Last night those based in the Bristol / Bath area of the UK, were treated to a particularly epic lightning storm. Every 10-20 seconds for around 3-hours, fork lightning flashed across the sky in what proved to be a rather stunning display.
Lightningmaps.org provides a near real-time snapshot of all recorded lightning strikes across Europe and the US, and this screenshot was taken towards the end of the storm, in my area at least.
It's not initially clear from the dashboard interface, but the shade of yellow-orange represents how long ago the strike happened. The darker the colour, the longer ago it was. This screen-grab only highlights two time periods, but you can view as far back as 24 hours.
It was really interesting to watch the little blips appear in near real-time and see the expanse of the storm over time. Great stuff!