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Souhegan River at Milford

Highest listed crest 12.49 ftFlood stage 9.0 ft7 crests since 2007

The Souhegan River at Milford crested at major flood stage 1 time among the 7 crests the National Weather Service lists from 2007 to 2025. The highest, 12.49 ft on April 16, 2007, was major flooding, 3.49 feet above flood stage. 1 other gauge on the Souhegan River crested above flood stage within a week of it.

The gauge

Highest listed crest
12.49 ft
April 16, 2007; 6,950 cubic feet per second
Flood stage
9.0 ft
Major flooding from 12.0 ft
Crests at major
1
20th of 34 gauges in New Hampshire
Most recent flood crest
December 18, 2023
9.82 ft, minor flooding
Location
Hillsborough County
Near Nashua (12.7 mi)

Flood stages

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

Flood categories, Souhegan River at Milford
Action stage8.01May 10, 2025The level at which the NWS or its partners begin to take action
Flood stage (minor)9.04Dec 18, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage11.01Oct 30, 2017Some inundation of structures and roads near the stream
Major flood stage12.01Apr 16, 2007Extensive inundation of structures and roads

Every listed crest

7 crests from 2007 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Souhegan River at Milford, 2007 to 2025 8910111213ft Flood stage 9.0 ftMajor 12.0 ft Apr 16, 2007: 12.49 ft, major flooding; 6,950 cubic feet per secondApr 14, 2010: 9.93 ft, minor flooding; 4,070 cubic feet per secondMar 7, 2011: 9.20 ft, minor flooding; 3,360 cubic feet per secondOct 30, 2017: 11.17 ft, moderate flooding; 5,846 cubic feet per secondDec 23, 2022: 9.76 ft, minor flooding; 4,056 cubic feet per secondDec 18, 2023: 9.82 ft, minor flooding; 4,116 cubic feet per secondMay 10, 2025: 8.80 ft, action stage; 3,005 cubic feet per second Highest, 12.49 ft, Apr 16, 2007 2010201520202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Souhegan River at Milford 2000s: 1 2010s: 3 3 2020s: 2 2000s2010s2020s
  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, Souhegan River at Milford
1Apr 16, 200712.49+3.49Major6,950
2Oct 30, 201711.17+2.17Moderate5,846
3Apr 14, 20109.93+0.93Minor4,070
4Dec 18, 20239.82+0.82Minor4,116
5Dec 23, 20229.76+0.76Minor4,056
6Mar 7, 20119.20+0.20Minor3,360
7May 10, 20258.80−0.20Action3,005

The worst floods along the Souhegan River

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

April 16, 2007: 12.49 ft here, major flooding

  • MerrimackNH · Apr 17, 2007 · 12.71 ft · Moderate

Gauges on the Souhegan River

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

Flood gauges on the Souhegan River
Milford this gaugeNH9.012.49 ft, Apr 16, 20071
MerrimackNH9.016.20 ft, Mar 19, 19361

Other gauges in Hillsborough County

Flood gauges in Hillsborough County
Peterborough5.515.00 ft, Sep 21, 19381
Goffs Falls11.035.19 ft, Mar 20, 19364
Nashua18.041.30 ft, Mar 20, 19361
Goffstown9.017.52 ft, Sep 21, 19384
Merrimack9.016.20 ft, Mar 19, 19361

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

NOAA National Water Prediction Service, gauge MFDN3, 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.