National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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MORMON SLOUGH - BELLOTA (MSGC1)
Latitude: 38.05º NLongitude: 121.01º WElevation: 130 Feet
Location: San Joaquin County in CaliforniaRiver Group: San Joaquin
Monitor Stage: 16.0 FeetFlood Stage: 22.0 FeetDanger Stage: 23.0 Feet

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2024*
1,100
7.44
Mar 3, 2024
2023*
11,400
21.80
Jan 16, 2023
2022*
1,950
9.21
Oct 25, 2021
2021*
839
6.78
Jan 28, 2021
2020*
308
5.17
Mar 17, 2020
 Historical High Stage/Flow Events (Period of Record - Dec 1997 to Present) - Ranked by Flow
2023*
11,400
21.80
Jan 16, 2023
1998*
9,395
18.48
Feb 3, 1998
2006*
9,328
18.40
Apr 4, 2006
 * Discharge affected by regulation or diversion
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Clear. Haze early in the evening. Haze late in the night. Lows 61 to 71. Northwest winds up to 10 mph with gusts to around 20 mph.

Friday: Sunny. Highs 97 to 105. Northwest winds up to 10 mph.

Friday Night: Clear. Lows 62 to 72. Northwest winds up to 10 mph.

Saturday: Sunny. Highs 95 to 103. Northwest winds up to 10 mph.

Saturday Night: Clear. Lows 60 to 70. Northwest winds 10 to 15 mph.

Sunday: Sunny. Highs 94 to 102.

Sunday Night: Clear. Lows 60 to 70.

Monday through Tuesday Night: Clear. Highs 92 to 102. Lows 58 to 68.

Wednesday through Thursday: Clear. Highs 87 to 96. Lows 55 to 64.
Flood Impacts
31.9 FeetTop of Levee right bank levee. Water will overflow toward Bellota and Highway 26.
23.0 FeetDanger Stage
22.0 FeetFlood Stage
16.0 FeetMonitor Stage - Bike trail within lower Calaveras River channel flooded.
14.2 FeetUOP research within the Calaveras River channel is affected by water levels.
9.0 FeetWater rises out of the pilot channel but not yet on the levee slopes.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Sacramento Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.