Call Lightning--under what conditions?

[ARandomGod]

I think the described condition wouldn't be enough. It's close, mind you.

However I'm stuck on the clouds. I'd ask the DM how fast the clouds were moving. If they're moving fast (so it looks like a mini-hurricane) then I'd argue it really is stormy. If they're just placid, that suggests to me that it's not really a storm.

Whereas I would ask instead about the electrical potential in the clouds. I've seen some high grade storms come from completely still clouds.

 

[Quasqueton]

If in doubt, why not just roll percentile dice and say 01-50 = "stormy enough for d10s"; 51-00 = "not stormy enough for d10s"?

Quasquetons

 

[rrealm]

I'd give d10's in the above situation if the clouds were like this:
d6 clouds

I'd give d10's in the above situation if the clouds were like this:
d10 clouds

 

[ARandomGod]

I'd give d10's in the above situation if the clouds were like this:
d6 clouds

I'd give d10's in the above situation if the clouds were like this:
d10 clouds

Exactly what I said, but with pictures!!!

Ooohh, pretty.