Sounds interesting, stay safe, post some pics if you get the chance.
It started about 9pm just the lightning for a couple of hours then the rain started and thunder kicked in later, last time I got woke up with the thunder was just after 5am. Never experienced a storm like it and nowhere close to that length of time, usually about 20 minutes or so if we get a thunderstorm.
My folks drove up from about an hour away to watch my son while we're at work and were saying they never got any rain but quite a bit of flooding on the drive up. Lot's of flooding in the 2 cities I'm halfway between, a house burned out after a lightning strike in a town about half an hour away and a train derailment this morning up north that I assume will be linked but we just got a free light show.
I did contemplate going down to the loch and trying to get some photos but I couldn't be bothered getting dressed and was enjoying the whisky so didn't end up moving.