Fox River at McHenry (Stratton Lock and Dam) tailwater
Critical Stages
3' - Action
4' - Flood
6' - Moderate
7' - Major
Latest Observation
Updated: 10:15 AM CST 12/6/25
Status: No Flooding
Stage: 0.86 ft
Flow: 0.335 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10:15 AM 12/6 | 0.86 | 0.335 |
| 10:00 AM 12/6 | 0.86 | 0.335 |
| 9:45 AM 12/6 | 0.86 | 0.335 |
| 9:30 AM 12/6 | 0.86 | 0.335 |
| 9:15 AM 12/6 | 0.86 | 0.335 |
| 9:00 AM 12/6 | 0.86 | 0.335 |
| 8:45 AM 12/6 | 0.86 | 0.335 |
| 8:30 AM 12/6 | 0.87 | 0.34 |
| 8:15 AM 12/6 | 0.87 | 0.34 |
| 8:00 AM 12/6 | 0.86 | 0.335 |
| 7:45 AM 12/6 | 0.86 | 0.335 |
| 7:30 AM 12/6 | 0.86 | 0.335 |
| 7:15 AM 12/6 | 0.87 | 0.34 |
| 7:00 AM 12/6 | 0.87 | 0.34 |
| 6:45 AM 12/6 | 0.86 | 0.335 |
| 6:30 AM 12/6 | 0.87 | 0.34 |
| 6:15 AM 12/6 | 0.87 | 0.34 |
| 6:00 AM 12/6 | 0.87 | 0.34 |
| 5:45 AM 12/6 | 0.87 | 0.34 |
| 5:30 AM 12/6 | 0.87 | 0.34 |
| 5:15 AM 12/6 | 0.87 | 0.34 |
| 5:00 AM 12/6 | 0.87 | 0.34 |
| 4:45 AM 12/6 | 0.87 | 0.34 |
| 4:30 AM 12/6 | 0.87 | 0.34 |
| 4:15 AM 12/6 | 0.87 | 0.34 |
| 4:00 AM 12/6 | 0.87 | 0.34 |
| 3:45 AM 12/6 | 0.87 | 0.34 |
| 3:30 AM 12/6 | 0.87 | 0.34 |
| 3:15 AM 12/6 | 0.87 | 0.34 |
| 3:00 AM 12/6 | 0.87 | 0.34 |
12' -
McHenry Waste Water Treatment Plant property is threatened. Miller Road is threatened west of the river in McHenry.
11' -
Multiple structures along the river are threatened in downtown McHenry. River Road is threatened at IL-120 (Elm Street) in McHenry.
10.5' -
IL-176 is threatened near Holiday Hills.
9' -
Country Club Drive, Emerald Drive, and River Road near Chapel Hill Road are threatened in McHenry.
8.5' -
Residences threatened along Country Club Drive and Emerald Drive in McHenry. Roadways threatened at Miller Riverfront Park in McHenry.
8' -
Residences along River Road are threatened near Mary Lane in McHenry. Backwater causes Boone Creek to threaten parking lots in downtown McHenry. Numerous marinas are threatened in McHenry.
7' -
Low-lying sections of Miller Riverfront Park inundated in McHenry.
6' -
Backwater causes Boone Creek to inundate sections of the McHenry river walk.
5.5' -
Water reaches bankfull along Country Club Drive and Emerald Drive in McHenry.
5' -
Roadways and structures may be threatened in Frisch's Riverside subdivision along Lagoon and River Shore Drives.
4.5' -
Roadways and structures may be threatened in the Holiday Hills subdivison along Holiday Drive.
3.5' -
Boathouses threatened along the river downstream of the dam.
3' -
Fox Waterway Agency considers "no wake" order for the Fox River from Algonquin Dam to Stratton Dam.
| Date | Stage (ft) |
|---|---|
| Jul 22, 2017 | 7.65 |
| Apr 23, 2013 | 7.64 |
| Apr 5, 1960 | 7.5 |
| Oct 2, 1986 | 7.2 |
| Apr 2, 1979 | 7.04 |
| Aug 27, 2007 | 6.95 |
| May 6, 1973 | 6.9 |
| Apr 24, 1993 | 6.9 |
| Jun 19, 2008 | 6.85 |
| Sep 17, 2019 | 6.43 |
| Mar 12, 1974 | 6.4 |
| Jun 17, 2000 | 6.22 |
| May 23, 2020 | 6.2 |
| Oct 8, 2019 | 5.93 |
| May 23, 1974 | 5.9 |
| Mar 20, 2019 | 5.63 |
| Oct 12, 2018 | 5.55 |
| Jun 27, 2018 | 5.55 |
| May 4, 2020 | 5.49 |
| Apr 8, 2024 | 5.38 |
Data provided by the National Weather Service.
