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Local Info
Critical Stages
19' - Action21' - Flood29' - Moderate Flood34' - Major Flood
Mississippi River - Gauge ALNI2
Alton, IL
Lat: 38.87N, Lon: 90.18W
 
Latest Observation
 Updated: 7:30 AM CDT 10/8/25
Stage:3.13 ft
Flow:61.7 kcfs*
* Thousand cubic feet per second
Forecast
hydrograph
Flood Impacts
Historical Crests

Data provided by NOAA Advanced Hydrologic Prediction Service

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