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

 | 

SAN JOAQUIN RIVER - VERNALIS (VNSC1)
Latitude: 37.68º NLongitude: 121.27º WElevation: 35 Feet
Location: San Joaquin County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Sep 26 2023 at 8:14 AM PDTNext Issuance: Sep 27 2023 at 9:00 AM PDT
Monitor Stage: 24.5 FeetFlood Stage: 29.0 FeetDanger Stage: 29.5 Feet

Observed Data Credit
Gage owner logo

Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Verification - Historical Graphical RVF
Month:  
Day:  
Year:  
Cycle:  
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
2022*
2,600
10.83
Dec 29, 2021/div>
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
 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
Impacts - E19 Information
21.0 FeetSeepage begins into crop area outside of levees.
24.5 FeetMonitor Stage. Water reaches the toe of levee.
26.0 FeetSevere seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
29.6 FeetHomes along east bank of river on Airport Court in Manteca experience flooding.
37.3 FeetStages above 37.3 Feet results in flooding outside the levees. Top of levee.
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 77 to 85. Northwest winds 10 to 15 mph.

Tonight: Clear. Lows 50 to 58. Northwest winds up to 15 mph with gusts to around 25 mph.

Thursday: Sunny. Highs 77 to 85. Northwest winds 10 to 15 mph.

Thursday Night: Clear. Lows 52 to 60. Northwest winds up to 15 mph.

Friday: Mostly sunny. Highs 74 to 82. West winds up to 15 mph.

Friday Night: Partly cloudy. Lows 53 to 59.

Saturday: Mostly cloudy with a slight chance of rain showers. Highs 64 to 72.

Saturday Night through Monday Night: Mostly clear. Lows 50 to 59. Highs 67 to 77.

Tuesday: Sunny. Highs 75 to 83.
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.