Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap

  
 

Visit https://www.weather.gov/owp/operations 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.

View the Enhanced Operating Capability Products and Services StoryMap here



Hydrograph River at a Glance Download
Sage Creek at Lake Hennessey Stage (ft)Observed: 1.63 ft at 3:16AM Jan 30, 2023Observed: 1.63 ft at 3:20AM Jan 30, 2023Observed: 1.61 ft at 3:16PM Jan 30, 2023Observed: 1.61 ft at 3:20PM Jan 30, 2023Observed: 1.6 ft at 3:16AM Jan 31, 2023Observed: 1.6 ft at 3:20AM Jan 31, 2023Observed: 1.6 ft at 3:16PM Jan 31, 2023Observed: 1.6 ft at 3:20PM Jan 31, 2023Observed: 1.6 ft at 3:16AM Feb 01, 2023Observed: 1.6 ft at 3:20AM Feb 01, 2023Observed: 1.59 ft at 3:16PM Feb 01, 2023Observed: 1.59 ft at 3:20PM Feb 01, 2023Observed: 1.58 ft at 3:16AM Feb 02, 2023Observed: 1.58 ft at 3:20AM Feb 02, 2023Observed: 1.57 ft at 3:16PM Feb 02, 2023Observed: 1.57 ft at 3:20PM Feb 02, 2023Observed: 1.62 ft at 3:16AM Feb 03, 2023Observed: 1.62 ft at 3:20AM Feb 03, 2023Observed: 1.78 ft at 3:31AM Feb 03, 2023Observed: 1.78 ft at 3:35AM Feb 03, 2023Observed: 2.02 ft at 3:46AM Feb 03, 2023Observed: 2.03 ft at 3:50AM Feb 03, 2023Observed: 2.23 ft at 4:01AM Feb 03, 2023Observed: 2.23 ft at 4:05AM Feb 03, 2023Observed: 2.5 ft at 4:16AM Feb 03, 2023Observed: 2.5 ft at 4:20AM Feb 03, 2023Observed: 2.73 ft at 4:31AM Feb 03, 2023Observed: 2.73 ft at 4:35AM Feb 03, 2023Observed: 2.84 ft at 4:46AM Feb 03, 2023Observed: 2.84 ft at 4:50AM Feb 03, 2023Observed: 2.95 ft at 5:07AM Feb 03, 2023Observed: 2.95 ft at 5:10AM Feb 03, 2023Highest Observation: 3.16 ft at 5:22AM Feb 03, 2023Highest Observation: 3.16 ft at 5:25AM Feb 03, 2023Observed: 3.06 ft at 5:53AM Feb 03, 2023Observed: 3.06 ft at 5:55AM Feb 03, 2023Observed: 2.85 ft at 6:08AM Feb 03, 2023Observed: 2.85 ft at 6:10AM Feb 03, 2023Observed: 2.71 ft at 6:23AM Feb 03, 2023Observed: 2.71 ft at 6:25AM Feb 03, 2023Observed: 2.6 ft at 6:41AM Feb 03, 2023Observed: 2.6 ft at 6:45AM Feb 03, 2023Observed: 2.5 ft at 7:02AM Feb 03, 2023Observed: 2.5 ft at 7:05AM Feb 03, 2023Observed: 2.4 ft at 7:28AM Feb 03, 2023Observed: 2.4 ft at 7:30AM Feb 03, 2023Observed: 2.29 ft at 8:02AM Feb 03, 2023Observed: 2.29 ft at 8:05AM Feb 03, 2023Observed: 2.19 ft at 8:57AM Feb 03, 2023Observed: 2.19 ft at 9:00AM Feb 03, 2023Observed: 2.09 ft at 10:10AM Feb 03, 2023Observed: 2.09 ft at 10:15AM Feb 03, 2023Observed: 1.98 ft at 12:28PM Feb 03, 2023Observed: 1.98 ft at 12:30PM Feb 03, 2023Observed: 1.91 ft at 3:16PM Feb 03, 2023Observed: 1.91 ft at 3:20PM Feb 03, 2023Observed: 1.81 ft at 11:09PM Feb 03, 2023Observed: 1.81 ft at 11:10PM Feb 03, 2023SBSC1(plotting HGIRR) Graph Created (1:45AM Feb 4, 2023)ObservedLatest observed value: 1.81 ft at 11:10 PM PST 3-Feb-2023. Flood Stage is 13.3 ft
About this graph
Tabular Data (UTC)
Tabular Data (PST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Graphical forecasts are not available for the Sage Creek at Lake Hennessey. During times of high water, forecast crest information can be found in the text products.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 12
Moderate Flood Stage: 10
Flood Stage: 9
Action Stage: 7
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
If you notice any errors in the below information, please contact our Webmaster
12 Major flood stage. Water is approximately 2 feet deep on Highway 128 and surrounding floodplain. Travel severely restricted or impossible and dangerous along Highway 128.
10 Moderate flood stage. Water inundates floodplain, bridge deck at private driveway, and Highway 128. NWS will issue a Flash Flood Warning if not yet already issued.
9 Minor flood stage. Flows begin to backwater at private driveway bridge crossing at gaging site. NWS may issue an urban/small stream advisory if not already issued.
7 Monitor stage. Water is 2 feet below backwater conditions at private driveway at stream gaging site. NWS may issue a Flash Flood Watch if not yet already issued.
About This Location Collapse

Latitude: 38.491389° N, Longitude: 122.335278° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 9 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  
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:27 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities