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Perkiomen Creek at East Greenville

Highest listed crest 9.66 ftFlood stage 5.0 ft36 crests since 1984

The Perkiomen Creek at East Greenville crested at major flood stage 2 times among the 36 crests the National Weather Service lists from 1984 to 2024. The highest, 9.66 ft on August 4, 2020, was major flooding, 4.66 feet above flood stage. 1 other gauge on the Perkiomen Creek crested above flood stage within a week of it.

The gauge

Highest listed crest
9.66 ft
August 4, 2020; 9,471 cubic feet per second
Flood stage
5.0 ft
Major flooding from 9.0 ft
Crests at major
2
82nd of 170 gauges in Pennsylvania
Most recent flood crest
January 10, 2024
8.18 ft, moderate flooding
Location
Montgomery County
Near Emmaus (9.8 mi), Pottstown (12.0 mi), Allentown (13.9 mi)

Flood stages

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

Flood categories, Perkiomen Creek at East Greenville
Action stage4.05Sep 28, 2018The level at which the NWS or its partners begin to take action
Flood stage (minor)5.019Dec 11, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage7.010Jan 10, 2024Some inundation of structures and roads near the stream
Major flood stage9.02Sep 2, 2021Extensive inundation of structures and roads

Every listed crest

36 crests from 1984 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Perkiomen Creek at East Greenville, 1984 to 2024 46810ft Flood stage 5.0 ftMajor 9.0 ft Jun 25, 1984: 7.26 ft, moderate flooding; 6,740 cubic feet per secondSep 8, 1987: 6.30 ft, minor flooding; 4,810 cubic feet per secondOct 19, 1996: 5.87 ft, minor floodingJan 25, 1997: 4.29 ft, action stage; 2,550 cubic feet per secondJan 18, 1999: 4.52 ft, action stage; 2,070 cubic feet per secondSep 16, 1999: 6.53 ft, minor flooding; 4,800 cubic feet per secondMar 22, 2000: 4.40 ft, action stage; 1,680 cubic feet per secondDec 17, 2000: 5.78 ft, minor flooding; 3,570 cubic feet per secondJul 26, 2001: 5.48 ft, minor flooding; 3,120 cubic feet per secondMay 13, 2002: 6.10 ft, minor flooding; 4,070 cubic feet per secondJun 21, 2003: 6.50 ft, minor flooding; 4,730 cubic feet per secondFeb 6, 2004: 5.64 ft, minor flooding; 2,970 cubic feet per secondSep 18, 2004: 7.07 ft, moderate flooding; 5,720 cubic feet per secondApr 2, 2005: 5.98 ft, minor floodingOct 8, 2005: 7.30 ft, moderate flooding; 6,130 cubic feet per secondAug 28, 2011: 7.75 ft, moderate floodingSep 24, 2011: 6.54 ft, minor floodingApr 30, 2014: 6.02 ft, minor flooding; 3,468 cubic feet per secondFeb 25, 2016: 6.78 ft, minor flooding; 4,580 cubic feet per secondAug 4, 2018: 4.03 ft, action stage; 1,174 cubic feet per secondAug 13, 2018: 7.18 ft, moderate flooding; 5,206 cubic feet per secondSep 28, 2018: 4.89 ft, action stage; 2,016 cubic feet per secondNov 3, 2018: 8.14 ft, moderate flooding; 6,810 cubic feet per secondNov 25, 2018: 5.34 ft, minor flooding; 2,555 cubic feet per secondJul 11, 2019: 7.80 ft, moderate flooding; 6,217 cubic feet per secondAug 4, 2020: 9.66 ft, major flooding; 9,471 cubic feet per secondNov 30, 2020: 6.20 ft, minor flooding; 3,722 cubic feet per secondDec 25, 2020: 5.75 ft, minor flooding; 3,093 cubic feet per secondSep 2, 2021: 9.24 ft, major flooding; 8,846 cubic feet per secondApr 8, 2022: 6.40 ft, minor flooding; 4,012 cubic feet per secondApr 19, 2022: 5.97 ft, minor flooding; 3,398 cubic feet per secondJul 10, 2023: 6.89 ft, minor flooding; 4,756 cubic feet per secondDec 11, 2023: 5.46 ft, minor flooding; 2,708 cubic feet per secondDec 18, 2023: 8.10 ft, moderate flooding; 6,739 cubic feet per secondDec 28, 2023: 8.08 ft, moderate flooding; 6,704 cubic feet per secondJan 10, 2024: 8.18 ft, moderate flooding; 6,881 cubic feet per second Highest, 9.66 ft, Aug 4, 2020 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Perkiomen Creek at East Greenville 1980s: 2 1990s: 2 2000s: 8 2010s: 8 2020s: 11 11 1980s1990s2000s2010s2020s
  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, Perkiomen Creek at East Greenville
1Aug 4, 20209.66+4.66Major9,471
2Sep 2, 20219.24+4.24Major8,846
3Jan 10, 20248.18+3.18Moderate6,881
4Nov 3, 20188.14+3.14Moderate6,810
5Dec 18, 20238.10+3.10Moderate6,739
6Dec 28, 20238.08+3.08Moderate6,704
7Jul 11, 20197.80+2.80Moderate6,217
8Aug 28, 20117.75+2.75Moderate—
9Oct 8, 20057.30+2.30Moderate6,130
10Jun 25, 19847.26+2.26Moderate6,740
11Aug 13, 20187.18+2.18Moderate5,206
12Sep 18, 20047.07+2.07Moderate5,720
13Jul 10, 20236.89+1.89Minor4,756
14Feb 25, 20166.78+1.78Minor4,580
15Sep 24, 20116.54+1.54Minor—
16Sep 16, 19996.53+1.53Minor4,800
17Jun 21, 20036.50+1.50Minor4,730
18Apr 8, 20226.40+1.40Minor4,012
19Sep 8, 19876.30+1.30Minor4,810
20Nov 30, 20206.20+1.20Minor3,722
21May 13, 20026.10+1.10Minor4,070
22Apr 30, 20146.02+1.02Minor3,468
23Apr 2, 20055.98+0.98Minor—
24Apr 19, 20225.97+0.97Minor3,398
25Oct 19, 19965.87+0.87Minor—
26Dec 17, 20005.78+0.78Minor3,570
27Dec 25, 20205.75+0.75Minor3,093
28Feb 6, 20045.64+0.64Minor2,970
29Jul 26, 20015.48+0.48Minor3,120
30Dec 11, 20235.46+0.46Minor2,708
31Nov 25, 20185.34+0.34Minor2,555
32Sep 28, 20184.89−0.11Action2,016
33Jan 18, 19994.52−0.48Action2,070
34Mar 22, 20004.40−0.60Action1,680
35Jan 25, 19974.29−0.71Action2,550
36Aug 4, 20184.03−0.97Action1,174

The worst floods along the Perkiomen Creek

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

August 4, 2020: 9.66 ft here, major flooding

September 2, 2021: 9.24 ft here, major flooding

  • GraterfordPA · Sep 2, 2021 · 24.23 ft · Major · its highest

January 10, 2024: 8.18 ft here, moderate flooding

  • GraterfordPA · Jan 10, 2024 · 13.57 ft · Moderate

Gauges on the Perkiomen Creek

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

Flood gauges on the Perkiomen Creek
East Greenville this gaugePA5.09.66 ft, Aug 4, 20202
GraterfordPA11.024.23 ft, Sep 2, 202111

Other gauges in Montgomery County

Flood gauges in Montgomery County
Schwenksville8.016.89 ft, Sep 2, 20217
Graterford11.024.23 ft, Sep 2, 202111
Norristown13.026.85 ft, Sep 2, 202110
Hillegass5.06.68 ft, Aug 4, 20200

Montgomery County: every hazard · River floods across the country · Pennsylvania

NOAA National Water Prediction Service, gauge EGRP1, 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.