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Hydrograph River at a Glance Download
Napa River near St. Helena Stage (ft)Flow (cfs)Observed: 3.46 ft at 4:00PM Mar 18, 2023Observed: 3.46 ft at 4:15PM Mar 18, 2023Observed: 3.45 ft at 4:30PM Mar 18, 2023Observed: 3.44 ft at 4:45PM Mar 18, 2023Observed: 3.44 ft at 5:00PM Mar 18, 2023Observed: 3.44 ft at 5:15PM Mar 18, 2023Observed: 3.44 ft at 5:30PM Mar 18, 2023Observed: 3.43 ft at 5:45PM Mar 18, 2023Observed: 3.43 ft at 6:00PM Mar 18, 2023Observed: 3.42 ft at 6:15PM Mar 18, 2023Observed: 3.42 ft at 6:30PM Mar 18, 2023Observed: 3.41 ft at 6:45PM Mar 18, 2023Observed: 3.41 ft at 7:00PM Mar 18, 2023Observed: 3.4 ft at 7:15PM Mar 18, 2023Observed: 3.41 ft at 7:30PM Mar 18, 2023Observed: 3.4 ft at 7:45PM Mar 18, 2023Observed: 3.4 ft at 8:00PM Mar 18, 2023Observed: 3.39 ft at 8:15PM Mar 18, 2023Observed: 3.39 ft at 8:30PM Mar 18, 2023Observed: 3.39 ft at 8:45PM Mar 18, 2023Observed: 3.39 ft at 9:00PM Mar 18, 2023Observed: 3.38 ft at 9:15PM Mar 18, 2023Observed: 3.38 ft at 9:30PM Mar 18, 2023Observed: 3.37 ft at 9:45PM Mar 18, 2023Observed: 3.37 ft at 10:00PM Mar 18, 2023Observed: 3.37 ft at 10:15PM Mar 18, 2023Observed: 3.36 ft at 10:30PM Mar 18, 2023Observed: 3.37 ft at 10:45PM Mar 18, 2023Observed: 3.36 ft at 11:00PM Mar 18, 2023Observed: 3.36 ft at 11:15PM Mar 18, 2023Observed: 3.35 ft at 11:30PM Mar 18, 2023Observed: 3.36 ft at 11:45PM Mar 18, 2023Observed: 3.35 ft at 12:00AM Mar 19, 2023Observed: 3.35 ft at 12:15AM Mar 19, 2023Observed: 3.35 ft at 12:30AM Mar 19, 2023Observed: 3.35 ft at 12:45AM Mar 19, 2023Observed: 3.34 ft at 1:00AM Mar 19, 2023Observed: 3.35 ft at 1:15AM Mar 19, 2023Observed: 3.34 ft at 1:30AM Mar 19, 2023Observed: 3.35 ft at 1:45AM Mar 19, 2023Observed: 3.35 ft at 2:00AM Mar 19, 2023Observed: 3.35 ft at 2:15AM Mar 19, 2023Observed: 3.36 ft at 2:30AM Mar 19, 2023Observed: 3.38 ft at 2:45AM Mar 19, 2023Observed: 3.38 ft at 3:00AM Mar 19, 2023Observed: 3.38 ft at 3:15AM Mar 19, 2023Observed: 3.39 ft at 3:30AM Mar 19, 2023Observed: 3.4 ft at 3:45AM Mar 19, 2023Observed: 3.4 ft at 4:00AM Mar 19, 2023Observed: 3.41 ft at 4:15AM Mar 19, 2023Observed: 3.41 ft at 4:30AM Mar 19, 2023Observed: 3.41 ft at 4:45AM Mar 19, 2023Observed: 3.42 ft at 5:00AM Mar 19, 2023Observed: 3.43 ft at 5:15AM Mar 19, 2023Observed: 3.45 ft at 5:30AM Mar 19, 2023Observed: 3.46 ft at 5:45AM Mar 19, 2023Observed: 3.47 ft at 6:00AM Mar 19, 2023Observed: 3.49 ft at 6:15AM Mar 19, 2023Observed: 3.51 ft at 6:30AM Mar 19, 2023Observed: 3.53 ft at 6:45AM Mar 19, 2023Observed: 3.56 ft at 7:00AM Mar 19, 2023Observed: 3.57 ft at 7:15AM Mar 19, 2023Observed: 3.59 ft at 7:30AM Mar 19, 2023Observed: 3.62 ft at 7:45AM Mar 19, 2023Observed: 3.66 ft at 8:00AM Mar 19, 2023Observed: 3.7 ft at 8:15AM Mar 19, 2023Observed: 3.72 ft at 8:30AM Mar 19, 2023Observed: 3.73 ft at 8:45AM Mar 19, 2023Observed: 3.75 ft at 9:00AM Mar 19, 2023Observed: 3.76 ft at 9:15AM Mar 19, 2023Observed: 3.78 ft at 9:30AM Mar 19, 2023Observed: 3.78 ft at 9:45AM Mar 19, 2023Observed: 3.8 ft at 10:00AM Mar 19, 2023Observed: 3.8 ft at 10:15AM Mar 19, 2023Observed: 3.81 ft at 10:30AM Mar 19, 2023Observed: 3.81 ft at 10:45AM Mar 19, 2023Observed: 3.81 ft at 11:00AM Mar 19, 2023Observed: 3.81 ft at 11:15AM Mar 19, 2023Observed: 3.79 ft at 11:30AM Mar 19, 2023Observed: 3.79 ft at 11:45AM Mar 19, 2023Observed: 3.79 ft at 12:00PM Mar 19, 2023Observed: 3.78 ft at 12:15PM Mar 19, 2023Observed: 3.78 ft at 12:30PM Mar 19, 2023Observed: 3.77 ft at 12:45PM Mar 19, 2023Observed: 3.77 ft at 1:00PM Mar 19, 2023Observed: 3.76 ft at 1:15PM Mar 19, 2023Observed: 3.75 ft at 1:30PM Mar 19, 2023Observed: 3.76 ft at 1:45PM Mar 19, 2023Observed: 3.74 ft at 2:00PM Mar 19, 2023Observed: 3.75 ft at 2:15PM Mar 19, 2023Observed: 3.74 ft at 2:30PM Mar 19, 2023Observed: 3.73 ft at 2:45PM Mar 19, 2023Observed: 3.73 ft at 3:00PM Mar 19, 2023Observed: 3.72 ft at 3:15PM Mar 19, 2023Observed: 3.72 ft at 3:30PM Mar 19, 2023Observed: 3.71 ft at 3:45PM Mar 19, 2023Observed: 3.7 ft at 4:00PM Mar 19, 2023Observed: 3.7 ft at 4:15PM Mar 19, 2023Observed: 3.69 ft at 4:30PM Mar 19, 2023Observed: 3.69 ft at 4:45PM Mar 19, 2023Observed: 3.68 ft at 5:00PM Mar 19, 2023Observed: 3.67 ft at 5:15PM Mar 19, 2023Observed: 3.68 ft at 5:30PM Mar 19, 2023Observed: 3.66 ft at 5:45PM Mar 19, 2023Observed: 3.67 ft at 6:00PM Mar 19, 2023Observed: 3.66 ft at 6:15PM Mar 19, 2023Observed: 3.66 ft at 6:30PM Mar 19, 2023Observed: 3.66 ft at 6:45PM Mar 19, 2023Observed: 3.67 ft at 7:00PM Mar 19, 2023Observed: 3.65 ft at 7:15PM Mar 19, 2023Observed: 3.65 ft at 7:30PM Mar 19, 2023Observed: 3.65 ft at 7:45PM Mar 19, 2023Observed: 3.64 ft at 8:00PM Mar 19, 2023Observed: 3.64 ft at 8:15PM Mar 19, 2023Observed: 3.64 ft at 8:30PM Mar 19, 2023Observed: 3.63 ft at 8:45PM Mar 19, 2023Observed: 3.63 ft at 9:00PM Mar 19, 2023Observed: 3.62 ft at 9:15PM Mar 19, 2023Observed: 3.61 ft at 9:30PM Mar 19, 2023Observed: 3.61 ft at 9:45PM Mar 19, 2023Observed: 3.61 ft at 10:00PM Mar 19, 2023Observed: 3.6 ft at 10:15PM Mar 19, 2023Observed: 3.59 ft at 10:30PM Mar 19, 2023Observed: 3.59 ft at 10:45PM Mar 19, 2023Observed: 3.59 ft at 11:00PM Mar 19, 2023Observed: 3.58 ft at 11:15PM Mar 19, 2023Observed: 3.57 ft at 11:30PM Mar 19, 2023Observed: 3.57 ft at 11:45PM Mar 19, 2023Observed: 3.57 ft at 12:00AM Mar 20, 2023Observed: 3.56 ft at 12:15AM Mar 20, 2023Observed: 3.56 ft at 12:30AM Mar 20, 2023Observed: 3.56 ft at 12:45AM Mar 20, 2023Observed: 3.55 ft at 1:00AM Mar 20, 2023Observed: 3.55 ft at 1:15AM Mar 20, 2023Observed: 3.55 ft at 1:30AM Mar 20, 2023Observed: 3.55 ft at 1:45AM Mar 20, 2023Observed: 3.55 ft at 2:00AM Mar 20, 2023Observed: 3.54 ft at 2:15AM Mar 20, 2023Observed: 3.54 ft at 2:30AM Mar 20, 2023Observed: 3.54 ft at 2:45AM Mar 20, 2023Observed: 3.53 ft at 3:00AM Mar 20, 2023Observed: 3.54 ft at 3:15AM Mar 20, 2023Observed: 3.53 ft at 3:30AM Mar 20, 2023Observed: 3.53 ft at 3:45AM Mar 20, 2023Observed: 3.52 ft at 4:00AM Mar 20, 2023Observed: 3.52 ft at 4:15AM Mar 20, 2023Observed: 3.51 ft at 4:30AM Mar 20, 2023Observed: 3.51 ft at 4:45AM Mar 20, 2023Observed: 3.5 ft at 5:00AM Mar 20, 2023Observed: 3.5 ft at 5:15AM Mar 20, 2023Observed: 3.49 ft at 5:30AM Mar 20, 2023Observed: 3.49 ft at 5:45AM Mar 20, 2023Observed: 3.49 ft at 6:00AM Mar 20, 2023Observed: 3.48 ft at 6:15AM Mar 20, 2023Observed: 3.47 ft at 6:30AM Mar 20, 2023Observed: 3.48 ft at 6:45AM Mar 20, 2023Observed: 3.47 ft at 7:00AM Mar 20, 2023Observed: 3.47 ft at 7:15AM Mar 20, 2023Observed: 3.46 ft at 7:30AM Mar 20, 2023Observed: 3.45 ft at 7:45AM Mar 20, 2023Observed: 3.44 ft at 8:00AM Mar 20, 2023Observed: 3.44 ft at 8:15AM Mar 20, 2023Observed: 3.44 ft at 8:30AM Mar 20, 2023Observed: 3.43 ft at 8:45AM Mar 20, 2023Observed: 3.43 ft at 9:00AM Mar 20, 2023Observed: 3.42 ft at 9:15AM Mar 20, 2023Observed: 3.42 ft at 9:30AM Mar 20, 2023Observed: 3.41 ft at 9:45AM Mar 20, 2023Observed: 3.41 ft at 10:00AM Mar 20, 2023Observed: 3.41 ft at 10:15AM Mar 20, 2023Observed: 3.4 ft at 10:30AM Mar 20, 2023Observed: 3.41 ft at 10:45AM Mar 20, 2023Observed: 3.4 ft at 11:00AM Mar 20, 2023Observed: 3.4 ft at 11:15AM Mar 20, 2023Observed: 3.39 ft at 11:30AM Mar 20, 2023Observed: 3.39 ft at 11:45AM Mar 20, 2023Observed: 3.39 ft at 12:00PM Mar 20, 2023Observed: 3.38 ft at 12:15PM Mar 20, 2023Observed: 3.37 ft at 12:30PM Mar 20, 2023Observed: 3.38 ft at 12:45PM Mar 20, 2023Observed: 3.37 ft at 1:00PM Mar 20, 2023Observed: 3.36 ft at 1:15PM Mar 20, 2023Observed: 3.36 ft at 1:30PM Mar 20, 2023Observed: 3.36 ft at 1:45PM Mar 20, 2023Observed: 3.35 ft at 2:00PM Mar 20, 2023Observed: 3.35 ft at 2:15PM Mar 20, 2023Observed: 3.34 ft at 2:30PM Mar 20, 2023Observed: 3.34 ft at 2:45PM Mar 20, 2023Observed: 3.34 ft at 3:00PM Mar 20, 2023Observed: 3.32 ft at 3:15PM Mar 20, 2023Observed: 3.33 ft at 3:30PM Mar 20, 2023Observed: 3.33 ft at 3:45PM Mar 20, 2023Observed: 3.32 ft at 4:00PM Mar 20, 2023Observed: 3.32 ft at 4:15PM Mar 20, 2023Observed: 3.31 ft at 4:30PM Mar 20, 2023Observed: 3.3 ft at 4:45PM Mar 20, 2023Observed: 3.31 ft at 5:00PM Mar 20, 2023Observed: 3.3 ft at 5:15PM Mar 20, 2023Observed: 3.3 ft at 5:30PM Mar 20, 2023Observed: 3.29 ft at 5:45PM Mar 20, 2023Observed: 3.3 ft at 6:00PM Mar 20, 2023Observed: 3.29 ft at 6:15PM Mar 20, 2023Observed: 3.29 ft at 6:30PM Mar 20, 2023Observed: 3.28 ft at 6:45PM Mar 20, 2023Observed: 3.28 ft at 7:00PM Mar 20, 2023Observed: 3.27 ft at 7:15PM Mar 20, 2023Observed: 3.27 ft at 7:30PM Mar 20, 2023Observed: 3.27 ft at 7:45PM Mar 20, 2023Observed: 3.27 ft at 8:00PM Mar 20, 2023Observed: 3.26 ft at 8:15PM Mar 20, 2023Observed: 3.26 ft at 8:30PM Mar 20, 2023Observed: 3.26 ft at 8:45PM Mar 20, 2023Observed: 3.26 ft at 9:00PM Mar 20, 2023Observed: 3.25 ft at 9:15PM Mar 20, 2023Observed: 3.25 ft at 9:30PM Mar 20, 2023Observed: 3.25 ft at 9:45PM Mar 20, 2023Observed: 3.25 ft at 10:00PM Mar 20, 2023Observed: 3.24 ft at 10:15PM Mar 20, 2023Observed: 3.24 ft at 10:30PM Mar 20, 2023Observed: 3.23 ft at 10:45PM Mar 20, 2023Observed: 3.24 ft at 11:00PM Mar 20, 2023Observed: 3.23 ft at 11:15PM Mar 20, 2023Observed: 3.23 ft at 11:30PM Mar 20, 2023Observed: 3.22 ft at 11:45PM Mar 20, 2023Observed: 3.23 ft at 12:00AM Mar 21, 2023Observed: 3.22 ft at 12:15AM Mar 21, 2023Observed: 3.22 ft at 12:30AM Mar 21, 2023Observed: 3.22 ft at 12:45AM Mar 21, 2023Observed: 3.22 ft at 1:00AM Mar 21, 2023Observed: 3.21 ft at 1:15AM Mar 21, 2023Observed: 3.21 ft at 1:30AM Mar 21, 2023Observed: 3.21 ft at 1:45AM Mar 21, 2023Observed: 3.2 ft at 2:00AM Mar 21, 2023Observed: 3.21 ft at 2:15AM Mar 21, 2023Observed: 3.2 ft at 2:30AM Mar 21, 2023Observed: 3.2 ft at 2:45AM Mar 21, 2023Observed: 3.2 ft at 3:00AM Mar 21, 2023Observed: 3.2 ft at 3:15AM Mar 21, 2023Observed: 3.19 ft at 3:30AM Mar 21, 2023Observed: 3.2 ft at 3:45AM Mar 21, 2023Observed: 3.2 ft at 4:00AM Mar 21, 2023Observed: 3.19 ft at 4:15AM Mar 21, 2023Observed: 3.19 ft at 4:30AM Mar 21, 2023Observed: 3.19 ft at 4:45AM Mar 21, 2023Observed: 3.19 ft at 5:00AM Mar 21, 2023Observed: 3.19 ft at 5:15AM Mar 21, 2023Observed: 3.18 ft at 5:30AM Mar 21, 2023Observed: 3.18 ft at 5:45AM Mar 21, 2023Observed: 3.18 ft at 6:00AM Mar 21, 2023Observed: 3.19 ft at 6:15AM Mar 21, 2023Observed: 3.18 ft at 6:30AM Mar 21, 2023Observed: 3.18 ft at 6:45AM Mar 21, 2023Observed: 3.18 ft at 7:00AM Mar 21, 2023Observed: 3.18 ft at 7:15AM Mar 21, 2023Observed: 3.19 ft at 7:30AM Mar 21, 2023Observed: 3.19 ft at 7:45AM Mar 21, 2023Observed: 3.19 ft at 8:00AM Mar 21, 2023Observed: 3.21 ft at 8:15AM Mar 21, 2023Observed: 3.22 ft at 8:30AM Mar 21, 2023Observed: 3.23 ft at 8:45AM Mar 21, 2023Observed: 3.24 ft at 9:00AM Mar 21, 2023Observed: 3.25 ft at 9:15AM Mar 21, 2023Observed: 3.26 ft at 9:30AM Mar 21, 2023Observed: 3.26 ft at 9:45AM Mar 21, 2023Observed: 3.28 ft at 10:00AM Mar 21, 2023Observed: 3.32 ft at 10:15AM Mar 21, 2023Observed: 3.36 ft at 10:30AM Mar 21, 2023Observed: 3.41 ft at 10:45AM Mar 21, 2023Observed: 3.45 ft at 11:00AM Mar 21, 2023Observed: 3.51 ft at 11:15AM Mar 21, 2023Observed: 3.54 ft at 11:30AM Mar 21, 2023Observed: 3.57 ft at 11:45AM Mar 21, 2023Observed: 3.63 ft at 12:00PM Mar 21, 2023Observed: 3.71 ft at 12:15PM Mar 21, 2023Observed: 3.84 ft at 12:30PM Mar 21, 2023Observed: 3.96 ft at 12:45PM Mar 21, 2023Observed: 4.09 ft at 1:00PM Mar 21, 2023Observed: 4.26 ft at 1:15PM Mar 21, 2023Observed: 4.45 ft at 1:30PM Mar 21, 2023Observed: 4.7 ft at 1:45PM Mar 21, 2023Observed: 4.94 ft at 2:00PM Mar 21, 2023Observed: 5.22 ft at 2:15PM Mar 21, 2023Observed: 5.49 ft at 2:30PM Mar 21, 2023Observed: 5.68 ft at 2:45PM Mar 21, 2023Observed: 5.82 ft at 3:00PM Mar 21, 2023Observed: 5.94 ft at 3:15PM Mar 21, 2023Observed: 6.06 ft at 3:30PM Mar 21, 2023Observed: 6.25 ft at 3:45PM Mar 21, 2023Observed: 6.46 ft at 4:00PM Mar 21, 2023Observed: 6.63 ft at 4:15PM Mar 21, 2023Observed: 6.83 ft at 4:30PM Mar 21, 2023Observed: 6.98 ft at 4:45PM Mar 21, 2023Observed: 7.17 ft at 5:00PM Mar 21, 2023Observed: 7.35 ft at 5:15PM Mar 21, 2023Observed: 7.51 ft at 5:30PM Mar 21, 2023Observed: 7.71 ft at 5:45PM Mar 21, 2023Observed: 7.84 ft at 6:00PM Mar 21, 2023Observed: 7.9 ft at 6:15PM Mar 21, 2023Observed: 7.94 ft at 6:30PM Mar 21, 2023Observed: 8.02 ft at 6:45PM Mar 21, 2023Observed: 8.1 ft at 7:00PM Mar 21, 2023Observed: 8.19 ft at 7:15PM Mar 21, 2023Observed: 8.26 ft at 7:30PM Mar 21, 2023Observed: 8.35 ft at 7:45PM Mar 21, 2023Observed: 8.48 ft at 8:00PM Mar 21, 2023Observed: 8.62 ft at 8:15PM Mar 21, 2023Observed: 8.66 ft at 8:30PM Mar 21, 2023Observed: 8.71 ft at 8:45PM Mar 21, 2023Observed: 8.74 ft at 9:00PM Mar 21, 2023Observed: 8.77 ft at 9:15PM Mar 21, 2023Observed: 8.85 ft at 9:30PM Mar 21, 2023Observed: 8.86 ft at 9:45PM Mar 21, 2023Observed: 8.83 ft at 10:00PM Mar 21, 2023Observed: 8.86 ft at 10:15PM Mar 21, 2023Observed: 8.9 ft at 10:30PM Mar 21, 2023Observed: 8.9 ft at 10:45PM Mar 21, 2023Observed: 8.92 ft at 11:00PM Mar 21, 2023Observed: 9 ft at 11:15PM Mar 21, 2023Observed: 8.92 ft at 11:30PM Mar 21, 2023Observed: 8.96 ft at 11:45PM Mar 21, 2023Observed: 9.06 ft at 12:00AM Mar 22, 2023Observed: 9.09 ft at 12:15AM Mar 22, 2023Observed: 9.1 ft at 12:30AM Mar 22, 2023Observed: 9.09 ft at 12:45AM Mar 22, 2023Highest Observation: 9.17 ft at 1:00AM Mar 22, 2023Observed: 9.06 ft at 1:15AM Mar 22, 2023Observed: 9.08 ft at 1:30AM Mar 22, 2023Observed: 9.07 ft at 1:45AM Mar 22, 2023Observed: 9.09 ft at 2:00AM Mar 22, 2023Observed: 9.03 ft at 2:15AM Mar 22, 2023Observed: 9.05 ft at 2:30AM Mar 22, 2023Observed: 8.98 ft at 2:45AM Mar 22, 2023Observed: 8.92 ft at 3:00AM Mar 22, 2023Observed: 8.92 ft at 3:15AM Mar 22, 2023Observed: 8.85 ft at 3:30AM Mar 22, 2023Observed: 8.85 ft at 3:45AM Mar 22, 2023Observed: 8.79 ft at 4:00AM Mar 22, 2023Observed: 8.74 ft at 4:15AM Mar 22, 2023Observed: 8.66 ft at 4:30AM Mar 22, 2023Observed: 8.68 ft at 4:45AM Mar 22, 2023Observed: 8.61 ft at 5:00AM Mar 22, 2023Observed: 8.51 ft at 5:15AM Mar 22, 2023Observed: 8.42 ft at 5:30AM Mar 22, 2023Observed: 8.36 ft at 5:45AM Mar 22, 2023Observed: 8.35 ft at 6:00AM Mar 22, 2023Observed: 8.25 ft at 6:15AM Mar 22, 2023Observed: 8.2 ft at 6:30AM Mar 22, 2023Observed: 8.04 ft at 6:45AM Mar 22, 2023Observed: 8 ft at 7:00AM Mar 22, 2023Observed: 7.87 ft at 7:15AM Mar 22, 2023Observed: 7.83 ft at 7:30AM Mar 22, 2023Observed: 7.73 ft at 7:45AM Mar 22, 2023Observed: 7.67 ft at 8:00AM Mar 22, 2023Observed: 7.67 ft at 8:15AM Mar 22, 2023Observed: 7.56 ft at 8:30AM Mar 22, 2023Observed: 7.47 ft at 8:45AM Mar 22, 2023Observed: 7.35 ft at 9:00AM Mar 22, 2023Observed: 7.33 ft at 9:15AM Mar 22, 2023Observed: 7.32 ft at 9:30AM Mar 22, 2023Observed: 7.23 ft at 9:45AM Mar 22, 2023Observed: 7.16 ft at 10:00AM Mar 22, 2023Observed: 7.08 ft at 10:15AM Mar 22, 2023Observed: 7.02 ft at 10:30AM Mar 22, 2023Observed: 7.07 ft at 10:45AM Mar 22, 2023Observed: 6.89 ft at 11:00AM Mar 22, 2023Observed: 6.89 ft at 11:15AM Mar 22, 2023Observed: 6.81 ft at 11:30AM Mar 22, 2023Observed: 6.81 ft at 11:45AM Mar 22, 2023Observed: 6.76 ft at 12:00PM Mar 22, 2023Observed: 6.73 ft at 12:15PM Mar 22, 2023Observed: 6.66 ft at 12:30PM Mar 22, 2023Observed: 6.54 ft at 12:45PM Mar 22, 2023Observed: 6.52 ft at 1:00PM Mar 22, 2023Observed: 6.49 ft at 1:15PM Mar 22, 2023Observed: 6.49 ft at 1:30PM Mar 22, 2023Observed: 6.44 ft at 1:45PM Mar 22, 2023Observed: 6.37 ft at 2:00PM Mar 22, 2023Observed: 6.38 ft at 2:15PM Mar 22, 2023Observed: 6.31 ft at 2:30PM Mar 22, 2023Observed: 6.25 ft at 2:45PM Mar 22, 2023Observed: 6.26 ft at 3:00PM Mar 22, 2023Observed: 6.16 ft at 3:15PM Mar 22, 2023Observed: 6.15 ft at 3:30PM Mar 22, 2023Observed: 6.18 ft at 3:45PM Mar 22, 2023Observed: 6.09 ft at 4:00PM Mar 22, 2023Observed: 6.07 ft at 4:15PM Mar 22, 2023Observed: 6.03 ft at 4:30PM Mar 22, 2023Observed: 6 ft at 4:45PM Mar 22, 2023Observed: 5.97 ft at 5:00PM Mar 22, 2023Observed: 5.93 ft at 5:15PM Mar 22, 2023Observed: 5.87 ft at 5:30PM Mar 22, 2023Observed: 5.88 ft at 5:45PM Mar 22, 2023Observed: 5.83 ft at 6:00PM Mar 22, 2023Observed: 5.8 ft at 6:15PM Mar 22, 2023Observed: 5.79 ft at 6:30PM Mar 22, 2023Observed: 5.74 ft at 6:45PM Mar 22, 2023Observed: 5.68 ft at 7:00PM Mar 22, 2023Observed: 5.69 ft at 7:15PM Mar 22, 2023Observed: 5.67 ft at 7:30PM Mar 22, 2023Observed: 5.6 ft at 7:45PM Mar 22, 2023Observed: 5.6 ft at 8:00PM Mar 22, 2023Observed: 5.54 ft at 8:15PM Mar 22, 2023Observed: 5.55 ft at 8:30PM Mar 22, 2023Observed: 5.51 ft at 8:45PM Mar 22, 2023Observed: 5.5 ft at 9:00PM Mar 22, 2023Observed: 5.46 ft at 9:15PM Mar 22, 2023Observed: 5.45 ft at 9:30PM Mar 22, 2023Observed: 5.44 ft at 9:45PM Mar 22, 2023Observed: 5.37 ft at 10:00PM Mar 22, 2023Observed: 5.37 ft at 10:15PM Mar 22, 2023Observed: 5.34 ft at 10:30PM Mar 22, 2023Observed: 5.33 ft at 10:45PM Mar 22, 2023Observed: 5.3 ft at 11:00PM Mar 22, 2023Observed: 5.27 ft at 11:15PM Mar 22, 2023Observed: 5.26 ft at 11:30PM Mar 22, 2023Observed: 5.24 ft at 11:45PM Mar 22, 2023Observed: 5.23 ft at 12:00AM Mar 23, 2023Observed: 5.21 ft at 12:15AM Mar 23, 2023Observed: 5.17 ft at 12:30AM Mar 23, 2023Observed: 5.17 ft at 12:45AM Mar 23, 2023Observed: 5.16 ft at 1:00AM Mar 23, 2023Observed: 5.14 ft at 1:15AM Mar 23, 2023Observed: 5.11 ft at 1:30AM Mar 23, 2023Observed: 5.1 ft at 1:45AM Mar 23, 2023Observed: 5.08 ft at 2:00AM Mar 23, 2023Observed: 5.07 ft at 2:15AM Mar 23, 2023Observed: 5.03 ft at 2:30AM Mar 23, 2023Observed: 5.03 ft at 2:45AM Mar 23, 2023Observed: 5.01 ft at 3:00AM Mar 23, 2023Observed: 4.98 ft at 3:15AM Mar 23, 2023Observed: 4.98 ft at 3:30AM Mar 23, 2023Observed: 4.98 ft at 3:45AM Mar 23, 2023Observed: 4.96 ft at 4:00AM Mar 23, 2023Observed: 4.93 ft at 4:15AM Mar 23, 2023Observed: 4.93 ft at 4:30AM Mar 23, 2023Observed: 4.91 ft at 4:45AM Mar 23, 2023Observed: 4.9 ft at 5:00AM Mar 23, 2023Observed: 4.89 ft at 5:15AM Mar 23, 2023Observed: 4.86 ft at 5:30AM Mar 23, 2023Observed: 4.86 ft at 5:45AM Mar 23, 2023Observed: 4.85 ft at 6:00AM Mar 23, 2023Observed: 4.85 ft at 6:15AM Mar 23, 2023Observed: 4.82 ft at 6:30AM Mar 23, 2023Observed: 4.81 ft at 6:45AM Mar 23, 2023Observed: 4.8 ft at 7:00AM Mar 23, 2023Observed: 4.79 ft at 7:15AM Mar 23, 2023Observed: 4.78 ft at 7:30AM Mar 23, 2023Observed: 4.76 ft at 7:45AM Mar 23, 2023Observed: 4.75 ft at 8:00AM Mar 23, 2023Observed: 4.74 ft at 8:15AM Mar 23, 2023Observed: 4.72 ft at 8:30AM Mar 23, 2023Observed: 4.72 ft at 8:45AM Mar 23, 2023Observed: 4.7 ft at 9:00AM Mar 23, 2023Observed: 4.68 ft at 9:15AM Mar 23, 2023Observed: 4.68 ft at 9:30AM Mar 23, 2023Observed: 4.68 ft at 9:45AM Mar 23, 2023Observed: 4.67 ft at 10:00AM Mar 23, 2023Observed: 4.65 ft at 10:15AM Mar 23, 2023Observed: 4.64 ft at 10:30AM Mar 23, 2023Observed: 4.63 ft at 10:45AM Mar 23, 2023Observed: 4.62 ft at 11:00AM Mar 23, 2023Observed: 4.59 ft at 11:15AM Mar 23, 2023Observed: 4.59 ft at 11:30AM Mar 23, 2023Observed: 4.57 ft at 11:45AM Mar 23, 2023Observed: 4.57 ft at 12:00PM Mar 23, 2023Observed: 4.57 ft at 12:15PM Mar 23, 2023Observed: 4.54 ft at 12:30PM Mar 23, 2023Observed: 4.54 ft at 12:45PM Mar 23, 2023Observed: 4.52 ft at 1:00PM Mar 23, 2023Observed: 4.52 ft at 1:15PM Mar 23, 2023Observed: 4.52 ft at 1:30PM Mar 23, 2023Observed: 4.5 ft at 1:45PM Mar 23, 2023Observed: 4.48 ft at 2:00PM Mar 23, 2023Observed: 4.47 ft at 2:15PM Mar 23, 2023Observed: 4.47 ft at 2:30PM Mar 23, 2023Observed: 4.44 ft at 2:45PM Mar 23, 2023Observed: 4.43 ft at 3:00PM Mar 23, 2023Observed: 4.43 ft at 3:15PM Mar 23, 2023Observed: 4.42 ft at 3:30PM Mar 23, 2023Highest Forecast: 4.4 ft 4:00PM Mar 23, 2023Highest Forecast: 4.4 ft 5:00PM Mar 23, 2023Forecast: 4.3 ft 6:00PM Mar 23, 2023Forecast: 4.3 ft 7:00PM Mar 23, 2023Forecast: 4.2 ft 8:00PM Mar 23, 2023Forecast: 4.2 ft 9:00PM Mar 23, 2023Forecast: 4.2 ft 10:00PM Mar 23, 2023Forecast: 4.1 ft 11:00PM Mar 23, 2023Forecast: 4.1 ft 12:00AM Mar 24, 2023Forecast: 4 ft 1:00AM Mar 24, 2023Forecast: 4 ft 2:00AM Mar 24, 2023Forecast: 4 ft 3:00AM Mar 24, 2023Forecast: 3.9 ft 4:00AM Mar 24, 2023Forecast: 3.9 ft 5:00AM Mar 24, 2023Forecast: 3.9 ft 6:00AM Mar 24, 2023Forecast: 3.9 ft 7:00AM Mar 24, 2023Forecast: 3.8 ft 8:00AM Mar 24, 2023Forecast: 3.8 ft 9:00AM Mar 24, 2023Forecast: 3.8 ft 10:00AM Mar 24, 2023Forecast: 3.8 ft 11:00AM Mar 24, 2023Forecast: 3.7 ft 12:00PM Mar 24, 2023Forecast: 3.7 ft 1:00PM Mar 24, 2023Forecast: 3.7 ft 2:00PM Mar 24, 2023Forecast: 3.7 ft 3:00PM Mar 24, 2023Forecast: 3.7 ft 4:00PM Mar 24, 2023Forecast: 3.7 ft 5:00PM Mar 24, 2023Forecast: 3.6 ft 6:00PM Mar 24, 2023Forecast: 3.6 ft 7:00PM Mar 24, 2023Forecast: 3.6 ft 8:00PM Mar 24, 2023Forecast: 3.6 ft 9:00PM Mar 24, 2023Forecast: 3.5 ft 10:00PM Mar 24, 2023Forecast: 3.5 ft 11:00PM Mar 24, 2023Forecast: 3.5 ft 12:00AM Mar 25, 2023Forecast: 3.5 ft 1:00AM Mar 25, 2023Forecast: 3.5 ft 2:00AM Mar 25, 2023Forecast: 3.4 ft 3:00AM Mar 25, 2023Forecast: 3.4 ft 4:00AM Mar 25, 2023Forecast: 3.4 ft 5:00AM Mar 25, 2023Forecast: 3.4 ft 6:00AM Mar 25, 2023Forecast: 3.3 ft 7:00AM Mar 25, 2023Forecast: 3.3 ft 8:00AM Mar 25, 2023Forecast: 3.3 ft 9:00AM Mar 25, 2023Forecast: 3.3 ft 10:00AM Mar 25, 2023Forecast: 3.3 ft 11:00AM Mar 25, 2023Forecast: 3.2 ft 12:00PM Mar 25, 2023Forecast: 3.2 ft 1:00PM Mar 25, 2023Forecast: 3.2 ft 2:00PM Mar 25, 2023Forecast: 3.2 ft 3:00PM Mar 25, 2023Forecast: 3.2 ft 4:00PM Mar 25, 2023Forecast: 3.2 ft 5:00PM Mar 25, 2023Forecast: 3.1 ft 6:00PM Mar 25, 2023Forecast: 3.1 ft 7:00PM Mar 25, 2023Forecast: 3.1 ft 8:00PM Mar 25, 2023Forecast: 3.1 ft 9:00PM Mar 25, 2023Forecast: 3.1 ft 10:00PM Mar 25, 2023Forecast: 3.1 ft 11:00PM Mar 25, 2023Forecast: 3 ft 12:00AM Mar 26, 2023Forecast: 3 ft 1:00AM Mar 26, 2023Forecast: 3 ft 2:00AM Mar 26, 2023Forecast: 3 ft 3:00AM Mar 26, 2023Forecast: 3 ft 4:00AM Mar 26, 2023Forecast: 3 ft 5:00AM Mar 26, 2023Forecast: 2.9 ft 6:00AM Mar 26, 2023Forecast: 2.9 ft 7:00AM Mar 26, 2023Forecast: 2.9 ft 8:00AM Mar 26, 2023Forecast: 2.9 ft 9:00AM Mar 26, 2023Forecast: 2.9 ft 10:00AM Mar 26, 2023Forecast: 2.9 ft 11:00AM Mar 26, 2023Forecast: 2.9 ft 12:00PM Mar 26, 2023Forecast: 2.9 ft 1:00PM Mar 26, 2023Forecast: 2.9 ft 2:00PM Mar 26, 2023Forecast: 2.8 ft 3:00PM Mar 26, 2023Forecast: 2.8 ft 4:00PM Mar 26, 2023Forecast: 2.8 ft 5:00PM Mar 26, 2023Forecast: 2.8 ft 6:00PM Mar 26, 2023Forecast: 2.8 ft 7:00PM Mar 26, 2023Forecast: 2.8 ft 8:00PM Mar 26, 2023Forecast: 2.8 ft 9:00PM Mar 26, 2023Forecast: 2.8 ft 10:00PM Mar 26, 2023Forecast: 2.7 ft 11:00PM Mar 26, 2023Forecast: 2.7 ft 12:00AM Mar 27, 2023Forecast: 2.7 ft 1:00AM Mar 27, 2023Forecast: 2.7 ft 2:00AM Mar 27, 2023Forecast: 2.7 ft 3:00AM Mar 27, 2023Forecast: 2.7 ft 4:00AM Mar 27, 2023Forecast: 2.7 ft 5:00AM Mar 27, 2023Forecast: 2.6 ft 6:00AM Mar 27, 2023Forecast: 2.6 ft 7:00AM Mar 27, 2023Forecast: 2.6 ft 8:00AM Mar 27, 2023Forecast: 2.6 ft 9:00AM Mar 27, 2023Forecast: 2.6 ft 10:00AM Mar 27, 2023Forecast: 2.6 ft 11:00AM Mar 27, 2023Forecast: 2.6 ft 12:00PM Mar 27, 2023Forecast: 2.6 ft 1:00PM Mar 27, 2023Forecast: 2.6 ft 2:00PM Mar 27, 2023Forecast: 2.5 ft 3:00PM Mar 27, 2023Forecast: 2.5 ft 4:00PM Mar 27, 2023Forecast: 2.5 ft 5:00PM Mar 27, 2023Forecast: 2.5 ft 6:00PM Mar 27, 2023Forecast: 2.5 ft 7:00PM Mar 27, 2023Forecast: 2.5 ft 8:00PM Mar 27, 2023Forecast: 2.5 ft 9:00PM Mar 27, 2023Forecast: 2.5 ft 10:00PM Mar 27, 2023Forecast: 2.5 ft 11:00PM Mar 27, 2023Forecast: 2.5 ft 12:00AM Mar 28, 2023Forecast: 2.5 ft 1:00AM Mar 28, 2023Forecast: 2.5 ft 2:00AM Mar 28, 2023Forecast: 2.5 ft 3:00AM Mar 28, 2023Forecast: 2.5 ft 4:00AM Mar 28, 2023Forecast: 2.6 ft 5:00AM Mar 28, 2023USGS--Water Resources of the United StatesSHEC1(plotting HGIRG) Graph Created (3:45PM Mar 23, 2023)ObservedForecast (issued 2:01PM Mar 23)Latest observed value: 4.42 ft at 3:30 PM PDT 23-Mar-2023. Flood Stage is 18 ft
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Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts for the Napa River near St. Helena are issued routinely year-round.
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Downstream Gauge Downstream Gauge - near Napa
Flood Categories (in feet)
Major Flood Stage: 22
Moderate Flood Stage: 20
Flood Stage: 18
Action Stage: 16
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
Zoom Level:16
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Gauge LocationGauge Map Marker
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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
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24 Disastrous Flooding. Widespread flooding across upper Napa Valley with travel essentially impossible. The peak water level during the flood of 12/31/2005 measured 23.6 feet.
22 Major Flood Stage. Major flooding throughout the upper Napa Valley with most roads inundated, making travel extremely difficult and unsafe.
20 Moderate Flood Stage. Moderate flooding of the lower portions of Silverado Trail along the reach. Inundation of low lying residential areas along the east river bank in the vicinity of Pope Street Bridge. Secondary and many primary roads inundated; most major cross roads inundated and unsafe to pass.
18 Minor Flood Stage. Minor flooding of low lying agricultural areas along river begins. Low lying rural residential areas immediately adjacent to the river and some secondary roads affected.
16 Monitor Stage. WFO Monterey may issue a Flood Watch-based products to cover Napa Valley regional flood potential at this stage.
About This Location Collapse

Latitude: 38.511297° N, Longitude: 122.455813° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 18 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 191.37 ft 209.37 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available 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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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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San Francisco Bay Area Weather Forecast Office
21 Grace Hopper Ave, Stop 5
Monterey, CA 93943-5505
(831) 656-1725
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