Boone Creek near Mchenry, IL
River level and flood forecast · McHenry County
Normal1.0 ftas of Mon 3:45 PM
The river is 6.0 ft below flood stage (7 ft).
Flow: 12 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 11 ft |
| Moderate flood stage | 9 ft |
| Flood stage | 7 ft |
| Action stage | 6 ft |
| Record crest (June 26, 2013) | 7.48 ft |
What floods at each level
From the National Weather Service, highest first.
- 15 ftResidences may be threatened near the creek and Oakwood Drive in McHenry. Union Pacific Northwest railroad tracks may be threatened in McHenry.
- 13 ftIL-120 (Elm Street) may be threatened in McHenry. Oakwood Court and Meadow Lane may be threatened in McHenry.
- 12 ftOakwood Drive may be threatened in McHenry.
- 10 ftCommercial structures may be threatened off IL-120 (Elm Street) in McHenry. Numerous residences may be threatened near the creek along Millstream Drive, Grand Avenue, and Clearbrook Drive in McHenry. Bull Valley Road is threatened southwest of McHenry.
- 8 ftDartmoor Drive is threatened in McHenry.
- 7 ftTrails are threatened at Whispering Oaks Park in McHenry.
- 6 ftWater overtops banks near Whispering Oaks Park in McHenry.
- 4 ftWater overtops low-lying banks near the gauge southwest of McHenry.
Highest crests on record
- 7.48 ft — June 26, 2013
- 5.68 ft — September 12, 2019
- 5.37 ft — September 27, 1986
- 5.36 ft — May 17, 2020
- 4.87 ft — June 2, 1970
Recent crests: 5.36 ft (May 17, 2020) · 5.68 ft (September 12, 2019) · 4.46 ft (June 27, 2018) · 4.81 ft (July 22, 2017) · 4.43 ft (July 17, 2015)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MBNI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.