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Hydrograph River at a Glance Download
Napa River at Brazos Drawbridge Stage (ft)Observed: 3.75 ft at 12:44AM Apr 14, 2024Observed: 3.96 ft at 1:40AM Apr 14, 2024Observed: 4.71 ft at 2:52AM Apr 14, 2024Observed: 4.82 ft at 3:00AM Apr 14, 2024Observed: 4.92 ft at 3:10AM Apr 14, 2024Observed: 5.13 ft at 3:30AM Apr 14, 2024Observed: 5.24 ft at 3:38AM Apr 14, 2024Highest Observation: 6.25 ft at 7:30AM Apr 14, 2024Observed: 6.14 ft at 7:40AM Apr 14, 2024Observed: 5.14 ft at 8:50AM Apr 14, 2024Observed: 5.03 ft at 8:56AM Apr 14, 2024Observed: 3.05 ft at 10:46AM Apr 14, 2024Observed: 2.95 ft at 10:50AM Apr 14, 2024Observed: 2.83 ft at 10:56AM Apr 14, 2024Observed: 2.72 ft at 11:02AM Apr 14, 2024Observed: 2.62 ft at 11:06AM Apr 14, 2024Observed: 2.51 ft at 11:12AM Apr 14, 2024Observed: 0.92 ft at 12:18PM Apr 14, 2024Observed: 0.81 ft at 12:22PM Apr 14, 2024Observed: 0.7 ft at 12:28PM Apr 14, 2024Observed: -0.07 ft at 1:06PM Apr 14, 2024Observed: -0.17 ft at 1:14PM Apr 14, 2024Observed: 3.85 ft at 6:22PM Apr 14, 2024Observed: 3.88 ft at 6:26PM Apr 14, 2024Observed: 4.19 ft at 6:50PM Apr 14, 2024Observed: 4.3 ft at 7:00PM Apr 14, 2024Observed: 4.4 ft at 7:08PM Apr 14, 2024Observed: 4.61 ft at 11:50PM Apr 14, 2024Observed: 4.29 ft at 12:22AM Apr 15, 2024Observed: 3.68 ft at 1:42AM Apr 15, 2024Observed: 4.2 ft at 3:48AM Apr 15, 2024Observed: 4.3 ft at 3:58AM Apr 15, 2024Observed: 5.48 ft at 5:50AM Apr 15, 2024Observed: 5.69 ft at 6:18AM Apr 15, 2024Observed: 5.74 ft at 6:26AM Apr 15, 2024Observed: 4.45 ft at 10:04AM Apr 15, 2024Observed: 4.34 ft at 10:12AM Apr 15, 2024Observed: 4.01 ft at 10:30AM Apr 15, 2024Observed: 3.91 ft at 10:36AM Apr 15, 2024Observed: 3.8 ft at 10:42AM Apr 15, 2024Observed: 1.92 ft at 12:18PM Apr 15, 2024Observed: 1.81 ft at 12:24PM Apr 15, 2024Observed: 1.7 ft at 12:28PM Apr 15, 2024Observed: 0.22 ft at 3:36PM Apr 15, 2024Observed: 0.33 ft at 3:44PM Apr 15, 2024Observed: 0.88 ft at 4:16PM Apr 15, 2024Observed: 0.99 ft at 4:22PM Apr 15, 2024Observed: 1.11 ft at 4:28PM Apr 15, 2024Observed: 3.08 ft at 6:34PM Apr 15, 2024Observed: 3.19 ft at 6:42PM Apr 15, 2024Observed: 3.29 ft at 6:52PM Apr 15, 2024Observed: 4.76 ft at 8:54PM Apr 15, 2024Observed: 4.87 ft at 9:04PM Apr 15, 2024Observed: 4.98 ft at 9:14PM Apr 15, 2024Observed: 5.29 ft at 11:40PM Apr 15, 2024Observed: 4.98 ft at 12:16AM Apr 16, 2024Observed: 4.88 ft at 12:26AM Apr 16, 2024Observed: 4.14 ft at 1:34AM Apr 16, 2024Observed: 4.04 ft at 1:44AM Apr 16, 2024Observed: 3.52 ft at 2:46AM Apr 16, 2024Observed: 3.63 ft at 4:38AM Apr 16, 2024Observed: 3.73 ft at 4:52AM Apr 16, 2024Observed: 3.84 ft at 5:02AM Apr 16, 2024Observed: 3.94 ft at 5:14AM Apr 16, 2024Observed: 4.15 ft at 5:36AM Apr 16, 2024Observed: 4.25 ft at 5:46AM Apr 16, 2024Observed: 4.35 ft at 5:56AM Apr 16, 2024Observed: 4.67 ft at 6:24AM Apr 16, 2024Observed: 4.69 ft at 6:26AM Apr 16, 2024Observed: 5.31 ft at 9:52AM Apr 16, 2024Observed: 3.15 ft at 12:18PM Apr 16, 2024Observed: 3.04 ft at 12:24PM Apr 16, 2024Observed: 2.28 ft at 1:04PM Apr 16, 2024Observed: 2.18 ft at 1:08PM Apr 16, 2024Observed: 2.07 ft at 1:14PM Apr 16, 2024Observed: 1.97 ft at 1:18PM Apr 16, 2024Observed: 1.86 ft at 1:24PM Apr 16, 2024Observed: 1.76 ft at 1:28PM Apr 16, 2024Observed: 0.34 ft at 4:22PM Apr 16, 2024Observed: 0.66 ft at 4:50PM Apr 16, 2024Observed: 0.77 ft at 4:58PM Apr 16, 2024Observed: 1.09 ft at 5:16PM Apr 16, 2024Observed: 1.2 ft at 5:22PM Apr 16, 2024Observed: 1.31 ft at 5:28PM Apr 16, 2024Observed: 1.41 ft at 5:34PM Apr 16, 2024Observed: 1.52 ft at 5:40PM Apr 16, 2024Observed: 1.63 ft at 5:46PM Apr 16, 2024Observed: 1.75 ft at 5:54PM Apr 16, 2024Observed: 2.81 ft at 7:04PM Apr 16, 2024Observed: 2.92 ft at 7:12PM Apr 16, 2024Observed: 3.25 ft at 7:36PM Apr 16, 2024Observed: 3.36 ft at 7:44PM Apr 16, 2024Observed: 3.79 ft at 8:16PM Apr 16, 2024Observed: 3.89 ft at 8:24PM Apr 16, 2024Observed: 4.63 ft at 9:20PM Apr 16, 2024Observed: 4.73 ft at 9:28PM Apr 16, 2024Observed: 5.27 ft at 10:18PM Apr 16, 2024Observed: 5.15 ft at 1:08AM Apr 17, 2024Observed: 5.04 ft at 1:16AM Apr 17, 2024Observed: 4.94 ft at 1:24AM Apr 17, 2024Observed: 4.84 ft at 1:32AM Apr 17, 2024Observed: 4.73 ft at 1:40AM Apr 17, 2024Observed: 3.24 ft at 5:52AM Apr 17, 2024Observed: 4.24 ft at 7:22AM Apr 17, 2024Observed: 4.35 ft at 7:32AM Apr 17, 2024Observed: 4.45 ft at 7:42AM Apr 17, 2024Observed: 3.4 ft at 1:16PM Apr 17, 2024Observed: 3.3 ft at 1:22PM Apr 17, 2024Observed: 3.19 ft at 1:28PM Apr 17, 2024Observed: 2.19 ft at 2:18PM Apr 17, 2024Observed: 2.09 ft at 2:22PM Apr 17, 2024Observed: 1.98 ft at 2:28PM Apr 17, 2024Observed: 0.35 ft at 5:04PM Apr 17, 2024Observed: 2.21 ft at 7:04PM Apr 17, 2024Observed: 2.33 ft at 7:12PM Apr 17, 2024Observed: 3.39 ft at 8:22PM Apr 17, 2024Observed: 4.38 ft at 9:30PM Apr 17, 2024Observed: 4.49 ft at 9:38PM Apr 17, 2024Observed: 4.59 ft at 9:46PM Apr 17, 2024Observed: 4.71 ft at 9:54PM Apr 17, 2024Observed: 5.23 ft at 10:36PM Apr 17, 2024Observed: 5.66 ft at 11:22PM Apr 17, 2024Observed: 5.76 ft at 11:38PM Apr 17, 2024Observed: 4.39 ft at 2:50AM Apr 18, 2024Observed: 4.29 ft at 2:58AM Apr 18, 2024Observed: 3.54 ft at 3:46AM Apr 18, 2024Observed: 3.43 ft at 3:54AM Apr 18, 2024Observed: 2.49 ft at 5:28AM Apr 18, 2024Observed: 2.83 ft at 6:36AM Apr 18, 2024Observed: 2.94 ft at 6:44AM Apr 18, 2024Observed: 3.16 ft at 7:02AM Apr 18, 2024Observed: 3.26 ft at 7:10AM Apr 18, 2024Observed: 5.39 ft at 10:14AM Apr 18, 2024Observed: 5.5 ft at 10:28AM Apr 18, 2024Observed: 4.86 ft at 1:02PM Apr 18, 2024Observed: 4.75 ft at 1:10PM Apr 18, 2024Observed: 4.64 ft at 1:18PM Apr 18, 2024Observed: 4.53 ft at 1:24PM Apr 18, 2024Observed: 2.51 ft at 3:20PM Apr 18, 2024Observed: 2.4 ft at 3:26PM Apr 18, 2024Observed: 1.19 ft at 4:30PM Apr 18, 2024Observed: 1.08 ft at 4:36PM Apr 18, 2024Observed: 0.97 ft at 4:44PM Apr 18, 2024Observed: 0.75 ft at 6:02PM Apr 18, 2024Observed: 0.86 ft at 6:12PM Apr 18, 2024Napa CountyNBDC1(plotting HGIRR) Graph Created (11:45PM Apr 18, 2024)ObservedLatest observed value: 0.86 ft at 6:12 PM PDT 18-Apr-2024.
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Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Graphical forecasts are not available for the Napa River at Brazos Drawbridge. 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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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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Latitude: 38.209200° N, Longitude: 122.306700° 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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