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

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
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
2016*	5,800	14.21	Mar 15, 2016
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: Partly cloudy in the morning then clearing. Breezy. Highs 70 to 80. Northwest winds 10 to 25 mph.

Tonight: Mostly clear. Lows 45 to 55. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Wednesday: Mostly sunny. Highs 76 to 84. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Wednesday Night: Mostly clear. Lows 48 to 58. Northwest winds up to 15 mph.

Thursday: Sunny. Highs 82 to 88. Light winds becoming northwest around 10 mph in the afternoon.

Thursday Night: Mostly clear. Lows 52 to 62.

Friday: Sunny. Highs 86 to 92.

Friday Night: Mostly clear. Lows 54 to 64.

Saturday: Sunny. Highs 85 to 90.

Saturday Night: Mostly clear. Lows 54 to 64.

Sunday: Sunny. Highs 84 to 90.

Sunday Night and Monday: Mostly clear. Lows 53 to 63. Highs 82 to 90.

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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