Columbia Slough at Portland, OR

USGS Site No: 14211820 • Columbia Slough • Multnomah County, OR

Columbia Slough at Portland, OR on the Columbia Slough is currently at -803 cfs (Very Low — 5736th percentile for this date) . Gage height: 5.89 ft.

Reading from

-803
CFS Discharge
5.89
Gage Height (ft)
Very Low
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 -1 Today: -803 cfs
25th Low threshold 15
50th (Median) Normal (median) 74
75th High threshold 122
95th Very High threshold 209

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.

1k 502 0 cfs Apr 2 May 26
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 26, 2026 122 —
May 25, 2026 92 —
May 24, 2026 167 —
May 23, 2026 167 —
May 22, 2026 100 —
May 21, 2026 124 —
May 20, 2026 138 —
May 19, 2026 154 —
May 18, 2026 102 —
May 17, 2026 132 —
May 16, 2026 73 —
May 15, 2026 29 —
Apr 19, 2026 101 —
Apr 18, 2026 30 —
Apr 17, 2026 95 —
Apr 16, 2026 143 —
Apr 15, 2026 173 —
Apr 14, 2026 94 —
Apr 13, 2026 112 —
Apr 12, 2026 83 —
Apr 11, 2026 176 —
Apr 10, 2026 106 —
Apr 9, 2026 180 —
Apr 8, 2026 188 —
Apr 7, 2026 158 —
Apr 6, 2026 126 —
Apr 5, 2026 130 —
Apr 4, 2026 141 —
Apr 3, 2026 206 —
Apr 2, 2026 172 —

Station Information

USGS Site No
14211820
State
OR
County
Multnomah County
Coordinates
45.6390, -122.7632
Datum (ft)
1.5
HUC Code
17090012
View on USGS NWIS →

Recent Extremes

Max discharge
423 cfs
Mar 17, 2026
Min discharge
-1,000 cfs
Dec 19, 2025

Computed from the local daily-values archive.

Nearby Gauges

Related