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Hydrograph River at a Glance Download
Napa River at Brazos Drawbridge Stage (ft)Observed: 2.26 ft at 11:32AM Apr 24, 2024Observed: 2.37 ft at 11:36AM Apr 24, 2024Observed: 2.49 ft at 11:42AM Apr 24, 2024Observed: 4.11 ft at 1:16PM Apr 24, 2024Observed: 4.21 ft at 1:22PM Apr 24, 2024Observed: 5.6 ft at 3:30PM Apr 24, 2024Observed: 5.49 ft at 5:10PM Apr 24, 2024Observed: 4.94 ft at 5:52PM Apr 24, 2024Observed: 4.84 ft at 5:58PM Apr 24, 2024Observed: 4.52 ft at 6:20PM Apr 24, 2024Observed: 4.43 ft at 6:26PM Apr 24, 2024Observed: 3.9 ft at 7:00PM Apr 24, 2024Observed: 3.78 ft at 7:06PM Apr 24, 2024Observed: 3.67 ft at 7:14PM Apr 24, 2024Observed: 2.71 ft at 8:22PM Apr 24, 2024Observed: 2.51 ft at 9:46PM Apr 24, 2024Observed: 2.62 ft at 9:54PM Apr 24, 2024Observed: 2.73 ft at 10:02PM Apr 24, 2024Observed: 2.84 ft at 10:10PM Apr 24, 2024Observed: 2.95 ft at 10:16PM Apr 24, 2024Observed: 3.06 ft at 10:22PM Apr 24, 2024Observed: 3.17 ft at 10:28PM Apr 24, 2024Observed: 4.82 ft at 5:48AM Apr 25, 2024Observed: 4.71 ft at 5:54AM Apr 25, 2024Observed: -0.09 ft at 9:32AM Apr 25, 2024Observed: -0.19 ft at 9:40AM Apr 25, 2024Observed: 1.44 ft at 11:46AM Apr 25, 2024Observed: 1.54 ft at 11:50AM Apr 25, 2024Observed: 1.67 ft at 11:56AM Apr 25, 2024Observed: 2.57 ft at 12:34PM Apr 25, 2024Observed: 2.68 ft at 12:40PM Apr 25, 2024Observed: 2.78 ft at 12:44PM Apr 25, 2024Observed: 2.9 ft at 12:50PM Apr 25, 2024Observed: 3.01 ft at 12:56PM Apr 25, 2024Observed: 3.11 ft at 1:02PM Apr 25, 2024Observed: 3.22 ft at 1:10PM Apr 25, 2024Observed: 4.82 ft at 6:34PM Apr 25, 2024Observed: 4.71 ft at 6:44PM Apr 25, 2024Observed: 2.99 ft at 8:54PM Apr 25, 2024Observed: 2.88 ft at 10:22PM Apr 25, 2024Observed: 3.42 ft at 11:00PM Apr 25, 2024Observed: 3.53 ft at 11:06PM Apr 25, 2024Observed: 3.63 ft at 11:12PM Apr 25, 2024Observed: 5.69 ft at 1:18AM Apr 26, 2024Observed: 5.79 ft at 1:26AM Apr 26, 2024Observed: 6.11 ft at 1:54AM Apr 26, 2024Observed: 5.59 ft at 5:34AM Apr 26, 2024Observed: 5.47 ft at 5:42AM Apr 26, 2024Observed: 3.71 ft at 7:18AM Apr 26, 2024Observed: 3.59 ft at 7:24AM Apr 26, 2024Observed: 2.83 ft at 8:02AM Apr 26, 2024Observed: 2.72 ft at 8:06AM Apr 26, 2024Observed: 2.6 ft at 8:12AM Apr 26, 2024Observed: 2.49 ft at 8:16AM Apr 26, 2024Observed: 2.37 ft at 8:22AM Apr 26, 2024Observed: 2.25 ft at 8:26AM Apr 26, 2024Observed: 1.36 ft at 9:00AM Apr 26, 2024Observed: 1.24 ft at 9:04AM Apr 26, 2024Observed: 1.13 ft at 9:08AM Apr 26, 2024Observed: 1.02 ft at 9:12AM Apr 26, 2024Observed: 5.24 ft at 4:56PM Apr 26, 2024Observed: 5.36 ft at 6:26PM Apr 26, 2024Observed: 4.3 ft at 8:06PM Apr 26, 2024Observed: 4.2 ft at 8:12PM Apr 26, 2024Observed: 3.88 ft at 8:36PM Apr 26, 2024Observed: 3.77 ft at 8:44PM Apr 26, 2024Observed: 3.24 ft at 9:32PM Apr 26, 2024Observed: 3.03 ft at 10:06PM Apr 26, 2024Observed: 4.33 ft at 12:16AM Apr 27, 2024Observed: 4.45 ft at 12:22AM Apr 27, 2024Observed: 6.16 ft at 5:20AM Apr 27, 2024Observed: 6.06 ft at 5:28AM Apr 27, 2024Observed: 5.18 ft at 6:20AM Apr 27, 2024Observed: 5.09 ft at 6:26AM Apr 27, 2024Observed: 4.44 ft at 7:02AM Apr 27, 2024Observed: 4.33 ft at 7:08AM Apr 27, 2024Observed: 4.22 ft at 7:14AM Apr 27, 2024Observed: 3.55 ft at 7:50AM Apr 27, 2024Observed: 3.44 ft at 7:56AM Apr 27, 2024Observed: 2.32 ft at 8:48AM Apr 27, 2024Observed: 2.22 ft at 8:52AM Apr 27, 2024Observed: 2.11 ft at 8:56AM Apr 27, 2024Observed: 0.68 ft at 9:48AM Apr 27, 2024Observed: 0.58 ft at 9:52AM Apr 27, 2024Observed: 0.48 ft at 9:56AM Apr 27, 2024Observed: -0.06 ft at 10:20AM Apr 27, 2024Observed: -0.18 ft at 10:26AM Apr 27, 2024Observed: -0.3 ft at 10:32AM Apr 27, 2024Observed: -0.42 ft at 10:38AM Apr 27, 2024Observed: -0.52 ft at 10:44AM Apr 27, 2024Observed: 1.37 ft at 1:18PM Apr 27, 2024Observed: 1.47 ft at 1:22PM Apr 27, 2024Observed: 1.57 ft at 1:26PM Apr 27, 2024Observed: 2.72 ft at 2:18PM Apr 27, 2024Observed: 2.82 ft at 2:24PM Apr 27, 2024Observed: 3.37 ft at 3:00PM Apr 27, 2024Observed: 3.48 ft at 3:08PM Apr 27, 2024Observed: 4.12 ft at 4:00PM Apr 27, 2024Observed: 4.23 ft at 4:10PM Apr 27, 2024Observed: 5.04 ft at 7:24PM Apr 27, 2024Observed: 3.97 ft at 9:04PM Apr 27, 2024Observed: 3.87 ft at 9:12PM Apr 27, 2024Observed: 3.88 ft at 12:20AM Apr 28, 2024Observed: 4.41 ft at 1:00AM Apr 28, 2024Observed: 4.52 ft at 1:06AM Apr 28, 2024Observed: 4.63 ft at 1:14AM Apr 28, 2024Observed: 4.84 ft at 1:30AM Apr 28, 2024Observed: 4.95 ft at 1:38AM Apr 28, 2024Observed: 5.05 ft at 1:46AM Apr 28, 2024Observed: 5.16 ft at 1:54AM Apr 28, 2024Observed: 5.48 ft at 2:20AM Apr 28, 2024Observed: 5.92 ft at 3:00AM Apr 28, 2024Observed: 6.03 ft at 3:12AM Apr 28, 2024Highest Observation: 6.23 ft at 5:36AM Apr 28, 2024Observed: 6.12 ft at 5:46AM Apr 28, 2024Observed: 6.02 ft at 5:54AM Apr 28, 2024Observed: 5.42 ft at 6:32AM Apr 28, 2024Observed: 5.3 ft at 6:40AM Apr 28, 2024Observed: 4.88 ft at 7:04AM Apr 28, 2024Observed: 4.78 ft at 7:10AM Apr 28, 2024Observed: 3.54 ft at 8:16AM Apr 28, 2024Observed: 3.43 ft at 8:22AM Apr 28, 2024Observed: 3.31 ft at 8:28AM Apr 28, 2024Observed: 0.42 ft at 1:30PM Apr 28, 2024Observed: 0.52 ft at 1:34PM Apr 28, 2024Observed: 0.62 ft at 1:38PM Apr 28, 2024Observed: 0.72 ft at 1:42PM Apr 28, 2024Observed: 0.85 ft at 1:48PM Apr 28, 2024Observed: 0.95 ft at 1:52PM Apr 28, 2024Observed: 1.05 ft at 1:56PM Apr 28, 2024Observed: 2.14 ft at 2:46PM Apr 28, 2024Observed: 2.25 ft at 2:52PM Apr 28, 2024Observed: 2.35 ft at 2:58PM Apr 28, 2024Observed: 3.31 ft at 4:08PM Apr 28, 2024Observed: 4.58 ft at 6:04PM Apr 28, 2024Observed: 4.84 ft at 8:18PM Apr 28, 2024Observed: 4.33 ft at 9:22PM Apr 28, 2024Observed: 4.22 ft at 9:34PM Apr 28, 2024Observed: 3.69 ft at 12:34AM Apr 29, 2024Observed: 3.79 ft at 12:44AM Apr 29, 2024Observed: 3.9 ft at 12:54AM Apr 29, 2024Observed: 5.79 ft at 3:38AM Apr 29, 2024Observed: 5.87 ft at 6:36AM Apr 29, 2024Observed: 5.76 ft at 6:44AM Apr 29, 2024Observed: 5 ft at 7:34AM Apr 29, 2024Observed: 4.89 ft at 7:42AM Apr 29, 2024Observed: 4.78 ft at 7:48AM Apr 29, 2024Observed: 4.67 ft at 7:56AM Apr 29, 2024Observed: 4.57 ft at 8:02AM Apr 29, 2024Observed: 4.46 ft at 8:08AM Apr 29, 2024Observed: 4.36 ft at 8:14AM Apr 29, 2024Observed: 4.03 ft at 8:32AM Apr 29, 2024Observed: 3.92 ft at 8:38AM Apr 29, 2024Observed: 1.53 ft at 10:32AM Apr 29, 2024Observed: 1.42 ft at 10:36AM Apr 29, 2024Observed: 1.31 ft at 10:40AM Apr 29, 2024Observed: 1.2 ft at 10:44AM Apr 29, 2024Napa CountyNBDC1(plotting HGIRR) Graph Created (11:15AM Apr 29, 2024)ObservedLatest observed value: 1.2 ft at 10:44 AM PDT 29-Apr-2024.
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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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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: 38.209200° 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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