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
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
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 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.