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Millstone River at Weston

Highest listed crest 23.75 ftFlood stage 11.5 ft17 crests since 1938

The Millstone River at Weston crested at major flood stage 7 times among the 17 crests the National Weather Service lists from 1938 to 2024. The highest, 23.75 ft on September 2, 2021, was major flooding, 12.25 feet above flood stage. 3 other gauges on the Millstone River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
23.75 ft
September 2, 2021
Flood stage
11.5 ft
Major flooding from 17.0 ft
Crests at major
7
16th of 125 gauges in New Jersey
Most recent flood crest
January 10, 2024
15.80 ft, moderate flooding
Location
Somerset County
Near Manville (0.8 mi), Somerville (2.9 mi), Bound Brook (3.8 mi)

Flood stages

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

Flood categories, Millstone River at Weston
Action stage10.01Jun 5, 2003The level at which the NWS or its partners begin to take action
Flood stage (minor)11.53Dec 28, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage13.06Jan 10, 2024Some inundation of structures and roads near the stream
Major flood stage17.07Sep 2, 2021Extensive inundation of structures and roads

Every listed crest

17 crests from 1938 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Millstone River at Weston, 1938 to 2024 10152025ft Flood stage 11.5 ftMajor 17.0 ft Sep 22, 1938: 16.30 ft, moderate floodingAug 28, 1971: 19.60 ft, major floodingOct 20, 1996: 17.94 ft, major floodingSep 17, 1999: 23.21 ft, major floodingJun 5, 2003: 10.93 ft, action stageApr 3, 2005: 13.60 ft, moderate floodingApr 16, 2007: 20.20 ft, major floodingMar 14, 2010: 17.85 ft, major floodingAug 28, 2011: 22.90 ft, major floodingMay 1, 2014: 16.72 ft, moderate floodingNov 25, 2018: 12.83 ft, minor floodingAug 24, 2021: 14.09 ft, moderate floodingSep 2, 2021: 23.75 ft, major floodingApr 8, 2022: 12.76 ft, minor floodingDec 19, 2023: 15.98 ft, moderate floodingDec 28, 2023: 12.38 ft, minor floodingJan 10, 2024: 15.80 ft, moderate flooding Highest, 23.75 ft, Sep 2, 2021 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Millstone River at Weston 1930s: 1 1940s: 0 1950s: 0 1960s: 0 1970s: 1 1980s: 0 1990s: 2 2000s: 2 2010s: 4 2020s: 6 6 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, Millstone River at Weston
1Sep 2, 202123.75+12.25Major—
2Sep 17, 199923.21+11.71Major—
3Aug 28, 201122.90+11.40Major—
4Apr 16, 200720.20+8.70Major—
5Aug 28, 197119.60+8.10Major—
6Oct 20, 199617.94+6.44Major—
7Mar 14, 201017.85+6.35Major—
8May 1, 201416.72+5.22Moderate—
9Sep 22, 193816.30+4.80Moderate—
10Dec 19, 202315.98+4.48Moderate—
11Jan 10, 202415.80+4.30Moderate—
12Aug 24, 202114.09+2.59Moderate—
13Apr 3, 200513.60+2.10Moderate—
14Nov 25, 201812.83+1.33Minor—
15Apr 8, 202212.76+1.26Minor—
16Dec 28, 202312.38+0.88Minor—
17Jun 5, 200310.93−0.57Action—

The worst floods along the Millstone River

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

September 2, 2021: 23.75 ft here, major flooding

September 17, 1999: 23.21 ft here, major flooding

August 28, 2011: 22.90 ft here, major flooding

  • GriggstownNJ · Aug 28, 2011 · 24.21 ft · Major · its highest
  • MillstoneNJ · Aug 28, 2011 · 22.30 ft · Major
  • Blackwells MillsNJ · Aug 28, 2011 · 21.24 ft · Major · its highest

Gauges on the Millstone River

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

Flood gauges on the Millstone River
GriggstownNJ10.024.21 ft, Aug 28, 201114
Blackwells MillsNJ9.021.24 ft, Aug 28, 201111
MillstoneNJ10.022.45 ft, Sep 2, 20216
Weston this gaugeNJ11.523.75 ft, Sep 2, 20217

Other gauges in Somerset County

Flood gauges in Somerset County
Seeley Mills5.59.05 ft, Sep 2, 20210
Burnt Mills11.016.79 ft, Sep 2, 20214
Bound Brook11.020.66 ft, Sep 2, 20210
Burnt Mills9.512.76 ft, Sep 2, 20211
Blackwells Mills9.021.24 ft, Aug 28, 201111
Griggstown10.024.21 ft, Aug 28, 201114
Millstone10.022.45 ft, Sep 2, 20216
North Branch Village12.321.53 ft, Sep 16, 19990
South Branch8.020.26 ft, Sep 2, 202114
Far Hills6.07.60 ft, Jul 23, 19190
Raritan10.019.52 ft, Sep 2, 20216
Millington8.010.26 ft, Aug 29, 20112
Bound Brook28.042.13 ft, Sep 17, 199913
Manville14.027.66 ft, Sep 2, 202110
North Plainfield7.010.65 ft, Aug 2, 19730
Watchung14.024.50 ft, Aug 2, 19730
Martinsville6.011.47 ft, Sep 2, 20210

Somerset County: every hazard · River floods across the country · New Jersey

NOAA National Water Prediction Service, gauge WETN4, 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.