The storm must've been right over the island because the thunder and lightning was coming all at the same time and I've always been told that you can tell about how far away a thunderstorm is by counting the seconds between the lightning and the thunder, but in this case there weren't any seconds in between!
All I could think of was what it must've been like when the Nephites and Lamanites went through "thunderings and lightnings" as it's recorded in The Book of Mormon. I'm sure that it was much, much worse, but what a reminder of the awesome power of nature in response to God.
I hear the rolling thunder
Thy power throughout the universe displayed.