San Lorenzo C at Hayward CA

USGS Site No: 11181000 • Alameda County, CA

San Lorenzo C at Hayward CA is currently at 3 cfs (Normal — 58th percentile for this date) . Gage height: 2.80 ft.

Reading from

3
CFS Discharge
2.80
Gage Height (ft)
Normal
Flow Condition
Normal
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 1
50th (Median) Normal (median) 2
75th High threshold 4 Today: 3 cfs
95th Very High threshold 9

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.

144 72 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 6 —
May 27, 2026 3 —
May 26, 2026 3 —
May 25, 2026 3 —
May 24, 2026 3 —
May 23, 2026 3 —
May 22, 2026 2 —
May 21, 2026 2 —
May 20, 2026 3 —
May 19, 2026 3 —
May 18, 2026 3 —
May 17, 2026 3 —
May 16, 2026 3 —
May 15, 2026 3 —
Apr 20, 2026 22 —
Apr 19, 2026 5 —
Apr 18, 2026 5 —
Apr 17, 2026 5 —
Apr 16, 2026 6 —
Apr 15, 2026 7 —
Apr 14, 2026 9 —
Apr 13, 2026 18 —
Apr 12, 2026 41 —
Apr 11, 2026 49 —
Apr 10, 2026 18 —
Apr 9, 2026 3 —
Apr 8, 2026 3 —
Apr 7, 2026 4 —
Apr 6, 2026 4 —
Apr 5, 2026 4 —

Station Information

USGS Site No
11181000
State
CA
County
Alameda County
Coordinates
37.6855, -122.0644
Drainage Area
38 mi²
Datum (ft)
135.9
HUC Code
18050004
View on USGS NWIS →

Flood Stage Thresholds

Action Stage
20.9 ft
Flood Stage
24.6 ft
Moderate Flood
29.6 ft
Major Flood
33.0 ft

Currently 21.84 ft below flood stage.

Recent Extremes

Max discharge
211 cfs
Jan 4, 2026
Min discharge
0 cfs
Sep 23, 2025
Days at flood stage
0

Computed from the local daily-values archive.

Nearby Gauges

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