Is it still a thunderstorm...

[RadiomanATL]

Purple haze...

 

[MHanson]

I am reminded of the old classic question. If a tree falls in a forest and there is no one to hear it, does it make a sound?

 

[Big Fitz]

As said before, lightning storms. I remember one time I was in Kansas City for a conference and there was purple lightning all over the pace. Very cool.

 

[Mr.Fitnah]

if there's rain and lightning but no actual thunder?

very strange; i believe it's the end times.

The thunder is there, you just may not hear it .