San Gabriel River above Whittier Narrows Dam CA

USGS Site No: 11087020 • San Gabriel River • Los Angeles County, CA

San Gabriel River above Whittier Narrows Dam CA on the San Gabriel River is currently at 28 cfs (Normal — 51th percentile for this date) . Gage height: 4.02 ft.

Reading from

↑ Upstream on San Gabriel River
San Gabriel River below Santa Fe Dam near Baldwin Pk CA
28
CFS Discharge
4.02
Gage Height (ft)
Normal
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 6
50th (Median) Normal (median) 26
75th High threshold 81 Today: 28 cfs
95th Very High threshold 188

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.

953 476 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 28 —
May 27, 2026 22 —
May 26, 2026 24 —
May 25, 2026 18 —
May 24, 2026 20 —
May 23, 2026 21 —
May 22, 2026 21 —
May 21, 2026 20 —
May 20, 2026 22 —
May 19, 2026 20 —
May 18, 2026 20 —
May 17, 2026 24 —
May 16, 2026 25 —
May 15, 2026 24 —
Apr 20, 2026 11 —
Apr 19, 2026 9 —
Apr 18, 2026 10 —
Apr 17, 2026 9 —
Apr 16, 2026 10 —
Apr 15, 2026 11 —
Apr 14, 2026 13 —
Apr 13, 2026 26 —
Apr 12, 2026 167 —
Apr 11, 2026 36 —
Apr 10, 2026 30 —
Apr 9, 2026 27 —
Apr 8, 2026 29 —
Apr 7, 2026 30 —
Apr 6, 2026 30 —
Apr 5, 2026 30 —

Station Information

USGS Site No
11087020
State
CA
County
Los Angeles County
Coordinates
34.0342, -118.0381
Drainage Area
442 mi²
Datum (ft)
219.2
HUC Code
18070106
View on USGS NWIS →

Recent Extremes

Max discharge
5,790 cfs
Nov 16, 2025
Min discharge
0 cfs
Jul 24, 2025

Computed from the local daily-values archive.

Nearby Gauges

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