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Boone Creek near Mchenry

Highest listed crest 7.48 ftFlood stage 7.0 ft8 crests since 1970

The Boone Creek near Mchenry crested above flood stage 1 time among the 8 crests the National Weather Service lists from 1970 to 2020. The highest, 7.48 ft on June 26, 2013, was minor flooding, 0.48 feet above flood stage.

The gauge

Highest listed crest
7.48 ft
June 26, 2013; 773 cubic feet per second
Flood stage
7.0 ft
Major flooding from 11.0 ft
Crests at major
0
1 above flood stage
Most recent flood crest
June 26, 2013
7.48 ft, minor flooding
Location
McHenry County
Near McHenry (1.5 mi), Crystal Lake (6.1 mi), Woodstock (6.3 mi)

Flood stages

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

Flood categories, Boone Creek near Mchenry
Action stage6.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)7.01Jun 26, 2013Minimal or no property damage, but possibly some public threat
Moderate flood stage9.00—Some inundation of structures and roads near the stream
Major flood stage11.00—Extensive inundation of structures and roads

Every listed crest

8 crests from 1970 to 2020. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Boone Creek near Mchenry, 1970 to 2020 4681012ft Flood stage 7.0 ftMajor 11.0 ft Jun 2, 1970: 4.87 ft, below flood stage; 276 cubic feet per secondSep 27, 1986: 5.37 ft, below flood stage; 345 cubic feet per secondJun 26, 2013: 7.48 ft, minor flooding; 773 cubic feet per secondJul 17, 2015: 4.43 ft, below flood stage; 217 cubic feet per secondJul 22, 2017: 4.81 ft, below flood stage; 263 cubic feet per secondJun 27, 2018: 4.46 ft, below flood stage; 230 cubic feet per secondSep 12, 2019: 5.68 ft, below flood stage; 412 cubic feet per secondMay 17, 2020: 5.36 ft, below flood stage Highest, 7.48 ft, Jun 26, 2013 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Boone Creek near Mchenry 1970s: 0 1980s: 0 1990s: 0 2000s: 0 2010s: 1 1 2020s: 0 1970s1980s1990s2000s2010s2020s
  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, Boone Creek near Mchenry
1Jun 26, 20137.48+0.48Minor773
2Sep 12, 20195.68−1.32Below flood stage412
3Sep 27, 19865.37−1.63Below flood stage345
4May 17, 20205.36−1.64Below flood stage—
5Jun 2, 19704.87−2.13Below flood stage276
6Jul 22, 20174.81−2.19Below flood stage263
7Jun 27, 20184.46−2.54Below flood stage230
8Jul 17, 20154.43−2.57Below flood stage217

Other gauges in McHenry County

Flood gauges in McHenry County
Algonquin3.04.50 ft, Apr 1, 191612
Algonquin tailwater9.514.00 ft, Jul 5, 19386
McHenry (Stratton Lock and Dam) tailwater4.09.00 ft, Jul 5, 19386
Johnsburg6.58.90 ft, Jul 4, 19382
Marengo12.013.06 ft, Sep 4, 20180
Wonder Lake9.014.30 ft, Jun 11, 19671
Spring Grove11.014.26 ft, Sep 26, 19860

McHenry County: every hazard · River floods across the country · Illinois

NOAA National Water Prediction Service, gauge MBNI2, 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.