Historic Data

    Historic Rainfall Data

    The user of the data is responsible for any errors resulting from data manipulation of this rainfall data. The user must be knowledgeable in using Excel as OC Public Works Staff are not available to provide software support for this data format. For general information on rainfall data please contact OC Watersheds at (714) 955-0600 or  CLICK HERE  to send an email  

    Excel spreadsheets and location maps for historic rainfall stations can also be found here on an interactive Weather Data Map.

    Station Number 

     Station Name

     Location Map

     Record Begins

    Buena Park 

    Map

    1926

    61

    Tustin - Irvine Ranch 

    Map

    1897

    88

     Newport Beach Harbor Master

    Map

    1921

    96

     Fullerton Hillcrest Reservoir

    Map

    1933

    100

     Laguna Beach

    Map

    1928

    121

    Santa Ana

    Map

    1933

    163

    Yorba Reservoir

    Map

    1955

    165

    Costa Mesa

    Map

    1955

    169

    Corona Del Mar

    Map

    1959

    173

    Villa Park Dam

    Map

    1961

    176

    El Toro

    Not Available

    1964

    186

    San Clemente (Palisades Reservoir)

    Map

    1965

    206

    Trabuco Forestry

    Map

    1971

    208

    Santiago Peak

    Not Available

    1998

    216

    Laguna Niguel (Sulphur Creek Dam)

    Map

    1974

    219

    Costa Mesa Water District

    Map

    1978

    222

    Orange Hardacre

    Not Available

    1980

    229

    Garden Grove (Fire Station)

    Map

    1985

    Hydrologic Reports

    Environmental Data Management Section publishes a Hydrologic Data Report containing data dating back as far as the late 1800s. New data is added each year from reporting (via radio telemetry) rain gages, recording non-reporting rain gages, and non-recording cooperative observer (maintained by volunteers) rain gages, and reporting water level stations.*

    These hydrologic data, coupled with satellite and radar tracking of storms, are used for flood detection, allowing maintenance crews to be assigned to potential problem areas. The result is a better allocation of resources and enhanced public safety. The data are also used for a variety of other municipal purposes by the private sector.

    If there are any questions regarding the details of a document, or to obtain a hard copy or other alternative formats of the original document, or to have a document read to you, please contact the OC Public Works offices, Monday through Friday, 7:00 am to 5:00 pm PST, at 2301 N. Glassell St., Orange, CA, 92865 by email at OC Watersheds, or by phone at (714) 955-0600.

      *As of 2005, hydrologic data is available upon request as raw datasets.


    Disclaimer

    Although the data provided using the County of Orange, OC Public Works systems has been produced and processed from sources believed to be reliable, no warranty expressed or implied is made regarding accuracy, adequacy, completeness, legality, reliability or usefulness of any information. The County of Orange, OC Public Works provides this information on an "as is" basis. All warranties of any kind express or implied, including but not limited the implied warranties of merchantability, fitness for a particular purpose are disclaimed.