Kootenai River at Porthill

Last updated: Jun 21, 2025, 2:16 AM UTC

No watches, warnings or advisories are in effect for this area.

Downstream gauge unavailable

Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.

No secondary data available. Transformations for Flow data and a secondary Y axis cannot be made at this time.

IJC
USACE

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Traces and Thresholds Click to turn on/off display

Observed (OBS) 06/20/2025 5:45 PM PDT

Official Forecast (FCST) 06/20/2025 3:23 PM PDT

Record: 72.7 ft

Low Threshold: 39 ft

Reliability of the Forecast:

NOTE: Forecasts are issued routinely year-round.

Gauge readings can be affected by backwater from downstream lake.
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Gauge Info

Coordinates	48.9964, -116.507
RFC	NWRFC
State	ID
WFO	OTX
County	Boundary
Data Provider(s)
International Joint Commission	IJC
US Army Corp of Engineers - Seattle District	USACE
US Geological Survey	USGS
USGS	12322000

Gauge Location

Recent Crests

1.	49.43 ft	on 05-29-2024	(P)
2.	51.73 ft	on 05-22-2023
3.	55.94 ft	on 06-15-2022
4.	50.46 ft	on 05-25-2021
5.	54.24 ft	on 06-01-2020

Historic Crests

1.	72.70 ft	on 06-01-1894
2.	67.61 ft	on 06-07-1961
3.	66.16 ft	on 06-01-1948
4.	65.44 ft	on 06-23-1950
5.	65.17 ft	on 05-22-1954

Low Water Records

1.	38.21 ft	on 04-03-1944
2.	39.70 ft	on 10-31-2020
3.	40.59 ft	on 04-02-2024

(P) - Preliminary values subject to further review
¹ - Gauge datum changed during this year

Vertical Datum Table

type	NGVD29
major Flooding	N/A
moderate Flooding	N/A
minor Flooding	N/A
action	N/A
Latest Value	1747.23 ft
Gauge Zero	1700.00 ft

Gauge Photos

Photo 1 of 1

View from downstream of gauge

Probability Information

No Images Available

Unique Local Info

Stage elevations affected by backwater from Kootenay Lake.

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

Resources

Hydrologic Resource Links

Additional Resource Links

WFO Information

Weather Forecast Office

Spokane

2601 N. Rambo Rd.

Spokane, WA 99224

(509) 244-0110

Ask Questions/Webmaster

Official Homepage

1.	49.43 ft	on 05-29-2024	(P)
2.	51.73 ft	on 05-22-2023
3.	55.94 ft	on 06-15-2022
4.	50.46 ft	on 05-25-2021
5.	54.24 ft	on 06-01-2020
6.	49.16 ft	on 06-03-2019
7.	56.03 ft	on 05-18-2018
8.	48.05 ft	on 03-20-2017
9.	52.45 ft	on 05-24-2016
10.	48.45 ft	on 05-25-2015
11.	53.34 ft	on 05-18-2014
12.	54.30 ft	on 05-14-2013
13.	55.95 ft	on 06-09-2012
14.	56.13 ft	on 06-11-2011
15.	57.18 ft	on 06-20-2006
16.	58.84 ft	on 06-02-1972
17.	67.61 ft	on 06-07-1961
18.	65.17 ft	on 05-22-1954
19.	65.44 ft	on 06-23-1950
20.	66.16 ft	on 06-01-1948
21.	64.08 ft	on 05-29-1938
22.	72.70 ft	on 06-01-1894

1.	72.70 ft	on 06-01-1894
2.	67.61 ft	on 06-07-1961
3.	66.16 ft	on 06-01-1948
4.	65.44 ft	on 06-23-1950
5.	65.17 ft	on 05-22-1954
6.	64.08 ft	on 05-29-1938
7.	58.84 ft	on 06-02-1972
8.	57.18 ft	on 06-20-2006
9.	56.13 ft	on 06-11-2011
10.	56.03 ft	on 05-18-2018
11.	55.95 ft	on 06-09-2012
12.	55.94 ft	on 06-15-2022
13.	54.30 ft	on 05-14-2013
14.	54.24 ft	on 06-01-2020
15.	53.34 ft	on 05-18-2014
16.	52.45 ft	on 05-24-2016
17.	51.73 ft	on 05-22-2023
18.	50.46 ft	on 05-25-2021
19.	49.43 ft	on 05-29-2024	(P)
20.	49.16 ft	on 06-03-2019
21.	48.45 ft	on 05-25-2015
22.	48.05 ft	on 03-20-2017