There is a great site showing real time maps of lightnings, Blitzortung.org. A map showing Weather Station Nagu’s surroundings is now embedded as page Blitzortung.org – real time lightnings on the website.
On Blitzortung.org, it is even possible to check lightnings of a specific date and time, and even play a loop of 1 hours to 48 hours!
Just a great site and a project behind it!