Silver Creek near Mascoutah, IL
River level and flood forecast · St. Clair County
Normal8.0 ftas of Mon 2:45 PM
Flow: 10 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.
What floods at each level
From the National Weather Service, highest first.
- 25.4 ftSilver Creek backwater will begin flooding East Drive near Cardinal Creek near this elevation, based on HEC-RAS modeling. THIS HAS NOT BEEN VERIFIED. WSE = 429.8 ft.
- 22.9 ftHighway 161 begins flooding 0.5 miles east of the gage across from Mascoutah Lake. This is based off HEC-RAS modeling and HAS NOT BEEN VERIFIED. WSE = 422.9-423.0 ft.
- 19.4 ftScott Lake Road floods at Cardinal Creek bridge due to backwater from Silver Creek. This was verified during the 6-7 April 2025 flood with a crest of 20.3 feet. WSE = 425.4 ft.
Highest crests on record
- 20.38 ft — April 7, 2025
- 18.57 ft — April 23, 2025
Recent crests: 18.57 ft (April 23, 2025) · 20.38 ft (April 7, 2025)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MTHI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.