Thunder Bay River at Herron Road Near Bolton, MI

USGS Site No: 04133501 • Thunder Bay River • Alpena County, MI

Thunder Bay River at Herron Road Near Bolton, MI on the Thunder Bay River is currently at 645 cfs (High — 80th percentile for this date) . Gage height: 12.59 ft.

Reading from

645
CFS Discharge
12.59
Gage Height (ft)
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 270
25th Low threshold 322
50th (Median) Normal (median) 404
75th High threshold 531
95th Very High threshold 1,020 Today: 645 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.

5.7k 2.8k 0 cfs Apr 7 May 29
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 29, 2026 677 —
May 28, 2026 749 —
May 27, 2026 827 —
May 26, 2026 809 —
May 25, 2026 874 —
May 24, 2026 959 —
May 23, 2026 1,190 —
May 22, 2026 1,490 —
May 21, 2026 1,850 —
May 20, 2026 1,980 —
May 19, 2026 1,470 —
May 18, 2026 860 —
May 17, 2026 620 —
May 16, 2026 666 —
May 15, 2026 656 —
Apr 21, 2026 2,030 —
Apr 20, 2026 2,350 —
Apr 19, 2026 2,760 —
Apr 18, 2026 3,170 —
Apr 17, 2026 3,770 —
Apr 16, 2026 4,660 —
Apr 15, 2026 5,260 —
Apr 14, 2026 4,890 —
Apr 13, 2026 3,290 —
Apr 12, 2026 2,080 —
Apr 11, 2026 1,870 —
Apr 10, 2026 2,150 —
Apr 9, 2026 2,400 —
Apr 8, 2026 2,780 —
Apr 7, 2026 3,220 —

Station Information

USGS Site No
04133501
State
MI
County
Alpena County
Coordinates
45.1242, -83.6355
Drainage Area
586 mi²
Datum (ft)
659.9
HUC Code
04070006
View on USGS NWIS →

Recent Extremes

Max discharge
5,260 cfs
Apr 15, 2026
Min discharge
211 cfs
Jul 16, 2025

Computed from the local daily-values archive.

Nearby Gauges

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