Arroyo Seco near Pasadena CA

USGS Site No: 11098000 • Los Angeles County, CA

Arroyo Seco near Pasadena CA is currently at 7 cfs (High — 80th percentile for this date) . Gage height: 1.24 ft.

Reading from

7
CFS Discharge
1.24
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 1
25th Low threshold 1
50th (Median) Normal (median) 2
75th High threshold 5
95th Very High threshold 12 Today: 7 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.

83 42 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 7 —
May 27, 2026 7 —
May 26, 2026 7 —
May 25, 2026 11 —
May 24, 2026 14 —
May 23, 2026 9 —
May 22, 2026 6 —
May 21, 2026 6 —
May 20, 2026 6 —
May 19, 2026 6 —
May 18, 2026 6 —
May 17, 2026 6 —
May 16, 2026 6 —
May 15, 2026 6 —
Apr 20, 2026 7 —
Apr 19, 2026 7 —
Apr 18, 2026 7 —
Apr 17, 2026 7 —
Apr 16, 2026 7 —
Apr 15, 2026 8 —
Apr 14, 2026 9 —
Apr 13, 2026 9 —
Apr 12, 2026 12 —
Apr 11, 2026 7 —
Apr 10, 2026 7 —
Apr 9, 2026 7 —
Apr 8, 2026 7 —
Apr 7, 2026 7 —
Apr 6, 2026 7 —
Apr 5, 2026 7 —

Station Information

USGS Site No
11098000
State
CA
County
Los Angeles County
Coordinates
34.2222, -118.1776
Drainage Area
16 mi²
Datum (ft)
1,400.4
HUC Code
180701050209
View on USGS NWIS →

Recent Extremes

Max discharge
373 cfs
Dec 24, 2025
Min discharge
0 cfs
Oct 13, 2025

Computed from the local daily-values archive.

Nearby Gauges

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