CNRFC - Hydrology - Observed River/Reservoir Conditions

SAN JOAQUIN RIVER - VERNALIS (VNSC1)

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

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
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
2017*	41,000	30.73	Feb 23, 2017
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

Official 7 Day National Weather Service Forecast (CAZ019)

Today: Sunny in the morning then becoming partly cloudy. Highs 82 to 92. Northwest winds 10 to 15 mph. Gusts up to 25 mph in the afternoon.

Tonight: Mostly cloudy in the evening then clearing. Lows 53 to 59. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Friday: Mostly cloudy in the morning then becoming partly cloudy. Highs 81 to 89. Northwest winds up to 15 mph. Gusts up to 25 mph in the afternoon.

Friday Night: Mostly clear. Lows 53 to 59. West winds 10 to 20 mph.

Saturday: Partly cloudy. Highs 73 to 81. West winds 10 to 15 mph with gusts to around 25 mph.

Saturday Night: Mostly clear. Lows 49 to 55.

Sunday: Sunny. Highs 71 to 79.

Sunday Night through Monday Night: Clear. Lows 46 to 56. Highs 72 to 82.

Tuesday and Tuesday Night: Clear. Highs 82 to 92. Lows 50 to 60.

Wednesday: Sunny. Highs 88 to 96.

Impacts - E19 Information
21.0 Feet	Seepage begins into crop area outside of levee.
26.0 Feet	Severe seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
37.3 Feet	Stages above 37.3 Feet results in flooding outside the levees. Top of levee.

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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