Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

Mechanically speaking you can change your deity in the nexus I think at the book sitting on the stand maybe? You will have to either rcr or talk to a dm about making sure you appropriate domains for talos though.

viewtopic.php?f=7&t=56908

Bare in mind just what a Stormlord actually is. If you are wishing to roleplay one according to Forgotten Realms lore, in which the server is set in, then there is not much in the way of 'wriggle room'.

Does Talos allow CN clerics? I can't remember. If so there is some room to rp just pure chaotic destruction reigning down on good and evil alike. Embrace the neutral as it were.

Also while Stormlords have to follow Talos rangers don't have the same alignment restrictions in order to be folllwers that clerics have do they?

its just clerics

and wiki says he allows CE, NE, CN; but i think the one point rule is whats enforced so it may or may not actually work depending on talos' alignment