CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MORMON SLOUGH - BELLOTA (MSGC1)

Latitude: 38.05º N	Longitude: 121.01º W	Elevation: 130 Feet
Location: San Joaquin County in California		Bulletin Group: San Joaquin		River Group: North San Joaquin

Issuance Time:

Apr 29 2025 at 8:37 AM PDT

Next Issuance:

Apr 30 2025 at 9:00 AM PDT

Action/Monitor: 16.0 Feet

Minor Flood: 22.0 Feet

Moderate Flood: 30.9 Feet

Major Flood: 31.9 Feet

Plot Type:

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.

Observed Data Credit
	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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
31.9 Feet	Top of Levee right bank levee. Water will overflow toward Bellota and Highway 26.
23.0 Feet	Danger Stage
22.0 Feet	Flood Stage
16.0 Feet	Monitor Stage - Bike trail within lower Calaveras River channel flooded.
14.2 Feet	UOP research within the Calaveras River channel is affected by water levels.
9.0 Feet	Water rises out of the pilot channel but not yet on the levee slopes.

Official 7 Day National Weather Service Forecast (CAZ019)

Tonight: Mostly clear in the evening then becoming mostly cloudy. Lows 51 to 59. Northwest winds up to 10 mph.

Wednesday: Mostly cloudy in the morning then clearing. Highs 77 to 85. Northwest winds up to 10 mph.

Wednesday Night: Clear. Lows 52 to 58. Northwest winds up to 10 mph.

Thursday: Sunny. Highs 77 to 85. Northwest winds up to 10 mph.

Thursday Night: Clear. Lows 50 to 56. Northwest winds up to 10 mph.

Friday: Sunny. Highs 74 to 83.

Friday Night: Mostly cloudy. Lows 49 to 56.

Saturday: Mostly cloudy with a slight chance of rain showers. Highs 59 to 69.

Saturday Night and Sunday: Partly cloudy with a slight chance of rain showers. Lows 44 to 52. Highs 60 to 70.

Sunday Night through Monday Night: Mostly clear. Lows 46 to 55. Highs 63 to 73.

Tuesday: Sunny, warmer. Highs 71 to 81.

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.

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