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Hydrograph River at a Glance Download
Napa River at Downtown Napa Stage (ft)Observed: 5.44 ft at 9:16AM May 14, 2024Observed: 5.34 ft at 9:22AM May 14, 2024Observed: 5.23 ft at 9:28AM May 14, 2024Observed: 2.69 ft at 11:46AM May 14, 2024Observed: 2.59 ft at 11:50AM May 14, 2024Observed: 2.47 ft at 11:56AM May 14, 2024Observed: 2.35 ft at 12:02PM May 14, 2024Observed: 2.24 ft at 12:08PM May 14, 2024Observed: 2.14 ft at 12:12PM May 14, 2024Observed: 1.69 ft at 12:32PM May 14, 2024Observed: 1.59 ft at 12:38PM May 14, 2024Observed: 1.47 ft at 12:42PM May 14, 2024Observed: 0.26 ft at 2:36PM May 14, 2024Observed: 0.37 ft at 2:42PM May 14, 2024Observed: 1.15 ft at 3:16PM May 14, 2024Observed: 1.27 ft at 3:20PM May 14, 2024Observed: 1.39 ft at 3:26PM May 14, 2024Observed: 1.87 ft at 3:46PM May 14, 2024Observed: 1.99 ft at 3:50PM May 14, 2024Observed: 2.1 ft at 3:56PM May 14, 2024Observed: 2.22 ft at 4:00PM May 14, 2024Observed: 2.33 ft at 4:06PM May 14, 2024Observed: 2.44 ft at 4:10PM May 14, 2024Observed: 2.88 ft at 4:32PM May 14, 2024Observed: 2.98 ft at 4:38PM May 14, 2024Observed: 3.1 ft at 4:46PM May 14, 2024Observed: 3.21 ft at 4:52PM May 14, 2024Observed: 3.31 ft at 5:00PM May 14, 2024Observed: 3.35 ft at 5:02PM May 14, 2024Observed: 3.46 ft at 5:10PM May 14, 2024Observed: 3.57 ft at 5:18PM May 14, 2024Observed: 3.68 ft at 5:26PM May 14, 2024Observed: 4.32 ft at 6:18PM May 14, 2024Observed: 4.43 ft at 6:26PM May 14, 2024Observed: 4.95 ft at 7:06PM May 14, 2024Observed: 5.05 ft at 7:12PM May 14, 2024Observed: 5.68 ft at 8:00PM May 14, 2024Observed: 5.78 ft at 8:10PM May 14, 2024Observed: 5.99 ft at 8:30PM May 14, 2024Observed: 6.1 ft at 8:42PM May 14, 2024Observed: 6.51 ft at 11:12PM May 14, 2024Observed: 5.64 ft at 12:16AM May 15, 2024Observed: 5.53 ft at 12:24AM May 15, 2024Observed: 5.42 ft at 12:30AM May 15, 2024Observed: 5.32 ft at 12:38AM May 15, 2024Observed: 5.22 ft at 12:44AM May 15, 2024Observed: 5 ft at 1:00AM May 15, 2024Observed: 4.9 ft at 1:06AM May 15, 2024Observed: 4.79 ft at 1:14AM May 15, 2024Observed: 3.95 ft at 2:20AM May 15, 2024Observed: 3.85 ft at 2:36AM May 15, 2024Observed: 4.17 ft at 4:34AM May 15, 2024Observed: 4.28 ft at 4:42AM May 15, 2024Observed: 5.51 ft at 6:22AM May 15, 2024Observed: 5.72 ft at 6:46AM May 15, 2024Observed: 5.82 ft at 7:00AM May 15, 2024Observed: 5.92 ft at 7:14AM May 15, 2024Observed: 5.7 ft at 9:50AM May 15, 2024Observed: 5.6 ft at 9:56AM May 15, 2024Observed: 3.95 ft at 11:32AM May 15, 2024Observed: 3.85 ft at 11:38AM May 15, 2024Observed: 3.74 ft at 11:44AM May 15, 2024Observed: 3.63 ft at 11:52AM May 15, 2024Observed: 1.28 ft at 2:02PM May 15, 2024Observed: 1.18 ft at 2:08PM May 15, 2024Observed: 1.92 ft at 4:20PM May 15, 2024Observed: 2.03 ft at 4:26PM May 15, 2024Observed: 2.73 ft at 5:02PM May 15, 2024Observed: 2.84 ft at 5:10PM May 15, 2024Observed: 5.72 ft at 8:48PM May 15, 2024Observed: 5.83 ft at 8:58PM May 15, 2024Observed: 6.03 ft at 9:18PM May 15, 2024Observed: 6.14 ft at 9:28PM May 15, 2024Observed: 6.35 ft at 9:52PM May 15, 2024Observed: 3.87 ft at 3:02AM May 16, 2024Observed: 3.76 ft at 3:12AM May 16, 2024Observed: 3.66 ft at 3:24AM May 16, 2024Observed: 3.35 ft at 4:08AM May 16, 2024Observed: 4.94 ft at 7:06AM May 16, 2024Observed: 5.04 ft at 7:16AM May 16, 2024Observed: 5.15 ft at 7:26AM May 16, 2024Observed: 5.25 ft at 7:38AM May 16, 2024Observed: 5.36 ft at 7:48AM May 16, 2024Observed: 5.46 ft at 8:00AM May 16, 2024Observed: 5.57 ft at 8:12AM May 16, 2024Observed: 5.67 ft at 8:26AM May 16, 2024Observed: 5.78 ft at 8:42AM May 16, 2024Observed: 4.68 ft at 12:04PM May 16, 2024Observed: 4.57 ft at 12:10PM May 16, 2024Observed: 3.05 ft at 1:50PM May 16, 2024Observed: 2.94 ft at 1:58PM May 16, 2024Observed: 2.38 ft at 2:30PM May 16, 2024Observed: 2.26 ft at 2:38PM May 16, 2024Observed: 2.15 ft at 2:42PM May 16, 2024Observed: 1.4 ft at 4:30PM May 16, 2024Observed: 1.5 ft at 4:38PM May 16, 2024Observed: 1.61 ft at 4:44PM May 16, 2024Observed: 3.39 ft at 6:22PM May 16, 2024Observed: 3.5 ft at 6:32PM May 16, 2024Observed: 3.61 ft at 6:42PM May 16, 2024Observed: 3.82 ft at 7:00PM May 16, 2024Observed: 3.92 ft at 7:10PM May 16, 2024Observed: 4.78 ft at 8:16PM May 16, 2024Observed: 4.89 ft at 8:24PM May 16, 2024Observed: 6.56 ft at 12:32AM May 17, 2024Observed: 6.46 ft at 12:42AM May 17, 2024Observed: 5.7 ft at 1:32AM May 17, 2024Observed: 5.6 ft at 1:38AM May 17, 2024Observed: 5.49 ft at 1:44AM May 17, 2024Observed: 3.01 ft at 4:22AM May 17, 2024Observed: 2.59 ft at 5:00AM May 17, 2024Observed: 2.57 ft at 5:02AM May 17, 2024Observed: 2.47 ft at 5:14AM May 17, 2024Observed: 2.36 ft at 5:26AM May 17, 2024Observed: 2.47 ft at 6:04AM May 17, 2024Observed: 2.58 ft at 6:12AM May 17, 2024Observed: 2.68 ft at 6:18AM May 17, 2024Observed: 2.78 ft at 6:22AM May 17, 2024Observed: 2.88 ft at 6:28AM May 17, 2024Observed: 3 ft at 6:32AM May 17, 2024Observed: 3.12 ft at 6:38AM May 17, 2024Observed: 3.23 ft at 6:42AM May 17, 2024Observed: 4.53 ft at 8:10AM May 17, 2024Observed: 4.84 ft at 8:52AM May 17, 2024Observed: 5.36 ft at 9:46AM May 17, 2024Observed: 5.47 ft at 10:00AM May 17, 2024Observed: 5.58 ft at 10:14AM May 17, 2024Observed: 5.37 ft at 12:16PM May 17, 2024Observed: 5.27 ft at 12:24PM May 17, 2024Observed: 5.16 ft at 12:30PM May 17, 2024Observed: 5.05 ft at 12:38PM May 17, 2024Observed: 4.93 ft at 12:44PM May 17, 2024Observed: 4.58 ft at 1:04PM May 17, 2024Observed: 4.48 ft at 1:08PM May 17, 2024Observed: 4.38 ft at 1:14PM May 17, 2024Observed: 1.81 ft at 3:50PM May 17, 2024Observed: 1.71 ft at 3:56PM May 17, 2024Observed: 4.29 ft at 8:00PM May 17, 2024Observed: 4.39 ft at 8:10PM May 17, 2024Observed: 4.72 ft at 8:34PM May 17, 2024Observed: 4.83 ft at 8:42PM May 17, 2024Observed: 5.59 ft at 9:34PM May 17, 2024Observed: 5.7 ft at 9:42PM May 17, 2024Observed: 6.77 ft at 11:26PM May 17, 2024Observed: 6.77 ft at 1:10AM May 18, 2024Observed: 6.44 ft at 1:36AM May 18, 2024Observed: 6.33 ft at 1:44AM May 18, 2024Observed: 6.22 ft at 1:50AM May 18, 2024Observed: 6.11 ft at 1:56AM May 18, 2024Observed: 5.67 ft at 2:20AM May 18, 2024Observed: 5.56 ft at 2:26AM May 18, 2024Observed: 2.86 ft at 5:02AM May 18, 2024Observed: 2.75 ft at 5:10AM May 18, 2024Observed: 2.64 ft at 5:18AM May 18, 2024Observed: 2.53 ft at 5:24AM May 18, 2024Observed: 2.2 ft at 5:48AM May 18, 2024Observed: 2.09 ft at 5:56AM May 18, 2024Observed: 2.54 ft at 7:18AM May 18, 2024Observed: 2.65 ft at 7:22AM May 18, 2024Observed: 2.76 ft at 7:26AM May 18, 2024Observed: 3.86 ft at 8:16AM May 18, 2024Observed: 3.96 ft at 8:24AM May 18, 2024Observed: 4.07 ft at 8:32AM May 18, 2024Observed: 4.17 ft at 8:40AM May 18, 2024Observed: 4.27 ft at 8:52AM May 18, 2024Observed: 4.79 ft at 9:50AM May 18, 2024Observed: 5.42 ft at 10:46AM May 18, 2024Observed: 5.52 ft at 10:56AM May 18, 2024Observed: 5.73 ft at 11:18AM May 18, 2024Observed: 5.83 ft at 11:34AM May 18, 2024Observed: 4.96 ft at 2:00PM May 18, 2024Observed: 4.86 ft at 2:06PM May 18, 2024Observed: 4.75 ft at 2:12PM May 18, 2024Observed: 2.14 ft at 6:08PM May 18, 2024Observed: 2.24 ft at 6:14PM May 18, 2024Observed: 2.92 ft at 6:48PM May 18, 2024Observed: 3.15 ft at 7:00PM May 18, 2024Observed: 3.26 ft at 7:06PM May 18, 2024Observed: 3.38 ft at 7:12PM May 18, 2024Observed: 6.69 ft at 11:20PM May 18, 2024Highest Observation: 7.11 ft at 12:18AM May 19, 2024Observed: 6.69 ft at 2:02AM May 19, 2024Observed: 6.58 ft at 2:10AM May 19, 2024Observed: 5.89 ft at 2:46AM May 19, 2024Observed: 5.77 ft at 2:52AM May 19, 2024Observed: 5.65 ft at 2:58AM May 19, 2024Observed: 5.32 ft at 3:16AM May 19, 2024Observed: 5.21 ft at 3:22AM May 19, 2024Observed: 5.11 ft at 3:28AM May 19, 2024Observed: 1.17 ft at 7:06AM May 19, 2024Observed: 1.38 ft at 7:48AM May 19, 2024Observed: 1.5 ft at 7:54AM May 19, 2024Observed: 1.61 ft at 7:58AM May 19, 2024Napa CountyNCNC1(plotting HGIRR) Graph Created (9:00AM May 19, 2024)ObservedLatest observed value: 1.61 ft at 7:58 AM PDT 19-May-2024.
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NOTE: Graphical forecasts are not available for the Napa River at Downtown Napa. During times of high water, forecast crest information can be found in the text products.
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Flood Categories (in feet)
Not Available

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.
About This Location Collapse

Latitude: 38.297500° N, Longitude: 122.282800° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available 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 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  
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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.
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