I wasn't aware of that WoB- thanks for pointing it out.
Sorry if I worded it wrong but I meant what Yata said-
The stone idea came from the fact that thunderclasts were described as being ripped from the stone in Dalinar's visions and from the earthquake quote in my previous post.
Similarly storms seem to act as a focus for Honor.
Twisting my original theory slightly to fit with the WoB- if Honor is splintered (less powerful than Odium), it could allow Odium to focus power through the storms as the oppositional force (Honor) is weaker.
I don't know, it just seems significant that this is the first desolation since Honor's splintering and it's starting with a storm.