Prospect Creek at Thompson Falls MT water level

Name: Prospect Creek at Thompson Falls MT 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, Prospect Creek, Montana, United States

Directions

Below flood stage

Water level

0.40ft Steady over the last 24 hours

Measured Oct 19, 2026, 12:15 PM PDT (28 min ago)

Flow: 35.6 cfs

History

7 days

Water level Forecast Minor flood stage

The forecast expects the river to fall to 0.33 ft by Tuesday, October 27 at 11:00 PM. Issued Monday, October 19 at 09:08 AM by NOAA National Weather Service.

What this means

The gauge at Prospect Creek at Thompson Falls MT reads 0.40 ft, a normal level.

It is 7.10 ft below the flood stage of 7.50 ft.

It has barely moved over the past 24 hours. The forecast expects the river to fall to 0.33 ft by Tuesday, October 27 at 11:00 PM. Over the past 30 days it has moved between 0.38 ft and 0.41 ft.

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

Key numbers

Highest on record: 9.86 ftJanuary 16, 1974
Forecast peak: 0.40 ftFriday, October 23 at 05:00 AM

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 7.50 ft, still 7.10 ft away.

What happens at each level

8.50 ft: A petroleum gas pipeline becomes exposed underneath the creek due to high flood flows.
8.19 ft: Homes along Prospect Creek become surrounded with water from Prospect Creek.
8.10 ft: Water begins flowing across Prospect Creek Road.
7.50 ft: Road washouts are possible along Prospect Creek Road.
0.40 ft: Right now

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

Highest crests on record

Chance of at least minor flooding in October to December: < 5 %.

Rank	Level	Date
1	9.86 ft	January 16, 1974
2	9.54 ft	February 9, 1996
3	8.10 ft	March 19, 2017
4	7.60 ft	May 13, 1971
5	7.60 ft	May 21, 1956
6	7.27 ft	May 19, 2008
7	7.09 ft	May 11, 1976
8	7.09 ft	June 1, 1972
9	6.94 ft	May 17, 1997
10	6.52 ft	April 25, 2012

Weather at the gauge

The forecast is not available right now.

Sunrise 07:07 AM Sunset 05:47 PM Daylight 10 hr, 41 min First quarter 61%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Thompson River near Thompson Falls MTRiver gauge, Thompson River	2.73 ft	Below flood stage	±0	5.9 mi
St. Regis River near St. RegisRiver gauge, St. Regis River	1.73 ft	Below flood stage	±0	23 mi
Clark Fork at St. Regis MTRiver gauge, Clark Fork	5.41 ft	Below flood stage	−0.02 ft	23 mi
Clark Fork near Plains MTRiver gauge, Clark Fork	4.57 ft	Below flood stage	−0.01 ft	26 mi
Canyon Creek above Mouth at WallaceRiver gauge, Canyon Creek	10.4 cfs	Very low	±0	27 mi
Ninemile Creek above Mouth at WallaceRiver gauge, Ninemile Creek	3.0 cfs	Normal	+0.1 cfs	28 mi
Sf Coeur D Alene River above Placer Creek at WallaceRiver gauge, Sf Coeur D Alene River	32.1 cfs	Low	±0	28 mi
Nf Coeur D Alene River above Shoshone Creek near PrichardRiver gauge, Nf Coeur D Alene River	70.9 cfs	Very low	±0	30 mi

Questions and answers

What is flood stage for Prospect Creek at Thompson Falls MT?

The official flood stage is 7.50 ft. The level is currently 7.10 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 Prospect Creek at Thompson Falls MT today?

On Oct 19, 2026, 12:15 PM PDT, the water level was 0.40 ft. Steady over the last 24 hours.

Is Prospect Creek at Thompson Falls MT rising or falling?

Steady over the last 24 hours.

Is the level of Prospect Creek at Thompson Falls MT normal?

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

What is the highest water level ever recorded at Prospect Creek at Thompson Falls MT?

The highest level on record is 9.86 ft on January 16, 1974.

Is Prospect Creek at Thompson Falls MT expected to rise?

The forecast expects the river to fall to 0.33 ft by Tuesday, October 27 at 11:00 PM.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:12390700 (Agency page)
Coordinates: 47.58606, -115.35510 (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	0.40 ft	2026-10-19 19:15	Provisional
Flow	35.6 cfs	2026-10-19 19:15	Provisional

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How to cite

U.S. Geological Survey: Prospect Creek at Thompson Falls MT (usgs:12390700). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/montana/prospect-creek-at-thompson-falls-mt

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