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Hydrograph River at a Glance Download
Napa River near St. Helena Stage (ft)Flow (kcfs)Highest Observation: 0.46 ft at 1:15PM Jun 16, 2018Observed: 0.45 ft at 1:30PM Jun 16, 2018Observed: 0.45 ft at 1:45PM Jun 16, 2018Highest Observation: 0.46 ft at 2:00PM Jun 16, 2018Highest Observation: 0.46 ft at 2:15PM Jun 16, 2018Observed: 0.45 ft at 2:30PM Jun 16, 2018Highest Observation: 0.46 ft at 2:45PM Jun 16, 2018Highest Observation: 0.46 ft at 3:00PM Jun 16, 2018Observed: 0.45 ft at 3:15PM Jun 16, 2018Highest Observation: 0.46 ft at 3:30PM Jun 16, 2018Highest Observation: 0.46 ft at 3:45PM Jun 16, 2018Highest Observation: 0.46 ft at 4:00PM Jun 16, 2018Highest Observation: 0.46 ft at 4:15PM Jun 16, 2018Highest Observation: 0.46 ft at 4:30PM Jun 16, 2018Observed: 0.45 ft at 4:45PM Jun 16, 2018Highest Observation: 0.46 ft at 5:00PM Jun 16, 2018Highest Observation: 0.46 ft at 5:15PM Jun 16, 2018Observed: 0.45 ft at 5:30PM Jun 16, 2018Highest Observation: 0.46 ft at 5:45PM Jun 16, 2018Observed: 0.45 ft at 6:00PM Jun 16, 2018Highest Observation: 0.46 ft at 6:15PM Jun 16, 2018Observed: 0.45 ft at 6:30PM Jun 16, 2018Observed: 0.45 ft at 6:45PM Jun 16, 2018Observed: 0.45 ft at 7:00PM Jun 16, 2018Observed: 0.45 ft at 7:15PM Jun 16, 2018Observed: 0.45 ft at 7:30PM Jun 16, 2018Highest Observation: 0.46 ft at 7:45PM Jun 16, 2018Observed: 0.45 ft at 8:00PM Jun 16, 2018Observed: 0.45 ft at 8:15PM Jun 16, 2018Highest Observation: 0.46 ft at 8:30PM Jun 16, 2018Observed: 0.45 ft at 8:45PM Jun 16, 2018Observed: 0.45 ft at 9:00PM Jun 16, 2018Observed: 0.45 ft at 9:15PM Jun 16, 2018Observed: 0.45 ft at 9:30PM Jun 16, 2018Observed: 0.45 ft at 9:45PM Jun 16, 2018Observed: 0.45 ft at 10:00PM Jun 16, 2018Observed: 0.45 ft at 10:15PM Jun 16, 2018Observed: 0.45 ft at 10:30PM Jun 16, 2018Observed: 0.45 ft at 10:45PM Jun 16, 2018Observed: 0.44 ft at 11:00PM Jun 16, 2018Observed: 0.45 ft at 11:15PM Jun 16, 2018Observed: 0.45 ft at 11:30PM Jun 16, 2018Observed: 0.44 ft at 11:45PM Jun 16, 2018Observed: 0.45 ft at 12:00AM Jun 17, 2018Observed: 0.45 ft at 12:15AM Jun 17, 2018Observed: 0.44 ft at 12:30AM Jun 17, 2018Observed: 0.45 ft at 12:45AM Jun 17, 2018Observed: 0.45 ft at 1:00AM Jun 17, 2018Observed: 0.44 ft at 1:15AM Jun 17, 2018Observed: 0.45 ft at 1:30AM Jun 17, 2018Observed: 0.45 ft at 1:45AM Jun 17, 2018Observed: 0.44 ft at 2:00AM Jun 17, 2018Observed: 0.45 ft at 2:15AM Jun 17, 2018Observed: 0.45 ft at 2:30AM Jun 17, 2018Observed: 0.44 ft at 2:45AM Jun 17, 2018Observed: 0.45 ft at 3:00AM Jun 17, 2018Observed: 0.44 ft at 3:15AM Jun 17, 2018Observed: 0.44 ft at 3:30AM Jun 17, 2018Observed: 0.45 ft at 3:45AM Jun 17, 2018Observed: 0.44 ft at 4:00AM Jun 17, 2018Observed: 0.44 ft at 4:15AM Jun 17, 2018Observed: 0.45 ft at 4:30AM Jun 17, 2018Observed: 0.44 ft at 4:45AM Jun 17, 2018Observed: 0.44 ft at 5:00AM Jun 17, 2018Observed: 0.44 ft at 5:15AM Jun 17, 2018Observed: 0.44 ft at 5:30AM Jun 17, 2018Observed: 0.45 ft at 5:45AM Jun 17, 2018Observed: 0.44 ft at 6:00AM Jun 17, 2018Observed: 0.44 ft at 6:15AM Jun 17, 2018Observed: 0.45 ft at 6:30AM Jun 17, 2018Observed: 0.44 ft at 6:45AM Jun 17, 2018Observed: 0.44 ft at 7:00AM Jun 17, 2018Observed: 0.45 ft at 7:15AM Jun 17, 2018Observed: 0.45 ft at 7:30AM Jun 17, 2018Observed: 0.45 ft at 7:45AM Jun 17, 2018Observed: 0.45 ft at 8:00AM Jun 17, 2018Observed: 0.45 ft at 8:15AM Jun 17, 2018Observed: 0.45 ft at 8:30AM Jun 17, 2018Highest Observation: 0.46 ft at 8:45AM Jun 17, 2018Observed: 0.45 ft at 9:00AM Jun 17, 2018Observed: 0.45 ft at 9:15AM Jun 17, 2018Highest Observation: 0.46 ft at 9:30AM Jun 17, 2018Highest Observation: 0.46 ft at 9:45AM Jun 17, 2018Highest Observation: 0.46 ft at 10:00AM Jun 17, 2018Observed: 0.45 ft at 10:15AM Jun 17, 2018Observed: 0.45 ft at 10:30AM Jun 17, 2018Highest Observation: 0.46 ft at 10:45AM Jun 17, 2018Highest Observation: 0.46 ft at 11:00AM Jun 17, 2018Observed: 0.45 ft at 11:15AM Jun 17, 2018Observed: 0.45 ft at 11:30AM Jun 17, 2018Highest Observation: 0.46 ft at 11:45AM Jun 17, 2018Highest Observation: 0.46 ft at 12:00PM Jun 17, 2018Observed: 0.45 ft at 12:15PM Jun 17, 2018Observed: 0.45 ft at 12:30PM Jun 17, 2018Highest Observation: 0.46 ft at 12:45PM Jun 17, 2018Highest Observation: 0.46 ft at 1:00PM Jun 17, 2018Observed: 0.45 ft at 1:15PM Jun 17, 2018Observed: 0.45 ft at 1:30PM Jun 17, 2018Highest Observation: 0.46 ft at 1:45PM Jun 17, 2018Highest Observation: 0.46 ft at 2:00PM Jun 17, 2018Observed: 0.45 ft at 2:15PM Jun 17, 2018Highest Observation: 0.46 ft at 2:30PM Jun 17, 2018Highest Observation: 0.46 ft at 2:45PM Jun 17, 2018Highest Observation: 0.46 ft at 3:00PM Jun 17, 2018Observed: 0.45 ft at 3:15PM Jun 17, 2018Highest Observation: 0.46 ft at 3:30PM Jun 17, 2018Highest Observation: 0.46 ft at 3:45PM Jun 17, 2018Observed: 0.45 ft at 4:00PM Jun 17, 2018Highest Observation: 0.46 ft at 4:15PM Jun 17, 2018Highest Observation: 0.46 ft at 4:30PM Jun 17, 2018Observed: 0.45 ft at 4:45PM Jun 17, 2018Highest Observation: 0.46 ft at 5:00PM Jun 17, 2018Highest Observation: 0.46 ft at 5:15PM Jun 17, 2018Observed: 0.45 ft at 5:30PM Jun 17, 2018Highest Observation: 0.46 ft at 5:45PM Jun 17, 2018Observed: 0.45 ft at 6:00PM Jun 17, 2018Highest Observation: 0.46 ft at 6:15PM Jun 17, 2018Highest Observation: 0.46 ft at 6:30PM Jun 17, 2018Observed: 0.45 ft at 6:45PM Jun 17, 2018Highest Observation: 0.46 ft at 7:00PM Jun 17, 2018Observed: 0.45 ft at 7:15PM Jun 17, 2018Observed: 0.45 ft at 7:30PM Jun 17, 2018Highest Observation: 0.46 ft at 7:45PM Jun 17, 2018Observed: 0.45 ft at 8:00PM Jun 17, 2018Observed: 0.45 ft at 8:15PM Jun 17, 2018Highest Observation: 0.46 ft at 8:30PM Jun 17, 2018Observed: 0.45 ft at 8:45PM Jun 17, 2018Observed: 0.45 ft at 9:00PM Jun 17, 2018Highest Observation: 0.46 ft at 9:15PM Jun 17, 2018Observed: 0.45 ft at 9:30PM Jun 17, 2018Observed: 0.45 ft at 9:45PM Jun 17, 2018Observed: 0.45 ft at 10:00PM Jun 17, 2018Observed: 0.45 ft at 10:15PM Jun 17, 2018Observed: 0.45 ft at 10:30PM Jun 17, 2018Observed: 0.45 ft at 10:45PM Jun 17, 2018Observed: 0.45 ft at 11:00PM Jun 17, 2018Observed: 0.45 ft at 11:15PM Jun 17, 2018Observed: 0.45 ft at 11:30PM Jun 17, 2018Observed: 0.45 ft at 11:45PM Jun 17, 2018Observed: 0.44 ft at 12:00AM Jun 18, 2018Observed: 0.45 ft at 12:15AM Jun 18, 2018Observed: 0.44 ft at 12:30AM Jun 18, 2018Observed: 0.45 ft at 12:45AM Jun 18, 2018Observed: 0.45 ft at 1:00AM Jun 18, 2018Observed: 0.44 ft at 1:15AM Jun 18, 2018Observed: 0.45 ft at 1:30AM Jun 18, 2018Observed: 0.44 ft at 1:45AM Jun 18, 2018Observed: 0.44 ft at 2:00AM Jun 18, 2018Observed: 0.44 ft at 2:15AM Jun 18, 2018Observed: 0.45 ft at 2:30AM Jun 18, 2018Observed: 0.45 ft at 2:45AM Jun 18, 2018Observed: 0.44 ft at 3:00AM Jun 18, 2018Observed: 0.45 ft at 3:15AM Jun 18, 2018Observed: 0.44 ft at 3:30AM Jun 18, 2018Observed: 0.44 ft at 3:45AM Jun 18, 2018Observed: 0.45 ft at 4:00AM Jun 18, 2018Observed: 0.44 ft at 4:15AM Jun 18, 2018Observed: 0.45 ft at 4:30AM Jun 18, 2018Observed: 0.45 ft at 4:45AM Jun 18, 2018Observed: 0.45 ft at 5:00AM Jun 18, 2018Observed: 0.45 ft at 5:15AM Jun 18, 2018Observed: 0.45 ft at 5:30AM Jun 18, 2018Observed: 0.44 ft at 5:45AM Jun 18, 2018Observed: 0.45 ft at 6:00AM Jun 18, 2018Observed: 0.45 ft at 6:15AM Jun 18, 2018Observed: 0.45 ft at 6:30AM Jun 18, 2018Observed: 0.45 ft at 6:45AM Jun 18, 2018Observed: 0.45 ft at 7:00AM Jun 18, 2018Observed: 0.45 ft at 7:15AM Jun 18, 2018Observed: 0.45 ft at 7:30AM Jun 18, 2018Observed: 0.45 ft at 7:45AM Jun 18, 2018Observed: 0.45 ft at 8:00AM Jun 18, 2018Highest Observation: 0.46 ft at 8:15AM Jun 18, 2018Highest Observation: 0.46 ft at 8:30AM Jun 18, 2018Observed: 0.45 ft at 8:45AM Jun 18, 2018Observed: 0.45 ft at 9:00AM Jun 18, 2018Highest Observation: 0.46 ft at 9:15AM Jun 18, 2018Highest Observation: 0.46 ft at 9:30AM Jun 18, 2018Observed: 0.45 ft at 9:45AM Jun 18, 2018Observed: 0.45 ft at 10:00AM Jun 18, 2018Highest Observation: 0.46 ft at 10:15AM Jun 18, 2018Highest Observation: 0.46 ft at 10:30AM Jun 18, 2018Highest Observation: 0.46 ft at 10:45AM Jun 18, 2018Observed: 0.45 ft at 11:00AM Jun 18, 2018Highest Observation: 0.46 ft at 11:15AM Jun 18, 2018Highest Observation: 0.46 ft at 11:30AM Jun 18, 2018Highest Observation: 0.46 ft at 11:45AM Jun 18, 2018Highest Observation: 0.46 ft at 12:00PM Jun 18, 2018Observed: 0.45 ft at 12:15PM Jun 18, 2018Highest Observation: 0.46 ft at 12:30PM Jun 18, 2018Highest Observation: 0.46 ft at 12:45PM Jun 18, 2018Highest Observation: 0.46 ft at 1:00PM Jun 18, 2018Highest Observation: 0.46 ft at 1:15PM Jun 18, 2018Highest Observation: 0.46 ft at 1:30PM Jun 18, 2018Highest Observation: 0.46 ft at 1:45PM Jun 18, 2018Observed: 0.45 ft at 2:00PM Jun 18, 2018Highest Observation: 0.46 ft at 2:15PM Jun 18, 2018Highest Observation: 0.46 ft at 2:30PM Jun 18, 2018Observed: 0.45 ft at 2:45PM Jun 18, 2018Highest Observation: 0.46 ft at 3:00PM Jun 18, 2018Highest Observation: 0.46 ft at 3:15PM Jun 18, 2018Observed: 0.45 ft at 3:30PM Jun 18, 2018Highest Observation: 0.46 ft at 3:45PM Jun 18, 2018Highest Observation: 0.46 ft at 4:00PM Jun 18, 2018Observed: 0.45 ft at 4:15PM Jun 18, 2018Highest Observation: 0.46 ft at 4:30PM Jun 18, 2018Highest Observation: 0.46 ft at 4:45PM Jun 18, 2018Observed: 0.45 ft at 5:00PM Jun 18, 2018Highest Observation: 0.46 ft at 5:15PM Jun 18, 2018Observed: 0.45 ft at 5:30PM Jun 18, 2018Highest Observation: 0.46 ft at 5:45PM Jun 18, 2018Observed: 0.45 ft at 6:00PM Jun 18, 2018Observed: 0.45 ft at 6:15PM Jun 18, 2018Observed: 0.45 ft at 6:30PM Jun 18, 2018Observed: 0.45 ft at 6:45PM Jun 18, 2018Observed: 0.45 ft at 7:00PM Jun 18, 2018Observed: 0.45 ft at 7:15PM Jun 18, 2018Observed: 0.45 ft at 7:30PM Jun 18, 2018Observed: 0.45 ft at 7:45PM Jun 18, 2018Observed: 0.45 ft at 8:00PM Jun 18, 2018Observed: 0.45 ft at 8:15PM Jun 18, 2018Observed: 0.45 ft at 8:30PM Jun 18, 2018Observed: 0.45 ft at 8:45PM Jun 18, 2018Observed: 0.45 ft at 9:00PM Jun 18, 2018Observed: 0.45 ft at 9:15PM Jun 18, 2018Observed: 0.45 ft at 9:30PM Jun 18, 2018Observed: 0.45 ft at 9:45PM Jun 18, 2018Observed: 0.45 ft at 10:00PM Jun 18, 2018Observed: 0.45 ft at 10:15PM Jun 18, 2018Observed: 0.45 ft at 10:30PM Jun 18, 2018Observed: 0.45 ft at 10:45PM Jun 18, 2018Observed: 0.45 ft at 11:00PM Jun 18, 2018Observed: 0.45 ft at 11:15PM Jun 18, 2018Observed: 0.44 ft at 11:30PM Jun 18, 2018Observed: 0.45 ft at 11:45PM Jun 18, 2018Observed: 0.44 ft at 12:00AM Jun 19, 2018Observed: 0.44 ft at 12:15AM Jun 19, 2018Observed: 0.45 ft at 12:30AM Jun 19, 2018Observed: 0.44 ft at 12:45AM Jun 19, 2018Observed: 0.44 ft at 1:00AM Jun 19, 2018Observed: 0.45 ft at 1:15AM Jun 19, 2018Observed: 0.44 ft at 1:30AM Jun 19, 2018Observed: 0.44 ft at 1:45AM Jun 19, 2018Observed: 0.45 ft at 2:00AM Jun 19, 2018Observed: 0.44 ft at 2:15AM Jun 19, 2018Observed: 0.44 ft at 2:30AM Jun 19, 2018Observed: 0.45 ft at 2:45AM Jun 19, 2018Observed: 0.44 ft at 3:00AM Jun 19, 2018Observed: 0.45 ft at 3:15AM Jun 19, 2018Observed: 0.45 ft at 3:30AM Jun 19, 2018Observed: 0.44 ft at 3:45AM Jun 19, 2018Observed: 0.45 ft at 4:00AM Jun 19, 2018Observed: 0.44 ft at 4:15AM Jun 19, 2018Observed: 0.44 ft at 4:30AM Jun 19, 2018Observed: 0.45 ft at 4:45AM Jun 19, 2018Observed: 0.44 ft at 5:00AM Jun 19, 2018Observed: 0.44 ft at 5:15AM Jun 19, 2018Observed: 0.45 ft at 5:30AM Jun 19, 2018Observed: 0.44 ft at 5:45AM Jun 19, 2018Observed: 0.44 ft at 6:00AM Jun 19, 2018Observed: 0.45 ft at 6:15AM Jun 19, 2018Observed: 0.44 ft at 6:30AM Jun 19, 2018Observed: 0.45 ft at 7:00AM Jun 19, 2018Observed: 0.45 ft at 7:15AM Jun 19, 2018Observed: 0.45 ft at 7:30AM Jun 19, 2018Observed: 0.45 ft at 7:45AM Jun 19, 2018Observed: 0.44 ft at 8:00AM Jun 19, 2018Observed: 0.44 ft at 8:15AM Jun 19, 2018Observed: 0.45 ft at 8:30AM Jun 19, 2018Observed: 0.45 ft at 8:45AM Jun 19, 2018Observed: 0.44 ft at 9:00AM Jun 19, 2018Observed: 0.45 ft at 9:15AM Jun 19, 2018Observed: 0.45 ft at 9:30AM Jun 19, 2018Observed: 0.45 ft at 9:45AM Jun 19, 2018Observed: 0.44 ft at 10:00AM Jun 19, 2018Observed: 0.45 ft at 10:15AM Jun 19, 2018Observed: 0.45 ft at 10:30AM Jun 19, 2018Observed: 0.45 ft at 10:45AM Jun 19, 2018Observed: 0.45 ft at 11:00AM Jun 19, 2018Observed: 0.45 ft at 11:15AM Jun 19, 2018Observed: 0.45 ft at 11:30AM Jun 19, 2018Observed: 0.45 ft at 11:45AM Jun 19, 2018Observed: 0.45 ft at 12:00PM Jun 19, 2018Observed: 0.44 ft at 12:15PM Jun 19, 2018Observed: 0.45 ft at 12:30PM Jun 19, 2018Observed: 0.45 ft at 12:45PM Jun 19, 2018Highest Forecast: 0.4 ft 2:00PM Jun 19, 2018Highest Forecast: 0.4 ft 3:00PM Jun 19, 2018Highest Forecast: 0.4 ft 4:00PM Jun 19, 2018Highest Forecast: 0.4 ft 5:00PM Jun 19, 2018Highest Forecast: 0.4 ft 6:00PM Jun 19, 2018Highest Forecast: 0.4 ft 7:00PM Jun 19, 2018Highest Forecast: 0.4 ft 8:00PM Jun 19, 2018Highest Forecast: 0.4 ft 9:00PM Jun 19, 2018Highest Forecast: 0.4 ft 10:00PM Jun 19, 2018Highest Forecast: 0.4 ft 11:00PM Jun 19, 2018Highest Forecast: 0.4 ft 12:00AM Jun 20, 2018Highest Forecast: 0.4 ft 1:00AM Jun 20, 2018Highest Forecast: 0.4 ft 2:00AM Jun 20, 2018Highest Forecast: 0.4 ft 3:00AM Jun 20, 2018Highest Forecast: 0.4 ft 4:00AM Jun 20, 2018Highest Forecast: 0.4 ft 5:00AM Jun 20, 2018Highest Forecast: 0.4 ft 6:00AM Jun 20, 2018Highest Forecast: 0.4 ft 7:00AM Jun 20, 2018Highest Forecast: 0.4 ft 8:00AM Jun 20, 2018Highest Forecast: 0.4 ft 9:00AM Jun 20, 2018Highest Forecast: 0.4 ft 10:00AM Jun 20, 2018Highest Forecast: 0.4 ft 11:00AM Jun 20, 2018Highest Forecast: 0.4 ft 12:00PM Jun 20, 2018Highest Forecast: 0.4 ft 1:00PM Jun 20, 2018Highest Forecast: 0.4 ft 2:00PM Jun 20, 2018Highest Forecast: 0.4 ft 3:00PM Jun 20, 2018Highest Forecast: 0.4 ft 4:00PM Jun 20, 2018Highest Forecast: 0.4 ft 5:00PM Jun 20, 2018Highest Forecast: 0.4 ft 6:00PM Jun 20, 2018Highest Forecast: 0.4 ft 7:00PM Jun 20, 2018Highest Forecast: 0.4 ft 8:00PM Jun 20, 2018Highest Forecast: 0.4 ft 9:00PM Jun 20, 2018Highest Forecast: 0.4 ft 10:00PM Jun 20, 2018Highest Forecast: 0.4 ft 11:00PM Jun 20, 2018Highest Forecast: 0.4 ft 12:00AM Jun 21, 2018Highest Forecast: 0.4 ft 1:00AM Jun 21, 2018Highest Forecast: 0.4 ft 2:00AM Jun 21, 2018Highest Forecast: 0.4 ft 3:00AM Jun 21, 2018Highest Forecast: 0.4 ft 4:00AM Jun 21, 2018Highest Forecast: 0.4 ft 5:00AM Jun 21, 2018Highest Forecast: 0.4 ft 6:00AM Jun 21, 2018Highest Forecast: 0.4 ft 7:00AM Jun 21, 2018Highest Forecast: 0.4 ft 8:00AM Jun 21, 2018Highest Forecast: 0.4 ft 9:00AM Jun 21, 2018Highest Forecast: 0.4 ft 10:00AM Jun 21, 2018Highest Forecast: 0.4 ft 11:00AM Jun 21, 2018Highest Forecast: 0.4 ft 12:00PM Jun 21, 2018Highest Forecast: 0.4 ft 1:00PM Jun 21, 2018Highest Forecast: 0.4 ft 2:00PM Jun 21, 2018Highest Forecast: 0.4 ft 3:00PM Jun 21, 2018Highest Forecast: 0.4 ft 4:00PM Jun 21, 2018Highest Forecast: 0.4 ft 5:00PM Jun 21, 2018Highest Forecast: 0.4 ft 6:00PM Jun 21, 2018Highest Forecast: 0.4 ft 7:00PM Jun 21, 2018Highest Forecast: 0.4 ft 8:00PM Jun 21, 2018Highest Forecast: 0.4 ft 9:00PM Jun 21, 2018Highest Forecast: 0.4 ft 10:00PM Jun 21, 2018Highest Forecast: 0.4 ft 11:00PM Jun 21, 2018Highest Forecast: 0.4 ft 12:00AM Jun 22, 2018Highest Forecast: 0.4 ft 1:00AM Jun 22, 2018Highest Forecast: 0.4 ft 2:00AM Jun 22, 2018Highest Forecast: 0.4 ft 3:00AM Jun 22, 2018Highest Forecast: 0.4 ft 4:00AM Jun 22, 2018Highest Forecast: 0.4 ft 5:00AM Jun 22, 2018Highest Forecast: 0.4 ft 6:00AM Jun 22, 2018Highest Forecast: 0.4 ft 7:00AM Jun 22, 2018Highest Forecast: 0.4 ft 8:00AM Jun 22, 2018Highest Forecast: 0.4 ft 9:00AM Jun 22, 2018Highest Forecast: 0.4 ft 10:00AM Jun 22, 2018Highest Forecast: 0.4 ft 11:00AM Jun 22, 2018Highest Forecast: 0.4 ft 12:00PM Jun 22, 2018Highest Forecast: 0.4 ft 1:00PM Jun 22, 2018Highest Forecast: 0.4 ft 2:00PM Jun 22, 2018Highest Forecast: 0.4 ft 3:00PM Jun 22, 2018Highest Forecast: 0.4 ft 4:00PM Jun 22, 2018Highest Forecast: 0.4 ft 5:00PM Jun 22, 2018Highest Forecast: 0.4 ft 6:00PM Jun 22, 2018Highest Forecast: 0.4 ft 7:00PM Jun 22, 2018Highest Forecast: 0.4 ft 8:00PM Jun 22, 2018Highest Forecast: 0.4 ft 9:00PM Jun 22, 2018Highest Forecast: 0.4 ft 10:00PM Jun 22, 2018Highest Forecast: 0.4 ft 11:00PM Jun 22, 2018Highest Forecast: 0.4 ft 12:00AM Jun 23, 2018Highest Forecast: 0.4 ft 1:00AM Jun 23, 2018Highest Forecast: 0.4 ft 2:00AM Jun 23, 2018Highest Forecast: 0.4 ft 3:00AM Jun 23, 2018Highest Forecast: 0.4 ft 4:00AM Jun 23, 2018Highest Forecast: 0.4 ft 5:00AM Jun 23, 2018Highest Forecast: 0.4 ft 6:00AM Jun 23, 2018Highest Forecast: 0.4 ft 7:00AM Jun 23, 2018Highest Forecast: 0.4 ft 8:00AM Jun 23, 2018Highest Forecast: 0.4 ft 9:00AM Jun 23, 2018Highest Forecast: 0.4 ft 10:00AM Jun 23, 2018Highest Forecast: 0.4 ft 11:00AM Jun 23, 2018Highest Forecast: 0.4 ft 12:00PM Jun 23, 2018Highest Forecast: 0.4 ft 1:00PM Jun 23, 2018Highest Forecast: 0.4 ft 2:00PM Jun 23, 2018Highest Forecast: 0.4 ft 3:00PM Jun 23, 2018Highest Forecast: 0.4 ft 4:00PM Jun 23, 2018Highest Forecast: 0.4 ft 5:00PM Jun 23, 2018Highest Forecast: 0.4 ft 6:00PM Jun 23, 2018Highest Forecast: 0.4 ft 7:00PM Jun 23, 2018Highest Forecast: 0.4 ft 8:00PM Jun 23, 2018Highest Forecast: 0.4 ft 9:00PM Jun 23, 2018Highest Forecast: 0.4 ft 10:00PM Jun 23, 2018Highest Forecast: 0.4 ft 11:00PM Jun 23, 2018Highest Forecast: 0.4 ft 12:00AM Jun 24, 2018Highest Forecast: 0.4 ft 1:00AM Jun 24, 2018Highest Forecast: 0.4 ft 2:00AM Jun 24, 2018Highest Forecast: 0.4 ft 3:00AM Jun 24, 2018Highest Forecast: 0.4 ft 4:00AM Jun 24, 2018Highest Forecast: 0.4 ft 5:00AM Jun 24, 2018USGS--Water Resources of the United StatesSHEC1(plotting HGIRG) Graph Created (1:00PM Jun 19, 2018)ObservedForecast (issued 7:47AM Jun 19)Latest observed value: 0.45 ft at 12:45 PM PDT 19-Jun-2018. Flood Stage is 18 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
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
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
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: 38.511389° 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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