Portneuf River at Pocatello
Critical Stages
8' - Action
8.5' - Flood
10' - Moderate
11' - Major
Latest Observation
Updated: 5:45 PM MST 12/17/25
Status: No Flooding
Stage: 4.5 ft
Flow: 0.193 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 11 PM 12/17 | 4.73 | 0.218 |
| 5 AM 12/18 | 4.75 | 0.22 |
| 11 AM 12/18 | 4.76 | 0.222 |
| 5 PM 12/18 | 4.75 | 0.22 |
| 11 PM 12/18 | 4.73 | 0.218 |
| 5 AM 12/19 | 4.72 | 0.217 |
| 11 AM 12/19 | 4.7 | 0.215 |
| 5 PM 12/19 | 4.81 | 0.227 |
| 11 PM 12/19 | 4.96 | 0.244 |
| 5 AM 12/20 | 5.05 | 0.255 |
| 11 AM 12/20 | 5.09 | 0.259 |
| 5 PM 12/20 | 5.1 | 0.261 |
| 11 PM 12/20 | 5.1 | 0.261 |
| 5 AM 12/21 | 5.09 | 0.259 |
| 11 AM 12/21 | 5.09 | 0.259 |
| 5 PM 12/21 | 5.19 | 0.271 |
| 11 PM 12/21 | 5.38 | 0.295 |
| 5 AM 12/22 | 5.63 | 0.327 |
| 11 AM 12/22 | 5.88 | 0.36 |
| 5 PM 12/22 | 6.11 | 0.392 |
| 11 PM 12/22 | 6.23 | 0.409 |
| 5 AM 12/23 | 6.27 | 0.415 |
| 11 AM 12/23 | 6.28 | 0.416 |
| 5 PM 12/23 | 6.27 | 0.415 |
| 11 PM 12/23 | 6.26 | 0.413 |
| 5 AM 12/24 | 6.23 | 0.409 |
| 11 AM 12/24 | 6.21 | 0.406 |
| 5 PM 12/24 | 6.21 | 0.406 |
| 11 PM 12/24 | 6.23 | 0.409 |
| 5 AM 12/25 | 6.28 | 0.416 |
| 11 AM 12/25 | 6.32 | 0.422 |
| 5 PM 12/25 | 6.43 | 0.438 |
| 11 PM 12/25 | 6.49 | 0.447 |
| 5 AM 12/26 | 6.5 | 0.448 |
| 11 AM 12/26 | 6.49 | 0.447 |
| 5 PM 12/26 | 6.45 | 0.441 |
| 11 PM 12/26 | 6.42 | 0.436 |
| 5 AM 12/27 | 6.39 | 0.432 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 5:45 PM 12/17 | 4.5 | 0.193 |
| 5:30 PM 12/17 | 4.51 | 0.195 |
| 5:15 PM 12/17 | 4.51 | 0.195 |
| 5:00 PM 12/17 | 4.51 | 0.195 |
| 4:45 PM 12/17 | 4.51 | 0.195 |
| 4:30 PM 12/17 | 4.52 | 0.196 |
| 4:15 PM 12/17 | 4.52 | 0.196 |
| 4:00 PM 12/17 | 4.52 | 0.196 |
| 3:45 PM 12/17 | 4.52 | 0.196 |
| 3:30 PM 12/17 | 4.53 | 0.197 |
| 3:15 PM 12/17 | 4.54 | 0.198 |
| 3:00 PM 12/17 | 4.53 | 0.197 |
| 2:45 PM 12/17 | 4.53 | 0.197 |
| 2:30 PM 12/17 | 4.54 | 0.198 |
| 2:15 PM 12/17 | 4.53 | 0.197 |
| 2:00 PM 12/17 | 4.52 | 0.196 |
| 1:45 PM 12/17 | 4.54 | 0.198 |
| 1:30 PM 12/17 | 4.55 | 0.199 |
| 1:15 PM 12/17 | 4.56 | 0.2 |
| 1:00 PM 12/17 | 4.58 | 0.202 |
| 12:45 PM 12/17 | 4.6 | 0.204 |
| 12:30 PM 12/17 | 4.62 | 0.206 |
| 12:15 PM 12/17 | 4.63 | 0.207 |
| 12:00 PM 12/17 | 4.64 | 0.208 |
| 11:45 AM 12/17 | 4.65 | 0.209 |
| 11:30 AM 12/17 | 4.63 | 0.207 |
| 11:15 AM 12/17 | 4.61 | 0.205 |
| 11:00 AM 12/17 | 4.58 | 0.202 |
| 10:45 AM 12/17 | 4.55 | 0.199 |
| 10:30 AM 12/17 | 4.55 | 0.199 |
10' -
Significant flooding of agricultural land will occur from the Inkom and Blackrock area. Lowland flooding will occur along sections of the river in Pocatello from Portneuf Gap to the Cheyenne Avenue Bridge and downstream of the concrete channel beginning at Sacajawea Park.
9.4' -
Water will encroach around sitting benches near the river at the Pacific Recycling Trailhead.
9.15' -
Flooding of low lying agricultural land and pasture will occur in the Inkom and Blackrock area. Lowland flooding is likely along sections of the river between Portneuf Gap and the Cheyenne Avenue Bridge in Pocatello.
8.5' -
Sections of Sacajawea Park will be under water and the trail is usually closed at this level. Marsh Creek near Inkom may also be over its banks.
8' -
Water will encroach onto portions of the bike and walking trail next to the river in Sacajawea Park in Pocatello.
| Date | Stage (ft) |
|---|---|
| May 17, 1984 | 13.85 |
| May 31, 1983 | 11.19 |
| May 30, 2023 | 11.14 |
| May 3, 2006 | 10.52 |
| May 27, 2011 | 9.95 |
| May 14, 2017 | 9.83 |
| May 14, 1971 | 9.59 |
| Apr 26, 1986 | 9.41 |
| May 19, 1975 | 9.4 |
| Apr 27, 2019 | 9.26 |
| May 20, 1997 | 9.14 |
| May 31, 1996 | 9.07 |
| May 13, 1976 | 9 |
| Apr 30, 2018 | 8.66 |
| May 11, 1974 | 8.32 |
| May 18, 1993 | 8.3 |
| May 9, 1972 | 8.19 |
| Jan 22, 2012 | 8.06 |
| Feb 12, 2007 | 7.76 |
| Apr 25, 1969 | 7.62 |
Data provided by the National Weather Service.
