Prospect Creek at Thompson Falls
Critical Stages
6.5' - Action
7.5' - Flood
8' - Moderate
9' - Major
Latest Observation
Updated: 5:15 AM MST 12/18/25
Status: No Flooding
Stage: 4.67 ft
Flow: 1.29 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 11 AM 12/18 | 4.71 | 1.32 |
| 5 PM 12/18 | 4.43 | 1.14 |
| 11 PM 12/18 | 4.2 | 1.01 |
| 5 AM 12/19 | 4.21 | 1.02 |
| 11 AM 12/19 | 4.48 | 1.17 |
| 5 PM 12/19 | 4.72 | 1.32 |
| 11 PM 12/19 | 4.76 | 1.35 |
| 5 AM 12/20 | 4.62 | 1.26 |
| 11 AM 12/20 | 4.4 | 1.13 |
| 5 PM 12/20 | 4.17 | 0.998 |
| 11 PM 12/20 | 3.94 | 0.879 |
| 5 AM 12/21 | 3.75 | 0.789 |
| 11 AM 12/21 | 3.61 | 0.726 |
| 5 PM 12/21 | 3.5 | 0.679 |
| 11 PM 12/21 | 3.42 | 0.645 |
| 5 AM 12/22 | 3.37 | 0.625 |
| 11 AM 12/22 | 3.37 | 0.625 |
| 5 PM 12/22 | 3.41 | 0.641 |
| 11 PM 12/22 | 3.43 | 0.65 |
| 5 AM 12/23 | 3.42 | 0.645 |
| 11 AM 12/23 | 3.39 | 0.633 |
| 5 PM 12/23 | 3.35 | 0.617 |
| 11 PM 12/23 | 3.3 | 0.598 |
| 5 AM 12/24 | 3.26 | 0.582 |
| 11 AM 12/24 | 3.22 | 0.567 |
| 5 PM 12/24 | 3.19 | 0.556 |
| 11 PM 12/24 | 3.17 | 0.549 |
| 5 AM 12/25 | 3.18 | 0.552 |
| 11 AM 12/25 | 3.19 | 0.556 |
| 5 PM 12/25 | 3.19 | 0.556 |
| 11 PM 12/25 | 3.16 | 0.545 |
| 5 AM 12/26 | 3.13 | 0.534 |
| 11 AM 12/26 | 3.1 | 0.523 |
| 5 PM 12/26 | 3.07 | 0.513 |
| 11 PM 12/26 | 3.04 | 0.502 |
| 5 AM 12/27 | 3.01 | 0.492 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 5:15 AM 12/18 | 4.67 | 1.29 |
| 5:00 AM 12/18 | 4.7 | 1.31 |
| 4:45 AM 12/18 | 4.7 | 1.31 |
| 4:30 AM 12/18 | 4.68 | 1.3 |
| 4:15 AM 12/18 | 4.66 | 1.29 |
| 4:00 AM 12/18 | 4.7 | 1.31 |
| 3:45 AM 12/18 | 4.69 | 1.3 |
| 3:30 AM 12/18 | 4.69 | 1.3 |
| 3:15 AM 12/18 | 4.7 | 1.31 |
| 3:00 AM 12/18 | 4.68 | 1.3 |
| 2:45 AM 12/18 | 4.69 | 1.3 |
| 2:30 AM 12/18 | 4.67 | 1.29 |
| 2:15 AM 12/18 | 4.67 | 1.29 |
| 2:00 AM 12/18 | 4.67 | 1.29 |
| 1:45 AM 12/18 | 4.7 | 1.31 |
| 1:30 AM 12/18 | 4.68 | 1.3 |
| 1:15 AM 12/18 | 4.68 | 1.3 |
| 1:00 AM 12/18 | 4.7 | 1.31 |
| 12:45 AM 12/18 | 4.64 | 1.27 |
| 12:30 AM 12/18 | 4.67 | 1.29 |
| 12:15 AM 12/18 | 4.68 | 1.3 |
| 12:00 AM 12/18 | 4.66 | 1.29 |
| 11:45 PM 12/17 | 4.67 | 1.29 |
| 11:30 PM 12/17 | 4.66 | 1.29 |
| 11:15 PM 12/17 | 4.67 | 1.29 |
| 11:00 PM 12/17 | 4.68 | 1.3 |
| 10:45 PM 12/17 | 4.64 | 1.27 |
| 10:30 PM 12/17 | 4.63 | 1.27 |
| 10:15 PM 12/17 | 4.62 | 1.26 |
| 10:00 PM 12/17 | 4.62 | 1.26 |
8.5' -
A petroleum gas pipeline becomes exposed underneath the creek due to high flood flows.
8.19' -
Homes along Prospect Creek become surrounded with water from Prospect Creek.
8.1' -
Water begins flowing across Prospect Creek Road.
7.5' -
Road washouts are possible along Prospect Creek Road.
| Date | Stage (ft) |
|---|---|
| Jan 16, 1974 | 9.86 |
| Feb 9, 1996 | 9.54 |
| Mar 19, 2017 | 8.1 |
| May 21, 1956 | 7.6 |
| May 13, 1971 | 7.6 |
| May 19, 2008 | 7.27 |
| May 11, 1976 | 7.09 |
| Jun 1, 1972 | 7.09 |
| May 17, 1997 | 6.94 |
| Apr 25, 2012 | 6.52 |
| Dec 11, 2025 | 6.35 |
| Apr 14, 2002 | 6.23 |
| May 7, 2022 | 5.01 |
| May 31, 2020 | 4.54 |
| May 2, 2021 | 3.99 |
| Mar 28, 2025 | 3.55 |
Data provided by the National Weather Service.
