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Visit for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

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Hydrograph River at a Glance Download
Belmont Creek at Harbor Blvd at Old County Road Stage (ft)Observed: 0.11 ft at 10:47PM Jan 21, 2023Observed: 0.11 ft at 10:47AM Jan 22, 2023Observed: 0.11 ft at 10:47PM Jan 22, 2023Highest Observation: 0.12 ft at 10:47AM Jan 23, 2023Highest Observation: 0.12 ft at 10:47PM Jan 23, 2023Highest Observation: 0.12 ft at 10:47PM Jan 24, 2023Highest Observation: 0.12 ft at 10:47AM Jan 25, 2023Highest Observation: 0.12 ft at 10:47PM Jan 25, 2023Observed: 0.11 ft at 10:47AM Jan 26, 2023OCRC1(plotting HGIRR) Graph Created (2:00PM Jan 26, 2023)ObservedLatest observed value: 0.11 ft at 10:47 AM PST 26-Jan-2023. Flood Stage is 4.1 ft
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Tabular Data (UTC)
Tabular Data (PST)
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Datum: Not Available
NOTE: Graphical forecasts are not available for the Belmont Creek at Harbor Blvd at Old County Road. 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: 5.2
Moderate Flood Stage: 4.5
Flood Stage: 4.1
Action Stage: 0
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

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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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If you notice any errors in the below information, please contact our Webmaster
5.2 Major Flooding. CalTrain culvert upstream of Old County Road at full capacity, likely backwatered upstream. Most roadways and businesses in the vicinity of the gauge flooded and impassable. Lower elevation industry and businesses along Old County Road flooded, with the Harbor Blvd/Old County Road intersection under several feet of water. Belmont Creek above channel capacity downstream of Old County Road.
4.5 Moderate Flooding. Storm drain outfall into Belmont Creek on either side of Old County Road completely backwatered, causing street flooding on Old County Road south of Harbor Boulevard. Harbor Boulevard underpass beneath CalTrain rail line also likely flooded. Culvert beneath Old County Road submerged and backwatered. NWS will issue Flash Flood Warning, if not yet already issued.
4.1 Minor Flooding. Water level is approximately 2 feet below lowest storm drain inlet on Old County Road. Storm drains on both side of Old County Road that outfall into Belmont Creek are already backwatered by 2 to 3 feet. NWS will issue an Urban/Small Stream Flood Advisory, if not yet already issued.
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Latitude: 37.517222° N, Longitude: 122.270833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 4.1 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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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NWS Information
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Monterey, CA 93943-5505
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Page last modified: 2-Nov-2020 7:27 PM
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