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

*** IMPORTANT ***  Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.


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
Issuance Time: Jun 11, 2025 at 7:52 AM PDT
Action/Monitor: 16.0 FeetMinor Flood: 22.0 FeetModerate Flood: 30.9 FeetMajor Flood: 31.9 Feet
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.
Short-Range Peak Exceedance Plot   Product Info.   CSV Ensemble Files (Data in kcfs): Forecast Group | MSGC1
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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: Sunny. Highs 83 to 91. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Tonight: Clear. Lows 49 to 57. Northwest winds up to 15 mph.

Thursday: Sunny. Highs 85 to 93. Northwest winds up to 10 mph with gusts to around 20 mph.

Thursday Night: Clear. Lows 53 to 61. Northwest winds up to 15 mph.

Friday: Sunny. Highs 83 to 91. West winds up to 10 mph with gusts to around 20 mph.

Friday Night: Clear. Lows 51 to 57.

Saturday: Mostly sunny. Highs 83 to 91.

Saturday Night and Sunday: Mostly clear. Lows 52 to 60. Highs 84 to 94.

Sunday Night: Partly cloudy. Lows 53 to 59.

Monday through Tuesday: Clear. Highs 85 to 95. Lows 53 to 59.