During observations in Europe you may use the following links to check latest information about thunderstorm activity:

Storm Forecast website European Storm Forecast Experiment Lightning activity maps Central Europe Lightning Data EUCLID (European Cooperation for Lightning Detection) Weather Online SFLOC European lightning activity Perun, IMGW Poland CELDN in Czech Republic WWLLN - World Wide Lightning Location Network map	Radar Maps Meteox (western Europe) IMGW Radar Map (Poland) CHMI Radar Network (Czech Republic) Satellite Maps IR satellite loop Meteosat 0 degree Infrared 10.8 Western Europe Meteosat 0 degree Infrared 10.8 Central Europe Meteosat 0 degree Infrared 10.8 Eastern Europe SPARTAN Sprite-Watch Support Maps (password protected) (Eumetsat via IMGW Krakow Satellite Remote Sensing Center)
Other Weather/Webcams at Pic du Midi Daylight map