CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SAN JOAQUIN RIVER - VERNALIS (VNSC1)

Latitude: 37.68º N	Longitude: 121.27º W	Elevation: 35 Feet
Location: San Joaquin County in California		Bulletin Group: San Joaquin		River Group: San Joaquin

Issuance Time:

Sep 26 2023 at 8:14 AM PDT

Next Issuance:

Sep 27 2023 at 9:00 AM PDT

Monitor Stage: 24.5 Feet

Flood Stage: 29.0 Feet

Danger Stage: 29.5 Feet

Plot Type:

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2022*	2,600	10.83	Dec 29, 2021/div>
2021*	2,470	10.76	Jan 31, 2021
2020*	6,130	14.29	Dec 9, 2019
2019*	17,200	21.82	Mar 13, 2019
2018*	11,000	17.83	Apr 8, 2018
Historical High Stage/Flow Events (Period of Record - Jul 1922 to Present) - Ranked by Flow
1951*	79,000	27.75	Dec 09, 1950
1997*	75,600	34.88	Jan 05, 1997
1969*	52,600	34.55	Jan 27, 1969
1938*	51,200	26.64	Mar 16, 1938
1956*	50,900	26.89	Dec 25, 1955
1983*	45,100	31.49	Mar 07, 1983
* Discharge affected by regulation or diversion

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Impacts - E19 Information
21.0 Feet	Seepage begins into crop area outside of levees.
24.5 Feet	Monitor Stage. Water reaches the toe of levee.
26.0 Feet	Severe seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
29.6 Feet	Homes along east bank of river on Airport Court in Manteca experience flooding.
37.3 Feet	Stages above 37.3 Feet results in flooding outside the levees. Top of levee.

Official 7 Day National Weather Service Forecast (CAZ019)

Today: Sunny. Highs 77 to 85. Northwest winds 10 to 15 mph.

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

Thursday: Sunny. Highs 77 to 85. Northwest winds 10 to 15 mph.

Thursday Night: Clear. Lows 52 to 60. Northwest winds up to 15 mph.

Friday: Mostly sunny. Highs 74 to 82. West winds up to 15 mph.

Friday Night: Partly cloudy. Lows 53 to 59.

Saturday: Mostly cloudy with a slight chance of rain showers. Highs 64 to 72.

Saturday Night through Monday Night: Mostly clear. Lows 50 to 59. Highs 67 to 77.

Tuesday: Sunny. Highs 75 to 83.

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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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.