California Data Exchange Center (CDEC)

A good source for online streamflow and precipitation data.

• Link to CDEC data near CSUMB: http://cdec.water.ca.gov/cgi-progs/mapper?level=2&map=29&quad=5
• To obtain long series of data from this site, you can manually edit the URLs. For example, if the default link to real-time data is:
  • http://cdec.water.ca.gov/cgi-progs/queryF?s=PNR&d=03-Mar-2009+21:36&span=12hours
• You can edit it to get more data, like this:
  • http://cdec.water.ca.gov/cgi-progs/queryF?s=PNR&d=03-Mar-2009+21:36&span=12500hours