Lightning,
I couldn't reach the site in between (bad luck)
From: http://www.blikseminslagen.com/vdh/gpg/lex1/mapdisplay_free.jsp?Update=Refresh
an with a lot of rain also:
From: http://weerkamer.nl/weer/radar/radar.fpl?uur=6
Quite impressive were the clouds rolling in:
The first nine pictures of this rolling cloud were taken from my roof
in four minutes time.
Two more cloud-pictures from the roof that moment:
More pictures of this thunderstorm: http://www.meteonet.nl/fotoverslag17072004.htm