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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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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
Datum: NAVD88
Metadata
Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions
NOTE:
Forecasts for the Guadalupe River (CA) above Alamaden Expressway are issued routinely year-round.
Default Hydrograph
Scale to Flood Categories
Return to Area Map
Flood Categories (in feet)
Major Flood Stage:
14
Moderate Flood Stage:
11.5
Flood Stage:
8.5
Action Stage:
7.5
Low Stage (in feet):
-9999
Historic Crests
Currently none available.
Recent Crests
Currently none available.
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
If you notice any errors in the below information, please contact our
Webmaster
15.51
Cont'...Areas along Thousand Oaks Park and near Capitol Expressway at risk of overbanking. If flood is sustained or increasing, car dealerships along Capitol Expressway are inundated. The Thousand Oaks Neighborhood experiences significant street flooding and overtopping occurs near Branham Lan as well as flooding of businesses and the Erikson Neighborhood. Potential flooding on Ross and Canoas Creeks due to high backwater caused by Guadalupe River.
15.5
Washington/Guadalupe, Tamien and Alma/Almaden Neighborhoods east of CA-87 inundated from floodwaters traveling under street viaducts from the west. Widespread flooding in the eastern Willow Glen Neighborhood, as well as the Gardner and Atlanta/Bird Neighborhoods. CA87/I-280 interchange at risk from overland flow spilling onto the roadway. Possible overtopping of Guadalupe River between Branham and Capitol, mainly on the east side, with water flowing through streets.
14
Major Flood Stage. Flooding continues to spill near Alam Avenue, flowing northward and crossing east under Willow Street and Alma Avenue viaducts, continuing to flow north. Overbanking occurs at Atlanta Avenue just upstream of CA87. The Willow Glen Neighborhood bounded by Willow Street and Minnesota Avenue see overland flooding. Overbanking occurs in various locations between Alma Avenue and Willow Glen Way. Potential flooding on Ross and Canoas Creeks due to high backwater caused by Guadalupe River.
11.5
Moderate Flood Stage. River continues to overtop upstream of Alma Avenue Bridge into the Elks Lodge, spilling north along Lelong Street. Alma Avenue/CA87 viaduct is flooded. Creek overbanks west near Minnesota Avenue downstream of Alma Avenue. Properties south of the old UPRR alignment in the Northern Cross Neighborhood are also at risk. Thousand Oaks Park at risk of flooding.
8.5
Minor Flood Stage. River begins to overtop upstream of Alma Avenue Bridge into the Elks Lodge.
7.5
Monitor Stage. Additional flow from Canoas Creek watershed or increased reservoir spills may bring river to flood stage.
About This Location
Latitude: 37.280800° N, Longitude: 121.880200° W, Horizontal Datum: NAD83/WGS84
River Stage
Reference Frame
Gauge Height
Flood Stage
Uses
NWS stage
0 ft
8.5 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
134.89 ft
143.39 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
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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,
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Monterey, CA 93943-5505
(831) 656-1725
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Page last modified: 2-Nov-2020 7:27 PM
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