so fly a kite with a steel wire tied to your mb in a stormy night?
That's dangerous and un necessary.
Did you know that just 10 meters of no. 14 AWG copper wire strung between two wooden poles, horizontal to the ground approx 10 meters in elevation can be found with 50kV potential on a clear, dry day?!
Tap that with a good drive line such as RG11 and strap the center conductor to a small spark gap or mercury filled discharge tube and lead the other side into your system. On every flash enough joules will be delivered to your system for the desired results.
As a thunderstorm approaches both EMF from sferics as well as highly charged air masses will make the setup go crazy. As always spark gaps to well earthed electrodes are necessary to prevent catastrophic electrical damage in case of a direct strike...