San Lorenzo C at San Lorenzo CA

USGS Site No: 11181040 • Alameda County, CA

San Lorenzo C at San Lorenzo CA is currently at 2 cfs (Normal — 34th percentile for this date) . Gage height: 3.34 ft. This station is at or above flood stage.

Reading from

2
CFS Discharge
3.34
Gage Height (ft)
Normal
Flow Condition
FLOOD
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) 4 Today: 2 cfs
75th High threshold 6
95th Very High threshold 15

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.

363 181 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 4 —
May 27, 2026 3 —
May 26, 2026 4 —
May 25, 2026 4 —
May 24, 2026 3 —
May 23, 2026 3 —
May 22, 2026 4 —
May 21, 2026 4 —
May 20, 2026 4 —
May 19, 2026 4 —
May 18, 2026 4 —
May 17, 2026 4 —
May 16, 2026 4 —
May 15, 2026 4 —
Apr 20, 2026 52 —
Apr 19, 2026 8 —
Apr 18, 2026 7 —
Apr 17, 2026 7 —
Apr 16, 2026 7 —
Apr 15, 2026 7 —
Apr 14, 2026 8 —
Apr 13, 2026 9 —
Apr 12, 2026 22 —
Apr 11, 2026 53 —
Apr 10, 2026 25 —
Apr 9, 2026 10 —
Apr 8, 2026 10 —
Apr 7, 2026 10 —
Apr 6, 2026 9 —
Apr 5, 2026 9 —

Station Information

USGS Site No
11181040
State
CA
County
Alameda County
Coordinates
37.6841, -122.1400
Drainage Area
45 mi²
Datum (ft)
8.5
HUC Code
18050004
View on USGS NWIS →

Flood Stage Thresholds

Action Stage
12.0 ft
Moderate Flood
25.5 ft

Recent Extremes

Max discharge
215 cfs
Feb 17, 2026
Min discharge
1 cfs
Sep 23, 2025

Computed from the local daily-values archive.

Nearby Gauges

Related