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Portneuf River at Tyhee

Highest listed crest 6.76 ftFlood stage 6.2 ft21 crests since 1985

The Portneuf River at Tyhee crested above flood stage 3 times among the 21 crests the National Weather Service lists from 1985 to 2022. The highest, 6.76 ft on May 6, 1986, was minor flooding, 0.53 feet above flood stage.

The gauge

Highest listed crest
6.76 ft
May 6, 1986; 1,740 cubic feet per second
Flood stage
6.2 ft
No major stage set
Crests at major
0
3 above flood stage
Most recent flood crest
September 3, 2013
6.69 ft, minor flooding
Location
Bannock County
Near Chubbuck (4.5 mi), Pocatello (6.6 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Portneuf River at Tyhee
Action stage5.85Apr 26, 2019The level at which the NWS or its partners begin to take action
Flood stage (minor)6.23Sep 3, 2013Minimal or no property damage, but possibly some public threat

Every listed crest

21 crests from 1985 to 2022. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Portneuf River at Tyhee, 1985 to 2022 34567ft Flood stage 6.2 ft May 5, 1985: 5.47 ft, below flood stage; 1,400 cubic feet per secondMay 6, 1986: 6.76 ft, minor flooding; 1,740 cubic feet per secondMar 9, 1987: 5.11 ft, below flood stage; 1,020 cubic feet per secondFeb 28, 1994: 5.10 ft, below flood stage; 1,050 cubic feet per secondMay 3, 2006: 6.44 ft, minor flooding; 1,630 cubic feet per secondFeb 12, 2007: 5.49 ft, below flood stage; 1,070 cubic feet per secondMay 1, 2008: 4.35 ft, below flood stage; 662 cubic feet per secondJun 18, 2009: 4.98 ft, below flood stage; 932 cubic feet per secondJun 7, 2010: 5.44 ft, below flood stage; 835 cubic feet per secondMay 30, 2011: 6.09 ft, action stage; 1,400 cubic feet per secondJan 22, 2012: 5.68 ft, below flood stage; 1,120 cubic feet per secondSep 3, 2013: 6.69 ft, minor flooding; 878 cubic feet per secondFeb 16, 2014: 5.65 ft, below flood stage; 928 cubic feet per secondMay 23, 2015: 6.05 ft, action stage; 683 cubic feet per secondApr 15, 2016: 4.92 ft, below flood stage; 839 cubic feet per secondMay 12, 2017: 6.04 ft, action stage; 1,380 cubic feet per secondMar 26, 2018: 6.01 ft, action stage; 1,240 cubic feet per secondApr 26, 2019: 5.95 ft, action stage; 1,280 cubic feet per secondApr 28, 2020: 4.91 ft, below flood stage; 869 cubic feet per secondOct 15, 2021: 5.21 ft, below flood stage; 722 cubic feet per secondMay 8, 2022: 3.93 ft, below flood stage; 534 cubic feet per second Highest, 6.76 ft, May 6, 1986 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Portneuf River at Tyhee 1980s: 1 1 1990s: 0 2000s: 1 2010s: 1 2020s: 0 1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Portneuf River at Tyhee
1May 6, 19866.76+0.53Minor1,740
2Sep 3, 20136.69+0.46Minor878
3May 3, 20066.44+0.21Minor1,630
4May 30, 20116.09−0.14Action1,400
5May 23, 20156.05−0.18Action683
6May 12, 20176.04−0.19Action1,380
7Mar 26, 20186.01−0.22Action1,240
8Apr 26, 20195.95−0.28Action1,280
9Jan 22, 20125.68−0.55Below flood stage1,120
10Feb 16, 20145.65−0.58Below flood stage928
11Feb 12, 20075.49−0.74Below flood stage1,070
12May 5, 19855.47−0.76Below flood stage1,400
13Jun 7, 20105.44−0.79Below flood stage835
14Oct 15, 20215.21−1.02Below flood stage722
15Mar 9, 19875.11−1.12Below flood stage1,020
16Feb 28, 19945.10−1.13Below flood stage1,050
17Jun 18, 20094.98−1.25Below flood stage932
18Apr 15, 20164.92−1.31Below flood stage839
19Apr 28, 20204.91−1.32Below flood stage869
20May 1, 20084.35−1.88Below flood stage662
21May 8, 20223.93−2.30Below flood stage534

The worst floods along the Portneuf River

For this gauge's highest crests, the other gauges on the Portneuf River that crested above flood stage within a week.

May 3, 2006: 6.44 ft here, minor flooding

  • PocatelloID · May 3, 2006 · 10.52 ft · Moderate
  • TopazID · May 2, 2006 · 5.00 ft · Minor

Gauges on the Portneuf River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Portneuf River
TopazID4.06.00 ft, Dec 23, 19640
PocatelloID8.513.85 ft, May 17, 19843
Tyhee this gaugeID6.26.76 ft, May 6, 19860

Other gauges in Bannock County

Flood gauges in Bannock County
McCammon5.613.85 ft, May 17, 19840
Pocatello8.513.85 ft, May 17, 19843
Topaz4.06.00 ft, Dec 23, 19640

Bannock County: every hazard · River floods across the country · Idaho

NOAA National Water Prediction Service, gauge PTYI1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.