Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Flat Brook above Flatbrookville

Highest listed crest 12.90 ftFlood stage 6.0 ft18 crests since 1955

The Flat Brook above Flatbrookville crested at major flood stage 4 times among the 18 crests the National Weather Service lists from 1955 to 2023. The highest, 12.90 ft on August 28, 2011, was major flooding, 6.90 feet above flood stage.

The gauge

Highest listed crest
12.90 ft
August 28, 2011
Flood stage
6.0 ft
Major flooding from 9.0 ft
Crests at major
4
32nd of 125 gauges in New Jersey
Most recent flood crest
December 19, 2023
6.77 ft, minor flooding
Location
Sussex County
New Jersey

Flood stages

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

Flood categories, Flat Brook above Flatbrookville
Action stage5.02Oct 20, 1996The level at which the NWS or its partners begin to take action
Flood stage (minor)6.04Dec 19, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage7.08Apr 8, 2022Some inundation of structures and roads near the stream
Major flood stage9.04Aug 28, 2011Extensive inundation of structures and roads

Every listed crest

18 crests from 1955 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Flat Brook above Flatbrookville, 1955 to 2023 468101214ft Flood stage 6.0 ftMajor 9.0 ft Aug 19, 1955: 12.58 ft, major flooding; 9,560 cubic feet per secondDec 21, 1973: 8.56 ft, moderate flooding; 4,060 cubic feet per secondApr 16, 1983: 9.52 ft, major flooding; 5,110 cubic feet per secondApr 5, 1984: 6.60 ft, minor flooding; 2,390 cubic feet per secondJan 20, 1996: 6.58 ft, minor flooding; 2,370 cubic feet per secondJan 28, 1996: 7.04 ft, moderate flooding; 2,710 cubic feet per secondApr 16, 1996: 5.15 ft, action stage; 1,440 cubic feet per secondOct 20, 1996: 5.76 ft, action stage; 1,170 cubic feet per secondSep 17, 1999: 8.26 ft, moderate flooding; 3,760 cubic feet per secondSep 18, 2004: 8.17 ft, moderate flooding; 3,670 cubic feet per secondApr 3, 2005: 7.27 ft, moderate flooding; 2,890 cubic feet per secondOct 8, 2005: 7.35 ft, moderate flooding; 2,960 cubic feet per secondApr 16, 2007: 9.27 ft, major floodingAug 28, 2011: 12.90 ft, major floodingDec 25, 2020: 6.90 ft, minor flooding; 2,608 cubic feet per secondSep 2, 2021: 7.75 ft, moderate flooding; 3,292 cubic feet per secondApr 8, 2022: 7.68 ft, moderate flooding; 3,230 cubic feet per secondDec 19, 2023: 6.77 ft, minor flooding; 2,515 cubic feet per second Highest, 12.90 ft, Aug 28, 2011 1960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Flat Brook above Flatbrookville 1950s: 1 1960s: 0 1970s: 1 1980s: 2 1990s: 3 2000s: 4 4 2010s: 1 2020s: 4 1950s1960s1970s1980s1990s2000s2010s2020s
  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, Flat Brook above Flatbrookville
1Aug 28, 201112.90+6.90Major—
2Aug 19, 195512.58+6.58Major9,560
3Apr 16, 19839.52+3.52Major5,110
4Apr 16, 20079.27+3.27Major—
5Dec 21, 19738.56+2.56Moderate4,060
6Sep 17, 19998.26+2.26Moderate3,760
7Sep 18, 20048.17+2.17Moderate3,670
8Sep 2, 20217.75+1.75Moderate3,292
9Apr 8, 20227.68+1.68Moderate3,230
10Oct 8, 20057.35+1.35Moderate2,960
11Apr 3, 20057.27+1.27Moderate2,890
12Jan 28, 19967.04+1.04Moderate2,710
13Dec 25, 20206.90+0.90Minor2,608
14Dec 19, 20236.77+0.77Minor2,515
15Apr 5, 19846.60+0.60Minor2,390
16Jan 20, 19966.58+0.58Minor2,370
17Oct 20, 19965.76−0.24Action1,170
18Apr 16, 19965.15−0.85Action1,440

Other gauges in Sussex County

Flood gauges in Sussex County
Huntsville4.06.30 ft, Sep 9, 20110

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

NOAA National Water Prediction Service, gauge FLAN4, 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.