So, we know the gloom, that pollution from Silvertear Skies that makes Mor Dhona look like the sky is ceran-wrapped with a weird fog of umbrally charged aether from the void.
Now in the skies above Abalathia's Spine, we see weirder things:
*Umbral Static - plasma charged lightning storms above the Churning Mists
*Umbral Wind - like ordinary wind, only there's weird green clouds overhead
And while not marked any different, Thunder weather in Azys Lla looks like a green version of Umbral Static.
So...what could be causing the weird weather up there? And why isn't there any Astral versions of weather?