Kootenai River at Porthill water level
River gauge, Kootenai River, Idaho, United States
Right now
Low for mid-October
Water level
- Flow
- 4,490 cfs
- Water temperature
- 50 °F
History
20252026
What this means
At 43.95 ft, the Kootenai River at Porthill is below normal for mid-October.
The median for mid-October is 45.72 ft, based on 66 years of readings, so the river stage is 1.76 ft below typical. On the same day last year the reading was 43.88 ft, a difference of +0.07 ft.
It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 43.92 ft and 44.31 ft.
Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that. The water temperature at the gauge is 50 °F.
Compared with 66 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 45.72 ft1.76 ft below the median for this date
- Normal for this date
- 43.10 ft – 47.05 ft8 years in 10 fall in this range (66 years of records)
- Same day last year
- 43.88 ft+0.07 ft
- Lowest and highest in 30 days
- 43.92 ft – 44.31 ft
- Lowest and highest in 12 months
- 41.70 ft – 51.21 ft
- Highest on record
- 72.70 ftJune 1, 1894
- Lowest on record
- 38.21 ftApril 3, 1944
What the stage means on the water
Low water means more dragging on shallow riffles and slower floats. Fish crowd into the deeper runs, and warm, low water stresses them, so play and release them quickly.
Highest crests on record
| Rank | Level | Date |
|---|---|---|
| 1 | 72.70 ft | June 1, 1894 |
| 2 | 67.61 ft | June 7, 1961 |
| 3 | 66.16 ft | June 1, 1948 |
| 4 | 65.44 ft | June 23, 1950 |
| 5 | 65.17 ft | May 22, 1954 |
| 6 | 64.08 ft | May 29, 1938 |
| 7 | 58.84 ft | June 2, 1972 |
| 8 | 57.18 ft | June 20, 2006 |
| 9 | 56.13 ft | June 11, 2011 |
| 10 | 56.03 ft | May 18, 2018 |
Weather at the gauge
No rain in the last 3 days.
Forecast: Open-Meteo
Map
Other gauges on the Kootenai River
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Kootenai River below Libby Dam near Libby MTRiver gauge, Kootenai River | 17.99 ft | Below flood stage | +0.14 ft | 68 mi |
| Kootenai River at LeoniaRiver gauge, Kootenai River | 10.32 ft | Very low | −0.01 ft | 34 mi |
| Kootenai River at Bonners FerryRiver gauge, Kootenai River | 45.24 ft | Low | ±0 | 22 mi |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Boundary Creek near PorthillRiver gauge, Boundary Creek | 22.0 cfs | Low | ±0 | 2.8 mi |
| Sullivan Creek near CanyonRiver gauge, Sullivan Creek | 0.03 m | Very low | ±0 | 13 km |
| Arrow Creek near EricksonRiver gauge, Arrow Creek | 0.30 m | Normal | ±0 | 19 km |
| Moyie River at EastportRiver gauge, Moyie River | 3.31 ft | Low | ±0 | 15 mi |
| Kootenay Lake at KuskonookLake, Kootenay Lake | 531.44 m | Normal | +0.01 m | 35 km |
| Kootenai River Bel Moyie River near Bonners FerryRiver gauge, Kootenai River Bel Moyie River | 4,960 cfs | Normal | −20.0 cfs | 25 mi |
| Salmo River near SalmoRiver gauge, Salmo River | 0.49 m | Low | ±0 | 58 km |
| Moyie River above Noke CreekRiver gauge, Moyie River | 1.78 m | Normal | ±0 | 58 km |
Questions and answers
Is the Kootenai River at Porthill higher than last year?
Yes, it is 0.07 ft higher than on the same day last year, when the reading was 43.88 ft.
What is a normal level for the Kootenai River at Porthill in mid-October?
The median for mid-October is 45.72 ft. In 8 years out of 10 the reading falls between 43.10 ft and 47.05 ft, based on 66 years of records.
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 Kootenai River at Porthill today?
On Oct 19, 2026, 08:45 AM PDT, the water level was 43.95 ft. Steady over the last 24 hours.
Is Kootenai River at Porthill rising or falling?
Steady over the last 24 hours. Down 0.18 ft over the last 7 days.
Is the level of Kootenai River at Porthill normal?
Low for mid-October. Compared with 66 years of daily readings for this time of year.
What is the highest water level ever recorded at Kootenai River at Porthill?
The highest level on record is 72.70 ft on June 1, 1894. The lowest is 38.21 ft on April 3, 1944.
For specialists
Station codes, datum, parameters, data quality and downloads
- Operator
- U.S. Geological Survey
- Station code
usgs:12322000(Agency page)- Coordinates
48.99639, -116.50750(WGS84)- Vertical datum
- NGVD29
- 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 | 43.95 ft | 2026-10-19 15:45 | Provisional |
| Flow | 4,490 cfs | 2026-10-19 15:45 | Provisional |
| Water temperature | 50 °F | 2026-10-19 15:45 | Provisional |
Download
Embed this gauge
Add a live card for this gauge to your website. It updates on its own and links back here.
How to cite
U.S. Geological Survey: Kootenai River at Porthill (usgs:12322000). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/idaho/kootenai-river-at-porthill
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