Don't brush off the lightning danger so quickly-----a few years back a guy was riding one of the urban trails here---the lightning strike blew his helmet to pieces and basically cooked his brain in his skull---needless to say----he was killed on the spot---now there's a nice little plaque on the side of the trail where it happened.
The funny thing about that day is that is was mostly sunny with just FEW clouds---and maybe a few drops coming from them---and he still got nailed. Point is---it doesn't have to be a really bad storm for lightning to occur.