Mississippi River below Lock and Dam 4 - Alma
Critical Stages
10' - Action
16' - Flood
17' - Moderate
18' - Major
Latest Observation
Updated: 3:15 PM CST 12/8/25
Status: No Flooding
Stage: 4.31 ft
Flow: 13 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 3:15 PM 12/8 | 4.31 | 13 |
| 3:00 PM 12/8 | 4.3 | 12.7 |
| 2:45 PM 12/8 | 4.3 | 12.7 |
| 2:30 PM 12/8 | 4.3 | 12.7 |
| 2:15 PM 12/8 | 4.3 | 12.7 |
| 2:00 PM 12/8 | 4.3 | 12.7 |
| 1:45 PM 12/8 | 4.3 | 12.7 |
| 1:30 PM 12/8 | 4.31 | 13 |
| 1:15 PM 12/8 | 4.31 | 13 |
| 1:00 PM 12/8 | 4.3 | 12.7 |
| 12:45 PM 12/8 | 4.3 | 12.7 |
| 12:30 PM 12/8 | 4.3 | 12.7 |
| 12:15 PM 12/8 | 4.31 | 13 |
| 12:00 PM 12/8 | 4.31 | 13 |
| 11:45 AM 12/8 | 4.31 | 13 |
| 11:30 AM 12/8 | 4.32 | 13.3 |
| 11:15 AM 12/8 | 4.32 | 13.3 |
| 11:00 AM 12/8 | 4.32 | 13.3 |
| 10:45 AM 12/8 | 4.32 | 13.3 |
| 10:30 AM 12/8 | 4.32 | 13.3 |
| 10:15 AM 12/8 | 4.34 | 13.9 |
| 10:00 AM 12/8 | 4.33 | 13.6 |
| 9:45 AM 12/8 | 4.33 | 13.6 |
| 9:30 AM 12/8 | 4.33 | 13.6 |
| 9:15 AM 12/8 | 4.33 | 13.6 |
| 9:00 AM 12/8 | 4.34 | 13.9 |
| 8:45 AM 12/8 | 4.34 | 13.9 |
| 8:30 AM 12/8 | 4.33 | 13.6 |
| 8:15 AM 12/8 | 4.34 | 13.9 |
| 8:00 AM 12/8 | 4.34 | 13.9 |
20' -
Water reaches the top of the protective earthen dike.
19.8' -
The water reaches the flood of record set in 1965.
16.5' -
Agriculture and recreational land is flooded.
16' -
Lock gates and walls at Dam 4 go underwater.
15.5' -
Lock and Dam 4 is closed to navigation.
| Date | Stage (ft) |
|---|---|
| Apr 19, 1965 | 19.78 |
| Apr 16, 2001 | 18.15 |
| Apr 18, 1969 | 17.53 |
| Apr 25, 2023 | 17.05 |
| Apr 18, 1952 | 16.3 |
| Apr 16, 1951 | 16.2 |
| Apr 11, 1997 | 15.6 |
| Apr 5, 1967 | 15.35 |
| Jun 25, 1993 | 14.93 |
| Apr 14, 2011 | 14.75 |
| Sep 29, 2010 | 12.34 |
Data provided by the National Weather Service.
