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 CaliforniaBulletin Group: San JoaquinRiver Group: North San Joaquin
Action/Monitor: 16.0 FeetMinor Flood: 22.0 FeetModerate Flood: 30.9 FeetMajor Flood: 31.9 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Army Corps of Engineers.
View US Army Corps of Engineers Data for this station location.

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
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.
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Partly cloudy in the morning then clearing. Highs 65 to 74. Northwest winds up to 10 mph. Gusts up to 25 mph in the afternoon.

Tonight: Clear. Lows 45 to 53. Northwest winds up to 15 mph. Gusts up to 25 mph in the evening.

Wednesday: Sunny, warmer. Highs 73 to 82. Northwest winds up to 10 mph. Gusts up to 20 mph in the afternoon.

Wednesday Night: Mostly clear. Lows 48 to 54. Northwest winds up to 15 mph.

Thursday: Sunny. Highs 79 to 87. Northwest winds up to 10 mph. Gusts up to 20 mph in the afternoon.

Thursday Night: Partly cloudy. Lows 53 to 59.

Friday: Partly cloudy. Highs 77 to 86.

Friday Night and Saturday: Partly cloudy. Lows 51 to 57. Highs 72 to 82.

Saturday Night and Sunday: Mostly clear. Lows 49 to 55. Highs 69 to 79.

Sunday Night and Monday: Clear. Lows 51 to 59. Highs 75 to 85.
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.