Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 
Hydrograph River at a Glance Download
San Joaquin River at Vernalis Stage (ft)Flow (kcfs)Highest Observation: 7.55 ft at 3:30PM Oct 13, 2021Highest Observation: 7.55 ft at 3:45PM Oct 13, 2021Highest Observation: 7.55 ft at 4:00PM Oct 13, 2021Observed: 7.54 ft at 4:15PM Oct 13, 2021Observed: 7.54 ft at 4:30PM Oct 13, 2021Observed: 7.54 ft at 4:45PM Oct 13, 2021Observed: 7.53 ft at 5:00PM Oct 13, 2021Observed: 7.53 ft at 5:15PM Oct 13, 2021Observed: 7.53 ft at 5:30PM Oct 13, 2021Observed: 7.52 ft at 5:45PM Oct 13, 2021Observed: 7.52 ft at 6:00PM Oct 13, 2021Observed: 7.51 ft at 6:15PM Oct 13, 2021Observed: 7.51 ft at 6:30PM Oct 13, 2021Observed: 7.51 ft at 6:45PM Oct 13, 2021Observed: 7.51 ft at 7:00PM Oct 13, 2021Observed: 7.51 ft at 7:15PM Oct 13, 2021Observed: 7.5 ft at 7:30PM Oct 13, 2021Observed: 7.51 ft at 7:45PM Oct 13, 2021Observed: 7.5 ft at 8:00PM Oct 13, 2021Observed: 7.5 ft at 8:15PM Oct 13, 2021Observed: 7.5 ft at 8:30PM Oct 13, 2021Observed: 7.49 ft at 8:45PM Oct 13, 2021Observed: 7.5 ft at 9:00PM Oct 13, 2021Observed: 7.49 ft at 9:15PM Oct 13, 2021Observed: 7.49 ft at 9:30PM Oct 13, 2021Observed: 7.49 ft at 9:45PM Oct 13, 2021Observed: 7.49 ft at 10:00PM Oct 13, 2021Observed: 7.49 ft at 10:15PM Oct 13, 2021Observed: 7.49 ft at 10:30PM Oct 13, 2021Observed: 7.48 ft at 10:45PM Oct 13, 2021Observed: 7.48 ft at 11:00PM Oct 13, 2021Observed: 7.48 ft at 11:15PM Oct 13, 2021Observed: 7.48 ft at 11:30PM Oct 13, 2021Observed: 7.48 ft at 11:45PM Oct 13, 2021Observed: 7.48 ft at 12:00AM Oct 14, 2021Observed: 7.48 ft at 12:15AM Oct 14, 2021Observed: 7.47 ft at 12:30AM Oct 14, 2021Observed: 7.47 ft at 12:45AM Oct 14, 2021Observed: 7.47 ft at 1:00AM Oct 14, 2021Observed: 7.47 ft at 1:15AM Oct 14, 2021Observed: 7.47 ft at 1:30AM Oct 14, 2021Observed: 7.47 ft at 1:45AM Oct 14, 2021Observed: 7.47 ft at 2:00AM Oct 14, 2021Observed: 7.47 ft at 2:15AM Oct 14, 2021Observed: 7.47 ft at 2:30AM Oct 14, 2021Observed: 7.47 ft at 2:45AM Oct 14, 2021Observed: 7.47 ft at 3:00AM Oct 14, 2021Observed: 7.47 ft at 3:15AM Oct 14, 2021Observed: 7.47 ft at 3:30AM Oct 14, 2021Observed: 7.47 ft at 3:45AM Oct 14, 2021Observed: 7.47 ft at 4:00AM Oct 14, 2021Observed: 7.47 ft at 4:15AM Oct 14, 2021Observed: 7.47 ft at 4:30AM Oct 14, 2021Observed: 7.47 ft at 4:45AM Oct 14, 2021Observed: 7.47 ft at 5:00AM Oct 14, 2021Observed: 7.47 ft at 5:15AM Oct 14, 2021Observed: 7.47 ft at 5:30AM Oct 14, 2021Observed: 7.47 ft at 5:45AM Oct 14, 2021Observed: 7.47 ft at 6:00AM Oct 14, 2021Observed: 7.47 ft at 6:15AM Oct 14, 2021Observed: 7.47 ft at 6:30AM Oct 14, 2021Observed: 7.47 ft at 6:45AM Oct 14, 2021Observed: 7.47 ft at 7:00AM Oct 14, 2021Observed: 7.47 ft at 7:15AM Oct 14, 2021Observed: 7.47 ft at 7:30AM Oct 14, 2021Observed: 7.47 ft at 7:45AM Oct 14, 2021Observed: 7.47 ft at 8:00AM Oct 14, 2021Observed: 7.47 ft at 8:15AM Oct 14, 2021Observed: 7.47 ft at 8:30AM Oct 14, 2021Observed: 7.47 ft at 8:45AM Oct 14, 2021Observed: 7.47 ft at 9:00AM Oct 14, 2021Observed: 7.46 ft at 9:15AM Oct 14, 2021Observed: 7.46 ft at 9:30AM Oct 14, 2021Observed: 7.46 ft at 9:45AM Oct 14, 2021Observed: 7.45 ft at 10:00AM Oct 14, 2021Observed: 7.45 ft at 10:15AM Oct 14, 2021Observed: 7.44 ft at 10:30AM Oct 14, 2021Observed: 7.45 ft at 10:45AM Oct 14, 2021Observed: 7.44 ft at 11:00AM Oct 14, 2021Observed: 7.44 ft at 11:15AM Oct 14, 2021Observed: 7.44 ft at 11:30AM Oct 14, 2021Observed: 7.43 ft at 11:45AM Oct 14, 2021Observed: 7.43 ft at 12:00PM Oct 14, 2021Observed: 7.43 ft at 12:15PM Oct 14, 2021Observed: 7.42 ft at 12:30PM Oct 14, 2021Observed: 7.42 ft at 12:45PM Oct 14, 2021Observed: 7.42 ft at 1:00PM Oct 14, 2021Observed: 7.41 ft at 1:15PM Oct 14, 2021Observed: 7.42 ft at 1:30PM Oct 14, 2021Observed: 7.41 ft at 1:45PM Oct 14, 2021Observed: 7.41 ft at 2:00PM Oct 14, 2021Observed: 7.41 ft at 2:15PM Oct 14, 2021Observed: 7.4 ft at 2:30PM Oct 14, 2021Observed: 7.41 ft at 2:45PM Oct 14, 2021Observed: 7.4 ft at 3:00PM Oct 14, 2021Observed: 7.4 ft at 3:15PM Oct 14, 2021Observed: 7.4 ft at 3:30PM Oct 14, 2021Observed: 7.39 ft at 3:45PM Oct 14, 2021Observed: 7.39 ft at 4:00PM Oct 14, 2021Observed: 7.39 ft at 4:15PM Oct 14, 2021Observed: 7.38 ft at 4:30PM Oct 14, 2021Observed: 7.38 ft at 4:45PM Oct 14, 2021Observed: 7.38 ft at 5:00PM Oct 14, 2021Observed: 7.38 ft at 5:15PM Oct 14, 2021Observed: 7.38 ft at 5:30PM Oct 14, 2021Observed: 7.37 ft at 5:45PM Oct 14, 2021Observed: 7.37 ft at 6:00PM Oct 14, 2021Observed: 7.37 ft at 6:15PM Oct 14, 2021Observed: 7.37 ft at 6:30PM Oct 14, 2021Observed: 7.37 ft at 6:45PM Oct 14, 2021Observed: 7.37 ft at 7:00PM Oct 14, 2021Observed: 7.37 ft at 7:15PM Oct 14, 2021Observed: 7.37 ft at 7:30PM Oct 14, 2021Observed: 7.37 ft at 7:45PM Oct 14, 2021Observed: 7.37 ft at 8:00PM Oct 14, 2021Observed: 7.37 ft at 8:15PM Oct 14, 2021Observed: 7.37 ft at 8:30PM Oct 14, 2021Observed: 7.37 ft at 8:45PM Oct 14, 2021Observed: 7.37 ft at 9:00PM Oct 14, 2021Observed: 7.37 ft at 9:15PM Oct 14, 2021Observed: 7.36 ft at 9:30PM Oct 14, 2021Observed: 7.36 ft at 9:45PM Oct 14, 2021Observed: 7.36 ft at 10:00PM Oct 14, 2021Observed: 7.36 ft at 10:15PM Oct 14, 2021Observed: 7.36 ft at 10:30PM Oct 14, 2021Observed: 7.36 ft at 10:45PM Oct 14, 2021Observed: 7.36 ft at 11:00PM Oct 14, 2021Observed: 7.36 ft at 11:15PM Oct 14, 2021Observed: 7.36 ft at 11:30PM Oct 14, 2021Observed: 7.36 ft at 11:45PM Oct 14, 2021Observed: 7.36 ft at 12:00AM Oct 15, 2021Observed: 7.36 ft at 12:15AM Oct 15, 2021Observed: 7.36 ft at 12:30AM Oct 15, 2021Observed: 7.36 ft at 12:45AM Oct 15, 2021Observed: 7.36 ft at 1:00AM Oct 15, 2021Observed: 7.36 ft at 1:15AM Oct 15, 2021Observed: 7.36 ft at 1:30AM Oct 15, 2021Observed: 7.36 ft at 1:45AM Oct 15, 2021Observed: 7.36 ft at 2:00AM Oct 15, 2021Observed: 7.36 ft at 2:15AM Oct 15, 2021Observed: 7.36 ft at 2:30AM Oct 15, 2021Observed: 7.36 ft at 2:45AM Oct 15, 2021Observed: 7.37 ft at 3:00AM Oct 15, 2021Observed: 7.37 ft at 3:15AM Oct 15, 2021Observed: 7.37 ft at 3:30AM Oct 15, 2021Observed: 7.37 ft at 3:45AM Oct 15, 2021Observed: 7.37 ft at 4:00AM Oct 15, 2021Observed: 7.37 ft at 4:15AM Oct 15, 2021Observed: 7.37 ft at 4:30AM Oct 15, 2021Observed: 7.38 ft at 4:45AM Oct 15, 2021Observed: 7.38 ft at 5:00AM Oct 15, 2021Observed: 7.38 ft at 5:15AM Oct 15, 2021Observed: 7.38 ft at 5:30AM Oct 15, 2021Observed: 7.38 ft at 5:45AM Oct 15, 2021Observed: 7.39 ft at 6:00AM Oct 15, 2021Observed: 7.39 ft at 6:15AM Oct 15, 2021Observed: 7.39 ft at 6:30AM Oct 15, 2021Observed: 7.39 ft at 6:45AM Oct 15, 2021Observed: 7.39 ft at 7:00AM Oct 15, 2021Observed: 7.39 ft at 7:15AM Oct 15, 2021Observed: 7.4 ft at 7:30AM Oct 15, 2021Observed: 7.4 ft at 7:45AM Oct 15, 2021Observed: 7.4 ft at 8:00AM Oct 15, 2021Observed: 7.4 ft at 8:15AM Oct 15, 2021Observed: 7.4 ft at 8:30AM Oct 15, 2021Observed: 7.4 ft at 8:45AM Oct 15, 2021Observed: 7.4 ft at 9:00AM Oct 15, 2021Observed: 7.4 ft at 9:15AM Oct 15, 2021Observed: 7.4 ft at 9:30AM Oct 15, 2021Observed: 7.4 ft at 9:45AM Oct 15, 2021Observed: 7.4 ft at 10:00AM Oct 15, 2021Observed: 7.4 ft at 10:15AM Oct 15, 2021Observed: 7.4 ft at 10:30AM Oct 15, 2021Observed: 7.4 ft at 10:45AM Oct 15, 2021Observed: 7.4 ft at 11:00AM Oct 15, 2021Observed: 7.39 ft at 11:15AM Oct 15, 2021Observed: 7.39 ft at 11:30AM Oct 15, 2021Observed: 7.39 ft at 11:45AM Oct 15, 2021Observed: 7.39 ft at 12:00PM Oct 15, 2021Observed: 7.39 ft at 12:15PM Oct 15, 2021Observed: 7.39 ft at 12:30PM Oct 15, 2021Observed: 7.39 ft at 12:45PM Oct 15, 2021Observed: 7.39 ft at 1:00PM Oct 15, 2021Observed: 7.39 ft at 1:15PM Oct 15, 2021Observed: 7.39 ft at 1:30PM Oct 15, 2021Observed: 7.38 ft at 1:45PM Oct 15, 2021Observed: 7.38 ft at 2:00PM Oct 15, 2021Observed: 7.38 ft at 2:15PM Oct 15, 2021Observed: 7.38 ft at 2:30PM Oct 15, 2021Observed: 7.38 ft at 2:45PM Oct 15, 2021Observed: 7.38 ft at 3:00PM Oct 15, 2021Observed: 7.38 ft at 3:15PM Oct 15, 2021Observed: 7.37 ft at 3:30PM Oct 15, 2021Observed: 7.37 ft at 3:45PM Oct 15, 2021Observed: 7.37 ft at 4:00PM Oct 15, 2021Observed: 7.37 ft at 4:15PM Oct 15, 2021Observed: 7.37 ft at 4:30PM Oct 15, 2021Observed: 7.37 ft at 4:45PM Oct 15, 2021Observed: 7.37 ft at 5:00PM Oct 15, 2021Observed: 7.37 ft at 5:15PM Oct 15, 2021Observed: 7.37 ft at 5:30PM Oct 15, 2021Observed: 7.37 ft at 5:45PM Oct 15, 2021Observed: 7.37 ft at 6:00PM Oct 15, 2021Observed: 7.37 ft at 6:15PM Oct 15, 2021Observed: 7.37 ft at 6:30PM Oct 15, 2021Observed: 7.37 ft at 6:45PM Oct 15, 2021Observed: 7.37 ft at 7:00PM Oct 15, 2021Observed: 7.37 ft at 7:15PM Oct 15, 2021Observed: 7.37 ft at 7:30PM Oct 15, 2021Observed: 7.37 ft at 7:45PM Oct 15, 2021Observed: 7.37 ft at 8:00PM Oct 15, 2021Observed: 7.37 ft at 8:15PM Oct 15, 2021Observed: 7.38 ft at 8:30PM Oct 15, 2021Observed: 7.38 ft at 8:45PM Oct 15, 2021Observed: 7.38 ft at 9:00PM Oct 15, 2021Observed: 7.38 ft at 9:15PM Oct 15, 2021Observed: 7.38 ft at 9:30PM Oct 15, 2021Observed: 7.38 ft at 9:45PM Oct 15, 2021Observed: 7.36 ft at 10:00PM Oct 15, 2021Observed: 7.36 ft at 10:15PM Oct 15, 2021Observed: 7.36 ft at 10:30PM Oct 15, 2021Observed: 7.36 ft at 10:45PM Oct 15, 2021Observed: 7.36 ft at 11:00PM Oct 15, 2021Observed: 7.36 ft at 11:15PM Oct 15, 2021Observed: 7.36 ft at 11:30PM Oct 15, 2021Observed: 7.36 ft at 11:45PM Oct 15, 2021Observed: 7.36 ft at 12:00AM Oct 16, 2021Observed: 7.36 ft at 12:15AM Oct 16, 2021Observed: 7.36 ft at 12:30AM Oct 16, 2021Observed: 7.36 ft at 12:45AM Oct 16, 2021Observed: 7.36 ft at 1:00AM Oct 16, 2021Observed: 7.37 ft at 1:15AM Oct 16, 2021Observed: 7.37 ft at 1:30AM Oct 16, 2021Observed: 7.37 ft at 1:45AM Oct 16, 2021Observed: 7.37 ft at 2:00AM Oct 16, 2021Observed: 7.37 ft at 2:15AM Oct 16, 2021Observed: 7.37 ft at 2:30AM Oct 16, 2021Observed: 7.38 ft at 2:45AM Oct 16, 2021Observed: 7.38 ft at 3:00AM Oct 16, 2021Observed: 7.38 ft at 3:15AM Oct 16, 2021Observed: 7.38 ft at 3:30AM Oct 16, 2021Observed: 7.38 ft at 3:45AM Oct 16, 2021Observed: 7.39 ft at 4:00AM Oct 16, 2021Observed: 7.39 ft at 4:15AM Oct 16, 2021Observed: 7.39 ft at 4:30AM Oct 16, 2021Observed: 7.39 ft at 4:45AM Oct 16, 2021Observed: 7.39 ft at 5:00AM Oct 16, 2021Observed: 7.4 ft at 5:15AM Oct 16, 2021Observed: 7.4 ft at 5:30AM Oct 16, 2021Observed: 7.4 ft at 5:45AM Oct 16, 2021Observed: 7.4 ft at 6:00AM Oct 16, 2021Observed: 7.4 ft at 6:15AM Oct 16, 2021Observed: 7.4 ft at 6:30AM Oct 16, 2021Observed: 7.41 ft at 6:45AM Oct 16, 2021Observed: 7.41 ft at 7:00AM Oct 16, 2021Observed: 7.41 ft at 7:15AM Oct 16, 2021Observed: 7.42 ft at 7:30AM Oct 16, 2021Observed: 7.41 ft at 7:45AM Oct 16, 2021Observed: 7.42 ft at 8:00AM Oct 16, 2021Observed: 7.42 ft at 8:15AM Oct 16, 2021Observed: 7.42 ft at 8:30AM Oct 16, 2021Observed: 7.43 ft at 8:45AM Oct 16, 2021Observed: 7.43 ft at 9:00AM Oct 16, 2021Observed: 7.43 ft at 9:15AM Oct 16, 2021Observed: 7.43 ft at 9:30AM Oct 16, 2021Observed: 7.43 ft at 9:45AM Oct 16, 2021Observed: 7.43 ft at 10:00AM Oct 16, 2021Observed: 7.43 ft at 10:15AM Oct 16, 2021Observed: 7.44 ft at 10:30AM Oct 16, 2021Observed: 7.44 ft at 10:45AM Oct 16, 2021Observed: 7.44 ft at 11:00AM Oct 16, 2021Observed: 7.44 ft at 11:15AM Oct 16, 2021Observed: 7.44 ft at 11:30AM Oct 16, 2021Observed: 7.44 ft at 11:45AM Oct 16, 2021Observed: 7.44 ft at 12:00PM Oct 16, 2021Observed: 7.44 ft at 12:15PM Oct 16, 2021Observed: 7.44 ft at 12:30PM Oct 16, 2021Observed: 7.44 ft at 12:45PM Oct 16, 2021Observed: 7.44 ft at 1:00PM Oct 16, 2021Observed: 7.44 ft at 1:15PM Oct 16, 2021Observed: 7.44 ft at 1:30PM Oct 16, 2021Observed: 7.44 ft at 1:45PM Oct 16, 2021Observed: 7.44 ft at 2:00PM Oct 16, 2021Observed: 7.44 ft at 2:15PM Oct 16, 2021Observed: 7.44 ft at 2:30PM Oct 16, 2021Observed: 7.44 ft at 2:45PM Oct 16, 2021Forecast: 7.4 ft 4:00PM Oct 16, 2021Forecast: 7.4 ft 5:00PM Oct 16, 2021Forecast: 7.4 ft 6:00PM Oct 16, 2021Forecast: 7.4 ft 7:00PM Oct 16, 2021Forecast: 7.4 ft 8:00PM Oct 16, 2021Forecast: 7.4 ft 9:00PM Oct 16, 2021Forecast: 7.4 ft 10:00PM Oct 16, 2021Forecast: 7.4 ft 11:00PM Oct 16, 2021Forecast: 7.4 ft 12:00AM Oct 17, 2021Forecast: 7.4 ft 1:00AM Oct 17, 2021Forecast: 7.4 ft 2:00AM Oct 17, 2021Forecast: 7.4 ft 3:00AM Oct 17, 2021Forecast: 7.4 ft 4:00AM Oct 17, 2021Forecast: 7.4 ft 5:00AM Oct 17, 2021Forecast: 7.4 ft 6:00AM Oct 17, 2021Forecast: 7.4 ft 7:00AM Oct 17, 2021Forecast: 7.4 ft 8:00AM Oct 17, 2021Forecast: 7.4 ft 9:00AM Oct 17, 2021Forecast: 7.4 ft 10:00AM Oct 17, 2021Forecast: 7.4 ft 11:00AM Oct 17, 2021Forecast: 7.4 ft 12:00PM Oct 17, 2021Forecast: 7.4 ft 1:00PM Oct 17, 2021Forecast: 7.4 ft 2:00PM Oct 17, 2021Forecast: 7.4 ft 3:00PM Oct 17, 2021Forecast: 7.4 ft 4:00PM Oct 17, 2021Forecast: 7.5 ft 5:00PM Oct 17, 2021Forecast: 7.5 ft 6:00PM Oct 17, 2021Forecast: 7.5 ft 7:00PM Oct 17, 2021Forecast: 7.5 ft 8:00PM Oct 17, 2021Forecast: 7.5 ft 9:00PM Oct 17, 2021Forecast: 7.5 ft 10:00PM Oct 17, 2021Forecast: 7.5 ft 11:00PM Oct 17, 2021Forecast: 7.5 ft 12:00AM Oct 18, 2021Forecast: 7.6 ft 1:00AM Oct 18, 2021Forecast: 7.6 ft 2:00AM Oct 18, 2021Forecast: 7.6 ft 3:00AM Oct 18, 2021Forecast: 7.6 ft 4:00AM Oct 18, 2021Forecast: 7.6 ft 5:00AM Oct 18, 2021Forecast: 7.7 ft 6:00AM Oct 18, 2021Forecast: 7.7 ft 7:00AM Oct 18, 2021Forecast: 7.7 ft 8:00AM Oct 18, 2021Forecast: 7.7 ft 9:00AM Oct 18, 2021Forecast: 7.8 ft 10:00AM Oct 18, 2021Forecast: 7.8 ft 11:00AM Oct 18, 2021Forecast: 7.8 ft 12:00PM Oct 18, 2021Forecast: 7.8 ft 1:00PM Oct 18, 2021Forecast: 7.9 ft 2:00PM Oct 18, 2021Forecast: 7.9 ft 3:00PM Oct 18, 2021Forecast: 7.9 ft 4:00PM Oct 18, 2021Forecast: 7.9 ft 5:00PM Oct 18, 2021Forecast: 8 ft 6:00PM Oct 18, 2021Forecast: 8 ft 7:00PM Oct 18, 2021Forecast: 8 ft 8:00PM Oct 18, 2021Forecast: 8 ft 9:00PM Oct 18, 2021Forecast: 8.1 ft 10:00PM Oct 18, 2021Forecast: 8.1 ft 11:00PM Oct 18, 2021Forecast: 8.1 ft 12:00AM Oct 19, 2021Forecast: 8.1 ft 1:00AM Oct 19, 2021Forecast: 8.1 ft 2:00AM Oct 19, 2021Forecast: 8.2 ft 3:00AM Oct 19, 2021Forecast: 8.2 ft 4:00AM Oct 19, 2021Forecast: 8.2 ft 5:00AM Oct 19, 2021Forecast: 8.2 ft 6:00AM Oct 19, 2021Forecast: 8.2 ft 7:00AM Oct 19, 2021Forecast: 8.3 ft 8:00AM Oct 19, 2021Forecast: 8.3 ft 9:00AM Oct 19, 2021Forecast: 8.3 ft 10:00AM Oct 19, 2021Forecast: 8.3 ft 11:00AM Oct 19, 2021Forecast: 8.3 ft 12:00PM Oct 19, 2021Forecast: 8.3 ft 1:00PM Oct 19, 2021Forecast: 8.4 ft 2:00PM Oct 19, 2021Forecast: 8.4 ft 3:00PM Oct 19, 2021Forecast: 8.4 ft 4:00PM Oct 19, 2021Forecast: 8.4 ft 5:00PM Oct 19, 2021Forecast: 8.4 ft 6:00PM Oct 19, 2021Forecast: 8.4 ft 7:00PM Oct 19, 2021Forecast: 8.4 ft 8:00PM Oct 19, 2021Forecast: 8.4 ft 9:00PM Oct 19, 2021Forecast: 8.4 ft 10:00PM Oct 19, 2021Forecast: 8.5 ft 11:00PM Oct 19, 2021Forecast: 8.5 ft 12:00AM Oct 20, 2021Forecast: 8.5 ft 1:00AM Oct 20, 2021Forecast: 8.5 ft 2:00AM Oct 20, 2021Forecast: 8.5 ft 3:00AM Oct 20, 2021Forecast: 8.5 ft 4:00AM Oct 20, 2021Forecast: 8.5 ft 5:00AM Oct 20, 2021Forecast: 8.5 ft 6:00AM Oct 20, 2021Forecast: 8.5 ft 7:00AM Oct 20, 2021Forecast: 8.5 ft 8:00AM Oct 20, 2021Forecast: 8.5 ft 9:00AM Oct 20, 2021Forecast: 8.5 ft 10:00AM Oct 20, 2021Forecast: 8.5 ft 11:00AM Oct 20, 2021Forecast: 8.5 ft 12:00PM Oct 20, 2021Forecast: 8.5 ft 1:00PM Oct 20, 2021Forecast: 8.5 ft 2:00PM Oct 20, 2021Forecast: 8.5 ft 3:00PM Oct 20, 2021Forecast: 8.5 ft 4:00PM Oct 20, 2021Highest Forecast: 8.6 ft 5:00PM Oct 20, 2021Highest Forecast: 8.6 ft 6:00PM Oct 20, 2021Highest Forecast: 8.6 ft 7:00PM Oct 20, 2021Highest Forecast: 8.6 ft 8:00PM Oct 20, 2021Highest Forecast: 8.6 ft 9:00PM Oct 20, 2021Highest Forecast: 8.6 ft 10:00PM Oct 20, 2021Highest Forecast: 8.6 ft 11:00PM Oct 20, 2021Highest Forecast: 8.6 ft 12:00AM Oct 21, 2021Highest Forecast: 8.6 ft 1:00AM Oct 21, 2021Highest Forecast: 8.6 ft 2:00AM Oct 21, 2021Highest Forecast: 8.6 ft 3:00AM Oct 21, 2021Highest Forecast: 8.6 ft 4:00AM Oct 21, 2021Highest Forecast: 8.6 ft 5:00AM Oct 21, 2021USGS--Water Resources of the United StatesVNSC1(plotting HGIRG) Graph Created (3:23PM Oct 16, 2021)ObservedForecast (issued 8:19AM Oct 16)Latest observed value: 7.44 ft at 2:45 PM PDT 16-Oct-2021. Flood Stage is 29 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the San Joaquin River at Vernalis are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Patterson Upstream Gauge Downstream Gauge Downstream Gauge - at Mossdale Bridge
Flood Categories (in feet)
Major Flood Stage: 37.3
Moderate Flood Stage: 32
Flood Stage: 29
Action Stage: 24.5
Low Stage (in feet): 0

Historic Crests
(1) 34.88 ft on 01/05/1997
(2) 34.55 ft on 01/27/1969
(3) 32.81 ft on 12/09/1950
(4) 32.71 ft on 03/16/1938
(5) 32.11 ft on 02/12/1938
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 21.69 ft on 03/04/2019
(2) 17.83 ft on 04/08/2018
(3) 30.72 ft on 02/23/2017
(4) 14.21 ft on 03/15/2016
(5) 9.66 ft on 04/26/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
37.29 Stages above 37.3 feet results in flooding outside the levees. Top of levee.
26 Severe seepage occurs outside the levees. The area covered by seepage will increase as the river stage rises.
21 Seepage begins into crop area outside of levees.
About This Location Collapse

Latitude: 37.676041° N, Longitude: 121.266329° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 29 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 25.0 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Sacramento Weather Forecast Office

Sacramento, CA
(916) 979-3051
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:27 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities