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:

Nov 29 2023 at 7:26 AM PST

Next Issuance:

Nov 29 2023 at 3:00 PM PST

Monitor Stage: 24.5 Feet

Flood Stage: 29.0 Feet

Danger Stage: 29.5 Feet

Plot Type:

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above.

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: Partly cloudy with a chance of rain showers early in the morning, then partly cloudy with a slight chance of rain showers late in the morning. Mostly sunny in the afternoon. Highs 55 to 62. Light winds becoming northwest around 10 mph in the afternoon.

Tonight: Mostly clear. Lows 36 to 46. Northwest winds up to 10 mph.

Thursday: Mostly cloudy in the morning, then partly cloudy with a slight chance of rain showers in the afternoon. Highs 55 to 63. Southeast winds up to 10 mph shifting to the west around 10 mph in the afternoon. Gusts up to 20 mph.

Thursday Night: Mostly cloudy with a chance of rain showers in the evening, then partly cloudy with a slight chance of rain showers after midnight. Lows 36 to 44. West winds 10 to 15 mph with gusts to around 25 mph.

Friday: Partly cloudy in the morning then clearing. Highs 52 to 60. Northwest winds up to 15 mph.

Friday Night: Partly cloudy with a slight chance of rain showers. Lows 37 to 45.

Saturday: Mostly cloudy with a slight chance of rain showers. Highs 55 to 61.

Saturday Night through Monday: Mostly cloudy. Lows 40 to 48. Highs 56 to 63.

Monday Night and Tuesday: Partly cloudy. Lows 40 to 48. Highs 59 to 65.

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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