Radar - Live!
Rainradars are updated every 5-15 minutes with varying delay.
Blitzortung.org is a private network of lightning tracker stations with more than 1000 trackers in Europe. They catch the electromagnetic signals of strikes. Together with the time stamp the position of a strike can be calculated out of the signals (TOA - time of arrival method). You will find more information on the main site of the project: www.blitzortung.org.
Accuracy of Blitzortung is quite good and is usually lower than 1 kilometer. This is equal to commercial strike detection companies and metoffices.
To participate you have to get your own relatively inexpensive receiver. With that, you can participate in the network and you will get access to all strike data