Major Flood
578.22 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: AGCM4). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Minor Flood
578.02 ft
Action Stage
577.33 ft
7-Day Water Level Chart
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About This Gauge
NWS LID
AGCM4
River
St Clair River
County
St. Clair, MI
Coordinates
42.6158°N, 82.5436°W
Get Flood Alerts for St Clair 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 St Clair River at Algonac?
The St Clair River at Algonac gauge is maintained by USGS 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 St Clair River at Algonac?
The NWS-defined flood stage for St Clair River at Algonac is 578.02 feet. Action stage begins at 577.33 feet. Moderate flooding starts at N/A feet, and major flooding at 578.22 feet.
How do I get alerts when St Clair River rises?
Download StormCast free on Google Play, go to River Gauges, and add St Clair River at Algonac 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 St Clair River at Algonac gauge located?
The gauge is located in St. Clair County, Michigan at coordinates 42.6158°N, 82.5436°W. Data is provided by the U.S. Geological Survey and the National Weather Service.