Lightning/Thunder Delay

[bob jenkins]

Originally Posted by Rcichon

Our league mandates this:
Hear it, clear it.
See it, flee it.

30 minute clock on hearing thunder. Next one withing 30 minutes: go home.
See lightning, go home.

I don't understand why you wait if you hear it, but go home if you see it. Depending on the amount of daylight and the direction, you can sometimes hear thunder when you can't see lightning, and you can sometimes see lightning when you can't hear the thunder.