S. Santiam River at Waterloo
Critical Stages
10.2' - Action
12' - Flood
14' - Moderate
16' - Major
Latest Observation
Updated: 6:30 AM PST 12/17/25
Status: No Flooding
Stage: 4.48 ft
Flow: 3.12 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10 AM 12/17 | 4.74 | 3.6 |
| 4 PM 12/17 | 5.31 | 4.76 |
| 10 PM 12/17 | 5.28 | 4.7 |
| 4 AM 12/18 | 5.26 | 4.65 |
| 10 AM 12/18 | 5.69 | 5.61 |
| 4 PM 12/18 | 6.45 | 7.42 |
| 10 PM 12/18 | 7.58 | 10.5 |
| 4 AM 12/19 | 8.5 | 13.3 |
| 10 AM 12/19 | 9.06 | 15.1 |
| 4 PM 12/19 | 8.87 | 14.5 |
| 10 PM 12/19 | 8.65 | 13.8 |
| 4 AM 12/20 | 8.44 | 13.1 |
| 10 AM 12/20 | 8.25 | 12.5 |
| 4 PM 12/20 | 8.11 | 12.1 |
| 10 PM 12/20 | 8.02 | 11.8 |
| 4 AM 12/21 | 7.96 | 11.6 |
| 10 AM 12/21 | 7.59 | 10.5 |
| 4 PM 12/21 | 7.23 | 9.47 |
| 10 PM 12/21 | 7.27 | 9.58 |
| 4 AM 12/22 | 7.31 | 9.7 |
| 10 AM 12/22 | 7.34 | 9.78 |
| 4 PM 12/22 | 7.34 | 9.78 |
| 10 PM 12/22 | 7.33 | 9.76 |
| 4 AM 12/23 | 7.3 | 9.67 |
| 10 AM 12/23 | 7.26 | 9.56 |
| 4 PM 12/23 | 7.23 | 9.47 |
| 10 PM 12/23 | 7.2 | 9.38 |
| 4 AM 12/24 | 7.18 | 9.33 |
| 10 AM 12/24 | 7.15 | 9.24 |
| 4 PM 12/24 | 7.15 | 9.24 |
| 10 PM 12/24 | 7.15 | 9.24 |
| 4 AM 12/25 | 7.15 | 9.24 |
| 10 AM 12/25 | 7.1 | 9.1 |
| 4 PM 12/25 | 6.62 | 7.84 |
| 10 PM 12/25 | 6.01 | 6.36 |
| 4 AM 12/26 | 5.98 | 6.29 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 6:40 AM 12/17 | 4.49 | 3.13 |
| 6:35 AM 12/17 | 4.48 | 3.12 |
| 6:30 AM 12/17 | 4.48 | 3.12 |
| 6:25 AM 12/17 | 4.47 | 3.1 |
| 6:20 AM 12/17 | 4.45 | 3.06 |
| 6:15 AM 12/17 | 4.45 | 3.06 |
| 6:10 AM 12/17 | 4.44 | 3.04 |
| 6:05 AM 12/17 | 4.44 | 3.04 |
| 6:00 AM 12/17 | 4.44 | 3.04 |
| 5:55 AM 12/17 | 4.42 | 3.01 |
| 5:50 AM 12/17 | 4.42 | 3.01 |
| 5:45 AM 12/17 | 4.4 | 2.97 |
| 5:40 AM 12/17 | 4.41 | 2.99 |
| 5:35 AM 12/17 | 4.39 | 2.96 |
| 5:30 AM 12/17 | 4.39 | 2.96 |
| 5:25 AM 12/17 | 4.38 | 2.94 |
| 5:20 AM 12/17 | 4.38 | 2.94 |
| 5:15 AM 12/17 | 4.37 | 2.92 |
| 5:10 AM 12/17 | 4.37 | 2.92 |
| 5:05 AM 12/17 | 4.36 | 2.9 |
| 5:00 AM 12/17 | 4.34 | 2.87 |
| 4:55 AM 12/17 | 4.37 | 2.92 |
| 4:50 AM 12/17 | 4.35 | 2.89 |
| 4:45 AM 12/17 | 4.36 | 2.9 |
| 4:40 AM 12/17 | 4.34 | 2.87 |
| 4:35 AM 12/17 | 4.35 | 2.89 |
| 4:30 AM 12/17 | 4.34 | 2.87 |
| 4:25 AM 12/17 | 4.33 | 2.85 |
| 4:20 AM 12/17 | 4.33 | 2.85 |
| 4:15 AM 12/17 | 4.36 | 2.9 |
16' -
expect widespread flooding of low-lying farmland and property from Sweet Home downstream to Lebanon, with some flooding of secondary roads near the South Santiam.
12' -
expect flooding of low-lying areas along the river.
| Date | Stage (ft) |
|---|---|
| Dec 22, 1964 | 24.5 |
| Dec 28, 1945 | 22.85 |
| Mar 31, 1931 | 22 |
| Dec 11, 1956 | 21.1 |
| Feb 10, 1961 | 21.08 |
| Nov 22, 1953 | 20.2 |
| Jan 1, 1943 | 20.1 |
| Dec 21, 1955 | 19.6 |
| Jan 18, 1954 | 19.4 |
| Feb 21, 1927 | 19.4 |
| Feb 7, 1996 | 13.09 |
| Apr 12, 2019 | 11.96 |
| Nov 19, 1996 | 11.31 |
| Jan 15, 1974 | 10.58 |
| Nov 26, 1999 | 10.08 |
Data provided by the National Weather Service.
