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

Observed Data Credit
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Raw streamflow data is provided by the California Department of Water Resources.
View CA DWR Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2019*
6,080
15.14
Mar 6, 2019
 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)
Today: Sunny in the afternoon. Highs 83 to 90. Northwest winds up to 10 mph with gusts to around 20 mph.

Tonight: Clear. Lows 51 to 59. Northwest winds up to 15 mph.

Thursday: Sunny. Highs 87 to 94. Northwest winds up to 10 mph.

Thursday Night: Clear in the evening. Lows 55 to 63. Northwest winds up to 10 mph.

Friday: Sunny. Highs 93 to 100. Northwest winds up to 10 mph.

Friday Night: Clear. Lows 62 to 72.

Saturday: Sunny, warmer. Highs 99 to 107.

Saturday Night: Clear. Lows 63 to 73.

Sunday: Sunny. Highs 96 to 106.

Sunday Night: Clear. Lows 59 to 69.

Monday: Sunny. Highs 94 to 102.

Monday Night: Clear. Lows 56 to 66.

Tuesday: Sunny. Highs 94 to 101.
Impacts - E19 Information
9.0 FeetWater rises out of the pilot channel but not yet on the levee slopes.
14.2 FeetUOP research within the Calaveras River channel is affected by water levels.
16.0 FeetBike trail within lower Calaveras River channel is flooded
22.0 FeetFlood Stage.
23.0 FeetDanger Stage.
31.9 FeetWater will overflow toward Bellota and Highway 26.
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.