Portneuf River near Tyhee water level

Name: Portneuf River near Tyhee water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Portneuf River, Idaho, United States

Directions

Below flood stage

Water level

4.59ft Steady over the last 24 hours

Measured Oct 19, 2026, 07:00 PM MDT (1 hour ago)

Flow: 275 cfs

History

7 days

Water level Minor flood stage

What this means

The gauge at Portneuf River near Tyhee reads 4.59 ft, a normal level.

It is 1.64 ft below the flood stage of 6.23 ft.

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 4.54 ft and 4.68 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 6.76 ftMay 6, 1986

What the stage means on the water

A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.

The National Weather Service puts flood stage for this gauge at 6.23 ft, still 1.64 ft away.

What happens at each level

6.23 ft: Lowland field and crop flooding possible from US HWY 30 bridge near Simplot Plant to American Falls Reservoir.
5.83 ft: Near bankfull from US HWY 30 bridge near Simplot Plant to American Falls Reservoir. Some ponding possible in low-lying areas.
4.59 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	6.76 ft	May 6, 1986
2	6.69 ft	September 3, 2013
3	6.44 ft	May 3, 2006
4	6.09 ft	May 30, 2011
5	6.05 ft	May 23, 2015
6	6.04 ft	May 12, 2017
7	6.01 ft	March 26, 2018
8	5.95 ft	April 26, 2019
9	5.68 ft	January 22, 2012
10	5.65 ft	February 16, 2014

Weather at the gauge

No rain in the last 3 days.

18 Sun 68° 34° – Wind 8 mph

19 Mon 70° 39° – Wind 13 mph

20 Tue 70° 54° 0.01 in Wind 15 mph

21 Wed 72° 50° 0.01 in Wind 12 mph

22 Thu 72° 54° 0.04 in, 65% Wind 13 mph

23 Fri 54° 46° 0.27 in, 73% Wind 15 mph

24 Sat 57° 41° – Wind 6 mph

Forecast: Open-Meteo

Sunrise 07:50 AM Sunset 06:41 PM Daylight 10 hr, 51 min First quarter 64%

Map

Other gauges on the Portneuf River

Gauge	Level	Compared with normal	24 hours	Distance
Portneuf River at PebbleRiver gauge, Portneuf River	5.14 ft	No reference yet	+0.01 ft	31 mi
Portneuf River at TopazRiver gauge, Portneuf River	2.48 ft	Below flood stage	+0.01 ft	32 mi
Portneuf River at PocatelloRiver gauge, Portneuf River	3.70 ft	Below flood stage	−0.04 ft	6 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Spring Creek at Sheepskin Road near Fort HallRiver gauge, Spring Creek	217 cfs	Very low	−5.0 cfs	7 mi
Snake River near BlackfootRiver gauge, Snake River	2.93 ft	Below flood stage	−0.16 ft	13 mi
Blackfoot River and Bypass Channel near BlackfootRiver gauge, Blackfoot River and Bypass Channel	92.3 cfs	Low	−69.7 cfs	13 mi
Blackfoot River near BlackfootRiver gauge, Blackfoot River	2.64 ft	Below flood stage	−0.46 ft	13 mi
Blackfoot River Bypass near BlackfootRiver gauge, Blackfoot River Bypass	14.6 cfs	Low	−41.2 cfs	18 mi
Blackfoot River below North Canal at BlackfootRiver gauge, Blackfoot River	88.4 cfs	Very low	−83.6 cfs	19 mi
Snake River at BlackfootRiver gauge, Snake River	5.27 ft	Below flood stage	−0.04 ft	20 mi
American Falls ReservoirReservoir	4,313.23 ft	Low		20 mi

Questions and answers

What is flood stage for the Portneuf River near Tyhee?

The official flood stage is 6.23 ft. The level is currently 1.64 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Portneuf River near Tyhee today?

On Oct 19, 2026, 07:00 PM MDT, the water level was 4.59 ft. Steady over the last 24 hours.

Is Portneuf River near Tyhee rising or falling?

Steady over the last 24 hours.

Is the level of Portneuf River near Tyhee normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Portneuf River near Tyhee?

The highest level on record is 6.76 ft on May 6, 1986.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:13075910 (Agency page)
Coordinates: 42.94472, -112.54444 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	4.59 ft	2026-10-20 01:00	Provisional
Flow	275 cfs	2026-10-20 01:00	Provisional

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How to cite

U.S. Geological Survey: Portneuf River near Tyhee (usgs:13075910). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/idaho/portneuf-river-near-tyhee

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer