I can't see very well, so I thought that thundercloud was some kind of shadowy island or portal until last week when I looked at the map and zoomed in a large amount. I don't think they've added weather effects to maps before, but since it's always raining in a large part of the routes around Fortree and Lilycove, that's the perfect place to put a thundercloud. I was hoping it'd be some amazing new area...maybe we'll be able to see the thundercloud in-game.
