The odds of lightning striking?

Everyone I know tells me that they've either never experienced being hit by lightning during a storm, or that they've only been hit once or twice. However, lately the frequency of lightning bolts hitting characters - be it my characters, enemies or simple critters - seems to have skyrocketed in my game.

Earlier today, I was fighting the Belt Fetishist Ogre south of the Friendly Arm Inn. As I was about to finish it off, lightning struck it and stole my kill. "Fair enough" I thought to myself, and moved in to collect my loot...When lightning struck the corpse of the aforementioned ogre. I figured it would be safe now, and moved in to collect the loot again........When lightning struck me as I was doing so. I healed up, and was about to move on...When lightning struck somewhere behind me, a bit to the right of the ogre's corpse. Immediately after this, lightning struck again and almost killed my familiar.

As if five consecutive lighting bolts in a single area wasn't enough, lightning actually struck and killed Tethtoril in the Candlekeep prologue just now. It counted as me doing the deed, and I ended up being murdered by Phlydia as I was about to give her book back to her.

http://i.imgur.com/spKMbgW.gif


...So what are the odds of being struck by lightning supposed to be? (On Core difficulty, if that matters)