Twelvemile C near Petersburg AK

USGS Site No: 15087585 • Petersburg Census Area, AK

Twelvemile C near Petersburg AK is currently at 0 cfs (Unknown) . Gage height: 22.92 ft.

Reading from

0
CFS Discharge
22.92
Gage Height (ft)
Unknown
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 0
25th Low threshold 52
50th (Median) Normal (median) 69
75th High threshold 140
95th Very High threshold 0

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.

287 144 0 cfs Feb 17 Mar 18
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
Mar 18, 2026 19 —
Mar 17, 2026 30 —
Mar 16, 2026 45 —
Mar 15, 2026 16 —
Mar 14, 2026 10 —
Mar 13, 2026 16 —
Mar 12, 2026 27 —
Mar 11, 2026 17 —
Mar 10, 2026 21 —
Mar 9, 2026 29 —
Mar 8, 2026 57 —
Mar 7, 2026 144 —
Mar 6, 2026 266 —
Mar 5, 2026 121 —
Mar 4, 2026 241 —
Mar 3, 2026 41 —
Mar 2, 2026 28 —
Mar 1, 2026 20 —
Feb 28, 2026 16 —
Feb 27, 2026 16 —
Feb 26, 2026 18 —
Feb 25, 2026 20 —
Feb 24, 2026 18 —
Feb 23, 2026 15 —
Feb 22, 2026 15 —
Feb 21, 2026 21 —
Feb 20, 2026 27 —
Feb 19, 2026 56 —
Feb 18, 2026 91 —
Feb 17, 2026 52 —

Station Information

USGS Site No
15087585
State
AK
County
Petersburg Census Area
Coordinates
56.9686, -133.0681
Drainage Area
10 mi²
Datum (ft)
-6.8
HUC Code
190102100103
View on USGS NWIS →

Recent Extremes

Max discharge
739 cfs
May 28, 2025
Min discharge
2 cfs
Sep 9, 2025

Computed from the local daily-values archive.

Nearby Gauges

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