What book did whitestorm die in?

Well, in Book 4: Rising Storm in the Warrior Series, it said that Whitestorm was a senior warrior. He might of been close to a elder.

In bluestars prophecy he was an adult when she became leader but sine all those cats died between bluestars prophecy and into the wild im gonna guess almost a elder because all those cats were perfectly healthy. so all that time from him being a kit to an adult times two since he was an adult and watched firestar grow up. so he was almost an elder.