Major Flood
31.9 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: MSGC1). 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
30.9 ft
Minor Flood
22 ft
Action Stage
16 ft
What Floods at Each Level
31.9 ft
Top of Levee right bank levee. Water will overflow toward Bellota and Highway 26.
23 ft
Danger Stage
22 ft
Flood Stage
16 ft
Monitor Stage - Bike trail within lower Calaveras River channel flooded.
14.2 ft
UOP research within the Calaveras River channel is affected by water levels.
9 ft
Water rises out of the pilot channel but not yet on the levee slopes.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jan 16, 2023 | 21.8 ft | — |
| Feb 3, 1998 | 18.48 ft | 9,395 cfs |
| Apr 4, 2006 | 18.4 ft | 9,328 cfs |
About This Gauge
NWS LID
MSGC1
River
Mormon Slough
County
San Joaquin, CA
Coordinates
38.0500°N, 121.0142°W
Get Flood Alerts for Mormon Slough
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 Mormon Slough at Bellota?
The Mormon Slough at Bellota 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 Mormon Slough at Bellota?
The NWS-defined flood stage for Mormon Slough at Bellota is 22 feet. Action stage begins at 16 feet. Moderate flooding starts at 30.9 feet, and major flooding at 31.9 feet.
How do I get alerts when Mormon Slough rises?
Download StormCast free on Google Play, go to River Gauges, and add Mormon Slough at Bellota 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 Mormon Slough at Bellota gauge located?
The gauge is located in San Joaquin County, California at coordinates 38.0500°N, 121.0142°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: USACE