How high is the Thompson River Near Thompson Falls Mount right now?

The Thompson River Near Thompson Falls Mount is currently flowing at 640 cubic feet per second with a gage height of 3.73 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Thompson River Near Thompson Falls Mount normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 29th percentile compared to the long-term historical record at this gauge.

Is the Thompson River Near Thompson Falls Mount at flood stage?

No — the gage height is 3.27 feet below the NWS flood-stage threshold of 7.0 feet.

What is the historical median flow for the Thompson River Near Thompson Falls Mount on June 11?

The long-term median discharge for this date is 891 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 365 to 2,400 cfs.

Where is the Thompson River Near Thompson Falls Mount stream gauge located?

The Thompson River Near Thompson Falls Mount stream gauge is operated by the USGS in Sanders County, MT on the Thompson River. USGS site number 12389500 (coordinates 47.5919, -115.2295).

Thompson River Near Thompson Falls Mount

USGS Site No: 12389500 • Thompson River • Sanders County, MT

Thompson River Near Thompson Falls Mount on the Thompson River is currently at 640 cfs (Normal — 29th percentile for this date) . Gage height: 3.73 ft.

Reading from 1 week ago

640

CFS Discharge

3.73

Gage Height (ft)

Normal

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	365
25th	Low threshold	599
50th (Median)	Normal (median)	891	Today: 640 cfs
75th	High threshold	1,280
95th	Very High threshold	2,400

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	630	—
May 27, 2026	625	—
May 26, 2026	590	—
May 25, 2026	572	—
May 24, 2026	561	—
May 23, 2026	564	—
May 22, 2026	577	—
May 21, 2026	599	—
May 20, 2026	611	—
May 19, 2026	640	—
May 18, 2026	682	—
May 17, 2026	730	—
May 16, 2026	773	—
May 15, 2026	829	—
Apr 20, 2026	787	—
Apr 19, 2026	821	—
Apr 18, 2026	864	—
Apr 17, 2026	920	—
Apr 16, 2026	990	—
Apr 15, 2026	1,030	—
Apr 14, 2026	1,060	—
Apr 13, 2026	1,050	—
Apr 12, 2026	964	—
Apr 11, 2026	905	—
Apr 10, 2026	887	—
Apr 9, 2026	889	—
Apr 8, 2026	878	—
Apr 7, 2026	829	—
Apr 6, 2026	797	—
Apr 5, 2026	810	—

Station Information

USGS Site No: 12389500
State: MT
County: Sanders County
Coordinates: 47.5919, -115.2295
Drainage Area: 638 mi²
Datum (ft): 2,430.0
HUC Code: 17010213

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 6.5 ft
Flood Stage: 7.0 ft

Currently 3.27 ft below flood stage.

Recent Extremes

Max discharge: 2,330 cfs

Mar 22, 2026
Min discharge: 90 cfs

Sep 27, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Prospect Creek at Thompson Falls Mount
5.9 mi · 321 cfs

Normal
Clark Fork Near Plains Mount
20.7 mi · 59,600 cfs

Normal
St. Regis River Near St. Regis, Mount
21.0 mi · 708 cfs

Low
Clark Fork at St. Regis Mount
21.1 mi · 22,300 cfs

Normal
Sf Coeur D Alene River above Deadman Gulch near Mullan ID
26.4 mi · 101 cfs

Very High