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 10, 2025 at 8:14 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 88 to 96. Northwest winds up to 10 mph with gusts to around 20 mph.

Tonight: Clear. Lows 52 to 62. Northwest winds up to 15 mph.

Wednesday: Sunny. Highs 84 to 92. Northwest winds up to 15 mph. Gusts up to 25 mph in the afternoon.

Wednesday Night: Clear. Lows 51 to 59. Northwest winds up to 15 mph. Gusts up to 25 mph in the evening.

Thursday: Sunny. Highs 86 to 94. Northwest winds up to 10 mph with gusts to around 20 mph.

Thursday Night: Clear. Lows 54 to 60.

Friday: Sunny. Highs 83 to 91.

Friday Night: Clear. Lows 52 to 58.

Saturday through Sunday Night: Mostly clear. Highs 83 to 93. Lows 52 to 61.

Monday: Sunny. Highs 85 to 92.