West Branch Oswegatchie River Near Harrisville NY

USGS Site No: 04262500 • West Branch Oswegatchie River • St. Lawrence County, NY

West Branch Oswegatchie River Near Harrisville NY on the West Branch Oswegatchie River is currently at 455 cfs (High — 76th percentile for this date) . Gage height: 2.94 ft.

Reading from

455
CFS Discharge
2.94
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 141
25th Low threshold 190
50th (Median) Normal (median) 290
75th High threshold 415
95th Very High threshold 970 Today: 455 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.

4k 2k 0 cfs Apr 6 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 592 —
May 27, 2026 726 —
May 26, 2026 750 —
May 25, 2026 561 —
May 24, 2026 376 —
May 23, 2026 342 —
May 22, 2026 407 —
May 21, 2026 469 —
May 20, 2026 518 —
May 19, 2026 577 —
May 18, 2026 661 —
May 17, 2026 755 —
May 16, 2026 794 —
May 15, 2026 729 —
Apr 21, 2026 1,780 —
Apr 20, 2026 2,200 —
Apr 19, 2026 1,970 —
Apr 18, 2026 2,140 —
Apr 17, 2026 2,150 —
Apr 16, 2026 2,110 —
Apr 15, 2026 1,480 —
Apr 14, 2026 870 —
Apr 13, 2026 799 —
Apr 12, 2026 805 —
Apr 11, 2026 818 —
Apr 10, 2026 918 —
Apr 9, 2026 1,120 —
Apr 8, 2026 1,410 —
Apr 7, 2026 1,820 —
Apr 6, 2026 1,910 —

Station Information

USGS Site No
04262500
State
NY
County
St. Lawrence County
Coordinates
44.1857, -75.3304
Drainage Area
258 mi²
Datum (ft)
738.0
HUC Code
042900030504
View on USGS NWIS →

Recent Extremes

Max discharge
4,510 cfs
Mar 13, 2026
Min discharge
40 cfs
Sep 22, 2025

Computed from the local daily-values archive.

Nearby Gauges

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