« Back to Two Ocean Lake Trail Rivers

Snake River at Flagg Ranch

Critical Stages
9' - Action
10' - Flood
11' - Moderate
Major

Latest Observation

Updated: 4:30 PM MST 12/15/25

Status: No Flooding

Stage: 2.54 ft

Flow: 0.316 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
11 PM 12/15 2.27 0.217
5 AM 12/16 2.27 0.217
11 AM 12/16 2.27 0.217
5 PM 12/16 2.27 0.217
11 PM 12/16 2.27 0.217
5 AM 12/17 2.27 0.217
11 AM 12/17 2.27 0.217
5 PM 12/17 2.26 0.214
11 PM 12/17 2.26 0.214
5 AM 12/18 2.26 0.214
11 AM 12/18 2.26 0.214
5 PM 12/18 2.26 0.214
11 PM 12/18 2.26 0.214
5 AM 12/19 2.26 0.214
11 AM 12/19 2.26 0.214
5 PM 12/19 2.26 0.214
11 PM 12/19 2.26 0.214
5 AM 12/20 2.26 0.214
11 AM 12/20 2.26 0.214
5 PM 12/20 2.26 0.214
11 PM 12/20 2.26 0.214
5 AM 12/21 2.26 0.214
11 AM 12/21 2.26 0.214
5 PM 12/21 2.26 0.214
11 PM 12/21 2.26 0.214
5 AM 12/22 2.26 0.214
11 AM 12/22 2.26 0.214
5 PM 12/22 2.26 0.214
11 PM 12/22 2.26 0.214
5 AM 12/23 2.26 0.214
11 AM 12/23 2.26 0.214
5 PM 12/23 2.26 0.214
11 PM 12/23 2.26 0.214
5 AM 12/24 2.26 0.214
11 AM 12/24 2.26 0.214
5 PM 12/24 2.26 0.214
11 PM 12/24 2.26 0.214
5 AM 12/25 2.25 0.211
TimeStage (ft)Flow (kcfs)
4:30 PM 12/15 2.54 0.316
4:15 PM 12/15 2.56 0.325
4:00 PM 12/15 2.57 0.329
3:45 PM 12/15 2.58 0.333
3:30 PM 12/15 2.58 0.333
3:15 PM 12/15 2.57 0.329
3:00 PM 12/15 2.51 0.304
2:45 PM 12/15 2.43 0.274
2:30 PM 12/15 2.36 0.248
2:15 PM 12/15 2.35 0.245
2:00 PM 12/15 2.36 0.248
1:45 PM 12/15 2.38 0.255
1:30 PM 12/15 2.37 0.252
1:15 PM 12/15 2.33 0.238
1:00 PM 12/15 2.29 0.224
12:45 PM 12/15 2.29 0.224
12:30 PM 12/15 2.29 0.224
12:15 PM 12/15 2.29 0.224
12:00 PM 12/15 2.29 0.224
11:45 AM 12/15 2.29 0.224
11:30 AM 12/15 2.3 0.227
11:15 AM 12/15 2.3 0.227
11:00 AM 12/15 2.3 0.227
10:45 AM 12/15 2.3 0.227
10:30 AM 12/15 2.3 0.227
10:15 AM 12/15 2.3 0.227
10:00 AM 12/15 2.31 0.231
9:45 AM 12/15 2.31 0.231
9:30 AM 12/15 2.31 0.231
9:15 AM 12/15 2.31 0.231
Hydrograph for Snake River at Flagg Ranch
11' - Lower sections of downstream parking lot may be under water. Flagg Ranch campgrounds still not affected.
10.75' - Record stage and flow---15,000 cfs (6/5/1996).
10' - Flood stage. Minor flooding along lower sections of parking lot 300 feet downstream of gage on right bank.
9' - Bankfull stage.
DateStage (ft)
Jun 5, 1996 10.75
Jun 5, 1997 10.16
Jun 6, 1986 9.41
Jun 6, 1995 9.3
Jun 24, 2011 9.25
May 31, 2009 9.13
May 28, 2014 9.03
Jun 5, 2017 8.74
May 22, 2006 8.72
May 25, 1991 8.71
May 21, 1993 8.6
May 31, 2002 8.59
May 28, 1999 8.55
May 30, 1998 8.55
Jun 1, 2020 8.52
May 29, 2003 8.46
Jun 4, 2010 8.46
May 20, 2005 8.42
May 31, 1984 8.39
May 26, 2018 8.29

Data provided by the National Weather Service.