To find the location of the mobile radar in Donostia / San Sebastián today, you can visit the official website of the Donostia / San Sebastián City Council or use a traffic app that provides real-time updates on mobile radar locations. These resources will give you the most accurate and up-to-date information on where the radar will be positioned.

For daily notifications about the mobile radar's location, consider subscribing to a traffic alert service or downloading a mobile app that specializes in traffic updates. Many such apps allow you to set up daily notifications specifically for your area, ensuring you receive information each morning about the radar's location or if it will not be in use that day.