Major Flood
33 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
29.64 ft
Minor Flood
24.64 ft
Action Stage
20.85 ft
What Floods at Each Level
33 ft
Major Flooding. Homes and local roadways inundated with several feet of water.
29.64 ft
Moderate Flooding. Homes and roadways adjacent to the creek in this location begin to flood.
24.64 ft
Minor Flooding. At 24.64 feet, flooding may have begun downstream at the San Lorenzo Creek near San Lorenzo stream gage. NWS will issue Flash Flood Warning if not already issued.
20.85 ft
Monitor stage. At 20.85 feet the San Lorenzo Creek near San Lorenzo gage downstream is close to flooding. NWS will issue a Flash Flood Watch if not already issued.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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About This Gauge
USGS Site
NWS LID
LRZC1
River
San Lorenzo Creek (Alameda)
County
Alameda, CA
Coordinates
37.6855°N, 122.0644°W
Get Flood Alerts for San Lorenzo Creek (Alameda)
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of San Lorenzo Creek (Alameda) above Hayward?
The San Lorenzo Creek (Alameda) above Hayward gauge is maintained by USGS (site 11181000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for San Lorenzo Creek (Alameda) above Hayward?
The NWS-defined flood stage for San Lorenzo Creek (Alameda) above Hayward is 24.64 feet. Action stage begins at 20.85 feet. Moderate flooding starts at 29.64 feet, and major flooding at 33 feet.
How do I get alerts when San Lorenzo Creek (Alameda) rises?
Download StormCast free on Google Play, go to River Gauges, and add San Lorenzo Creek (Alameda) above Hayward to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the San Lorenzo Creek (Alameda) above Hayward gauge located?
The gauge is located in Alameda County, California at coordinates 37.6855°N, 122.0644°W. USGS site number: 11181000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on San Lorenzo Creek (Alameda)
On This River
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey