S. Santiam River at Waterloo
Critical Stages
10.2' - Action
12' - Flood
14' - Moderate
16' - Major
Latest Observation
Updated: 11:30 PM PST 12/15/25
Status: No Flooding
Stage: 3.96 ft
Flow: 2.23 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 4 AM 12/16 | 4.22 | 2.66 |
| 10 AM 12/16 | 4.21 | 2.64 |
| 4 PM 12/16 | 4.2 | 2.63 |
| 10 PM 12/16 | 4.23 | 2.68 |
| 4 AM 12/17 | 4.38 | 2.94 |
| 10 AM 12/17 | 4.52 | 3.19 |
| 4 PM 12/17 | 4.58 | 3.3 |
| 10 PM 12/17 | 4.58 | 3.3 |
| 4 AM 12/18 | 4.55 | 3.24 |
| 10 AM 12/18 | 4.61 | 3.35 |
| 4 PM 12/18 | 4.86 | 3.83 |
| 10 PM 12/18 | 5.76 | 5.77 |
| 4 AM 12/19 | 6.38 | 7.25 |
| 10 AM 12/19 | 6.33 | 7.13 |
| 4 PM 12/19 | 7.68 | 10.8 |
| 10 PM 12/19 | 9.18 | 15.5 |
| 4 AM 12/20 | 8.44 | 13.1 |
| 10 AM 12/20 | 7.49 | 10.2 |
| 4 PM 12/20 | 6.72 | 8.09 |
| 10 PM 12/20 | 6.3 | 7.06 |
| 4 AM 12/21 | 6.21 | 6.84 |
| 10 AM 12/21 | 6.14 | 6.67 |
| 4 PM 12/21 | 6.09 | 6.55 |
| 10 PM 12/21 | 6.09 | 6.55 |
| 4 AM 12/22 | 6.09 | 6.55 |
| 10 AM 12/22 | 6.11 | 6.6 |
| 4 PM 12/22 | 6.13 | 6.64 |
| 10 PM 12/22 | 6.15 | 6.69 |
| 4 AM 12/23 | 6.14 | 6.67 |
| 10 AM 12/23 | 6.12 | 6.62 |
| 4 PM 12/23 | 6.09 | 6.55 |
| 10 PM 12/23 | 6.07 | 6.5 |
| 4 AM 12/24 | 6.05 | 6.45 |
| 10 AM 12/24 | 6.02 | 6.38 |
| 4 PM 12/24 | 5.99 | 6.31 |
| 10 PM 12/24 | 5.98 | 6.29 |
| 4 AM 12/25 | 5.98 | 6.29 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 11:30 PM 12/15 | 3.96 | 2.23 |
| 11:15 PM 12/15 | 3.97 | 2.25 |
| 11:10 PM 12/15 | 3.98 | 2.26 |
| 11:05 PM 12/15 | 3.97 | 2.25 |
| 11:00 PM 12/15 | 3.96 | 2.23 |
| 10:55 PM 12/15 | 3.97 | 2.25 |
| 10:50 PM 12/15 | 3.96 | 2.23 |
| 10:45 PM 12/15 | 3.95 | 2.22 |
| 10:40 PM 12/15 | 3.96 | 2.23 |
| 10:35 PM 12/15 | 3.96 | 2.23 |
| 10:30 PM 12/15 | 3.95 | 2.22 |
| 10:25 PM 12/15 | 3.97 | 2.25 |
| 10:20 PM 12/15 | 3.96 | 2.23 |
| 10:15 PM 12/15 | 3.96 | 2.23 |
| 10:10 PM 12/15 | 3.97 | 2.25 |
| 10:05 PM 12/15 | 3.96 | 2.23 |
| 10:00 PM 12/15 | 3.96 | 2.23 |
| 9:55 PM 12/15 | 3.97 | 2.25 |
| 9:50 PM 12/15 | 3.95 | 2.22 |
| 9:45 PM 12/15 | 3.95 | 2.22 |
| 9:40 PM 12/15 | 3.97 | 2.25 |
| 9:35 PM 12/15 | 3.97 | 2.25 |
| 9:30 PM 12/15 | 3.96 | 2.23 |
| 9:25 PM 12/15 | 3.95 | 2.22 |
| 9:20 PM 12/15 | 3.96 | 2.23 |
| 9:15 PM 12/15 | 3.96 | 2.23 |
| 9:10 PM 12/15 | 3.96 | 2.23 |
| 9:05 PM 12/15 | 3.95 | 2.22 |
| 9:00 PM 12/15 | 3.96 | 2.23 |
| 8:55 PM 12/15 | 3.95 | 2.22 |
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 |
| Feb 21, 1927 | 19.4 |
| Jan 18, 1954 | 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.
