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Weather Forecast Office San Francisco Bay Area, CA

California Nevada River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (PST) Datum: NAVD88 Metadata

NOTE: Forecasts are not available for the Guadalupe River (CA) above Hwy 101 at San Jose. Only observed stages are available for this point.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Flood Categories (in feet) Major Flood Stage: 21 Moderate Flood Stage: 19.5 Flood Stage: 18.5 Action Stage: 17 Low Stage (in feet): -9999 Historic Crests (P): Preliminary values subject to further review. Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available.

Zoom Level:16 Legend FEMA Layer Gauge Location 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

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21	Major Flooding: Levee overtopping, with failures likely along both sides of the river between US-101 and Trimble flowing in a northerly direction.
19.5	Moderate Flooding: Levee overtopping imminent. Highest risk areas are between US-101 and Trimble.
18.5	Minor Flooding: High flows with heavy debris might cause localized blockages to cause overtopping of levees.
17	Monitor Stage: Flood watch stage. (9100.0 cfs)

About This Location

Latitude: 37.373830° N, Longitude: 121.933013° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 18.5 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 17.57 ft 36.07 ft 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   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Hwy 101 at San Jose

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary California Data Exchange Center Most Recent Scheduled Reservoir Releases USGS Real-time Data for California USGS - Western Region Geologic Information Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Information

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