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Portneuf River at Topaz

Critical Stages
3.5' - Action
4.02' - Flood
Moderate
Major

Latest Observation

Updated: 11:15 PM MST 12/17/25

Status: No Flooding

Stage: 2.74 ft

Flow: 0.153 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
5 AM 12/18 2.75 0.155
11 AM 12/18 2.75 0.155
5 PM 12/18 2.73 0.151
11 PM 12/18 2.71 0.147
5 AM 12/19 2.69 0.144
11 AM 12/19 2.68 0.142
5 PM 12/19 2.71 0.147
11 PM 12/19 2.78 0.16
5 AM 12/20 2.85 0.174
11 AM 12/20 2.9 0.185
5 PM 12/20 2.93 0.191
11 PM 12/20 2.93 0.191
5 AM 12/21 2.92 0.189
11 AM 12/21 2.9 0.185
5 PM 12/21 2.9 0.185
11 PM 12/21 2.95 0.195
5 AM 12/22 3.04 0.216
11 AM 12/22 3.13 0.238
5 PM 12/22 3.23 0.264
11 PM 12/22 3.31 0.286
5 AM 12/23 3.34 0.295
11 AM 12/23 3.35 0.298
5 PM 12/23 3.33 0.292
11 PM 12/23 3.3 0.284
5 AM 12/24 3.25 0.27
11 AM 12/24 3.2 0.256
5 PM 12/24 3.17 0.248
11 PM 12/24 3.16 0.246
5 AM 12/25 3.18 0.251
11 AM 12/25 3.21 0.259
5 PM 12/25 3.25 0.27
11 PM 12/25 3.31 0.286
5 AM 12/26 3.35 0.298
11 AM 12/26 3.36 0.301
5 PM 12/26 3.36 0.301
11 PM 12/26 3.35 0.298
5 AM 12/27 3.32 0.289
TimeStage (ft)Flow (kcfs)
11:15 PM 12/17 2.74 0.153
11:00 PM 12/17 2.75 0.155
10:45 PM 12/17 2.76 0.157
10:30 PM 12/17 2.76 0.157
10:15 PM 12/17 2.75 0.155
10:00 PM 12/17 2.74 0.153
9:45 PM 12/17 2.75 0.155
9:30 PM 12/17 2.76 0.157
9:15 PM 12/17 2.75 0.155
9:00 PM 12/17 2.76 0.157
8:45 PM 12/17 2.77 0.159
8:30 PM 12/17 2.77 0.159
8:15 PM 12/17 2.77 0.159
8:00 PM 12/17 2.78 0.16
7:45 PM 12/17 2.79 0.162
7:30 PM 12/17 2.78 0.16
7:15 PM 12/17 2.79 0.162
7:00 PM 12/17 2.78 0.16
6:45 PM 12/17 2.76 0.157
6:30 PM 12/17 2.76 0.157
6:15 PM 12/17 2.73 0.151
6:00 PM 12/17 2.76 0.157
5:45 PM 12/17 2.74 0.153
5:30 PM 12/17 2.74 0.153
5:15 PM 12/17 2.73 0.151
5:00 PM 12/17 2.74 0.153
4:45 PM 12/17 2.73 0.151
4:30 PM 12/17 2.72 0.149
4:15 PM 12/17 2.7 0.145
4:00 PM 12/17 2.69 0.144
Hydrograph for Portneuf River at Topaz
4.02' - Lowland and crop field flooding possible from Pebble Creek to Inkom.
3.5' - Near bankfull from Pebble Creek Road downstream to Inkom. Isolated ponding in flat areas near Symons Road.
DateStage (ft)
Dec 23, 1964 6
Feb 25, 1957 5.71
Feb 20, 1980 5.59
Jan 22, 1969 5.56
May 21, 1984 5.42
May 18, 1996 5.39
May 14, 1971 5.32
Apr 10, 1976 5.27
May 18, 1997 5.24
May 31, 1983 5.2
May 2, 2006 5
Mar 23, 2018 4.92
May 15, 2011 4.83
Feb 22, 2017 4.51
Feb 11, 2007 4.04
Jun 8, 2010 3.89
Jun 12, 2009 3.83
Jan 21, 2012 3.75
Jun 2, 2019 3.72
Feb 15, 2014 3.55

Data provided by the National Weather Service.