How high is the Prospect Creek at Thompson Falls Mount right now?

The Prospect Creek at Thompson Falls Mount is currently flowing at 321 cubic feet per second with a gage height of 2.36 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Prospect Creek at Thompson Falls Mount normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 30th percentile compared to the long-term historical record at this gauge.

Is the Prospect Creek at Thompson Falls Mount at flood stage?

No — the gage height is 5.14 feet below the NWS flood-stage threshold of 7.5 feet.

What is the historical median flow for the Prospect Creek at Thompson Falls Mount on June 11?

The long-term median discharge for this date is 463 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 185 to 1,190 cfs.

Where is the Prospect Creek at Thompson Falls Mount stream gauge located?

The Prospect Creek at Thompson Falls Mount stream gauge is operated by the USGS in Sanders County, MT on the Prospect Creek. USGS site number 12390700 (coordinates 47.5861, -115.3551).

Prospect Creek at Thompson Falls Mount

USGS Site No: 12390700 • Prospect Creek • Sanders County, MT

Prospect Creek at Thompson Falls Mount on the Prospect Creek is currently at 321 cfs (Normal — 30th percentile for this date) . Gage height: 2.36 ft.

Reading from 1 week ago

321

CFS Discharge

2.36

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	185
25th	Low threshold	288
50th (Median)	Normal (median)	463	Today: 321 cfs
75th	High threshold	724
95th	Very High threshold	1,190

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	320	—
May 27, 2026	324	—
May 26, 2026	293	—
May 25, 2026	282	—
May 24, 2026	278	—
May 23, 2026	279	—
May 22, 2026	287	—
May 21, 2026	300	—
May 20, 2026	317	—
May 19, 2026	340	—
May 18, 2026	369	—
May 17, 2026	406	—
May 16, 2026	445	—
May 15, 2026	481	—
Apr 20, 2026	406	—
Apr 19, 2026	426	—
Apr 18, 2026	453	—
Apr 17, 2026	485	—
Apr 16, 2026	530	—
Apr 15, 2026	554	—
Apr 14, 2026	552	—
Apr 13, 2026	536	—
Apr 12, 2026	466	—
Apr 11, 2026	433	—
Apr 10, 2026	424	—
Apr 9, 2026	426	—
Apr 8, 2026	416	—
Apr 7, 2026	392	—
Apr 6, 2026	381	—
Apr 5, 2026	390	—

Station Information

USGS Site No: 12390700
State: MT
County: Sanders County
Coordinates: 47.5861, -115.3551
Drainage Area: 182 mi²
Datum (ft): 2,382.4
HUC Code: 17010213

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 6.5 ft
Flood Stage: 7.5 ft
Moderate Flood: 8.0 ft
Major Flood: 9.0 ft

Currently 5.14 ft below flood stage.

Recent Extremes

Max discharge: 2,110 cfs

Dec 12, 2025
Min discharge: 28 cfs

Oct 9, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Thompson River Near Thompson Falls Mount
5.9 mi · 640 cfs

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

Very High
St. Regis River Near St. Regis, Mount
22.8 mi · 708 cfs

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

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

Normal