National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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SAN JOAQUIN RIVER - VERNALIS (VNSC1)
Latitude: 37.68º NLongitude: 121.27º WElevation: 35 Feet
Location: San Joaquin County in CaliforniaRiver Group: San Joaquin
Monitor Stage: 24.5 FeetFlood Stage: 29.0 FeetDanger Stage: 29.5 Feet

Observed Data Credit
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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
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
2015*
1,850
9.66
Dec 18, 2014
 Historical High Stage/Flow Events (Period of Record - Jul 1922 to Present)
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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 93 to 100. Northwest winds up to 15 mph.

Tonight: Clear. Lows 53 to 63. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Monday: Sunny. Highs 88 to 96. Northwest winds up to 15 mph.

Monday Night: Clear. Lows 51 to 59. Northwest winds 10 to 20 mph.

Tuesday: Sunny. Highs 85 to 93. Northwest winds up to 10 mph.

Tuesday Night: Clear. Lows 53 to 61.

Wednesday: Sunny. Highs 86 to 95.

Wednesday Night through Thursday Night: Clear. Lows 56 to 66. Highs 87 to 97.

Friday: Mostly sunny. Highs 92 to 98.

Friday Night and Saturday: Clear. Lows 57 to 67. Highs 92 to 102.
Impacts - E19 Information
21.0 FeetSeepage begins into crop area outside of levee.
26.0 FeetSevere seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
37.3 FeetStages 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.