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 16, 2025 at 6:21 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.
Threshold Exceedance Plot                  Product Information        CSV Ensemble Files (Data in kcfs):  Forecast Group  |  MSGC1

Show:





What information is considered in this forecast?
Verification / Historical Plots
<-- Previous Forecast  Forecast Date:   Forecast Cycle:  

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 up to 15 mph. Gusts up to 25 mph in the afternoon.

Tonight: Clear. Lows 50 to 58. Northwest winds up to 15 mph with gusts to around 25 mph.

Tuesday: Sunny. Highs 87 to 94. Northwest winds up to 10 mph with gusts to around 20 mph.

Tuesday Night: Clear. Lows 55 to 63. Northwest winds up to 15 mph.

Wednesday: Sunny. Highs 92 to 100. Northwest winds up to 10 mph. Gusts up to 20 mph in the afternoon.

Wednesday Night: Clear. Lows 55 to 63.

juneteenth: Sunny. Highs 86 to 94.

Thursday Night through Friday Night: Clear. Lows 50 to 57. Highs 83 to 93.

Saturday and Saturday Night: Clear. Highs 76 to 84. Lows 50 to 60.

Sunday: Sunny. Highs 82 to 90.