St. Mary River Near Babb Mount

USGS Site No: 05017500 • St. Mary River • Glacier County, MT

St. Mary River Near Babb Mount on the St. Mary River is currently at 2,760 cfs (Very High — 116th percentile for this date) . Gage height: 4.80 ft.

Reading from

2,760
CFS Discharge
4.80
Gage Height (ft)
Very High
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 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 80
25th Low threshold 119
50th (Median) Normal (median) 191
75th High threshold 361
95th Very High threshold 888

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.

4.8k 2.4k 0 cfs Apr 5 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 2,090 —
May 27, 2026 1,740 —
May 26, 2026 1,420 —
May 25, 2026 1,230 —
May 24, 2026 1,170 —
May 23, 2026 1,170 —
May 22, 2026 1,190 —
May 21, 2026 1,310 —
May 20, 2026 1,510 —
May 19, 2026 1,780 —
May 18, 2026 2,060 —
May 17, 2026 2,270 —
May 16, 2026 2,420 —
May 15, 2026 2,470 —
Apr 20, 2026 1,030 —
Apr 19, 2026 1,050 —
Apr 18, 2026 1,040 —
Apr 17, 2026 991 —
Apr 16, 2026 920 —
Apr 15, 2026 909 —
Apr 14, 2026 882 —
Apr 13, 2026 836 —
Apr 12, 2026 782 —
Apr 11, 2026 690 —
Apr 10, 2026 588 —
Apr 9, 2026 537 —
Apr 8, 2026 560 —
Apr 7, 2026 624 —
Apr 6, 2026 651 —
Apr 5, 2026 722 —

Station Information

USGS Site No
05017500
State
MT
County
Glacier County
Coordinates
48.8330, -113.4207
Drainage Area
275 mi²
Datum (ft)
4,468.1
HUC Code
09040001
View on USGS NWIS →

Recent Extremes

Max discharge
2,560 cfs
Jun 2, 2025
Min discharge
70 cfs
Oct 28, 2025

Computed from the local daily-values archive.

Nearby Gauges

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