S. Santiam River at Waterloo
Critical Stages
10.2' - Action
12' - Flood
14' - Moderate
16' - Major
Latest Observation
Updated: 8:15 PM PST 12/17/25
Status: No Flooding
Stage: 5.03 ft
Flow: 4.17 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10 PM 12/17 | 5.24 | 4.61 |
| 4 AM 12/18 | 5.09 | 4.29 |
| 10 AM 12/18 | 5.37 | 4.89 |
| 4 PM 12/18 | 5.74 | 5.73 |
| 10 PM 12/18 | 6.58 | 7.74 |
| 4 AM 12/19 | 8 | 11.8 |
| 10 AM 12/19 | 8.93 | 14.7 |
| 4 PM 12/19 | 8.76 | 14.2 |
| 10 PM 12/19 | 8.55 | 13.5 |
| 4 AM 12/20 | 8.34 | 12.8 |
| 10 AM 12/20 | 8.15 | 12.2 |
| 4 PM 12/20 | 8.02 | 11.8 |
| 10 PM 12/20 | 7.93 | 11.5 |
| 4 AM 12/21 | 7.88 | 11.4 |
| 10 AM 12/21 | 7.21 | 9.41 |
| 4 PM 12/21 | 6.38 | 7.25 |
| 10 PM 12/21 | 6.42 | 7.35 |
| 4 AM 12/22 | 6.47 | 7.47 |
| 10 AM 12/22 | 6.5 | 7.55 |
| 4 PM 12/22 | 6.52 | 7.6 |
| 10 PM 12/22 | 6.53 | 7.62 |
| 4 AM 12/23 | 6.52 | 7.6 |
| 10 AM 12/23 | 6.49 | 7.52 |
| 4 PM 12/23 | 6.44 | 7.4 |
| 10 PM 12/23 | 6.4 | 7.3 |
| 4 AM 12/24 | 6.37 | 7.23 |
| 10 AM 12/24 | 6.34 | 7.15 |
| 4 PM 12/24 | 6.31 | 7.08 |
| 10 PM 12/24 | 6.3 | 7.06 |
| 4 AM 12/25 | 6.29 | 7.03 |
| 10 AM 12/25 | 6.28 | 7.01 |
| 4 PM 12/25 | 6.26 | 6.96 |
| 10 PM 12/25 | 6.27 | 6.98 |
| 4 AM 12/26 | 6.29 | 7.03 |
| 10 AM 12/26 | 6.29 | 7.03 |
| 4 PM 12/26 | 6.28 | 7.01 |
| 10 PM 12/26 | 6.28 | 7.01 |
| 4 AM 12/27 | 6.27 | 6.98 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 8:15 PM 12/17 | 5.03 | 4.17 |
| 8:00 PM 12/17 | 5.05 | 4.21 |
| 7:45 PM 12/17 | 5.04 | 4.19 |
| 7:30 PM 12/17 | 5.06 | 4.23 |
| 7:15 PM 12/17 | 5.05 | 4.21 |
| 7:00 PM 12/17 | 5.04 | 4.19 |
| 6:45 PM 12/17 | 5.05 | 4.21 |
| 6:30 PM 12/17 | 5.05 | 4.21 |
| 6:15 PM 12/17 | 5.08 | 4.27 |
| 6:00 PM 12/17 | 5.08 | 4.27 |
| 5:45 PM 12/17 | 5.08 | 4.27 |
| 5:30 PM 12/17 | 5.12 | 4.36 |
| 5:15 PM 12/17 | 5.13 | 4.38 |
| 5:00 PM 12/17 | 5.13 | 4.38 |
| 4:45 PM 12/17 | 5.14 | 4.4 |
| 4:30 PM 12/17 | 5.14 | 4.4 |
| 4:15 PM 12/17 | 5.14 | 4.4 |
| 4:00 PM 12/17 | 5.14 | 4.4 |
| 3:45 PM 12/17 | 5.15 | 4.42 |
| 3:30 PM 12/17 | 5.15 | 4.42 |
| 3:15 PM 12/17 | 5.16 | 4.44 |
| 3:00 PM 12/17 | 5.16 | 4.44 |
| 2:45 PM 12/17 | 5.15 | 4.42 |
| 2:30 PM 12/17 | 5.15 | 4.42 |
| 2:15 PM 12/17 | 5.16 | 4.44 |
| 2:00 PM 12/17 | 5.17 | 4.46 |
| 1:45 PM 12/17 | 5.15 | 4.42 |
| 1:30 PM 12/17 | 5.16 | 4.44 |
| 1:15 PM 12/17 | 5.15 | 4.42 |
| 1:00 PM 12/17 | 5.15 | 4.42 |
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.
