Sacramento-San Joaquin Delta at Mallard Island
Critical Stages
Action
Flood
Moderate
Major
Latest Observation
Updated: 5:45 AM PST 12/18/25
Status: Not Defined
Stage: 3.54 ft
Flow: 6.56 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 12 PM 12/18 | 6.2 | 9.2 |
| 9 PM 12/18 | 1.1 | 4.12 |
| 3 AM 12/19 | 4.7 | 7.71 |
| 7 AM 12/19 | 3.6 | 6.62 |
| 1 PM 12/19 | 6.4 | 9.41 |
| 10 PM 12/19 | 1.1 | 4.12 |
| 4 AM 12/20 | 4.8 | 7.81 |
| 7 AM 12/20 | 3.7 | 6.71 |
| 1 PM 12/20 | 6.5 | 9.51 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 6:15 AM 12/18 | 3.43 | 6.45 |
| 6:00 AM 12/18 | 3.47 | 6.49 |
| 5:45 AM 12/18 | 3.54 | 6.56 |
| 5:30 AM 12/18 | 3.62 | 6.64 |
| 5:15 AM 12/18 | 3.73 | 6.74 |
| 5:00 AM 12/18 | 3.85 | 6.86 |
| 4:45 AM 12/18 | 3.98 | 6.98 |
| 4:30 AM 12/18 | 4.1 | 7.1 |
| 4:15 AM 12/18 | 4.22 | 7.23 |
| 4:00 AM 12/18 | 4.32 | 7.33 |
| 3:45 AM 12/18 | 4.41 | 7.42 |
| 3:30 AM 12/18 | 4.47 | 7.48 |
| 3:15 AM 12/18 | 4.52 | 7.53 |
| 3:00 AM 12/18 | 4.56 | 7.57 |
| 2:45 AM 12/18 | 4.58 | 7.59 |
| 2:30 AM 12/18 | 4.58 | 7.59 |
| 2:15 AM 12/18 | 4.58 | 7.59 |
| 2:00 AM 12/18 | 4.55 | 7.56 |
| 1:45 AM 12/18 | 4.52 | 7.53 |
| 1:30 AM 12/18 | 4.47 | 7.48 |
| 1:15 AM 12/18 | 4.41 | 7.42 |
| 1:00 AM 12/18 | 4.34 | 7.35 |
| 12:45 AM 12/18 | 4.25 | 7.26 |
| 12:30 AM 12/18 | 4.16 | 7.17 |
| 12:15 AM 12/18 | 4.06 | 7.06 |
| 12:00 AM 12/18 | 3.92 | 6.92 |
| 11:45 PM 12/17 | 3.77 | 6.78 |
| 11:30 PM 12/17 | 3.59 | 6.61 |
| 11:15 PM 12/17 | 3.38 | 6.4 |
| 11:00 PM 12/17 | 3.13 | 6.14 |
No flood impact data available for this location.
Historical crest information is not available.
Data provided by the National Weather Service.
