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
Issuance Time: Sep 29 2020 at 8:48 AM PDTNext Issuance: Sep 30 2020 at 9:00 AM PDT
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.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
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)
Tonight: Mostly clear. Haze and patchy smoke. Lows 59 to 69. North winds up to 10 mph.

Wednesday: Mostly sunny. Patchy smoke in the morning. Haze through the day. Areas of smoke in the afternoon. Highs 92 to 98. Northwest winds up to 15 mph.

Wednesday Night: Mostly clear. Haze and areas of smoke. Lows 62 to 72. Northwest winds up to 15 mph.

Thursday: Mostly sunny. Haze and patchy smoke. Highs 91 to 97. Northwest winds up to 15 mph.

Thursday Night: Mostly clear. Haze and patchy smoke. Lows 62 to 72. Northwest winds up to 15 mph.

Friday: Mostly sunny. Haze and patchy smoke. Highs 91 to 97.

Friday Night: Mostly clear. Cooler. Lows 57 to 67.

Saturday through Sunday: Mostly clear. Highs 85 to 93. Lows 56 to 66.

Sunday Night: Partly cloudy. Lows 54 to 64.

Monday through Tuesday: Mostly clear. Highs 83 to 90. Lows 54 to 64.
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.