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Hydrograph River at a Glance Download
Napa River near St. Helena Stage (ft)Flow (kcfs)Observed: 0.58 ft at 6:30PM May 11, 2021Observed: 0.58 ft at 6:45PM May 11, 2021Observed: 0.58 ft at 7:00PM May 11, 2021Observed: 0.58 ft at 7:15PM May 11, 2021Observed: 0.58 ft at 7:30PM May 11, 2021Observed: 0.58 ft at 7:45PM May 11, 2021Observed: 0.58 ft at 8:00PM May 11, 2021Observed: 0.58 ft at 8:15PM May 11, 2021Observed: 0.58 ft at 8:30PM May 11, 2021Observed: 0.57 ft at 8:45PM May 11, 2021Observed: 0.58 ft at 9:00PM May 11, 2021Observed: 0.58 ft at 9:15PM May 11, 2021Observed: 0.58 ft at 9:30PM May 11, 2021Observed: 0.58 ft at 9:45PM May 11, 2021Observed: 0.58 ft at 10:00PM May 11, 2021Observed: 0.58 ft at 10:15PM May 11, 2021Observed: 0.58 ft at 10:30PM May 11, 2021Observed: 0.57 ft at 10:45PM May 11, 2021Observed: 0.58 ft at 11:00PM May 11, 2021Observed: 0.58 ft at 11:15PM May 11, 2021Observed: 0.57 ft at 11:30PM May 11, 2021Observed: 0.58 ft at 11:45PM May 11, 2021Observed: 0.58 ft at 12:00AM May 12, 2021Observed: 0.58 ft at 12:15AM May 12, 2021Observed: 0.58 ft at 12:30AM May 12, 2021Observed: 0.58 ft at 12:45AM May 12, 2021Observed: 0.58 ft at 1:00AM May 12, 2021Observed: 0.59 ft at 1:15AM May 12, 2021Observed: 0.58 ft at 1:30AM May 12, 2021Observed: 0.58 ft at 1:45AM May 12, 2021Observed: 0.59 ft at 2:00AM May 12, 2021Observed: 0.59 ft at 2:15AM May 12, 2021Observed: 0.58 ft at 2:30AM May 12, 2021Observed: 0.59 ft at 2:45AM May 12, 2021Observed: 0.59 ft at 3:00AM May 12, 2021Observed: 0.58 ft at 3:15AM May 12, 2021Observed: 0.59 ft at 3:30AM May 12, 2021Observed: 0.59 ft at 3:45AM May 12, 2021Observed: 0.58 ft at 4:00AM May 12, 2021Observed: 0.59 ft at 4:15AM May 12, 2021Observed: 0.58 ft at 4:30AM May 12, 2021Observed: 0.58 ft at 4:45AM May 12, 2021Observed: 0.59 ft at 5:00AM May 12, 2021Observed: 0.59 ft at 5:15AM May 12, 2021Observed: 0.59 ft at 5:30AM May 12, 2021Observed: 0.59 ft at 5:45AM May 12, 2021Observed: 0.59 ft at 6:00AM May 12, 2021Observed: 0.58 ft at 6:15AM May 12, 2021Observed: 0.59 ft at 6:30AM May 12, 2021Observed: 0.59 ft at 6:45AM May 12, 2021Observed: 0.59 ft at 7:00AM May 12, 2021Observed: 0.59 ft at 7:15AM May 12, 2021Observed: 0.59 ft at 7:30AM May 12, 2021Observed: 0.58 ft at 7:45AM May 12, 2021Observed: 0.59 ft at 8:00AM May 12, 2021Observed: 0.59 ft at 8:15AM May 12, 2021Observed: 0.58 ft at 8:30AM May 12, 2021Observed: 0.59 ft at 8:45AM May 12, 2021Observed: 0.58 ft at 9:00AM May 12, 2021Observed: 0.58 ft at 9:15AM May 12, 2021Observed: 0.59 ft at 9:30AM May 12, 2021Observed: 0.59 ft at 9:45AM May 12, 2021Observed: 0.58 ft at 10:00AM May 12, 2021Observed: 0.58 ft at 10:15AM May 12, 2021Observed: 0.59 ft at 10:30AM May 12, 2021Observed: 0.58 ft at 10:45AM May 12, 2021Observed: 0.58 ft at 11:00AM May 12, 2021Observed: 0.58 ft at 11:15AM May 12, 2021Observed: 0.58 ft at 11:30AM May 12, 2021Observed: 0.58 ft at 11:45AM May 12, 2021Observed: 0.58 ft at 12:00PM May 12, 2021Observed: 0.58 ft at 12:15PM May 12, 2021Observed: 0.57 ft at 12:30PM May 12, 2021Observed: 0.58 ft at 12:45PM May 12, 2021Observed: 0.58 ft at 1:00PM May 12, 2021Observed: 0.57 ft at 1:15PM May 12, 2021Observed: 0.58 ft at 1:30PM May 12, 2021Observed: 0.57 ft at 1:45PM May 12, 2021Observed: 0.57 ft at 2:00PM May 12, 2021Observed: 0.58 ft at 2:15PM May 12, 2021Observed: 0.57 ft at 2:30PM May 12, 2021Observed: 0.57 ft at 2:45PM May 12, 2021Observed: 0.57 ft at 3:00PM May 12, 2021Observed: 0.57 ft at 3:15PM May 12, 2021Observed: 0.57 ft at 3:30PM May 12, 2021Observed: 0.57 ft at 3:45PM May 12, 2021Observed: 0.57 ft at 4:00PM May 12, 2021Observed: 0.57 ft at 4:15PM May 12, 2021Observed: 0.57 ft at 4:30PM May 12, 2021Observed: 0.57 ft at 4:45PM May 12, 2021Observed: 0.57 ft at 5:00PM May 12, 2021Observed: 0.56 ft at 5:15PM May 12, 2021Observed: 0.57 ft at 5:30PM May 12, 2021Observed: 0.56 ft at 5:45PM May 12, 2021Observed: 0.57 ft at 6:00PM May 12, 2021Observed: 0.57 ft at 6:15PM May 12, 2021Observed: 0.57 ft at 6:30PM May 12, 2021Observed: 0.57 ft at 6:45PM May 12, 2021Observed: 0.56 ft at 7:00PM May 12, 2021Observed: 0.57 ft at 7:15PM May 12, 2021Observed: 0.56 ft at 7:30PM May 12, 2021Observed: 0.57 ft at 7:45PM May 12, 2021Observed: 0.56 ft at 8:00PM May 12, 2021Observed: 0.56 ft at 8:15PM May 12, 2021Observed: 0.57 ft at 8:30PM May 12, 2021Observed: 0.56 ft at 8:45PM May 12, 2021Observed: 0.56 ft at 9:00PM May 12, 2021Observed: 0.57 ft at 9:15PM May 12, 2021Observed: 0.56 ft at 9:30PM May 12, 2021Observed: 0.56 ft at 9:45PM May 12, 2021Observed: 0.57 ft at 10:00PM May 12, 2021Observed: 0.56 ft at 10:15PM May 12, 2021Observed: 0.57 ft at 10:30PM May 12, 2021Observed: 0.57 ft at 10:45PM May 12, 2021Observed: 0.57 ft at 11:00PM May 12, 2021Observed: 0.57 ft at 11:15PM May 12, 2021Observed: 0.56 ft at 11:30PM May 12, 2021Observed: 0.56 ft at 11:45PM May 12, 2021Observed: 0.56 ft at 12:00AM May 13, 2021Observed: 0.56 ft at 12:15AM May 13, 2021Observed: 0.56 ft at 12:30AM May 13, 2021Observed: 0.55 ft at 12:45AM May 13, 2021Observed: 0.56 ft at 1:00AM May 13, 2021Observed: 0.56 ft at 1:15AM May 13, 2021Observed: 0.55 ft at 1:30AM May 13, 2021Observed: 0.56 ft at 1:45AM May 13, 2021Observed: 0.56 ft at 2:00AM May 13, 2021Observed: 0.55 ft at 2:15AM May 13, 2021Observed: 0.55 ft at 2:30AM May 13, 2021Observed: 0.55 ft at 2:45AM May 13, 2021Observed: 0.55 ft at 3:00AM May 13, 2021Observed: 0.55 ft at 3:15AM May 13, 2021Observed: 0.55 ft at 3:30AM May 13, 2021Observed: 0.55 ft at 3:45AM May 13, 2021Observed: 0.55 ft at 4:00AM May 13, 2021Observed: 0.55 ft at 4:15AM May 13, 2021Observed: 0.55 ft at 4:30AM May 13, 2021Observed: 0.55 ft at 4:45AM May 13, 2021Observed: 0.55 ft at 5:00AM May 13, 2021Observed: 0.54 ft at 5:15AM May 13, 2021Observed: 0.55 ft at 5:30AM May 13, 2021Observed: 0.55 ft at 5:45AM May 13, 2021Observed: 0.54 ft at 6:00AM May 13, 2021Observed: 0.55 ft at 6:15AM May 13, 2021Observed: 0.55 ft at 6:30AM May 13, 2021Observed: 0.54 ft at 6:45AM May 13, 2021Observed: 0.55 ft at 7:00AM May 13, 2021Observed: 0.55 ft at 7:15AM May 13, 2021Observed: 0.54 ft at 7:30AM May 13, 2021Observed: 0.55 ft at 7:45AM May 13, 2021Observed: 0.54 ft at 8:00AM May 13, 2021Observed: 0.54 ft at 8:15AM May 13, 2021Observed: 0.55 ft at 8:30AM May 13, 2021Observed: 0.55 ft at 8:45AM May 13, 2021Observed: 0.54 ft at 9:00AM May 13, 2021Observed: 0.55 ft at 9:15AM May 13, 2021Observed: 0.55 ft at 9:30AM May 13, 2021Observed: 0.54 ft at 9:45AM May 13, 2021Observed: 0.54 ft at 10:00AM May 13, 2021Observed: 0.55 ft at 10:15AM May 13, 2021Observed: 0.55 ft at 10:30AM May 13, 2021Observed: 0.55 ft at 10:45AM May 13, 2021Observed: 0.55 ft at 11:00AM May 13, 2021Observed: 0.55 ft at 11:15AM May 13, 2021Observed: 0.55 ft at 11:30AM May 13, 2021Observed: 0.55 ft at 11:45AM May 13, 2021Observed: 0.55 ft at 12:00PM May 13, 2021Observed: 0.55 ft at 12:15PM May 13, 2021Observed: 0.55 ft at 12:30PM May 13, 2021Observed: 0.56 ft at 12:45PM May 13, 2021Observed: 0.56 ft at 1:00PM May 13, 2021Observed: 0.55 ft at 1:15PM May 13, 2021Observed: 0.56 ft at 1:30PM May 13, 2021Observed: 0.56 ft at 1:45PM May 13, 2021Observed: 0.56 ft at 2:00PM May 13, 2021Observed: 0.56 ft at 2:15PM May 13, 2021Observed: 0.57 ft at 2:30PM May 13, 2021Observed: 0.57 ft at 2:45PM May 13, 2021Observed: 0.56 ft at 3:00PM May 13, 2021Observed: 0.57 ft at 3:15PM May 13, 2021Observed: 0.57 ft at 3:30PM May 13, 2021Observed: 0.57 ft at 3:45PM May 13, 2021Observed: 0.57 ft at 4:00PM May 13, 2021Observed: 0.57 ft at 4:15PM May 13, 2021Observed: 0.57 ft at 4:30PM May 13, 2021Observed: 0.57 ft at 4:45PM May 13, 2021Observed: 0.58 ft at 5:00PM May 13, 2021Observed: 0.57 ft at 5:15PM May 13, 2021Observed: 0.57 ft at 5:30PM May 13, 2021Observed: 0.57 ft at 5:45PM May 13, 2021Observed: 0.57 ft at 6:00PM May 13, 2021Observed: 0.58 ft at 6:15PM May 13, 2021Observed: 0.57 ft at 6:30PM May 13, 2021Observed: 0.57 ft at 6:45PM May 13, 2021Observed: 0.57 ft at 7:00PM May 13, 2021Observed: 0.57 ft at 7:15PM May 13, 2021Observed: 0.58 ft at 7:30PM May 13, 2021Observed: 0.57 ft at 7:45PM May 13, 2021Observed: 0.57 ft at 8:00PM May 13, 2021Observed: 0.58 ft at 8:15PM May 13, 2021Observed: 0.57 ft at 8:30PM May 13, 2021Observed: 0.57 ft at 8:45PM May 13, 2021Observed: 0.58 ft at 9:00PM May 13, 2021Observed: 0.57 ft at 9:15PM May 13, 2021Observed: 0.57 ft at 9:30PM May 13, 2021Observed: 0.58 ft at 9:45PM May 13, 2021Observed: 0.57 ft at 10:00PM May 13, 2021Observed: 0.57 ft at 10:15PM May 13, 2021Observed: 0.58 ft at 10:30PM May 13, 2021Observed: 0.58 ft at 10:45PM May 13, 2021Observed: 0.57 ft at 11:00PM May 13, 2021Observed: 0.58 ft at 11:15PM May 13, 2021Observed: 0.58 ft at 11:30PM May 13, 2021Observed: 0.57 ft at 11:45PM May 13, 2021Observed: 0.58 ft at 12:00AM May 14, 2021Observed: 0.58 ft at 12:15AM May 14, 2021Observed: 0.58 ft at 12:30AM May 14, 2021Observed: 0.58 ft at 12:45AM May 14, 2021Observed: 0.58 ft at 1:00AM May 14, 2021Observed: 0.58 ft at 1:15AM May 14, 2021Observed: 0.58 ft at 1:30AM May 14, 2021Observed: 0.58 ft at 1:45AM May 14, 2021Observed: 0.57 ft at 2:00AM May 14, 2021Observed: 0.57 ft at 2:15AM May 14, 2021Observed: 0.57 ft at 2:30AM May 14, 2021Observed: 0.57 ft at 2:45AM May 14, 2021Observed: 0.57 ft at 3:00AM May 14, 2021Observed: 0.57 ft at 3:15AM May 14, 2021Observed: 0.57 ft at 3:30AM May 14, 2021Observed: 0.58 ft at 3:45AM May 14, 2021Observed: 0.58 ft at 4:00AM May 14, 2021Observed: 0.58 ft at 4:15AM May 14, 2021Observed: 0.58 ft at 4:30AM May 14, 2021Observed: 0.58 ft at 4:45AM May 14, 2021Observed: 0.58 ft at 5:00AM May 14, 2021Observed: 0.58 ft at 5:15AM May 14, 2021Observed: 0.58 ft at 5:30AM May 14, 2021Observed: 0.57 ft at 5:45AM May 14, 2021Observed: 0.58 ft at 6:00AM May 14, 2021Observed: 0.57 ft at 6:15AM May 14, 2021Observed: 0.57 ft at 6:30AM May 14, 2021Observed: 0.58 ft at 6:45AM May 14, 2021Observed: 0.57 ft at 7:00AM May 14, 2021Observed: 0.57 ft at 7:15AM May 14, 2021Observed: 0.57 ft at 7:30AM May 14, 2021Observed: 0.57 ft at 7:45AM May 14, 2021Observed: 0.58 ft at 8:00AM May 14, 2021Observed: 0.58 ft at 8:15AM May 14, 2021Observed: 0.57 ft at 8:30AM May 14, 2021Observed: 0.57 ft at 8:45AM May 14, 2021Observed: 0.58 ft at 9:00AM May 14, 2021Observed: 0.58 ft at 9:15AM May 14, 2021Observed: 0.57 ft at 9:30AM May 14, 2021Observed: 0.58 ft at 9:45AM May 14, 2021Observed: 0.58 ft at 10:00AM May 14, 2021Observed: 0.58 ft at 10:15AM May 14, 2021Observed: 0.58 ft at 10:30AM May 14, 2021Observed: 0.58 ft at 10:45AM May 14, 2021Observed: 0.58 ft at 11:00AM May 14, 2021Observed: 0.58 ft at 11:15AM May 14, 2021Observed: 0.58 ft at 11:30AM May 14, 2021Observed: 0.58 ft at 11:45AM May 14, 2021Observed: 0.58 ft at 12:00PM May 14, 2021Observed: 0.58 ft at 12:15PM May 14, 2021Observed: 0.58 ft at 12:30PM May 14, 2021Observed: 0.58 ft at 12:45PM May 14, 2021Observed: 0.58 ft at 1:00PM May 14, 2021Observed: 0.58 ft at 1:15PM May 14, 2021Observed: 0.58 ft at 1:30PM May 14, 2021Observed: 0.58 ft at 1:45PM May 14, 2021Observed: 0.59 ft at 2:00PM May 14, 2021Observed: 0.58 ft at 2:15PM May 14, 2021Observed: 0.58 ft at 2:30PM May 14, 2021Observed: 0.58 ft at 2:45PM May 14, 2021Observed: 0.58 ft at 3:00PM May 14, 2021Observed: 0.58 ft at 3:15PM May 14, 2021Observed: 0.59 ft at 3:30PM May 14, 2021Observed: 0.58 ft at 3:45PM May 14, 2021Observed: 0.58 ft at 4:00PM May 14, 2021Observed: 0.59 ft at 4:15PM May 14, 2021Observed: 0.58 ft at 4:30PM May 14, 2021Observed: 0.58 ft at 4:45PM May 14, 2021Observed: 0.59 ft at 5:00PM May 14, 2021Observed: 0.58 ft at 5:15PM May 14, 2021Observed: 0.59 ft at 5:30PM May 14, 2021Observed: 0.59 ft at 5:45PM May 14, 2021Observed: 0.58 ft at 6:00PM May 14, 2021Observed: 0.59 ft at 6:15PM May 14, 2021Observed: 0.59 ft at 6:30PM May 14, 2021Observed: 0.58 ft at 6:45PM May 14, 2021Observed: 0.59 ft at 7:00PM May 14, 2021Observed: 0.59 ft at 7:15PM May 14, 2021Observed: 0.58 ft at 7:30PM May 14, 2021Observed: 0.59 ft at 7:45PM May 14, 2021Observed: 0.59 ft at 8:00PM May 14, 2021Observed: 0.59 ft at 8:15PM May 14, 2021Observed: 0.59 ft at 8:30PM May 14, 2021Observed: 0.59 ft at 8:45PM May 14, 2021Observed: 0.59 ft at 9:00PM May 14, 2021Observed: 0.59 ft at 9:15PM May 14, 2021Observed: 0.59 ft at 9:30PM May 14, 2021Observed: 0.59 ft at 9:45PM May 14, 2021Observed: 0.59 ft at 10:00PM May 14, 2021Observed: 0.59 ft at 10:15PM May 14, 2021Observed: 0.6 ft at 10:30PM May 14, 2021Observed: 0.59 ft at 10:45PM May 14, 2021Observed: 0.59 ft at 11:00PM May 14, 2021Observed: 0.59 ft at 11:15PM May 14, 2021Observed: 0.59 ft at 11:30PM May 14, 2021Observed: 0.59 ft at 11:45PM May 14, 2021Observed: 0.59 ft at 12:00AM May 15, 2021Observed: 0.6 ft at 12:15AM May 15, 2021Observed: 0.59 ft at 12:30AM May 15, 2021Observed: 0.59 ft at 12:45AM May 15, 2021Observed: 0.59 ft at 1:00AM May 15, 2021Observed: 0.59 ft at 1:15AM May 15, 2021Observed: 0.58 ft at 1:30AM May 15, 2021Observed: 0.59 ft at 1:45AM May 15, 2021Observed: 0.59 ft at 2:00AM May 15, 2021Observed: 0.59 ft at 2:15AM May 15, 2021Observed: 0.6 ft at 2:30AM May 15, 2021Observed: 0.59 ft at 2:45AM May 15, 2021Observed: 0.59 ft at 3:00AM May 15, 2021Observed: 0.59 ft at 3:15AM May 15, 2021Observed: 0.58 ft at 3:30AM May 15, 2021Observed: 0.58 ft at 3:45AM May 15, 2021Observed: 0.59 ft at 4:00AM May 15, 2021Observed: 0.58 ft at 4:15AM May 15, 2021Observed: 0.58 ft at 4:30AM May 15, 2021Observed: 0.59 ft at 4:45AM May 15, 2021Observed: 0.58 ft at 5:00AM May 15, 2021Observed: 0.58 ft at 5:15AM May 15, 2021Observed: 0.58 ft at 5:30AM May 15, 2021Observed: 0.58 ft at 5:45AM May 15, 2021Observed: 0.58 ft at 6:00AM May 15, 2021Observed: 0.57 ft at 6:15AM May 15, 2021Observed: 0.58 ft at 6:30AM May 15, 2021Observed: 0.57 ft at 6:45AM May 15, 2021Observed: 0.57 ft at 7:00AM May 15, 2021Observed: 0.58 ft at 7:15AM May 15, 2021Observed: 0.57 ft at 7:30AM May 15, 2021Observed: 0.57 ft at 7:45AM May 15, 2021Observed: 0.58 ft at 8:00AM May 15, 2021Observed: 0.57 ft at 8:15AM May 15, 2021Observed: 0.57 ft at 8:30AM May 15, 2021Observed: 0.58 ft at 8:45AM May 15, 2021Observed: 0.58 ft at 9:00AM May 15, 2021Observed: 0.58 ft at 9:15AM May 15, 2021Observed: 0.58 ft at 9:30AM May 15, 2021Observed: 0.59 ft at 9:45AM May 15, 2021Observed: 0.59 ft at 10:00AM May 15, 2021Observed: 0.59 ft at 10:15AM May 15, 2021Observed: 0.59 ft at 10:30AM May 15, 2021Observed: 0.6 ft at 10:45AM May 15, 2021Observed: 0.6 ft at 11:00AM May 15, 2021Observed: 0.6 ft at 11:15AM May 15, 2021Observed: 0.6 ft at 11:30AM May 15, 2021Observed: 0.6 ft at 11:45AM May 15, 2021Observed: 0.61 ft at 12:00PM May 15, 2021Observed: 0.6 ft at 12:15PM May 15, 2021Observed: 0.6 ft at 12:30PM May 15, 2021Observed: 0.6 ft at 12:45PM May 15, 2021Observed: 0.61 ft at 1:00PM May 15, 2021Observed: 0.61 ft at 1:15PM May 15, 2021Observed: 0.61 ft at 1:30PM May 15, 2021Observed: 0.6 ft at 1:45PM May 15, 2021Observed: 0.61 ft at 2:00PM May 15, 2021Observed: 0.61 ft at 2:15PM May 15, 2021Observed: 0.61 ft at 2:30PM May 15, 2021Observed: 0.62 ft at 2:45PM May 15, 2021Observed: 0.61 ft at 3:00PM May 15, 2021Observed: 0.61 ft at 3:15PM May 15, 2021Observed: 0.62 ft at 3:30PM May 15, 2021Observed: 0.62 ft at 3:45PM May 15, 2021Observed: 0.61 ft at 4:00PM May 15, 2021Observed: 0.61 ft at 4:15PM May 15, 2021Observed: 0.62 ft at 4:30PM May 15, 2021Observed: 0.61 ft at 4:45PM May 15, 2021Observed: 0.61 ft at 5:00PM May 15, 2021Observed: 0.62 ft at 5:15PM May 15, 2021Observed: 0.61 ft at 5:30PM May 15, 2021Observed: 0.62 ft at 5:45PM May 15, 2021Observed: 0.61 ft at 6:00PM May 15, 2021Observed: 0.61 ft at 6:15PM May 15, 2021Observed: 0.62 ft at 6:30PM May 15, 2021Observed: 0.61 ft at 6:45PM May 15, 2021Observed: 0.61 ft at 7:00PM May 15, 2021Observed: 0.62 ft at 7:15PM May 15, 2021Observed: 0.61 ft at 7:30PM May 15, 2021Observed: 0.61 ft at 7:45PM May 15, 2021Observed: 0.61 ft at 8:00PM May 15, 2021Observed: 0.61 ft at 8:15PM May 15, 2021Observed: 0.61 ft at 8:30PM May 15, 2021Observed: 0.61 ft at 8:45PM May 15, 2021Observed: 0.61 ft at 9:00PM May 15, 2021Observed: 0.61 ft at 9:15PM May 15, 2021Observed: 0.61 ft at 9:30PM May 15, 2021Observed: 0.61 ft at 9:45PM May 15, 2021Observed: 0.61 ft at 10:00PM May 15, 2021Observed: 0.6 ft at 10:15PM May 15, 2021Observed: 0.61 ft at 10:30PM May 15, 2021Observed: 0.61 ft at 10:45PM May 15, 2021Observed: 0.6 ft at 11:00PM May 15, 2021Observed: 0.61 ft at 11:15PM May 15, 2021Observed: 0.6 ft at 11:30PM May 15, 2021Observed: 0.6 ft at 11:45PM May 15, 2021Observed: 0.61 ft at 12:00AM May 16, 2021Observed: 0.6 ft at 12:15AM May 16, 2021Observed: 0.6 ft at 12:30AM May 16, 2021Observed: 0.6 ft at 12:45AM May 16, 2021Observed: 0.6 ft at 1:00AM May 16, 2021Observed: 0.59 ft at 1:15AM May 16, 2021Observed: 0.59 ft at 1:30AM May 16, 2021Observed: 0.59 ft at 1:45AM May 16, 2021Observed: 0.59 ft at 2:00AM May 16, 2021Observed: 0.59 ft at 2:15AM May 16, 2021Observed: 0.6 ft at 2:30AM May 16, 2021Observed: 0.59 ft at 2:45AM May 16, 2021Observed: 0.59 ft at 3:00AM May 16, 2021Observed: 0.6 ft at 3:15AM May 16, 2021Observed: 0.6 ft at 3:30AM May 16, 2021Observed: 0.59 ft at 3:45AM May 16, 2021Observed: 0.6 ft at 4:00AM May 16, 2021Observed: 0.6 ft at 4:15AM May 16, 2021Observed: 0.6 ft at 4:30AM May 16, 2021Observed: 0.6 ft at 4:45AM May 16, 2021Observed: 0.6 ft at 5:00AM May 16, 2021Observed: 0.6 ft at 5:15AM May 16, 2021Observed: 0.61 ft at 5:30AM May 16, 2021Observed: 0.6 ft at 5:45AM May 16, 2021Observed: 0.6 ft at 6:00AM May 16, 2021Observed: 0.61 ft at 6:15AM May 16, 2021Observed: 0.6 ft at 6:30AM May 16, 2021Observed: 0.6 ft at 6:45AM May 16, 2021Observed: 0.61 ft at 7:00AM May 16, 2021Observed: 0.6 ft at 7:15AM May 16, 2021Observed: 0.6 ft at 7:30AM May 16, 2021Observed: 0.61 ft at 7:45AM May 16, 2021Observed: 0.6 ft at 8:00AM May 16, 2021Observed: 0.6 ft at 8:15AM May 16, 2021Observed: 0.6 ft at 8:30AM May 16, 2021Observed: 0.6 ft at 8:45AM May 16, 2021Observed: 0.6 ft at 9:00AM May 16, 2021Observed: 0.6 ft at 9:15AM May 16, 2021Observed: 0.6 ft at 9:30AM May 16, 2021Observed: 0.6 ft at 9:45AM May 16, 2021Observed: 0.6 ft at 10:00AM May 16, 2021Observed: 0.6 ft at 10:15AM May 16, 2021Observed: 0.61 ft at 10:30AM May 16, 2021Observed: 0.61 ft at 10:45AM May 16, 2021Observed: 0.61 ft at 11:00AM May 16, 2021Observed: 0.61 ft at 11:15AM May 16, 2021Observed: 0.61 ft at 11:30AM May 16, 2021Highest Observation: 0.63 ft at 11:45AM May 16, 2021Highest Observation: 0.63 ft at 12:00PM May 16, 2021Highest Observation: 0.63 ft at 12:15PM May 16, 2021Observed: 0.62 ft at 12:30PM May 16, 2021Highest Observation: 0.63 ft at 12:45PM May 16, 2021Highest Observation: 0.63 ft at 1:00PM May 16, 2021Highest Observation: 0.63 ft at 1:15PM May 16, 2021Observed: 0.62 ft at 1:30PM May 16, 2021Highest Observation: 0.63 ft at 1:45PM May 16, 2021Highest Observation: 0.63 ft at 2:00PM May 16, 2021Observed: 0.62 ft at 2:15PM May 16, 2021Highest Observation: 0.63 ft at 2:30PM May 16, 2021Highest Observation: 0.63 ft at 2:45PM May 16, 2021Observed: 0.62 ft at 3:00PM May 16, 2021Highest Observation: 0.63 ft at 3:15PM May 16, 2021Highest Observation: 0.63 ft at 3:30PM May 16, 2021Observed: 0.62 ft at 3:45PM May 16, 2021Highest Observation: 0.63 ft at 4:00PM May 16, 2021Highest Observation: 0.63 ft at 4:15PM May 16, 2021Observed: 0.62 ft at 4:30PM May 16, 2021Highest Observation: 0.63 ft at 4:45PM May 16, 2021Observed: 0.62 ft at 5:00PM May 16, 2021Observed: 0.62 ft at 5:15PM May 16, 2021Observed: 0.62 ft at 5:30PM May 16, 2021Observed: 0.62 ft at 5:45PM May 16, 2021Observed: 0.62 ft at 6:00PM May 16, 2021Highest Forecast: 0.6 ft 7:00PM May 16, 2021Highest Forecast: 0.6 ft 8:00PM May 16, 2021Highest Forecast: 0.6 ft 9:00PM May 16, 2021Highest Forecast: 0.6 ft 10:00PM May 16, 2021Highest Forecast: 0.6 ft 11:00PM May 16, 2021Highest Forecast: 0.6 ft 12:00AM May 17, 2021Highest Forecast: 0.6 ft 1:00AM May 17, 2021Highest Forecast: 0.6 ft 2:00AM May 17, 2021Highest Forecast: 0.6 ft 3:00AM May 17, 2021Highest Forecast: 0.6 ft 4:00AM May 17, 2021Highest Forecast: 0.6 ft 5:00AM May 17, 2021Highest Forecast: 0.6 ft 6:00AM May 17, 2021Highest Forecast: 0.6 ft 7:00AM May 17, 2021Highest Forecast: 0.6 ft 8:00AM May 17, 2021Highest Forecast: 0.6 ft 9:00AM May 17, 2021Highest Forecast: 0.6 ft 10:00AM May 17, 2021Highest Forecast: 0.6 ft 11:00AM May 17, 2021Highest Forecast: 0.6 ft 12:00PM May 17, 2021Highest Forecast: 0.6 ft 1:00PM May 17, 2021Highest Forecast: 0.6 ft 2:00PM May 17, 2021Highest Forecast: 0.6 ft 3:00PM May 17, 2021Highest Forecast: 0.6 ft 4:00PM May 17, 2021Highest Forecast: 0.6 ft 5:00PM May 17, 2021Highest Forecast: 0.6 ft 6:00PM May 17, 2021Highest Forecast: 0.6 ft 7:00PM May 17, 2021Highest Forecast: 0.6 ft 8:00PM May 17, 2021Highest Forecast: 0.6 ft 9:00PM May 17, 2021Highest Forecast: 0.6 ft 10:00PM May 17, 2021Highest Forecast: 0.6 ft 11:00PM May 17, 2021Highest Forecast: 0.6 ft 12:00AM May 18, 2021Highest Forecast: 0.6 ft 1:00AM May 18, 2021Highest Forecast: 0.6 ft 2:00AM May 18, 2021Highest Forecast: 0.6 ft 3:00AM May 18, 2021Highest Forecast: 0.6 ft 4:00AM May 18, 2021Highest Forecast: 0.6 ft 5:00AM May 18, 2021Highest Forecast: 0.6 ft 6:00AM May 18, 2021Highest Forecast: 0.6 ft 7:00AM May 18, 2021Highest Forecast: 0.6 ft 8:00AM May 18, 2021Highest Forecast: 0.6 ft 9:00AM May 18, 2021Highest Forecast: 0.6 ft 10:00AM May 18, 2021Highest Forecast: 0.6 ft 11:00AM May 18, 2021Highest Forecast: 0.6 ft 12:00PM May 18, 2021Highest Forecast: 0.6 ft 1:00PM May 18, 2021Highest Forecast: 0.6 ft 2:00PM May 18, 2021Highest Forecast: 0.6 ft 3:00PM May 18, 2021Highest Forecast: 0.6 ft 4:00PM May 18, 2021Highest Forecast: 0.6 ft 5:00PM May 18, 2021Highest Forecast: 0.6 ft 6:00PM May 18, 2021Highest Forecast: 0.6 ft 7:00PM May 18, 2021Highest Forecast: 0.6 ft 8:00PM May 18, 2021Highest Forecast: 0.6 ft 9:00PM May 18, 2021Highest Forecast: 0.6 ft 10:00PM May 18, 2021Highest Forecast: 0.6 ft 11:00PM May 18, 2021Highest Forecast: 0.6 ft 12:00AM May 19, 2021Highest Forecast: 0.6 ft 1:00AM May 19, 2021Highest Forecast: 0.6 ft 2:00AM May 19, 2021Highest Forecast: 0.6 ft 3:00AM May 19, 2021Highest Forecast: 0.6 ft 4:00AM May 19, 2021Highest Forecast: 0.6 ft 5:00AM May 19, 2021Highest Forecast: 0.6 ft 6:00AM May 19, 2021Highest Forecast: 0.6 ft 7:00AM May 19, 2021Highest Forecast: 0.6 ft 8:00AM May 19, 2021Highest Forecast: 0.6 ft 9:00AM May 19, 2021Highest Forecast: 0.6 ft 10:00AM May 19, 2021Highest Forecast: 0.6 ft 11:00AM May 19, 2021Highest Forecast: 0.6 ft 12:00PM May 19, 2021Highest Forecast: 0.6 ft 1:00PM May 19, 2021Highest Forecast: 0.6 ft 2:00PM May 19, 2021Highest Forecast: 0.6 ft 3:00PM May 19, 2021Highest Forecast: 0.6 ft 4:00PM May 19, 2021Highest Forecast: 0.6 ft 5:00PM May 19, 2021Highest Forecast: 0.6 ft 6:00PM May 19, 2021Highest Forecast: 0.6 ft 7:00PM May 19, 2021Highest Forecast: 0.6 ft 8:00PM May 19, 2021Highest Forecast: 0.6 ft 9:00PM May 19, 2021Highest Forecast: 0.6 ft 10:00PM May 19, 2021Highest Forecast: 0.6 ft 11:00PM May 19, 2021Highest Forecast: 0.6 ft 12:00AM May 20, 2021Highest Forecast: 0.6 ft 1:00AM May 20, 2021Highest Forecast: 0.6 ft 2:00AM May 20, 2021Highest Forecast: 0.6 ft 3:00AM May 20, 2021Highest Forecast: 0.6 ft 4:00AM May 20, 2021Highest Forecast: 0.6 ft 5:00AM May 20, 2021Highest Forecast: 0.6 ft 6:00AM May 20, 2021Highest Forecast: 0.6 ft 7:00AM May 20, 2021Highest Forecast: 0.6 ft 8:00AM May 20, 2021Highest Forecast: 0.6 ft 9:00AM May 20, 2021Highest Forecast: 0.6 ft 10:00AM May 20, 2021Highest Forecast: 0.6 ft 11:00AM May 20, 2021Highest Forecast: 0.6 ft 12:00PM May 20, 2021Highest Forecast: 0.6 ft 1:00PM May 20, 2021Highest Forecast: 0.6 ft 2:00PM May 20, 2021Highest Forecast: 0.6 ft 3:00PM May 20, 2021Highest Forecast: 0.6 ft 4:00PM May 20, 2021Highest Forecast: 0.6 ft 5:00PM May 20, 2021Highest Forecast: 0.6 ft 6:00PM May 20, 2021Highest Forecast: 0.6 ft 7:00PM May 20, 2021Highest Forecast: 0.6 ft 8:00PM May 20, 2021Highest Forecast: 0.6 ft 9:00PM May 20, 2021Highest Forecast: 0.6 ft 10:00PM May 20, 2021Highest Forecast: 0.6 ft 11:00PM May 20, 2021Highest Forecast: 0.6 ft 12:00AM May 21, 2021Highest Forecast: 0.6 ft 1:00AM May 21, 2021Highest Forecast: 0.6 ft 2:00AM May 21, 2021Highest Forecast: 0.6 ft 3:00AM May 21, 2021Highest Forecast: 0.6 ft 4:00AM May 21, 2021Highest Forecast: 0.6 ft 5:00AM May 21, 2021USGS--Water Resources of the United StatesSHEC1(plotting HGIRG) Graph Created (6:15PM May 16, 2021)ObservedForecast (issued 7:01AM May 16)Latest observed value: 0.62 ft at 6:00 PM PDT 16-May-2021. Flood Stage is 18 ft
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Tabular Data (UTC)
Tabular Data (PDT)
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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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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.
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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.
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Latitude: 38.511389° N, Longitude: 122.454722° 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 193.21 ft 209.71 ft 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
National Weather Service
San Francisco Bay Area Weather Forecast Office
21 Grace Hopper Ave, Stop 5
Monterey, CA 93943-5505
(831) 656-1725
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Page last modified: 2-Nov-2020 7:27 PM
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