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Hydrograph River at a Glance Download
San Lorenzo River (CA) at Santa Cruz Stage (ft)Flow (kcfs)Highest Observation: 2.02 ft at 12:30AM Apr 17, 2021Highest Observation: 2.02 ft at 12:45AM Apr 17, 2021Highest Observation: 2.02 ft at 1:00AM Apr 17, 2021Highest Observation: 2.02 ft at 1:15AM Apr 17, 2021Highest Observation: 2.02 ft at 1:30AM Apr 17, 2021Highest Observation: 2.02 ft at 1:45AM Apr 17, 2021Highest Observation: 2.02 ft at 2:00AM Apr 17, 2021Highest Observation: 2.02 ft at 2:15AM Apr 17, 2021Highest Observation: 2.02 ft at 2:30AM Apr 17, 2021Highest Observation: 2.02 ft at 2:45AM Apr 17, 2021Highest Observation: 2.02 ft at 3:00AM Apr 17, 2021Highest Observation: 2.02 ft at 3:15AM Apr 17, 2021Highest Observation: 2.02 ft at 3:30AM Apr 17, 2021Highest Observation: 2.02 ft at 3:45AM Apr 17, 2021Highest Observation: 2.02 ft at 4:00AM Apr 17, 2021Highest Observation: 2.02 ft at 4:15AM Apr 17, 2021Highest Observation: 2.02 ft at 4:30AM Apr 17, 2021Highest Observation: 2.02 ft at 4:45AM Apr 17, 2021Highest Observation: 2.02 ft at 5:00AM Apr 17, 2021Highest Observation: 2.02 ft at 5:15AM Apr 17, 2021Highest Observation: 2.02 ft at 5:30AM Apr 17, 2021Observed: 2.01 ft at 5:45AM Apr 17, 2021Highest Observation: 2.02 ft at 6:00AM Apr 17, 2021Highest Observation: 2.02 ft at 6:15AM Apr 17, 2021Highest Observation: 2.02 ft at 6:30AM Apr 17, 2021Highest Observation: 2.02 ft at 6:45AM Apr 17, 2021Highest Observation: 2.02 ft at 7:00AM Apr 17, 2021Highest Observation: 2.02 ft at 7:15AM Apr 17, 2021Highest Observation: 2.02 ft at 7:30AM Apr 17, 2021Observed: 2.01 ft at 7:45AM Apr 17, 2021Highest Observation: 2.02 ft at 8:00AM Apr 17, 2021Observed: 2.01 ft at 8:15AM Apr 17, 2021Observed: 2.01 ft at 8:30AM Apr 17, 2021Observed: 2.01 ft at 8:45AM Apr 17, 2021Observed: 2.01 ft at 9:00AM Apr 17, 2021Observed: 2.01 ft at 9:15AM Apr 17, 2021Observed: 2.01 ft at 9:30AM Apr 17, 2021Highest Observation: 2.02 ft at 9:45AM Apr 17, 2021Highest Observation: 2.02 ft at 10:00AM Apr 17, 2021Highest Observation: 2.02 ft at 10:15AM Apr 17, 2021Highest Observation: 2.02 ft at 10:30AM Apr 17, 2021Highest Observation: 2.02 ft at 10:45AM Apr 17, 2021Highest Observation: 2.02 ft at 11:00AM Apr 17, 2021Highest Observation: 2.02 ft at 11:15AM Apr 17, 2021Highest Observation: 2.02 ft at 11:30AM Apr 17, 2021Highest Observation: 2.02 ft at 11:45AM Apr 17, 2021Highest Observation: 2.02 ft at 12:00PM Apr 17, 2021Highest Observation: 2.02 ft at 12:15PM Apr 17, 2021Highest Observation: 2.02 ft at 12:30PM Apr 17, 2021Highest Observation: 2.02 ft at 12:45PM Apr 17, 2021Highest Observation: 2.02 ft at 1:00PM Apr 17, 2021Highest Observation: 2.02 ft at 1:15PM Apr 17, 2021Highest Observation: 2.02 ft at 1:30PM Apr 17, 2021Highest Observation: 2.02 ft at 1:45PM Apr 17, 2021Highest Observation: 2.02 ft at 2:00PM Apr 17, 2021Highest Observation: 2.02 ft at 2:15PM Apr 17, 2021Highest Observation: 2.02 ft at 2:30PM Apr 17, 2021Highest Observation: 2.02 ft at 2:45PM Apr 17, 2021Highest Observation: 2.02 ft at 3:00PM Apr 17, 2021Highest Observation: 2.02 ft at 3:15PM Apr 17, 2021Highest Observation: 2.02 ft at 3:30PM Apr 17, 2021Highest Observation: 2.02 ft at 3:45PM Apr 17, 2021Highest Observation: 2.02 ft at 4:00PM Apr 17, 2021Highest Observation: 2.02 ft at 4:15PM Apr 17, 2021Highest Observation: 2.02 ft at 4:30PM Apr 17, 2021Highest Observation: 2.02 ft at 4:45PM Apr 17, 2021Observed: 2.01 ft at 5:00PM Apr 17, 2021Highest Observation: 2.02 ft at 5:15PM Apr 17, 2021Highest Observation: 2.02 ft at 5:30PM Apr 17, 2021Highest Observation: 2.02 ft at 5:45PM Apr 17, 2021Observed: 2.01 ft at 6:00PM Apr 17, 2021Highest Observation: 2.02 ft at 6:15PM Apr 17, 2021Highest Observation: 2.02 ft at 6:30PM Apr 17, 2021Observed: 2.01 ft at 6:45PM Apr 17, 2021Highest Observation: 2.02 ft at 7:00PM Apr 17, 2021Observed: 2.01 ft at 7:15PM Apr 17, 2021Observed: 2.01 ft at 7:30PM Apr 17, 2021Observed: 2.01 ft at 7:45PM Apr 17, 2021Highest Observation: 2.02 ft at 8:00PM Apr 17, 2021Observed: 2.01 ft at 8:15PM Apr 17, 2021Observed: 2.01 ft at 8:30PM Apr 17, 2021Observed: 2.01 ft at 8:45PM Apr 17, 2021Observed: 2.01 ft at 9:00PM Apr 17, 2021Observed: 2.01 ft at 9:15PM Apr 17, 2021Observed: 2.01 ft at 9:30PM Apr 17, 2021Observed: 2.01 ft at 9:45PM Apr 17, 2021Observed: 2.01 ft at 10:00PM Apr 17, 2021Observed: 2.01 ft at 10:15PM Apr 17, 2021Observed: 2.01 ft at 10:30PM Apr 17, 2021Observed: 2.01 ft at 10:45PM Apr 17, 2021Observed: 2.01 ft at 11:00PM Apr 17, 2021Observed: 2.01 ft at 11:15PM Apr 17, 2021Observed: 2.01 ft at 11:30PM Apr 17, 2021Observed: 2.01 ft at 11:45PM Apr 17, 2021Observed: 2.01 ft at 12:00AM Apr 18, 2021Observed: 2.01 ft at 12:15AM Apr 18, 2021Observed: 2.01 ft at 12:30AM Apr 18, 2021Observed: 2.01 ft at 12:45AM Apr 18, 2021Observed: 2.01 ft at 1:00AM Apr 18, 2021Observed: 2.01 ft at 1:15AM Apr 18, 2021Observed: 2.01 ft at 1:30AM Apr 18, 2021Observed: 2.01 ft at 1:45AM Apr 18, 2021Observed: 2.01 ft at 2:00AM Apr 18, 2021Observed: 2.01 ft at 2:15AM Apr 18, 2021Observed: 2.01 ft at 2:30AM Apr 18, 2021Observed: 2.01 ft at 2:45AM Apr 18, 2021Observed: 2.01 ft at 3:00AM Apr 18, 2021Observed: 2.01 ft at 3:15AM Apr 18, 2021Observed: 2.01 ft at 3:30AM Apr 18, 2021Observed: 2.01 ft at 3:45AM Apr 18, 2021Observed: 2.01 ft at 4:00AM Apr 18, 2021Observed: 2.01 ft at 4:15AM Apr 18, 2021Observed: 2.01 ft at 4:30AM Apr 18, 2021Observed: 2.01 ft at 4:45AM Apr 18, 2021Observed: 2.01 ft at 5:00AM Apr 18, 2021Observed: 2.01 ft at 5:15AM Apr 18, 2021Observed: 2.01 ft at 5:30AM Apr 18, 2021Observed: 2.01 ft at 5:45AM Apr 18, 2021Observed: 2.01 ft at 6:00AM Apr 18, 2021Observed: 2.01 ft at 6:15AM Apr 18, 2021Observed: 2.01 ft at 6:30AM Apr 18, 2021Observed: 2.01 ft at 6:45AM Apr 18, 2021Observed: 2.01 ft at 7:00AM Apr 18, 2021Observed: 2.01 ft at 7:15AM Apr 18, 2021Observed: 2.01 ft at 7:30AM Apr 18, 2021Observed: 2.01 ft at 7:45AM Apr 18, 2021Observed: 2.01 ft at 8:00AM Apr 18, 2021Observed: 2.01 ft at 8:15AM Apr 18, 2021Observed: 2.01 ft at 8:30AM Apr 18, 2021Observed: 2.01 ft at 8:45AM Apr 18, 2021Observed: 2.01 ft at 9:00AM Apr 18, 2021Observed: 2.01 ft at 9:15AM Apr 18, 2021Observed: 2.01 ft at 9:30AM Apr 18, 2021Observed: 2.01 ft at 9:45AM Apr 18, 2021Observed: 2.01 ft at 10:00AM Apr 18, 2021Observed: 2.01 ft at 10:15AM Apr 18, 2021Observed: 2.01 ft at 10:30AM Apr 18, 2021Observed: 2.01 ft at 10:45AM Apr 18, 2021Highest Observation: 2.02 ft at 11:00AM Apr 18, 2021Highest Observation: 2.02 ft at 11:15AM Apr 18, 2021Highest Observation: 2.02 ft at 11:30AM Apr 18, 2021Observed: 2.01 ft at 11:45AM Apr 18, 2021Observed: 2.01 ft at 12:00PM Apr 18, 2021Highest Observation: 2.02 ft at 12:15PM Apr 18, 2021Observed: 2.01 ft at 12:30PM Apr 18, 2021Highest Observation: 2.02 ft at 12:45PM Apr 18, 2021Observed: 2.01 ft at 1:00PM Apr 18, 2021Observed: 2.01 ft at 1:15PM Apr 18, 2021Observed: 2.01 ft at 1:30PM Apr 18, 2021Highest Observation: 2.02 ft at 1:45PM Apr 18, 2021Highest Observation: 2.02 ft at 2:00PM Apr 18, 2021Highest Observation: 2.02 ft at 2:15PM Apr 18, 2021Observed: 2.01 ft at 2:30PM Apr 18, 2021Highest Observation: 2.02 ft at 2:45PM Apr 18, 2021Highest Observation: 2.02 ft at 3:00PM Apr 18, 2021Observed: 2.01 ft at 3:15PM Apr 18, 2021Highest Observation: 2.02 ft at 3:30PM Apr 18, 2021Observed: 2.01 ft at 3:45PM Apr 18, 2021Highest Observation: 2.02 ft at 4:00PM Apr 18, 2021Highest Observation: 2.02 ft at 4:15PM Apr 18, 2021Observed: 2.01 ft at 4:30PM Apr 18, 2021Observed: 2.01 ft at 4:45PM Apr 18, 2021Observed: 2.01 ft at 5:00PM Apr 18, 2021Observed: 2.01 ft at 5:15PM Apr 18, 2021Observed: 2.01 ft at 5:30PM Apr 18, 2021Observed: 2.01 ft at 5:45PM Apr 18, 2021Observed: 2.01 ft at 6:00PM Apr 18, 2021Observed: 2.01 ft at 6:15PM Apr 18, 2021Observed: 2.01 ft at 6:30PM Apr 18, 2021Observed: 2.01 ft at 6:45PM Apr 18, 2021Observed: 2.01 ft at 7:00PM Apr 18, 2021Observed: 2.01 ft at 7:15PM Apr 18, 2021Observed: 2.01 ft at 7:30PM Apr 18, 2021Observed: 2.01 ft at 7:45PM Apr 18, 2021Observed: 2.01 ft at 8:00PM Apr 18, 2021Observed: 2.01 ft at 8:15PM Apr 18, 2021Observed: 2.01 ft at 8:30PM Apr 18, 2021Observed: 2.01 ft at 8:45PM Apr 18, 2021Observed: 2.01 ft at 9:00PM Apr 18, 2021Observed: 2.01 ft at 9:15PM Apr 18, 2021Observed: 2.01 ft at 9:30PM Apr 18, 2021Observed: 2.01 ft at 9:45PM Apr 18, 2021Observed: 2.01 ft at 10:00PM Apr 18, 2021Observed: 2.01 ft at 10:15PM Apr 18, 2021Observed: 2.01 ft at 10:30PM Apr 18, 2021Observed: 2.01 ft at 10:45PM Apr 18, 2021Observed: 2.01 ft at 11:00PM Apr 18, 2021Observed: 2.01 ft at 11:15PM Apr 18, 2021Observed: 2.01 ft at 11:30PM Apr 18, 2021Observed: 2.01 ft at 11:45PM Apr 18, 2021Observed: 2.01 ft at 12:00AM Apr 19, 2021Observed: 2.01 ft at 12:15AM Apr 19, 2021Observed: 2.01 ft at 12:30AM Apr 19, 2021Observed: 2.01 ft at 12:45AM Apr 19, 2021Observed: 2.01 ft at 1:00AM Apr 19, 2021Observed: 2.01 ft at 1:15AM Apr 19, 2021Observed: 2.01 ft at 1:30AM Apr 19, 2021Observed: 2.01 ft at 1:45AM Apr 19, 2021Observed: 2 ft at 2:00AM Apr 19, 2021Observed: 2 ft at 2:15AM Apr 19, 2021Observed: 2.01 ft at 2:30AM Apr 19, 2021Observed: 2 ft at 2:45AM Apr 19, 2021Observed: 2 ft at 3:00AM Apr 19, 2021Observed: 2 ft at 3:15AM Apr 19, 2021Observed: 2 ft at 3:30AM Apr 19, 2021Observed: 2 ft at 3:45AM Apr 19, 2021Observed: 2.01 ft at 4:00AM Apr 19, 2021Observed: 2 ft at 4:15AM Apr 19, 2021Observed: 2 ft at 4:30AM Apr 19, 2021Observed: 2 ft at 4:45AM Apr 19, 2021Observed: 2 ft at 5:00AM Apr 19, 2021Observed: 2 ft at 5:15AM Apr 19, 2021Observed: 2 ft at 5:30AM Apr 19, 2021Observed: 2 ft at 5:45AM Apr 19, 2021Observed: 2 ft at 6:00AM Apr 19, 2021Observed: 2 ft at 6:15AM Apr 19, 2021Observed: 2 ft at 6:30AM Apr 19, 2021Observed: 2 ft at 6:45AM Apr 19, 2021Observed: 2 ft at 7:00AM Apr 19, 2021Observed: 2 ft at 7:15AM Apr 19, 2021Observed: 2 ft at 7:30AM Apr 19, 2021Observed: 2.01 ft at 7:45AM Apr 19, 2021Observed: 2 ft at 8:00AM Apr 19, 2021Observed: 2.01 ft at 8:15AM Apr 19, 2021Observed: 2 ft at 8:30AM Apr 19, 2021Observed: 2 ft at 8:45AM Apr 19, 2021Observed: 2.01 ft at 9:00AM Apr 19, 2021Observed: 2.01 ft at 9:15AM Apr 19, 2021Observed: 2.01 ft at 9:30AM Apr 19, 2021Observed: 2 ft at 9:45AM Apr 19, 2021Observed: 2.01 ft at 10:00AM Apr 19, 2021Observed: 2 ft at 10:15AM Apr 19, 2021Observed: 2.01 ft at 10:30AM Apr 19, 2021Observed: 2.01 ft at 10:45AM Apr 19, 2021Observed: 2.01 ft at 11:00AM Apr 19, 2021Observed: 2.01 ft at 11:15AM Apr 19, 2021Observed: 2.01 ft at 11:30AM Apr 19, 2021Observed: 2.01 ft at 11:45AM Apr 19, 2021Observed: 2.01 ft at 12:00PM Apr 19, 2021Observed: 2.01 ft at 12:15PM Apr 19, 2021Observed: 2.01 ft at 12:30PM Apr 19, 2021Observed: 2.01 ft at 12:45PM Apr 19, 2021Observed: 2.01 ft at 1:00PM Apr 19, 2021Observed: 2.01 ft at 1:15PM Apr 19, 2021Observed: 2.01 ft at 1:30PM Apr 19, 2021Observed: 2.01 ft at 1:45PM Apr 19, 2021Observed: 2.01 ft at 2:00PM Apr 19, 2021Observed: 2.01 ft at 2:15PM Apr 19, 2021Observed: 2.01 ft at 2:30PM Apr 19, 2021Observed: 2.01 ft at 2:45PM Apr 19, 2021Observed: 2 ft at 3:00PM Apr 19, 2021Observed: 2.01 ft at 3:15PM Apr 19, 2021Observed: 2 ft at 3:30PM Apr 19, 2021Observed: 2.01 ft at 3:45PM Apr 19, 2021Observed: 2 ft at 4:00PM Apr 19, 2021Observed: 2 ft at 4:15PM Apr 19, 2021Observed: 2.01 ft at 4:30PM Apr 19, 2021Observed: 2 ft at 4:45PM Apr 19, 2021Observed: 2 ft at 5:00PM Apr 19, 2021Observed: 2 ft at 5:15PM Apr 19, 2021Observed: 2 ft at 5:30PM Apr 19, 2021Observed: 2 ft at 5:45PM Apr 19, 2021Observed: 2 ft at 6:00PM Apr 19, 2021Observed: 2 ft at 6:15PM Apr 19, 2021Observed: 2 ft at 6:30PM Apr 19, 2021Observed: 2 ft at 6:45PM Apr 19, 2021Observed: 2 ft at 7:00PM Apr 19, 2021Observed: 2 ft at 7:15PM Apr 19, 2021Observed: 2 ft at 7:30PM Apr 19, 2021Observed: 2.01 ft at 7:45PM Apr 19, 2021Observed: 2 ft at 8:00PM Apr 19, 2021Observed: 2 ft at 8:15PM Apr 19, 2021Observed: 2 ft at 8:30PM Apr 19, 2021Observed: 2 ft at 8:45PM Apr 19, 2021Observed: 2.01 ft at 9:00PM Apr 19, 2021Observed: 2 ft at 9:15PM Apr 19, 2021Observed: 2 ft at 9:30PM Apr 19, 2021Observed: 2 ft at 9:45PM Apr 19, 2021Observed: 2 ft at 10:00PM Apr 19, 2021Observed: 2 ft at 10:15PM Apr 19, 2021Observed: 2.01 ft at 10:30PM Apr 19, 2021Observed: 2 ft at 10:45PM Apr 19, 2021Observed: 2 ft at 11:00PM Apr 19, 2021Observed: 2 ft at 11:15PM Apr 19, 2021Observed: 2 ft at 11:30PM Apr 19, 2021Observed: 2 ft at 11:45PM Apr 19, 2021Observed: 2 ft at 12:00AM Apr 20, 2021USGS--Water Resources of the United StatesLRRC1(plotting HGIRG) Graph Created (12:15AM Apr 20, 2021)ObservedLatest observed value: 2 ft at 12:00 AM PDT 20-Apr-2021. Flood Stage is 20.6 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Graphical forecasts are not available for the San Lorenzo River (CA) at Santa Cruz. During times of high water, forecast crest information can be found in the text products.
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Flood Categories (in feet)
Major Flood Stage: 25
Moderate Flood Stage: 23.33
Flood Stage: 20.6
Action Stage: 18
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 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 Collapse
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25 Major Flooding. Flows are above the upper limits of the rating curve, but likely near 20,000cfs. More widespread flooding in the benchlands adjacent to the County buildings expected, although flows will still remain below levee top elevations.
23.33 Moderate Flooding. (~15,000 cfs) Salz Tanner/Tannery Arts Center and Central Home Supply will become more heavily flooded, as well as some low lying areas off of Ocean Street extension. Flooding of benchlands adjacent to the Santa Cruz County buildings, the Boardwalk, and Beach Flats near the river. Drainage problems and flooding along East Cliff Drive and Murray Street near the river. Major flooding at Paradise Park. NWS will issue a Flash Flood Warning, if not yet already issued.
20.55 Minor Flooding. At 20.55 feet, discharge is approximately 10,000 cfs. Minor flooding in Salz Tannery/Tannery Arts Center and Central Home Supply, and along the Santa Cruz Riverwalk trail beneath Highway 1. Benchlands next to the Santa Cruz County buildings may begin to flood, and problematic flooding and drainage issues may begin in the lowermost reaches of the river floodplain near the Boardwalk and Beach Flats area. Paradise Park begins to flood. NWS will issue an Urban/Small Stream Advisory.
18 Monitor Stage. Stage can rise rapidly on the San Lorenzo River, up to several feet per hour. Level is roughly equivalent to 15 feet stage at the Big Trees gage in Felton, which is 1.5 feet below the flood stage at the Big Trees gage for Paradise Park flooding. NWS may issue a Flash Flood Watch for Santa Cruz area flooding, if not yet already issued.
About This Location Collapse

Latitude: 36.990833° N, Longitude: 122.031111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 20.6 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 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  

Current/Historical Observations:
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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.
NWS Information
National Weather Service
San Francisco Bay Area Weather Forecast Office
21 Grace Hopper Ave, Stop 5
Monterey, CA 93943-5505
(831) 656-1725
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