ft, minor flooding; 2,780 cubic feet per secondMar 16, 1953: 9.61 ft, minor flooding; 3,120 cubic feet per secondMay 11, 1954: 11.43 ft, minor flooding; 4,070 cubic feet per secondApr 18, 1956: 9.18 ft, minor flooding; 2,960 cubic feet per secondJan 27, 1958: 8.87 ft, minor flooding; 2,790 cubic feet per secondApr 5, 1959: 9.83 ft, minor flooding; 3,300 cubic feet per secondApr 6, 1960: 11.46 ft, minor flooding; 4,470 cubic feet per secondApr 2, 1962: 9.70 ft, minor flooding; 3,320 cubic feet per secondDec 8, 1962: 8.08 ft, minor flooding; 2,390 cubic feet per secondApr 4, 1967: 8.03 ft, minor flooding; 2,480 cubic feet per secondMar 21, 1968: 9.26 ft, minor flooding; 3,220 cubic feet per secondMar 28, 1969: 8.66 ft, minor flooding; 2,710 cubic feet per secondApr 4, 1973: 9.22 ft, minor flooding; 3,030 cubic feet per secondMar 15, 1977: 12.22 ft, moderate flooding; 5,000 cubic feet per secondMar 9, 1979: 9.11 ft, minor flooding; 2,970 cubic feet per secondFeb 27, 1981: 10.26 ft, minor flooding; 3,670 cubic feet per secondMar 20, 1983: 11.61 ft, minor flooding; 4,570 cubic feet per secondApr 7, 1984: 9.50 ft, minor flooding; 3,200 cubic feet per secondApr 7, 1987: 15.14 ft, moderate flooding; 7,570 cubic feet per secondApr 1, 1993: 9.84 ft, minor flooding; 3,400 cubic feet per secondApr 18, 1996: 8.90 ft, minor flooding; 2,850 cubic feet per secondOct 22, 1996: 14.59 ft, moderate flooding; 7,080 cubic feet per secondJun 15, 1998: 11.52 ft, minor flooding; 4,720 cubic feet per secondMar 25, 2001: 9.36 ft, minor flooding; 3,290 cubic feet per secondApr 3, 2004: 11.54 ft, minor flooding; 4,690 cubic feet per secondApr 4, 2005: 8.24 ft, minor flooding; 2,650 cubic feet per secondMay 16, 2006: 18.31 ft, major flooding; 8,970 cubic feet per secondApr 18, 2007: 17.49 ft, major flooding; 8,450 cubic feet per secondMar 16, 2010: 14.81 ft, moderate flooding; 7,299 cubic feet per secondApr 2, 2014: 9.24 ft, minor flooding; 3,260 cubic feet per secondMay 3, 2023: 8.31 ft, minor flooding; 2,684 cubic feet per secondDec 20, 2023: 10.58 ft, minor flooding; 4,101 cubic feet per second Highest, 18.31 ft, May 16, 2006 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Lamprey River near Newmarket 1930s: 2 1940s: 2 1950s: 6 6 1960s: 6 1970s: 3 1980s: 4 1990s: 4 2000s: 5 2010s: 2 2020s: 2 1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Lamprey River near Newmarket
1May 16, 200618.31+10.31Major8,970
2Apr 18, 200717.49+9.49Major8,450
3Apr 7, 198715.14+7.14Moderate7,570
4Mar 20, 193614.88+6.88Moderate5,490
5Mar 16, 201014.81+6.81Moderate7,299
6Oct 22, 199614.59+6.59Moderate7,080
7Mar 15, 197712.22+4.22Moderate5,000
8Mar 20, 198311.61+3.61Minor4,570
9Apr 3, 200411.54+3.54Minor4,690
10Jun 15, 199811.52+3.52Minor4,720
11Apr 6, 196011.46+3.46Minor4,470
12May 11, 195411.43+3.43Minor4,070
13Dec 20, 202310.58+2.58Minor4,101
14Jul 31, 193810.55+2.55Minor3,530
15Feb 27, 198110.26+2.26Minor3,670
16Apr 1, 19939.84+1.84Minor3,400
17Apr 5, 19599.83+1.83Minor3,300
18Apr 2, 19629.70+1.70Minor3,320
19Mar 16, 19539.61+1.61Minor3,120
20Apr 7, 19849.50+1.50Minor3,200
21Mar 25, 20019.36+1.36Minor3,290
22Mar 21, 19689.26+1.26Minor3,220
23Apr 2, 20149.24+1.24Minor3,260
24Apr 4, 19739.22+1.22Minor3,030
25Apr 18, 19569.18+1.18Minor2,960
26Mar 9, 19799.11+1.11Minor2,970
27Mar 23, 19488.92+0.92Minor2,800
28Apr 18, 19968.90+0.90Minor2,850
29Apr 7, 19528.87+0.87Minor2,780
30Jan 27, 19588.87+0.87Minor2,790
31Mar 28, 19698.66+0.66Minor2,710
32May 3, 20238.31+0.31Minor2,684
33Apr 14, 19408.26+0.26Minor2,520
34Apr 4, 20058.24+0.24Minor2,650
35Dec 8, 19628.08+0.08Minor2,390
36Apr 4, 19678.03+0.03Minor2,480

Strafford County: every hazard · River floods across the country · New Hampshire

NOAA National Water Prediction Service, gauge LAMN3, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.