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West Branch Herring Run at Idlewylde

Highest listed crest 10.87 ftFlood stage 9.0 ft26 crests since 1967

The West Branch Herring Run at Idlewylde crested above flood stage 2 times among the 26 crests the National Weather Service lists from 1967 to 2021. The highest, 10.87 ft on August 14, 2012, was minor flooding, 1.87 feet above flood stage.

The gauge

Highest listed crest
10.87 ft
August 14, 2012; 2,340 cubic feet per second
Flood stage
9.0 ft
Major flooding from 14.0 ft
Crests at major
0
2 above flood stage
Most recent flood crest
August 13, 2018
9.41 ft, minor flooding
Location
Baltimore County
Near Baltimore (5.3 mi)

Flood stages

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

Flood categories, West Branch Herring Run at Idlewylde
Action stage6.024Jun 10, 2021The level at which the NWS or its partners begin to take action
Flood stage (minor)9.02Aug 13, 2018Minimal or no property damage, but possibly some public threat
Moderate flood stage12.50—Some inundation of structures and roads near the stream
Major flood stage14.00—Extensive inundation of structures and roads

Every listed crest

26 crests from 1967 to 2021. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the West Branch Herring Run at Idlewylde, 1967 to 2021 68101214ft Flood stage 9.0 ftMajor 14.0 ft Aug 27, 1967: 6.46 ft, action stage; 1,540 cubic feet per secondSep 10, 1968: 6.37 ft, action stage; 1,480 cubic feet per secondAug 1, 1971: 6.51 ft, action stage; 1,570 cubic feet per secondSep 11, 1971: 6.80 ft, action stage; 1,740 cubic feet per secondJun 29, 1972: 6.50 ft, action stage; 1,560 cubic feet per secondSep 6, 1979: 6.68 ft, action stage; 1,660 cubic feet per secondAug 3, 1984: 6.22 ft, action stage; 1,390 cubic feet per secondJun 13, 1998: 6.45 ft, action stage; 1,520 cubic feet per secondAug 26, 1999: 6.23 ft, action stage; 1,390 cubic feet per secondSep 9, 1999: 6.67 ft, action stage; 1,660 cubic feet per secondJul 7, 2004: 7.05 ft, action stage; 1,910 cubic feet per secondJul 27, 2004: 6.51 ft, action stage; 1,560 cubic feet per secondJun 25, 2006: 7.10 ft, action stage; 1,630 cubic feet per secondJul 23, 2008: 6.06 ft, action stage; 1,300 cubic feet per secondAug 14, 2011: 6.52 ft, action stage; 1,640 cubic feet per secondSep 7, 2011: 7.03 ft, action stage; 1,610 cubic feet per secondJun 1, 2012: 7.39 ft, action stage; 2,120 cubic feet per secondJun 10, 2012: 6.20 ft, action stage; 1,480 cubic feet per secondJun 29, 2012: 6.47 ft, action stage; 1,610 cubic feet per secondAug 14, 2012: 10.87 ft, minor flooding; 2,340 cubic feet per secondJun 10, 2013: 6.65 ft, action stage; 1,520 cubic feet per secondFeb 24, 2016: 7.70 ft, action stage; 1,770 cubic feet per secondJun 27, 2016: 8.99 ft, action stage; 2,030 cubic feet per secondAug 13, 2018: 9.41 ft, minor flooding; 2,110 cubic feet per secondJul 11, 2019: 7.47 ft, action stage; 1,720 cubic feet per secondJun 10, 2021: 7.28 ft, action stage; 1,670 cubic feet per second Highest, 10.87 ft, Aug 14, 2012 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, West Branch Herring Run at Idlewylde 1960s: 0 1970s: 0 1980s: 0 1990s: 0 2000s: 0 2010s: 2 2 2020s: 0 1960s1970s1980s1990s2000s2010s2020s
  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, West Branch Herring Run at Idlewylde
1Aug 14, 201210.87+1.87Minor2,340
2Aug 13, 20189.41+0.41Minor2,110
3Jun 27, 20168.99−0.01Action2,030
4Feb 24, 20167.70−1.30Action1,770
5Jul 11, 20197.47−1.53Action1,720
6Jun 1, 20127.39−1.61Action2,120
7Jun 10, 20217.28−1.72Action1,670
8Jun 25, 20067.10−1.90Action1,630
9Jul 7, 20047.05−1.95Action1,910
10Sep 7, 20117.03−1.97Action1,610
11Sep 11, 19716.80−2.20Action1,740
12Sep 6, 19796.68−2.32Action1,660
13Sep 9, 19996.67−2.33Action1,660
14Jun 10, 20136.65−2.35Action1,520
15Aug 14, 20116.52−2.48Action1,640
16Aug 1, 19716.51−2.49Action1,570
17Jul 27, 20046.51−2.49Action1,560
18Jun 29, 19726.50−2.50Action1,560
19Jun 29, 20126.47−2.53Action1,610
20Aug 27, 19676.46−2.54Action1,540
21Jun 13, 19986.45−2.55Action1,520
22Sep 10, 19686.37−2.63Action1,480
23Aug 26, 19996.23−2.77Action1,390
24Aug 3, 19846.22−2.78Action1,390
25Jun 10, 20126.20−2.80Action1,480
26Jul 23, 20086.06−2.94Action1,300

Other gauges in Baltimore County

Flood gauges in Baltimore County
Broadmoor4.06.08 ft, Jun 22, 19720
Cockeysville9.012.10 ft, Jul 1, 19847
Bentley Springs5.57.30 ft, Jul 25, 20180
Woodlawn10.012.24 ft, Jul 30, 20160
Franklintown10.012.50 ft, Jun 22, 19720
Woodlawn9.012.16 ft, Jul 30, 20160
Catonsville9.011.29 ft, Jul 30, 20160
Arbutus7.013.25 ft, Aug 26, 19991
Beckleysville7.07.27 ft, Jul 24, 20180
Beckleysville6.07.85 ft, Jul 23, 20180
Glencoe7.016.50 ft, Sep 8, 20119
Hoffmanville6.010.02 ft, Aug 28, 20091
Parkton10.011.62 ft, Sep 8, 20110
Villa Nova11.021.50 ft, Jun 22, 19721
White Marsh6.013.51 ft, Oct 19, 20240
Sorrento17.018.11 ft, Jun 22, 19720
Blue Mount8.518.54 ft, Jun 22, 19724
Laurel Brook7.511.40 ft, Jul 1, 19840
Glen Arm10.011.15 ft, Jul 14, 20150
Ellicott City122.5124.78 ft, May 27, 20180
Hollofield11.031.30 ft, Jun 22, 19721
Catonsville20.027.15 ft, May 27, 20180
Dover8.510.86 ft, Jul 24, 20180
Rockdale7.07.83 ft, Jul 31, 20160
Woodlawn7.08.15 ft, Jul 30, 20160
Middle River10.813.06 ft, Aug 7, 20180
Western Run8.026.00 ft, Jun 22, 19723
White Marsh11.018.49 ft, Aug 1, 19711

Baltimore County: every hazard · River floods across the country · Maryland

NOAA National Water Prediction Service, gauge IDLM2, 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.