How high is the Flathead River at Perma Mount right now?

The Flathead River at Perma Mount is currently flowing at 37,000 cubic feet per second with a gage height of 17.18 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Flathead River at Perma Mount normal for this time of year?

Current flow is classified as high for June 11. Today's discharge is at the 77th percentile compared to the long-term historical record at this gauge.

What is the historical median flow for the Flathead River at Perma Mount on June 11?

The long-term median discharge for this date is 25,700 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 13,100 to 50,700 cfs.

Where is the Flathead River at Perma Mount stream gauge located?

The Flathead River at Perma Mount stream gauge is operated by the USGS in Sanders County, MT on the Flathead River. USGS site number 12388700 (coordinates 47.3668, -114.5850).

Flathead River at Perma Mount

USGS Site No: 12388700 • Flathead River • Sanders County, MT

Flathead River at Perma Mount on the Flathead River is currently at 37,000 cfs (High — 77th percentile for this date) . Gage height: 17.18 ft.

Reading from 1 week ago

↑ Upstream on Flathead River

Flathead River Near Polson Mount

37,000

CFS Discharge

17.18

Gage Height (ft)

High

Flow Condition

N/A

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	13,100
25th	Low threshold	16,700
50th (Median)	Normal (median)	25,700
75th	High threshold	35,300
95th	Very High threshold	50,700	Today: 37,000 cfs

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	31,300	—
May 27, 2026	26,600	—
May 26, 2026	26,000	—
May 25, 2026	25,100	—
May 24, 2026	25,200	—
May 23, 2026	25,400	—
May 22, 2026	25,600	—
May 21, 2026	26,100	—
May 20, 2026	28,300	—
May 19, 2026	31,000	—
May 18, 2026	31,200	—
May 17, 2026	31,500	—
May 16, 2026	31,900	—
May 15, 2026	32,300	—
Apr 20, 2026	15,300	—
Apr 19, 2026	15,400	—
Apr 18, 2026	15,400	—
Apr 17, 2026	15,700	—
Apr 16, 2026	15,800	—
Apr 15, 2026	15,700	—
Apr 14, 2026	15,700	—
Apr 13, 2026	15,700	—
Apr 12, 2026	15,600	—
Apr 11, 2026	15,500	—
Apr 10, 2026	15,400	—
Apr 9, 2026	15,400	—
Apr 8, 2026	15,200	—
Apr 7, 2026	15,200	—
Apr 6, 2026	15,100	—
Apr 5, 2026	15,200	—

Station Information

USGS Site No: 12388700
State: MT
County: Sanders County
Coordinates: 47.3668, -114.5850
Drainage Area: 9,024 mi²
Datum (ft): 2,469.3
HUC Code: 17010212

View on USGS NWIS →

Recent Extremes

Max discharge: 32,300 cfs

May 15, 2026
Min discharge: 4,320 cfs

Nov 13, 2025

Computed from the local daily-values archive.

Nearby Gauges

Clark Fork Near Plains Mount
13.4 mi · 59,600 cfs

Normal
Clark Fork at St. Regis Mount
23.9 mi · 22,300 cfs

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

Low
Flathead River Near Polson Mount
26.8 mi · 39,400 cfs

High
Mission Creek above Reservoir near St. Ignatius Mount
28.1 mi · 319 cfs

High