Thanks again for your warm thought everyone.
It's still hard to believe she is gone. She didn't seem to have any symptoms of kidney disease. Another of my RB kitties Blackie died from renal failure but he had symptoms and was diagnosed about 5 months before he passed.
All of the other kitties seem fine. Winnie didn't really get along with her sister so I don't think she realizes Stormy is gone. Spyder was meowing around for the first couple of days but is not doing it now.
Here's one of my best pics of her