Major Flood
58.3 ft
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
This is an NWS forecast point (LID: PATC1). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
57.3 ft
Minor Flood
54.7 ft
Action Stage
48 ft
What Floods at Each Level
58.3 ft
Stages above 58.3 feet result in flooding outside the levee. Top of levee.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Mar 27, 2023 | 52.24 ft | — |
| Feb 21, 2017 | 51.71 ft | 25,600 cfs |
| Mar 3, 1983 | 51.26 ft | 28,700 cfs |
About This Gauge
NWS LID
PATC1
River
San Joaquin River
County
Stanislaus, CA
Coordinates
37.4939°N, 121.0808°W
Get Flood Alerts for San Joaquin River
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 Joaquin River at Patterson?
The San Joaquin River at Patterson gauge is maintained by USGS 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 Joaquin River at Patterson?
The NWS-defined flood stage for San Joaquin River at Patterson is 54.7 feet. Action stage begins at 48 feet. Moderate flooding starts at 57.3 feet, and major flooding at 58.3 feet.
How do I get alerts when San Joaquin River rises?
Download StormCast free on Google Play, go to River Gauges, and add San Joaquin River at Patterson 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 Joaquin River at Patterson gauge located?
The gauge is located in Stanislaus County, California at coordinates 37.4939°N, 121.0808°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on San Joaquin River
On This River
More Resources
Source & Notes
Data provided by: Observations Courtesy of CA Department of Water Resources