Minor Flood
12 ft
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Action Stage
11.5 ft
What Floods at Each Level
16 ft
Residences threatened along Woodbine Lane in Marengo.
14 ft
Marengo Water Treatment Facility property threatened. Deerpass Road threatened north of Marengo.
13.5 ft
IL-23 (State Street) threatened in Marengo.
12 ft
Boone-McHenry County Line Road is threatened.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
7.0
Approximate stage of the 1-in-10 annual chance flow (7-day average).
6.0
River nears zero flow.
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Sep 17, 1972 | 13.31 ft | 7,350 cfs |
| Sep 3, 2018 | 13.06 ft | 3,330 cfs |
| Jul 2, 1978 | 12.83 ft | 2,360 cfs |
About This Gauge
USGS Site
NWS LID
MRGI2
River
Kishwaukee River
County
McHenry, IL
Coordinates
42.2653°N, 88.6085°W
Get Flood Alerts for Kishwaukee River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Kishwaukee River at Marengo?
The Kishwaukee River at Marengo gauge is maintained by USGS (site 05438170) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Kishwaukee River at Marengo?
The NWS-defined flood stage for Kishwaukee River at Marengo is 12 feet. Action stage begins at 11.5 feet. Moderate flooding starts at N/A feet, and major flooding at N/A feet.
How do I get alerts when Kishwaukee River rises?
Download StormCast free on Google Play, go to River Gauges, and add Kishwaukee River at Marengo to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Kishwaukee River at Marengo gauge located?
The gauge is located in McHenry County, Illinois at coordinates 42.2653°N, 88.6085°W. USGS site number: 05438170. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Kishwaukee River
On This River
Downstream: Kishwaukee River at Belvidere
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey