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Hydrograph River at a Glance Download
Arroyo Simi near Simi Valley Stage (ft)Observed: 2.71 ft at 5:00PM Apr 10, 2024Observed: 2.71 ft at 6:00PM Apr 10, 2024Observed: 2.71 ft at 7:00PM Apr 10, 2024Observed: 2.71 ft at 8:00PM Apr 10, 2024Observed: 2.71 ft at 9:00PM Apr 10, 2024Observed: 2.71 ft at 12:00AM Apr 11, 2024Observed: 2.71 ft at 12:59AM Apr 11, 2024Observed: 2.71 ft at 2:00AM Apr 11, 2024Observed: 2.71 ft at 3:00AM Apr 11, 2024Observed: 2.71 ft at 4:00AM Apr 11, 2024Observed: 2.71 ft at 5:00AM Apr 11, 2024Observed: 2.71 ft at 6:00AM Apr 11, 2024Observed: 2.71 ft at 9:00AM Apr 11, 2024Observed: 2.71 ft at 11:00AM Apr 11, 2024Observed: 2.71 ft at 12:00PM Apr 11, 2024Observed: 2.71 ft at 1:00PM Apr 11, 2024Observed: 2.71 ft at 2:00PM Apr 11, 2024Observed: 2.71 ft at 3:00PM Apr 11, 2024Observed: 2.71 ft at 4:00PM Apr 11, 2024Observed: 2.71 ft at 5:00PM Apr 11, 2024Observed: 2.71 ft at 6:00PM Apr 11, 2024Observed: 2.71 ft at 7:00PM Apr 11, 2024Observed: 2.71 ft at 8:00PM Apr 11, 2024Observed: 2.71 ft at 9:00PM Apr 11, 2024Observed: 2.71 ft at 10:00PM Apr 11, 2024Observed: 2.71 ft at 11:00PM Apr 11, 2024Observed: 2.71 ft at 12:00AM Apr 12, 2024Observed: 2.71 ft at 12:59AM Apr 12, 2024Observed: 2.71 ft at 2:00AM Apr 12, 2024Observed: 2.71 ft at 3:00AM Apr 12, 2024Observed: 2.71 ft at 4:00AM Apr 12, 2024Observed: 2.71 ft at 5:00AM Apr 12, 2024Observed: 2.71 ft at 6:00AM Apr 12, 2024Observed: 2.71 ft at 8:00AM Apr 12, 2024Observed: 2.71 ft at 9:00AM Apr 12, 2024Observed: 2.71 ft at 10:00AM Apr 12, 2024Observed: 2.71 ft at 11:00AM Apr 12, 2024Observed: 2.71 ft at 12:00PM Apr 12, 2024Observed: 2.71 ft at 1:00PM Apr 12, 2024Observed: 2.71 ft at 2:00PM Apr 12, 2024Observed: 2.71 ft at 3:00PM Apr 12, 2024Observed: 2.71 ft at 4:00PM Apr 12, 2024Observed: 2.71 ft at 5:00PM Apr 12, 2024Observed: 2.71 ft at 6:00PM Apr 12, 2024Observed: 2.71 ft at 7:00PM Apr 12, 2024Observed: 2.71 ft at 8:00PM Apr 12, 2024Observed: 2.71 ft at 9:00PM Apr 12, 2024Observed: 2.71 ft at 10:00PM Apr 12, 2024Observed: 2.71 ft at 11:00PM Apr 12, 2024Observed: 2.71 ft at 12:00AM Apr 13, 2024Observed: 2.71 ft at 12:59AM Apr 13, 2024Observed: 2.71 ft at 2:00AM Apr 13, 2024Observed: 2.71 ft at 4:00AM Apr 13, 2024Observed: 2.71 ft at 5:00AM Apr 13, 2024Observed: 2.71 ft at 6:00AM Apr 13, 2024Observed: 2.71 ft at 8:00AM Apr 13, 2024Observed: 2.71 ft at 9:00AM Apr 13, 2024Observed: 2.71 ft at 10:00AM Apr 13, 2024Observed: 2.71 ft at 11:00AM Apr 13, 2024Observed: 2.71 ft at 12:00PM Apr 13, 2024Observed: 2.71 ft at 1:00PM Apr 13, 2024Observed: 2.71 ft at 2:00PM Apr 13, 2024Observed: 2.76 ft at 4:52PM Apr 13, 2024Observed: 2.84 ft at 4:57PM Apr 13, 2024Observed: 2.84 ft at 5:00PM Apr 13, 2024Observed: 2.91 ft at 5:02PM Apr 13, 2024Observed: 2.93 ft at 6:00PM Apr 13, 2024Observed: 3.01 ft at 6:22PM Apr 13, 2024Observed: 3.07 ft at 6:27PM Apr 13, 2024Observed: 3.17 ft at 6:32PM Apr 13, 2024Observed: 3.2 ft at 7:00PM Apr 13, 2024Observed: 3.29 ft at 7:12PM Apr 13, 2024Observed: 3.39 ft at 7:17PM Apr 13, 2024Highest Observation: 3.53 ft at 7:22PM Apr 13, 2024Observed: 3.48 ft at 8:00PM Apr 13, 2024Observed: 3.42 ft at 8:17PM Apr 13, 2024Observed: 3.37 ft at 8:32PM Apr 13, 2024Observed: 3.32 ft at 8:47PM Apr 13, 2024Observed: 3.29 ft at 9:00PM Apr 13, 2024Observed: 3.24 ft at 9:12PM Apr 13, 2024Observed: 3.18 ft at 9:32PM Apr 13, 2024Observed: 3.14 ft at 9:52PM Apr 13, 2024Observed: 3.13 ft at 10:00PM Apr 13, 2024Observed: 3.08 ft at 10:22PM Apr 13, 2024Observed: 3.03 ft at 10:57PM Apr 13, 2024Observed: 3.03 ft at 11:00PM Apr 13, 2024Observed: 2.98 ft at 11:42PM Apr 13, 2024Observed: 2.96 ft at 12:00AM Apr 14, 2024Observed: 2.91 ft at 12:52AM Apr 14, 2024Observed: 2.91 ft at 12:59AM Apr 14, 2024Observed: 2.87 ft at 2:00AM Apr 14, 2024Observed: 2.82 ft at 4:00AM Apr 14, 2024Observed: 2.81 ft at 5:00AM Apr 14, 2024Observed: 2.86 ft at 5:42AM Apr 14, 2024Observed: 2.91 ft at 5:52AM Apr 14, 2024Observed: 2.94 ft at 6:00AM Apr 14, 2024Observed: 2.99 ft at 6:07AM Apr 14, 2024Observed: 3.05 ft at 6:17AM Apr 14, 2024Observed: 3.09 ft at 6:27AM Apr 14, 2024Observed: 3.17 ft at 7:22AM Apr 14, 2024Observed: 3.24 ft at 7:27AM Apr 14, 2024Observed: 3.3 ft at 7:32AM Apr 14, 2024Observed: 3.35 ft at 7:37AM Apr 14, 2024Observed: 3.35 ft at 8:00AM Apr 14, 2024Observed: 3.29 ft at 8:12AM Apr 14, 2024Observed: 3.25 ft at 8:27AM Apr 14, 2024Observed: 3.25 ft at 9:00AM Apr 14, 2024Observed: 3.22 ft at 10:00AM Apr 14, 2024Observed: 3.17 ft at 10:32AM Apr 14, 2024Observed: 3.13 ft at 11:00AM Apr 14, 2024Observed: 3.08 ft at 11:47AM Apr 14, 2024Observed: 3.07 ft at 12:00PM Apr 14, 2024Observed: 3.12 ft at 12:17PM Apr 14, 2024Observed: 3.07 ft at 12:52PM Apr 14, 2024Observed: 3.06 ft at 1:00PM Apr 14, 2024Observed: 3.11 ft at 1:47PM Apr 14, 2024Observed: 3.15 ft at 2:00PM Apr 14, 2024Observed: 3.19 ft at 3:00PM Apr 14, 2024Observed: 3.26 ft at 3:12PM Apr 14, 2024Observed: 3.29 ft at 3:22PM Apr 14, 2024Observed: 3.27 ft at 4:00PM Apr 14, 2024Observed: 3.28 ft at 5:00PM Apr 14, 2024Observed: 3.23 ft at 5:27PM Apr 14, 2024Observed: 3.18 ft at 5:57PM Apr 14, 2024Observed: 3.18 ft at 6:00PM Apr 14, 2024Observed: 3.13 ft at 6:27PM Apr 14, 2024Observed: 3.03 ft at 7:52PM Apr 14, 2024Observed: 3.03 ft at 8:00PM Apr 14, 2024Observed: 2.98 ft at 8:47PM Apr 14, 2024Observed: 2.97 ft at 9:00PM Apr 14, 2024Observed: 2.92 ft at 9:57PM Apr 14, 2024Observed: 2.92 ft at 10:00PM Apr 14, 2024Observed: 2.9 ft at 11:00PM Apr 14, 2024Observed: 2.87 ft at 12:00AM Apr 15, 2024Observed: 2.85 ft at 12:59AM Apr 15, 2024Observed: 2.82 ft at 4:00AM Apr 15, 2024Observed: 2.8 ft at 6:00AM Apr 15, 2024Observed: 2.8 ft at 7:00AM Apr 15, 2024Observed: 2.79 ft at 8:00AM Apr 15, 2024Observed: 2.79 ft at 9:00AM Apr 15, 2024Observed: 2.79 ft at 10:00AM Apr 15, 2024Observed: 2.78 ft at 11:00AM Apr 15, 2024Observed: 2.78 ft at 12:00PM Apr 15, 2024Observed: 2.78 ft at 1:00PM Apr 15, 2024Observed: 2.77 ft at 2:00PM Apr 15, 2024Observed: 2.77 ft at 3:00PM Apr 15, 2024Observed: 2.77 ft at 4:00PM Apr 15, 2024Observed: 2.77 ft at 5:00PM Apr 15, 2024Observed: 2.76 ft at 6:00PM Apr 15, 2024Observed: 2.76 ft at 7:00PM Apr 15, 2024Observed: 2.76 ft at 8:00PM Apr 15, 2024Observed: 2.75 ft at 9:00PM Apr 15, 2024Observed: 2.75 ft at 10:00PM Apr 15, 2024Observed: 2.75 ft at 11:00PM Apr 15, 2024Observed: 2.75 ft at 12:00AM Apr 16, 2024Observed: 2.75 ft at 12:59AM Apr 16, 2024Observed: 2.75 ft at 2:00AM Apr 16, 2024Observed: 2.75 ft at 3:00AM Apr 16, 2024Observed: 2.74 ft at 4:00AM Apr 16, 2024Observed: 2.74 ft at 5:00AM Apr 16, 2024Observed: 2.74 ft at 6:00AM Apr 16, 2024Observed: 2.74 ft at 7:00AM Apr 16, 2024Observed: 2.74 ft at 8:00AM Apr 16, 2024Observed: 2.74 ft at 9:00AM Apr 16, 2024Observed: 2.74 ft at 10:00AM Apr 16, 2024Observed: 2.74 ft at 11:00AM Apr 16, 2024Observed: 2.74 ft at 12:00PM Apr 16, 2024Observed: 2.74 ft at 1:00PM Apr 16, 2024Observed: 2.74 ft at 2:00PM Apr 16, 2024Observed: 2.73 ft at 3:00PM Apr 16, 2024Observed: 2.73 ft at 4:00PM Apr 16, 2024Observed: 2.73 ft at 5:00PM Apr 16, 2024Observed: 2.73 ft at 6:00PM Apr 16, 2024Observed: 2.73 ft at 7:00PM Apr 16, 2024Observed: 2.73 ft at 8:00PM Apr 16, 2024Observed: 2.73 ft at 9:00PM Apr 16, 2024Observed: 2.73 ft at 10:00PM Apr 16, 2024Observed: 2.73 ft at 11:00PM Apr 16, 2024Observed: 2.73 ft at 12:00AM Apr 17, 2024Observed: 2.73 ft at 12:59AM Apr 17, 2024Observed: 2.73 ft at 2:00AM Apr 17, 2024Observed: 2.73 ft at 3:00AM Apr 17, 2024Observed: 2.73 ft at 6:00AM Apr 17, 2024Observed: 2.73 ft at 7:00AM Apr 17, 2024Observed: 2.73 ft at 8:00AM Apr 17, 2024Observed: 2.73 ft at 9:00AM Apr 17, 2024Observed: 2.73 ft at 10:00AM Apr 17, 2024Observed: 2.73 ft at 11:00AM Apr 17, 2024Observed: 2.73 ft at 12:00PM Apr 17, 2024Observed: 2.73 ft at 1:00PM Apr 17, 2024Observed: 2.73 ft at 2:00PM Apr 17, 2024Observed: 2.73 ft at 4:00PM Apr 17, 2024Observed: 2.73 ft at 5:00PM Apr 17, 2024Observed: 2.73 ft at 6:00PM Apr 17, 2024Observed: 2.73 ft at 7:00PM Apr 17, 2024Observed: 2.73 ft at 8:00PM Apr 17, 2024Observed: 2.73 ft at 9:00PM Apr 17, 2024Observed: 2.72 ft at 10:00PM Apr 17, 2024Observed: 2.72 ft at 11:00PM Apr 17, 2024Observed: 2.72 ft at 12:00AM Apr 18, 2024Observed: 2.72 ft at 12:59AM Apr 18, 2024Observed: 2.72 ft at 2:00AM Apr 18, 2024Observed: 2.72 ft at 3:00AM Apr 18, 2024Observed: 2.72 ft at 4:00AM Apr 18, 2024Observed: 2.72 ft at 5:00AM Apr 18, 2024Observed: 2.72 ft at 6:00AM Apr 18, 2024Observed: 2.72 ft at 7:00AM Apr 18, 2024Observed: 2.72 ft at 8:00AM Apr 18, 2024Observed: 2.72 ft at 9:00AM Apr 18, 2024Observed: 2.72 ft at 10:00AM Apr 18, 2024Observed: 2.72 ft at 11:00AM Apr 18, 2024Observed: 2.72 ft at 12:00PM Apr 18, 2024Observed: 2.72 ft at 1:00PM Apr 18, 2024Observed: 2.72 ft at 2:00PM Apr 18, 2024Observed: 2.72 ft at 3:00PM Apr 18, 2024Observed: 2.72 ft at 4:00PM Apr 18, 2024Observed: 2.72 ft at 5:00PM Apr 18, 2024Observed: 2.72 ft at 6:00PM Apr 18, 2024Observed: 2.72 ft at 7:00PM Apr 18, 2024Observed: 2.72 ft at 8:00PM Apr 18, 2024Observed: 2.72 ft at 9:00PM Apr 18, 2024Observed: 2.72 ft at 10:00PM Apr 18, 2024Observed: 2.72 ft at 11:00PM Apr 18, 2024Observed: 2.72 ft at 12:00AM Apr 19, 2024Observed: 2.72 ft at 12:59AM Apr 19, 2024Observed: 2.72 ft at 4:00AM Apr 19, 2024Observed: 2.72 ft at 5:00AM Apr 19, 2024Observed: 2.72 ft at 6:00AM Apr 19, 2024Observed: 2.72 ft at 7:00AM Apr 19, 2024Observed: 2.72 ft at 8:00AM Apr 19, 2024Observed: 2.72 ft at 9:00AM Apr 19, 2024Observed: 2.72 ft at 11:00AM Apr 19, 2024Observed: 2.72 ft at 12:00PM Apr 19, 2024Observed: 2.72 ft at 1:00PM Apr 19, 2024Observed: 2.72 ft at 2:00PM Apr 19, 2024Observed: 2.72 ft at 3:00PM Apr 19, 2024Observed: 2.72 ft at 4:00PM Apr 19, 2024Ventura County WPDASNC1(plotting HGIRR) Graph Created (4:41PM Apr 19, 2024)ObservedLatest observed value: 2.72 ft at 4:00 PM PDT 19-Apr-2024.
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NOTE: Graphical forecasts are not available for the Arroyo Simi near Simi Valley. During times of high water, forecast crest information can be found in the text products.
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Downstream Gauge Downstream Gauge - at CSUCI Bridge
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Not Available

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
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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.
About This Location Collapse

Latitude: 34.277500° N, Longitude: 118.795556° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available 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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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.
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