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Hydrograph River at a Glance Download
San Joaquin River at Vernalis Stage (ft)Flow (kcfs)Highest Observation: 17.31 ft at 7:45AM Feb 01, 2023Highest Observation: 17.31 ft at 8:00AM Feb 01, 2023Observed: 17.27 ft at 8:15AM Feb 01, 2023Observed: 17.29 ft at 8:30AM Feb 01, 2023Observed: 17.28 ft at 8:45AM Feb 01, 2023Observed: 17.27 ft at 9:00AM Feb 01, 2023Observed: 17.25 ft at 9:15AM Feb 01, 2023Observed: 17.28 ft at 9:30AM Feb 01, 2023Observed: 17.26 ft at 9:45AM Feb 01, 2023Observed: 17.21 ft at 10:00AM Feb 01, 2023Observed: 17.25 ft at 10:15AM Feb 01, 2023Observed: 17.23 ft at 10:30AM Feb 01, 2023Observed: 17.23 ft at 10:45AM Feb 01, 2023Observed: 17.23 ft at 11:00AM Feb 01, 2023Observed: 17.21 ft at 11:15AM Feb 01, 2023Observed: 17.21 ft at 11:30AM Feb 01, 2023Observed: 17.2 ft at 11:45AM Feb 01, 2023Observed: 17.22 ft at 12:00PM Feb 01, 2023Observed: 17.2 ft at 12:15PM Feb 01, 2023Observed: 17.2 ft at 12:30PM Feb 01, 2023Observed: 17.21 ft at 12:45PM Feb 01, 2023Observed: 17.19 ft at 1:00PM Feb 01, 2023Observed: 17.17 ft at 1:15PM Feb 01, 2023Observed: 17.18 ft at 1:30PM Feb 01, 2023Observed: 17.17 ft at 1:45PM Feb 01, 2023Observed: 17.17 ft at 2:00PM Feb 01, 2023Observed: 17.17 ft at 2:15PM Feb 01, 2023Observed: 17.17 ft at 2:30PM Feb 01, 2023Observed: 17.13 ft at 2:45PM Feb 01, 2023Observed: 17.15 ft at 3:00PM Feb 01, 2023Observed: 17.14 ft at 3:15PM Feb 01, 2023Observed: 17.14 ft at 3:30PM Feb 01, 2023Observed: 17.13 ft at 3:45PM Feb 01, 2023Observed: 17.12 ft at 4:00PM Feb 01, 2023Observed: 17.12 ft at 4:15PM Feb 01, 2023Observed: 17.12 ft at 4:30PM Feb 01, 2023Observed: 17.1 ft at 4:45PM Feb 01, 2023Observed: 17.11 ft at 5:00PM Feb 01, 2023Observed: 17.09 ft at 5:15PM Feb 01, 2023Observed: 17.1 ft at 5:30PM Feb 01, 2023Observed: 17.1 ft at 5:45PM Feb 01, 2023Observed: 17.06 ft at 6:00PM Feb 01, 2023Observed: 17.06 ft at 6:15PM Feb 01, 2023Observed: 17.05 ft at 6:30PM Feb 01, 2023Observed: 17.07 ft at 6:45PM Feb 01, 2023Observed: 17.06 ft at 7:00PM Feb 01, 2023Observed: 17.05 ft at 7:15PM Feb 01, 2023Observed: 17.04 ft at 7:30PM Feb 01, 2023Observed: 17.04 ft at 7:45PM Feb 01, 2023Observed: 17.04 ft at 8:00PM Feb 01, 2023Observed: 17.04 ft at 8:15PM Feb 01, 2023Observed: 17.02 ft at 8:30PM Feb 01, 2023Observed: 17.02 ft at 8:45PM Feb 01, 2023Observed: 17.02 ft at 9:00PM Feb 01, 2023Observed: 17.02 ft at 9:15PM Feb 01, 2023Observed: 17.02 ft at 9:30PM Feb 01, 2023Observed: 17 ft at 9:45PM Feb 01, 2023Observed: 16.98 ft at 10:00PM Feb 01, 2023Observed: 16.97 ft at 10:15PM Feb 01, 2023Observed: 16.99 ft at 10:30PM Feb 01, 2023Observed: 16.97 ft at 10:45PM Feb 01, 2023Observed: 16.96 ft at 11:00PM Feb 01, 2023Observed: 16.98 ft at 11:15PM Feb 01, 2023Observed: 16.95 ft at 11:30PM Feb 01, 2023Observed: 16.97 ft at 11:45PM Feb 01, 2023Observed: 16.96 ft at 12:00AM Feb 02, 2023Observed: 16.95 ft at 12:15AM Feb 02, 2023Observed: 16.94 ft at 12:30AM Feb 02, 2023Observed: 16.94 ft at 12:45AM Feb 02, 2023Observed: 16.93 ft at 1:00AM Feb 02, 2023Observed: 16.93 ft at 1:15AM Feb 02, 2023Observed: 16.93 ft at 1:30AM Feb 02, 2023Observed: 16.92 ft at 1:45AM Feb 02, 2023Observed: 16.91 ft at 2:00AM Feb 02, 2023Observed: 16.92 ft at 2:15AM Feb 02, 2023Observed: 16.92 ft at 2:30AM Feb 02, 2023Observed: 16.9 ft at 2:45AM Feb 02, 2023Observed: 16.9 ft at 3:00AM Feb 02, 2023Observed: 16.87 ft at 3:15AM Feb 02, 2023Observed: 16.89 ft at 3:30AM Feb 02, 2023Observed: 16.88 ft at 3:45AM Feb 02, 2023Observed: 16.87 ft at 4:00AM Feb 02, 2023Observed: 16.87 ft at 4:15AM Feb 02, 2023Observed: 16.86 ft at 4:30AM Feb 02, 2023Observed: 16.86 ft at 4:45AM Feb 02, 2023Observed: 16.85 ft at 5:00AM Feb 02, 2023Observed: 16.85 ft at 5:15AM Feb 02, 2023Observed: 16.83 ft at 5:30AM Feb 02, 2023Observed: 16.84 ft at 5:45AM Feb 02, 2023Observed: 16.83 ft at 6:00AM Feb 02, 2023Observed: 16.84 ft at 6:15AM Feb 02, 2023Observed: 16.84 ft at 6:30AM Feb 02, 2023Observed: 16.82 ft at 6:45AM Feb 02, 2023Observed: 16.82 ft at 7:00AM Feb 02, 2023Observed: 16.8 ft at 7:15AM Feb 02, 2023Observed: 16.8 ft at 7:30AM Feb 02, 2023Observed: 16.79 ft at 7:45AM Feb 02, 2023Observed: 16.8 ft at 8:00AM Feb 02, 2023Observed: 16.79 ft at 8:15AM Feb 02, 2023Observed: 16.8 ft at 8:30AM Feb 02, 2023Observed: 16.8 ft at 8:45AM Feb 02, 2023Observed: 16.77 ft at 9:00AM Feb 02, 2023Observed: 16.78 ft at 9:15AM Feb 02, 2023Observed: 16.78 ft at 9:30AM Feb 02, 2023Observed: 16.76 ft at 9:45AM Feb 02, 2023Observed: 16.75 ft at 10:00AM Feb 02, 2023Observed: 16.75 ft at 10:15AM Feb 02, 2023Observed: 16.75 ft at 10:30AM Feb 02, 2023Observed: 16.74 ft at 10:45AM Feb 02, 2023Observed: 16.74 ft at 11:00AM Feb 02, 2023Observed: 16.73 ft at 11:15AM Feb 02, 2023Observed: 16.73 ft at 11:30AM Feb 02, 2023Observed: 16.72 ft at 11:45AM Feb 02, 2023Observed: 16.71 ft at 12:00PM Feb 02, 2023Observed: 16.7 ft at 12:15PM Feb 02, 2023Observed: 16.72 ft at 12:30PM Feb 02, 2023Observed: 16.71 ft at 12:45PM Feb 02, 2023Observed: 16.7 ft at 1:00PM Feb 02, 2023Observed: 16.7 ft at 1:15PM Feb 02, 2023Observed: 16.68 ft at 1:30PM Feb 02, 2023Observed: 16.68 ft at 1:45PM Feb 02, 2023Observed: 16.61 ft at 2:00PM Feb 02, 2023Observed: 16.67 ft at 2:15PM Feb 02, 2023Observed: 16.65 ft at 2:30PM Feb 02, 2023Observed: 16.66 ft at 2:45PM Feb 02, 2023Observed: 16.67 ft at 3:00PM Feb 02, 2023Observed: 16.64 ft at 3:15PM Feb 02, 2023Observed: 16.64 ft at 3:30PM Feb 02, 2023Observed: 16.62 ft at 3:45PM Feb 02, 2023Observed: 16.63 ft at 4:00PM Feb 02, 2023Observed: 16.62 ft at 4:15PM Feb 02, 2023Observed: 16.63 ft at 4:30PM Feb 02, 2023Observed: 16.61 ft at 4:45PM Feb 02, 2023Observed: 16.59 ft at 5:00PM Feb 02, 2023Observed: 16.6 ft at 5:15PM Feb 02, 2023Observed: 16.6 ft at 5:30PM Feb 02, 2023Observed: 16.58 ft at 5:45PM Feb 02, 2023Observed: 16.57 ft at 6:00PM Feb 02, 2023Observed: 16.56 ft at 6:15PM Feb 02, 2023Observed: 16.55 ft at 6:30PM Feb 02, 2023Observed: 16.56 ft at 6:45PM Feb 02, 2023Observed: 16.57 ft at 7:00PM Feb 02, 2023Observed: 16.53 ft at 7:15PM Feb 02, 2023Observed: 16.53 ft at 7:30PM Feb 02, 2023Observed: 16.53 ft at 7:45PM Feb 02, 2023Observed: 16.5 ft at 8:00PM Feb 02, 2023Observed: 16.51 ft at 8:15PM Feb 02, 2023Observed: 16.5 ft at 8:30PM Feb 02, 2023Observed: 16.49 ft at 8:45PM Feb 02, 2023Observed: 16.48 ft at 9:00PM Feb 02, 2023Observed: 16.49 ft at 9:15PM Feb 02, 2023Observed: 16.46 ft at 9:30PM Feb 02, 2023Observed: 16.44 ft at 9:45PM Feb 02, 2023Observed: 16.45 ft at 10:00PM Feb 02, 2023Observed: 16.46 ft at 10:15PM Feb 02, 2023Observed: 16.45 ft at 10:30PM Feb 02, 2023Observed: 16.43 ft at 10:45PM Feb 02, 2023Observed: 16.45 ft at 11:00PM Feb 02, 2023Observed: 16.42 ft at 11:15PM Feb 02, 2023Observed: 16.4 ft at 11:30PM Feb 02, 2023Observed: 16.41 ft at 11:45PM Feb 02, 2023Observed: 16.38 ft at 12:00AM Feb 03, 2023Observed: 16.41 ft at 12:15AM Feb 03, 2023Observed: 16.38 ft at 12:30AM Feb 03, 2023Observed: 16.37 ft at 12:45AM Feb 03, 2023Observed: 16.38 ft at 1:00AM Feb 03, 2023Observed: 16.34 ft at 1:15AM Feb 03, 2023Observed: 16.34 ft at 1:30AM Feb 03, 2023Observed: 16.36 ft at 1:45AM Feb 03, 2023Observed: 16.31 ft at 2:00AM Feb 03, 2023Observed: 16.33 ft at 2:15AM Feb 03, 2023Observed: 16.32 ft at 2:30AM Feb 03, 2023Observed: 16.32 ft at 2:45AM Feb 03, 2023Observed: 16.31 ft at 3:00AM Feb 03, 2023Observed: 16.31 ft at 3:15AM Feb 03, 2023Observed: 16.3 ft at 3:30AM Feb 03, 2023Observed: 16.29 ft at 3:45AM Feb 03, 2023Observed: 16.29 ft at 4:00AM Feb 03, 2023Observed: 16.29 ft at 4:15AM Feb 03, 2023Observed: 16.26 ft at 4:30AM Feb 03, 2023Observed: 16.27 ft at 4:45AM Feb 03, 2023Observed: 16.27 ft at 5:00AM Feb 03, 2023Observed: 16.24 ft at 5:15AM Feb 03, 2023Observed: 16.24 ft at 5:30AM Feb 03, 2023Observed: 16.22 ft at 5:45AM Feb 03, 2023Observed: 16.23 ft at 6:00AM Feb 03, 2023Observed: 16.21 ft at 6:15AM Feb 03, 2023Observed: 16.19 ft at 6:30AM Feb 03, 2023Observed: 16.21 ft at 6:45AM Feb 03, 2023Observed: 16.2 ft at 7:00AM Feb 03, 2023Observed: 16.18 ft at 7:15AM Feb 03, 2023Observed: 16.18 ft at 7:30AM Feb 03, 2023Observed: 16.18 ft at 7:45AM Feb 03, 2023Observed: 16.17 ft at 8:00AM Feb 03, 2023Observed: 16.16 ft at 8:15AM Feb 03, 2023Observed: 16.15 ft at 8:30AM Feb 03, 2023Observed: 16.15 ft at 8:45AM Feb 03, 2023Observed: 16.13 ft at 9:00AM Feb 03, 2023Observed: 16.1 ft at 9:15AM Feb 03, 2023Observed: 16.12 ft at 9:30AM Feb 03, 2023Observed: 16.12 ft at 9:45AM Feb 03, 2023Observed: 16.12 ft at 10:00AM Feb 03, 2023Observed: 16.12 ft at 10:15AM Feb 03, 2023Observed: 16.1 ft at 10:30AM Feb 03, 2023Observed: 16.11 ft at 10:45AM Feb 03, 2023Observed: 16.1 ft at 11:00AM Feb 03, 2023Observed: 16.09 ft at 11:15AM Feb 03, 2023Observed: 16.08 ft at 11:30AM Feb 03, 2023Observed: 16.09 ft at 11:45AM Feb 03, 2023Observed: 16.07 ft at 12:00PM Feb 03, 2023Observed: 16.05 ft at 12:15PM Feb 03, 2023Observed: 16.05 ft at 12:30PM Feb 03, 2023Observed: 16.04 ft at 12:45PM Feb 03, 2023Observed: 16.04 ft at 1:00PM Feb 03, 2023Observed: 16.04 ft at 1:15PM Feb 03, 2023Observed: 16.01 ft at 1:30PM Feb 03, 2023Observed: 16.02 ft at 1:45PM Feb 03, 2023Observed: 16.02 ft at 2:00PM Feb 03, 2023Observed: 16 ft at 2:15PM Feb 03, 2023Observed: 15.99 ft at 2:30PM Feb 03, 2023Observed: 16.01 ft at 2:45PM Feb 03, 2023Observed: 15.98 ft at 3:00PM Feb 03, 2023Observed: 15.96 ft at 3:15PM Feb 03, 2023Observed: 15.96 ft at 3:30PM Feb 03, 2023Observed: 15.96 ft at 3:45PM Feb 03, 2023Observed: 15.96 ft at 4:00PM Feb 03, 2023Observed: 15.95 ft at 4:15PM Feb 03, 2023Observed: 15.95 ft at 4:30PM Feb 03, 2023Observed: 15.93 ft at 4:45PM Feb 03, 2023Observed: 15.94 ft at 5:00PM Feb 03, 2023Observed: 15.92 ft at 5:15PM Feb 03, 2023Observed: 15.92 ft at 5:30PM Feb 03, 2023Observed: 15.91 ft at 5:45PM Feb 03, 2023Observed: 15.91 ft at 6:00PM Feb 03, 2023Observed: 15.9 ft at 6:15PM Feb 03, 2023Observed: 15.9 ft at 6:30PM Feb 03, 2023Observed: 15.89 ft at 6:45PM Feb 03, 2023Observed: 15.89 ft at 7:00PM Feb 03, 2023Observed: 15.88 ft at 7:15PM Feb 03, 2023Observed: 15.89 ft at 7:30PM Feb 03, 2023Observed: 15.88 ft at 7:45PM Feb 03, 2023Observed: 15.87 ft at 8:00PM Feb 03, 2023Observed: 15.86 ft at 8:15PM Feb 03, 2023Observed: 15.85 ft at 8:30PM Feb 03, 2023Observed: 15.85 ft at 8:45PM Feb 03, 2023Observed: 15.85 ft at 9:00PM Feb 03, 2023Observed: 15.83 ft at 9:15PM Feb 03, 2023Observed: 15.83 ft at 9:30PM Feb 03, 2023Observed: 15.83 ft at 9:45PM Feb 03, 2023Observed: 15.82 ft at 10:00PM Feb 03, 2023Observed: 15.82 ft at 10:15PM Feb 03, 2023Observed: 15.82 ft at 10:30PM Feb 03, 2023Observed: 15.81 ft at 10:45PM Feb 03, 2023Observed: 15.8 ft at 11:00PM Feb 03, 2023Observed: 15.81 ft at 11:15PM Feb 03, 2023Observed: 15.8 ft at 11:30PM Feb 03, 2023Observed: 15.81 ft at 11:45PM Feb 03, 2023Observed: 15.8 ft at 12:00AM Feb 04, 2023Observed: 15.79 ft at 12:15AM Feb 04, 2023Observed: 15.79 ft at 12:30AM Feb 04, 2023Observed: 15.76 ft at 12:45AM Feb 04, 2023Observed: 15.77 ft at 1:00AM Feb 04, 2023Observed: 15.77 ft at 1:15AM Feb 04, 2023Observed: 15.76 ft at 1:30AM Feb 04, 2023Observed: 15.75 ft at 1:45AM Feb 04, 2023Observed: 15.75 ft at 2:00AM Feb 04, 2023Observed: 15.73 ft at 2:15AM Feb 04, 2023Observed: 15.74 ft at 2:30AM Feb 04, 2023Observed: 15.74 ft at 2:45AM Feb 04, 2023Observed: 15.73 ft at 3:00AM Feb 04, 2023Observed: 15.73 ft at 3:15AM Feb 04, 2023Observed: 15.73 ft at 3:30AM Feb 04, 2023Observed: 15.71 ft at 3:45AM Feb 04, 2023Observed: 15.7 ft at 4:00AM Feb 04, 2023Observed: 15.7 ft at 4:15AM Feb 04, 2023Observed: 15.7 ft at 4:30AM Feb 04, 2023Observed: 15.7 ft at 4:45AM Feb 04, 2023Observed: 15.7 ft at 5:00AM Feb 04, 2023Observed: 15.69 ft at 5:15AM Feb 04, 2023Observed: 15.68 ft at 5:30AM Feb 04, 2023Observed: 15.68 ft at 5:45AM Feb 04, 2023Observed: 15.67 ft at 6:00AM Feb 04, 2023Observed: 15.68 ft at 6:15AM Feb 04, 2023Observed: 15.67 ft at 6:30AM Feb 04, 2023Observed: 15.67 ft at 6:45AM Feb 04, 2023Highest Forecast: 15.7 ft 8:00AM Feb 04, 2023Highest Forecast: 15.7 ft 9:00AM Feb 04, 2023Forecast: 15.6 ft 10:00AM Feb 04, 2023Forecast: 15.6 ft 11:00AM Feb 04, 2023Forecast: 15.6 ft 12:00PM Feb 04, 2023Forecast: 15.6 ft 1:00PM Feb 04, 2023Forecast: 15.6 ft 2:00PM Feb 04, 2023Forecast: 15.5 ft 3:00PM Feb 04, 2023Forecast: 15.5 ft 4:00PM Feb 04, 2023Forecast: 15.5 ft 5:00PM Feb 04, 2023Forecast: 15.5 ft 6:00PM Feb 04, 2023Forecast: 15.5 ft 7:00PM Feb 04, 2023Forecast: 15.5 ft 8:00PM Feb 04, 2023Forecast: 15.4 ft 9:00PM Feb 04, 2023Forecast: 15.4 ft 10:00PM Feb 04, 2023Forecast: 15.4 ft 11:00PM Feb 04, 2023Forecast: 15.4 ft 12:00AM Feb 05, 2023Forecast: 15.4 ft 1:00AM Feb 05, 2023Forecast: 15.4 ft 2:00AM Feb 05, 2023Forecast: 15.4 ft 3:00AM Feb 05, 2023Forecast: 15.3 ft 4:00AM Feb 05, 2023Forecast: 15.3 ft 5:00AM Feb 05, 2023Forecast: 15.3 ft 6:00AM Feb 05, 2023Forecast: 15.3 ft 7:00AM Feb 05, 2023Forecast: 15.3 ft 8:00AM Feb 05, 2023Forecast: 15.3 ft 9:00AM Feb 05, 2023Forecast: 15.3 ft 10:00AM Feb 05, 2023Forecast: 15.3 ft 11:00AM Feb 05, 2023Forecast: 15.2 ft 12:00PM Feb 05, 2023Forecast: 15.2 ft 1:00PM Feb 05, 2023Forecast: 15.2 ft 2:00PM Feb 05, 2023Forecast: 15.2 ft 3:00PM Feb 05, 2023Forecast: 15.2 ft 4:00PM Feb 05, 2023Forecast: 15.2 ft 5:00PM Feb 05, 2023Forecast: 15.2 ft 6:00PM Feb 05, 2023Forecast: 15.2 ft 7:00PM Feb 05, 2023Forecast: 15.1 ft 8:00PM Feb 05, 2023Forecast: 15.1 ft 9:00PM Feb 05, 2023Forecast: 15.1 ft 10:00PM Feb 05, 2023Forecast: 15.1 ft 11:00PM Feb 05, 2023Forecast: 15.1 ft 12:00AM Feb 06, 2023Forecast: 15.1 ft 1:00AM Feb 06, 2023Forecast: 15.1 ft 2:00AM Feb 06, 2023Forecast: 15.1 ft 3:00AM Feb 06, 2023Forecast: 15.1 ft 4:00AM Feb 06, 2023Forecast: 15 ft 5:00AM Feb 06, 2023Forecast: 15 ft 6:00AM Feb 06, 2023Forecast: 15 ft 7:00AM Feb 06, 2023Forecast: 15 ft 8:00AM Feb 06, 2023Forecast: 15 ft 9:00AM Feb 06, 2023Forecast: 15 ft 10:00AM Feb 06, 2023Forecast: 15 ft 11:00AM Feb 06, 2023Forecast: 15 ft 12:00PM Feb 06, 2023Forecast: 15 ft 1:00PM Feb 06, 2023Forecast: 15 ft 2:00PM Feb 06, 2023Forecast: 15 ft 3:00PM Feb 06, 2023Forecast: 15 ft 4:00PM Feb 06, 2023Forecast: 15 ft 5:00PM Feb 06, 2023Forecast: 15 ft 6:00PM Feb 06, 2023Forecast: 15 ft 7:00PM Feb 06, 2023Forecast: 15 ft 8:00PM Feb 06, 2023Forecast: 15 ft 9:00PM Feb 06, 2023Forecast: 15 ft 10:00PM Feb 06, 2023Forecast: 15 ft 11:00PM Feb 06, 2023Forecast: 15 ft 12:00AM Feb 07, 2023Forecast: 15 ft 1:00AM Feb 07, 2023Forecast: 15 ft 2:00AM Feb 07, 2023Forecast: 15 ft 3:00AM Feb 07, 2023Forecast: 15 ft 4:00AM Feb 07, 2023Forecast: 15 ft 5:00AM Feb 07, 2023Forecast: 15 ft 6:00AM Feb 07, 2023Forecast: 15 ft 7:00AM Feb 07, 2023Forecast: 14.9 ft 8:00AM Feb 07, 2023Forecast: 14.9 ft 9:00AM Feb 07, 2023Forecast: 14.9 ft 10:00AM Feb 07, 2023Forecast: 14.9 ft 11:00AM Feb 07, 2023Forecast: 14.9 ft 12:00PM Feb 07, 2023Forecast: 14.9 ft 1:00PM Feb 07, 2023Forecast: 14.9 ft 2:00PM Feb 07, 2023Forecast: 14.9 ft 3:00PM Feb 07, 2023Forecast: 14.8 ft 4:00PM Feb 07, 2023Forecast: 14.8 ft 5:00PM Feb 07, 2023Forecast: 14.8 ft 6:00PM Feb 07, 2023Forecast: 14.8 ft 7:00PM Feb 07, 2023Forecast: 14.8 ft 8:00PM Feb 07, 2023Forecast: 14.8 ft 9:00PM Feb 07, 2023Forecast: 14.7 ft 10:00PM Feb 07, 2023Forecast: 14.7 ft 11:00PM Feb 07, 2023Forecast: 14.7 ft 12:00AM Feb 08, 2023Forecast: 14.7 ft 1:00AM Feb 08, 2023Forecast: 14.7 ft 2:00AM Feb 08, 2023Forecast: 14.7 ft 3:00AM Feb 08, 2023Forecast: 14.7 ft 4:00AM Feb 08, 2023USGS--Water Resources of the United StatesVNSC1(plotting HGIRG) Graph Created (7:38AM Feb 4, 2023)ObservedForecast (issued 1:28PM Feb 3)Latest observed value: 15.67 ft at 6:45 AM PST 4-Feb-2023. Flood Stage is 29 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the San Joaquin River at Vernalis are issued routinely year-round.
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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:
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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
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