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SAN JOAQUIN RIVER - VERNALIS (VNSC1)
Latitude:
37.68º N
Longitude:
121.27º W
Elevation:
35 Feet
Location: San Joaquin County in CA
River Group: San Joaquin
Issuance Time: Jun 22 2025 at 8:53 AM PDT
Action/
Monitor:
24.5 Ft
Minor
Flood:
29.0 Ft
Moderate
Flood:
32.0 Ft
Major
Flood:
37.3 Ft
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.
Threshold Exceedance Plot                  Product Information        CSV Ensemble Files (Data in kcfs):  Forecast Group  |  VNSC1
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What information is considered in this forecast?
Verification / Historical Plots
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Location Photographs

ESRI™ Locator Map
Flood Impacts
37.29 FeetStages above 37.3 feet results in flooding outside the levees. Top of levee.
29.6 FeetHomes along east bank of river on Airport Court in Manteca experience flooding.
26.0 FeetSevere seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
24.5 FeetMonitor Stage - water reaches the toe of levee.
21.0 FeetSeepage begins into crop area outside of levees.
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 85 to 93. West winds up to 10 mph with gusts to around 20 mph.

Tonight: Clear. Lows 55 to 63. Northwest winds up to 10 mph with gusts to around 20 mph.

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

Tuesday Night: Clear. Lows 53 to 61. Northwest winds up to 15 mph.

Wednesday: Sunny. Highs 88 to 96. Northwest winds up to 10 mph.

Wednesday Night: Clear. Lows 56 to 64.

Thursday: Sunny. Highs 90 to 96.

Thursday Night through Sunday: Clear. Lows 58 to 68. Highs 90 to 100.

Flood Impacts
37.29 FeetStages above 37.3 feet results in flooding outside the levees. Top of levee.
29.6 FeetHomes along east bank of river on Airport Court in Manteca experience flooding.
26.0 FeetSevere seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
24.5 FeetMonitor Stage - water reaches the toe of levee.
21.0 FeetSeepage begins into crop area outside of levees.