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Ashuelot River above West Swanzey

Highest listed crest 12.89 ftFlood stage 11.0 ft10 crests since 1996

The Ashuelot River above West Swanzey crested above flood stage 1 time among the 10 crests the National Weather Service lists from 1996 to 2024. The highest, 12.89 ft on July 19, 2021, was moderate flooding, 1.89 feet above flood stage. 1 other gauge on the Ashuelot River crested above flood stage within a week of it.

The gauge

Highest listed crest
12.89 ft
July 19, 2021; 5,730 cubic feet per second
Flood stage
11.0 ft
Major flooding from 14.0 ft
Crests at major
0
1 above flood stage
Most recent flood crest
July 19, 2021
12.89 ft, moderate flooding
Location
Cheshire County
Near Keene (5.8 mi)

Flood stages

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

Flood categories, Ashuelot River above West Swanzey
Action stage10.01Jul 17, 2023The level at which the NWS or its partners begin to take action
Flood stage (minor)11.00—Minimal or no property damage, but possibly some public threat
Moderate flood stage12.01Jul 19, 2021Some inundation of structures and roads near the stream
Major flood stage14.00—Extensive inundation of structures and roads

Every listed crest

10 crests from 1996 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Ashuelot River above West Swanzey, 1996 to 2024 2468101214ft Flood stage 11.0 ftMajor 14.0 ft Apr 17, 1996: 3.67 ft, below flood stage; 3,620 cubic feet per secondMar 30, 2003: 4.37 ft, below flood stage; 3,270 cubic feet per secondApr 2, 2004: 4.51 ft, below flood stage; 3,490 cubic feet per secondApr 3, 2005: 4.41 ft, below flood stage; 3,330 cubic feet per secondOct 9, 2005: 5.62 ft, below flood stage; 6,210 cubic feet per secondApr 17, 2007: 4.61 ft, below flood stage; 4,360 cubic feet per secondJul 19, 2021: 12.89 ft, moderate flooding; 5,730 cubic feet per secondFeb 24, 2022: 9.01 ft, below flood stage; 2,270 cubic feet per secondJul 17, 2023: 10.67 ft, action stage; 3,540 cubic feet per secondMar 11, 2024: 9.77 ft, below flood stage; 2,700 cubic feet per second Highest, 12.89 ft, Jul 19, 2021 200020052010201520202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Ashuelot River above West Swanzey 1990s: 0 2000s: 0 2010s: 0 2020s: 1 1 1990s2000s2010s2020s
  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, Ashuelot River above West Swanzey
1Jul 19, 202112.89+1.89Moderate5,730
2Jul 17, 202310.67−0.33Action3,540
3Mar 11, 20249.77−1.23Below flood stage2,700
4Feb 24, 20229.01−1.99Below flood stage2,270
5Oct 9, 20055.62−5.38Below flood stage6,210
6Apr 17, 20074.61−6.39Below flood stage4,360
7Apr 2, 20044.51−6.49Below flood stage3,490
8Apr 3, 20054.41−6.59Below flood stage3,330
9Mar 30, 20034.37−6.63Below flood stage3,270
10Apr 17, 19963.67−7.33Below flood stage3,620

The worst floods along the Ashuelot River

For this gauge's highest crests, the other gauges on the Ashuelot River that crested above flood stage within a week.

July 19, 2021: 12.89 ft here, moderate flooding

  • HinsdaleNH · Jul 19, 2021 · 8.82 ft · Minor

Gauges on the Ashuelot River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Ashuelot River
GilsumNH9.511.36 ft, Jul 11, 20230
KeeneNH73.074.60 ft, Oct 9, 20050
West Swanzey this gaugeNH11.012.89 ft, Jul 19, 20210
HinsdaleNH8.020.20 ft, Mar 19, 19362

Other gauges in Cheshire County

Flood gauges in Cheshire County
Hinsdale8.020.20 ft, Mar 19, 19362
Keene73.074.60 ft, Oct 9, 20050
Gilsum9.511.36 ft, Jul 11, 20230
Alstead9.011.78 ft, Jul 29, 20212
North Walpole28.043.80 ft, Mar 19, 19362

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

NOAA National Water Prediction Service, gauge SWAN3, 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.