Nippersink Creek at Wonder Lake, IL
River level and flood forecast · McHenry County
Normal4.8 ftas of Mon 2:45 PM
The river is 4.2 ft below flood stage (9 ft).
Flow: 46 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 | 13 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 9 ft |
| Action stage | 8.5 ft |
| Record crest (June 11, 1967) | 14.3 ft |
What floods at each level
From the National Weather Service, highest first.
- 16 ftWonder Lake Road threatened along Wonder Lake.
- 15 ftNumerous sections of West Lake Shore Drive, East Lake Shore Drive, and nearby side streets threatened in Wonder Lake. Greenwood Road threatened near the creek in Greenwood.
- 14 ftWater may near the top of Wonder Lake Dam. Numerous residences threatened along Wonder Lake.
- 13.5 ftA few residences threatened along West Lake Shore Drive near Sunset Drive and near Nundra Drive in Wonder Lake. A few residences threatened along East Lake Shore Drive near Deep Spring Road in Wonder Lake. Thompson Road threatened near the creek in Wonder Lake.
- 13 ftA few residences threatened along West Lake Shore Drive and Westwood Drive in Wonder Lake. West Lake Shore Drive threatened near Sunset Drive and Nundra Drive in Wonder Lake. East Lake Shore Drive threatened near Nantucket Drive in Wonder Lake.
- 12.5 ftEast Lakeshore Drive threatened near Lakeview Drive in Wonder Lake.
- 11 ftA few low-lying residences threatened along East Lake Shore Drive near Nantucket Drive in Wonder Lake.
- 9 ftWater overtops low-lying banks along Wonder Lake. Low-lying portions of Jacobson Park threatened in Wonder Lake.
Highest crests on record
- 14.3 ft — June 11, 1967
- 11.63 ft — June 13, 1999
- 11.16 ft — September 13, 2019
- 10.89 ft — June 13, 2000
- 9.92 ft — April 18, 2013
Recent crests: 8.12 ft (June 23, 2024) · 8.43 ft (April 3, 2024) · 8.67 ft (August 30, 2020) · 9.48 ft (May 17, 2020) · 11.16 ft (September 13, 2019)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (WNNI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.