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

  
 

Web Portal Changes: In Spring 2024, the Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS) at a repurposed https://water.noaa.gov. A preview of NWPS is available here, where you can see your station hydrograph by replacing SSSSS with the station 5-character id: https://preview.water.noaa.gov/gauges/SSSSS.

Flood Inundation Mapping: Experimental real-time flood Inundation mapping services for 10% of the United States are now available via the NWS Map Viewer. Additional products and geospatial services depicting River Forecast Center and National Water Model forecasts continue to be accessible as described in the StoryMap here.

Please visit https://www.weather.gov/owp/operations for more information.



Hydrograph River at a Glance Download
Arroyo Simi near Simi Valley Stage (ft)Observed: 3.07 ft at 6:00AM Feb 20, 2024Observed: 3.08 ft at 7:00AM Feb 20, 2024Observed: 3.11 ft at 8:00AM Feb 20, 2024Observed: 3.09 ft at 9:00AM Feb 20, 2024Observed: 3.04 ft at 9:32AM Feb 20, 2024Observed: 3.03 ft at 10:00AM Feb 20, 2024Observed: 3.02 ft at 11:00AM Feb 20, 2024Observed: 3.07 ft at 11:17AM Feb 20, 2024Observed: 3.15 ft at 11:27AM Feb 20, 2024Observed: 3.2 ft at 11:32AM Feb 20, 2024Observed: 3.23 ft at 11:37AM Feb 20, 2024Observed: 3.22 ft at 12:00PM Feb 20, 2024Observed: 3.17 ft at 12:32PM Feb 20, 2024Observed: 3.27 ft at 12:47PM Feb 20, 2024Observed: 3.33 ft at 12:52PM Feb 20, 2024Observed: 3.42 ft at 12:57PM Feb 20, 2024Observed: 3.54 ft at 1:00PM Feb 20, 2024Observed: 3.63 ft at 1:02PM Feb 20, 2024Observed: 3.73 ft at 1:07PM Feb 20, 2024Observed: 3.66 ft at 1:17PM Feb 20, 2024Observed: 3.6 ft at 1:22PM Feb 20, 2024Observed: 3.63 ft at 1:42PM Feb 20, 2024Observed: 3.65 ft at 1:52PM Feb 20, 2024Observed: 3.66 ft at 2:00PM Feb 20, 2024Observed: 3.57 ft at 2:12PM Feb 20, 2024Observed: 3.53 ft at 2:17PM Feb 20, 2024Observed: 3.51 ft at 2:22PM Feb 20, 2024Observed: 3.61 ft at 2:42PM Feb 20, 2024Observed: 3.66 ft at 2:47PM Feb 20, 2024Observed: 3.58 ft at 2:57PM Feb 20, 2024Observed: 3.58 ft at 3:00PM Feb 20, 2024Observed: 3.5 ft at 3:07PM Feb 20, 2024Observed: 3.47 ft at 3:12PM Feb 20, 2024Observed: 3.43 ft at 3:22PM Feb 20, 2024Observed: 3.34 ft at 4:00PM Feb 20, 2024Observed: 3.29 ft at 4:17PM Feb 20, 2024Observed: 3.24 ft at 4:37PM Feb 20, 2024Observed: 3.23 ft at 5:00PM Feb 20, 2024Observed: 3.31 ft at 5:07PM Feb 20, 2024Observed: 3.35 ft at 5:12PM Feb 20, 2024Observed: 3.38 ft at 5:17PM Feb 20, 2024Observed: 3.43 ft at 5:22PM Feb 20, 2024Observed: 3.5 ft at 5:37PM Feb 20, 2024Observed: 3.54 ft at 5:42PM Feb 20, 2024Observed: 3.64 ft at 5:52PM Feb 20, 2024Observed: 3.69 ft at 5:57PM Feb 20, 2024Observed: 3.69 ft at 6:00PM Feb 20, 2024Observed: 3.74 ft at 6:32PM Feb 20, 2024Observed: 3.8 ft at 6:42PM Feb 20, 2024Observed: 3.8 ft at 7:00PM Feb 20, 2024Observed: 3.83 ft at 8:00PM Feb 20, 2024Observed: 3.77 ft at 8:22PM Feb 20, 2024Observed: 3.73 ft at 8:32PM Feb 20, 2024Observed: 3.67 ft at 8:47PM Feb 20, 2024Observed: 3.63 ft at 8:57PM Feb 20, 2024Observed: 3.63 ft at 9:00PM Feb 20, 2024Observed: 3.57 ft at 9:17PM Feb 20, 2024Observed: 3.52 ft at 9:37PM Feb 20, 2024Observed: 3.49 ft at 10:00PM Feb 20, 2024Observed: 3.44 ft at 10:27PM Feb 20, 2024Observed: 3.4 ft at 11:00PM Feb 20, 2024Observed: 3.32 ft at 11:59PM Feb 20, 2024Observed: 3.27 ft at 12:52AM Feb 21, 2024Observed: 3.27 ft at 1:00AM Feb 21, 2024Observed: 3.22 ft at 1:42AM Feb 21, 2024Observed: 3.22 ft at 2:00AM Feb 21, 2024Observed: 3.29 ft at 2:07AM Feb 21, 2024Observed: 3.36 ft at 2:12AM Feb 21, 2024Observed: 3.61 ft at 2:17AM Feb 21, 2024Observed: 3.96 ft at 2:22AM Feb 21, 2024Observed: 4.07 ft at 2:27AM Feb 21, 2024Observed: 4.21 ft at 2:37AM Feb 21, 2024Observed: 4.36 ft at 2:42AM Feb 21, 2024Observed: 4.66 ft at 2:47AM Feb 21, 2024Observed: 4.81 ft at 2:52AM Feb 21, 2024Observed: 4.91 ft at 2:57AM Feb 21, 2024Observed: 5.05 ft at 3:00AM Feb 21, 2024Highest Observation: 5.24 ft at 3:07AM Feb 21, 2024Observed: 5.2 ft at 3:32AM Feb 21, 2024Observed: 5.18 ft at 4:00AM Feb 21, 2024Observed: 5.11 ft at 4:12AM Feb 21, 2024Observed: 5.05 ft at 4:17AM Feb 21, 2024Observed: 4.99 ft at 4:22AM Feb 21, 2024Observed: 4.81 ft at 4:37AM Feb 21, 2024Observed: 4.74 ft at 4:42AM Feb 21, 2024Observed: 4.7 ft at 4:47AM Feb 21, 2024Observed: 4.64 ft at 4:52AM Feb 21, 2024Observed: 4.57 ft at 4:57AM Feb 21, 2024Observed: 4.57 ft at 5:00AM Feb 21, 2024Observed: 4.48 ft at 5:07AM Feb 21, 2024Observed: 4.43 ft at 5:12AM Feb 21, 2024Observed: 4.39 ft at 5:17AM Feb 21, 2024Observed: 4.36 ft at 5:22AM Feb 21, 2024Observed: 4.31 ft at 5:27AM Feb 21, 2024Observed: 4.25 ft at 5:37AM Feb 21, 2024Observed: 4.22 ft at 5:42AM Feb 21, 2024Observed: 4.16 ft at 5:52AM Feb 21, 2024Observed: 4.12 ft at 5:57AM Feb 21, 2024Observed: 4.12 ft at 6:00AM Feb 21, 2024Observed: 4.06 ft at 6:07AM Feb 21, 2024Observed: 4.01 ft at 6:17AM Feb 21, 2024Observed: 3.95 ft at 6:27AM Feb 21, 2024Observed: 3.86 ft at 6:47AM Feb 21, 2024Observed: 3.77 ft at 7:12AM Feb 21, 2024Observed: 3.71 ft at 7:32AM Feb 21, 2024Observed: 3.64 ft at 8:00AM Feb 21, 2024Observed: 3.59 ft at 8:22AM Feb 21, 2024Observed: 3.54 ft at 8:47AM Feb 21, 2024Observed: 3.53 ft at 9:00AM Feb 21, 2024Observed: 3.48 ft at 9:27AM Feb 21, 2024Observed: 3.44 ft at 10:00AM Feb 21, 2024Observed: 3.39 ft at 10:42AM Feb 21, 2024Observed: 3.38 ft at 11:00AM Feb 21, 2024Observed: 3.33 ft at 11:47AM Feb 21, 2024Observed: 3.32 ft at 12:00PM Feb 21, 2024Observed: 3.28 ft at 1:00PM Feb 21, 2024Observed: 3.24 ft at 2:00PM Feb 21, 2024Observed: 3.21 ft at 3:00PM Feb 21, 2024Observed: 3.18 ft at 4:00PM Feb 21, 2024Observed: 3.16 ft at 5:00PM Feb 21, 2024Observed: 3.14 ft at 6:00PM Feb 21, 2024Observed: 3.13 ft at 7:00PM Feb 21, 2024Observed: 3.11 ft at 8:00PM Feb 21, 2024Observed: 3.09 ft at 9:00PM Feb 21, 2024Observed: 3.07 ft at 10:00PM Feb 21, 2024Observed: 3.06 ft at 11:00PM Feb 21, 2024Observed: 3.05 ft at 11:59PM Feb 21, 2024Observed: 3.04 ft at 1:00AM Feb 22, 2024Observed: 3.03 ft at 2:00AM Feb 22, 2024Observed: 3.02 ft at 3:00AM Feb 22, 2024Observed: 3.01 ft at 4:00AM Feb 22, 2024Observed: 3 ft at 5:00AM Feb 22, 2024Observed: 2.99 ft at 6:00AM Feb 22, 2024Observed: 2.98 ft at 8:00AM Feb 22, 2024Observed: 2.97 ft at 9:00AM Feb 22, 2024Observed: 2.97 ft at 10:00AM Feb 22, 2024Observed: 2.96 ft at 11:00AM Feb 22, 2024Observed: 2.95 ft at 12:00PM Feb 22, 2024Observed: 2.95 ft at 1:00PM Feb 22, 2024Observed: 2.94 ft at 2:00PM Feb 22, 2024Observed: 2.94 ft at 3:00PM Feb 22, 2024Observed: 2.93 ft at 4:00PM Feb 22, 2024Observed: 2.93 ft at 5:00PM Feb 22, 2024Observed: 2.92 ft at 6:00PM Feb 22, 2024Observed: 2.91 ft at 7:00PM Feb 22, 2024Observed: 2.91 ft at 8:00PM Feb 22, 2024Observed: 2.9 ft at 9:00PM Feb 22, 2024Observed: 2.9 ft at 10:00PM Feb 22, 2024Observed: 2.89 ft at 11:00PM Feb 22, 2024Observed: 2.89 ft at 11:59PM Feb 22, 2024Observed: 2.89 ft at 1:00AM Feb 23, 2024Observed: 2.88 ft at 2:00AM Feb 23, 2024Observed: 2.88 ft at 3:00AM Feb 23, 2024Observed: 2.88 ft at 4:00AM Feb 23, 2024Observed: 2.88 ft at 5:00AM Feb 23, 2024Observed: 2.87 ft at 6:00AM Feb 23, 2024Observed: 2.87 ft at 7:00AM Feb 23, 2024Observed: 2.87 ft at 8:00AM Feb 23, 2024Observed: 2.87 ft at 9:00AM Feb 23, 2024Observed: 2.86 ft at 10:00AM Feb 23, 2024Observed: 2.86 ft at 11:00AM Feb 23, 2024Observed: 2.85 ft at 12:00PM Feb 23, 2024Observed: 2.85 ft at 1:00PM Feb 23, 2024Observed: 2.85 ft at 2:00PM Feb 23, 2024Observed: 2.85 ft at 3:00PM Feb 23, 2024Observed: 2.84 ft at 4:00PM Feb 23, 2024Observed: 2.84 ft at 5:00PM Feb 23, 2024Observed: 2.83 ft at 6:00PM Feb 23, 2024Observed: 2.83 ft at 7:00PM Feb 23, 2024Observed: 2.83 ft at 8:00PM Feb 23, 2024Observed: 2.82 ft at 9:00PM Feb 23, 2024Observed: 2.82 ft at 10:00PM Feb 23, 2024Observed: 2.82 ft at 11:00PM Feb 23, 2024Observed: 2.81 ft at 11:59PM Feb 23, 2024Observed: 2.81 ft at 1:00AM Feb 24, 2024Observed: 2.81 ft at 2:00AM Feb 24, 2024Observed: 2.81 ft at 3:00AM Feb 24, 2024Observed: 2.81 ft at 4:00AM Feb 24, 2024Observed: 2.81 ft at 5:00AM Feb 24, 2024Observed: 2.81 ft at 6:00AM Feb 24, 2024Observed: 2.81 ft at 7:00AM Feb 24, 2024Observed: 2.81 ft at 8:00AM Feb 24, 2024Observed: 2.81 ft at 9:00AM Feb 24, 2024Observed: 2.81 ft at 10:00AM Feb 24, 2024Observed: 2.8 ft at 11:00AM Feb 24, 2024Observed: 2.8 ft at 12:00PM Feb 24, 2024Observed: 2.8 ft at 1:00PM Feb 24, 2024Observed: 2.8 ft at 2:00PM Feb 24, 2024Observed: 2.79 ft at 3:00PM Feb 24, 2024Observed: 2.79 ft at 4:00PM Feb 24, 2024Observed: 2.79 ft at 5:00PM Feb 24, 2024Observed: 2.79 ft at 6:00PM Feb 24, 2024Observed: 2.78 ft at 7:00PM Feb 24, 2024Observed: 2.78 ft at 8:00PM Feb 24, 2024Observed: 2.78 ft at 9:00PM Feb 24, 2024Observed: 2.78 ft at 10:00PM Feb 24, 2024Observed: 2.77 ft at 11:00PM Feb 24, 2024Observed: 2.77 ft at 11:59PM Feb 24, 2024Observed: 2.77 ft at 1:00AM Feb 25, 2024Observed: 2.77 ft at 2:00AM Feb 25, 2024Observed: 2.77 ft at 3:00AM Feb 25, 2024Observed: 2.77 ft at 4:00AM Feb 25, 2024Observed: 2.77 ft at 5:00AM Feb 25, 2024Observed: 2.77 ft at 6:00AM Feb 25, 2024Observed: 2.77 ft at 7:00AM Feb 25, 2024Observed: 2.77 ft at 8:00AM Feb 25, 2024Observed: 2.77 ft at 9:00AM Feb 25, 2024Observed: 2.77 ft at 10:00AM Feb 25, 2024Observed: 2.77 ft at 11:00AM Feb 25, 2024Observed: 2.77 ft at 12:00PM Feb 25, 2024Observed: 2.77 ft at 1:00PM Feb 25, 2024Observed: 2.77 ft at 2:00PM Feb 25, 2024Observed: 2.77 ft at 3:00PM Feb 25, 2024Observed: 2.77 ft at 4:00PM Feb 25, 2024Observed: 2.77 ft at 5:00PM Feb 25, 2024Observed: 2.76 ft at 6:00PM Feb 25, 2024Observed: 2.76 ft at 7:00PM Feb 25, 2024Observed: 2.76 ft at 8:00PM Feb 25, 2024Observed: 2.76 ft at 9:00PM Feb 25, 2024Observed: 2.76 ft at 10:00PM Feb 25, 2024Observed: 2.75 ft at 11:00PM Feb 25, 2024Observed: 2.75 ft at 11:59PM Feb 25, 2024Observed: 2.75 ft at 1:00AM Feb 26, 2024Observed: 2.75 ft at 2:00AM Feb 26, 2024Observed: 2.75 ft at 3:00AM Feb 26, 2024Observed: 2.75 ft at 4:00AM Feb 26, 2024Observed: 2.75 ft at 5:00AM Feb 26, 2024Observed: 2.75 ft at 7:00AM Feb 26, 2024Observed: 2.75 ft at 8:00AM Feb 26, 2024Observed: 2.75 ft at 9:00AM Feb 26, 2024Observed: 2.75 ft at 10:00AM Feb 26, 2024Observed: 2.75 ft at 11:00AM Feb 26, 2024Observed: 2.75 ft at 12:00PM Feb 26, 2024Observed: 2.75 ft at 1:00PM Feb 26, 2024Observed: 2.75 ft at 2:00PM Feb 26, 2024Observed: 2.75 ft at 3:00PM Feb 26, 2024Observed: 2.75 ft at 4:00PM Feb 26, 2024Observed: 2.75 ft at 5:00PM Feb 26, 2024Observed: 2.75 ft at 6:00PM Feb 26, 2024Observed: 2.75 ft at 7:00PM Feb 26, 2024Observed: 2.75 ft at 8:00PM Feb 26, 2024Observed: 2.75 ft at 9:00PM Feb 26, 2024Observed: 2.75 ft at 10:00PM Feb 26, 2024Observed: 2.75 ft at 11:00PM Feb 26, 2024Observed: 2.75 ft at 11:59PM Feb 26, 2024Observed: 2.75 ft at 1:00AM Feb 27, 2024Observed: 2.75 ft at 2:00AM Feb 27, 2024Observed: 2.75 ft at 3:00AM Feb 27, 2024Observed: 2.75 ft at 4:00AM Feb 27, 2024Observed: 2.75 ft at 5:00AM Feb 27, 2024Observed: 2.75 ft at 6:00AM Feb 27, 2024Observed: 2.75 ft at 7:00AM Feb 27, 2024Observed: 2.75 ft at 8:00AM Feb 27, 2024Observed: 2.75 ft at 9:00AM Feb 27, 2024Observed: 2.74 ft at 11:00AM Feb 27, 2024Observed: 2.74 ft at 12:00PM Feb 27, 2024Observed: 2.74 ft at 1:00PM Feb 27, 2024Observed: 2.74 ft at 2:00PM Feb 27, 2024Observed: 2.74 ft at 3:00PM Feb 27, 2024Observed: 2.74 ft at 4:00PM Feb 27, 2024Observed: 2.73 ft at 5:00PM Feb 27, 2024Observed: 2.73 ft at 6:00PM Feb 27, 2024Observed: 2.73 ft at 7:00PM Feb 27, 2024Observed: 2.73 ft at 8:00PM Feb 27, 2024Observed: 2.73 ft at 9:00PM Feb 27, 2024Observed: 2.73 ft at 10:00PM Feb 27, 2024Observed: 2.73 ft at 11:00PM Feb 27, 2024Observed: 2.73 ft at 11:59PM Feb 27, 2024Observed: 2.73 ft at 1:00AM Feb 28, 2024Observed: 2.73 ft at 2:00AM Feb 28, 2024Observed: 2.73 ft at 3:00AM Feb 28, 2024Observed: 2.73 ft at 4:00AM Feb 28, 2024Observed: 2.72 ft at 5:00AM Feb 28, 2024Observed: 2.72 ft at 6:00AM Feb 28, 2024Observed: 2.72 ft at 7:00AM Feb 28, 2024Observed: 2.72 ft at 8:00AM Feb 28, 2024Observed: 2.72 ft at 9:00AM Feb 28, 2024Observed: 2.72 ft at 10:00AM Feb 28, 2024Observed: 2.72 ft at 11:00AM Feb 28, 2024Observed: 2.72 ft at 12:00PM Feb 28, 2024Observed: 2.72 ft at 1:00PM Feb 28, 2024Observed: 2.72 ft at 2:00PM Feb 28, 2024Observed: 2.72 ft at 3:00PM Feb 28, 2024Observed: 2.72 ft at 4:00PM Feb 28, 2024Observed: 2.72 ft at 5:00PM Feb 28, 2024Observed: 2.72 ft at 6:00PM Feb 28, 2024Observed: 2.72 ft at 7:00PM Feb 28, 2024Observed: 2.72 ft at 8:00PM Feb 28, 2024Observed: 2.72 ft at 9:00PM Feb 28, 2024Observed: 2.72 ft at 10:00PM Feb 28, 2024Observed: 2.72 ft at 11:00PM Feb 28, 2024Observed: 2.72 ft at 11:59PM Feb 28, 2024Observed: 2.72 ft at 1:00AM Feb 29, 2024Observed: 2.72 ft at 2:00AM Feb 29, 2024Observed: 2.72 ft at 3:00AM Feb 29, 2024Observed: 2.72 ft at 4:00AM Feb 29, 2024Observed: 2.72 ft at 5:00AM Feb 29, 2024Ventura County WPDASNC1(plotting HGIRR) Graph Created (5:40AM Feb 29, 2024)ObservedLatest observed value: 2.72 ft at 5:00 AM PST 29-Feb-2024.
Printable Image
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 Arroyo Simi near Simi Valley. During times of high water, forecast crest information can be found in the text products.
Return to Area Map
Downstream Gauge Downstream Gauge - at CSUCI Bridge
Flood Categories (in feet)
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.

Zoom Level:14
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.
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  
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
Los Angeles/Oxnard Weather Forecast Office
520 North Elevar Street
Oxnard, CA 93030
(805) 988-6610
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:27 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities