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Hydrograph River at a Glance Download
Sleepy Hollow Creek at RVFD Fire Station 20 Stage (ft)Observed: 2.23 ft at 8:02PM Nov 30, 2019Observed: 2.23 ft at 8:02AM Dec 01, 2019Observed: 2.35 ft at 8:52AM Dec 01, 2019Observed: 2.23 ft at 9:09AM Dec 01, 2019Observed: 2.35 ft at 9:26AM Dec 01, 2019Observed: 2.22 ft at 9:43AM Dec 01, 2019Observed: 2.33 ft at 3:25PM Dec 01, 2019Observed: 2.46 ft at 4:02PM Dec 01, 2019Observed: 2.6 ft at 4:17PM Dec 01, 2019Observed: 2.48 ft at 4:32PM Dec 01, 2019Observed: 2.36 ft at 4:56PM Dec 01, 2019Observed: 2.6 ft at 5:11PM Dec 01, 2019Observed: 2.48 ft at 5:39PM Dec 01, 2019Observed: 2.36 ft at 5:59PM Dec 01, 2019Observed: 2.25 ft at 6:26PM Dec 01, 2019Observed: 2.23 ft at 8:02PM Dec 01, 2019Observed: 2.34 ft at 3:56AM Dec 02, 2019Observed: 2.46 ft at 4:22AM Dec 02, 2019Observed: 2.57 ft at 4:37AM Dec 02, 2019Observed: 2.69 ft at 6:22AM Dec 02, 2019Observed: 2.8 ft at 6:47AM Dec 02, 2019Highest Observation: 2.9 ft at 7:08AM Dec 02, 2019Observed: 2.79 ft at 7:57AM Dec 02, 2019Observed: 2.76 ft at 8:02AM Dec 02, 2019Observed: 2.65 ft at 8:20AM Dec 02, 2019Observed: 2.54 ft at 9:02AM Dec 02, 2019Observed: 2.43 ft at 11:28AM Dec 02, 2019Observed: 2.33 ft at 11:55AM Dec 02, 2019Observed: 2.23 ft at 1:27PM Dec 02, 2019Observed: 2.23 ft at 8:02PM Dec 02, 2019Observed: 2.23 ft at 8:02AM Dec 03, 2019Observed: 2.23 ft at 8:02PM Dec 03, 2019Observed: 2.23 ft at 8:02AM Dec 04, 2019Observed: 2.23 ft at 8:02PM Dec 04, 2019Observed: 2.23 ft at 8:02AM Dec 05, 2019SYIC1(plotting HGIRR) Graph Created (1:45PM Dec 5, 2019)ObservedLatest observed value: 2.23 ft at 8:02 AM PST 5-Dec-2019. Flood Stage is 7.8 ft
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Tabular Data (UTC)
Tabular Data (PST)
XML Data
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Datum: Not Available
Metadata
NOTE: Graphical forecasts are not available for the Sleepy Hollow Creek at RVFD Fire Station 20. 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: 9.8
Moderate Flood Stage: 8.8
Flood Stage: 7.8
Action Stage: 5.3
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
Zoom Level:16
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Gauge LocationGauge Map Marker
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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.
Flood Impacts & Photos Collapse
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9.8 Major Flood Stage. Ross Valley Fire Station 20 flooded along with surrounding neighborhood. Arroyo Avenue, Butterfield Road, and other local roadways flooded, making travel difficult and dangerous.
8.8 Moderate flood
7.8 Minor Flood Stage. Culvert beneath Arroyo Avenue full and likely backwatered upstream. Possible overflow onto Arroyo Avenue, and other localized areas of flooding from creek water may be occurring. NWS will issue a Flash Flood Warning if not yet already issued.
5.3 Monitor Stage. Arroyo Avenue drain outfalls into Sleepy Hollow Creek backwatered. Street flooding from storm drains possible. NWS will issue a Flash Flood Watch if not yet already issued.
About This Location Collapse

Latitude: 37.991667° N, Longitude: 122.576111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 7.8 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  
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Page last modified: 4-Mar-2019 11:27 PM
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